diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml index b3db3cf8c..b53d54936 100644 --- a/.github/workflows/codeql-analysis.yml +++ b/.github/workflows/codeql-analysis.yml @@ -43,6 +43,15 @@ jobs: - name: Checkout repository uses: actions/checkout@v3 + # Java setup step completes very fast, no need to run in a preconfigured docker container. + # CodeQL is intended to detect any Java toolchains added to the execution environment. + - name: Set up JDK 21 + uses: actions/setup-java@v3 + with: + distribution: corretto + java-version: 21 + cache: gradle + # Initializes the CodeQL tools for scanning. - name: Initialize CodeQL uses: github/codeql-action/init@v2 diff --git a/.github/workflows/cypress-integration.yml b/.github/workflows/cypress-integration.yml deleted file mode 100644 index 0fd16c257..000000000 --- a/.github/workflows/cypress-integration.yml +++ /dev/null @@ -1,54 +0,0 @@ -name: 'Cypress Integration Tests' - -on: [push] - -jobs: - cypressIntegration: - services: - mongo: - image: mongo - ports: - - 27017:27017 - - runs-on: ubuntu-latest - steps: - # Checkout each repo into sub-directories - - uses: actions/checkout@v2 - with: - repository: conveyal/analysis-ui - ref: 1701bd9aea859a4714bc3f35f5bcf767a3256a64 - path: ui - - uses: actions/checkout@v2 - with: - fetch-depth: 0 - path: r5 - # Build .jar and copy to ./ui directory (along with config file) - # Cache Gradle dependencies to speed up the shadow jar build - - uses: actions/cache@v1 - id: cache - with: - path: ~/.gradle/caches - key: gradle-caches - - uses: actions/setup-java@v1 - with: - java-version: 11 - - run: gradle shadowJar -x test - working-directory: r5 - - run: cp $(ls ./r5/build/libs/*-all.jar | head -n1) ./ui/latest.jar - - run: cp ./r5/analysis.properties.template ./ui/analysis.properties - - # Install / cache dependencies with Cypress to handle caching Cypress binary. - - uses: actions/setup-node@v2 - with: - node-version: '12' - - uses: cypress-io/github-action@v2 - env: - NEXT_PUBLIC_BASEMAP_DISABLED: true - NEXT_PUBLIC_CYPRESS: true - NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN: ${{ secrets.MAPBOX_ACCESS_TOKEN }} - with: - build: yarn build - start: yarn start, yarn start-backend # runs frontend and java server together - wait-on: 'http://localhost:3000, http://localhost:7070/version' - wait-on-timeout: 60 - working-directory: ui diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml index 24f08b055..7224c579c 100644 --- a/.github/workflows/gradle.yml +++ b/.github/workflows/gradle.yml @@ -28,24 +28,25 @@ jobs: # BUILD_TARGET:staging steps: # Starting in v2.2 checkout action fetches all tags when fetch-depth=0, for auto-versioning. - - uses: actions/checkout@v2.3.2 + - uses: actions/checkout@v3 with: fetch-depth: 0 # Java setup step completes very fast, no need to run in a preconfigured docker container. - - name: Set up JDK 11 + - name: Set up JDK 21 uses: actions/setup-java@v3 with: - java-version: 11 - distribution: temurin - cache: 'gradle' + distribution: corretto + java-version: 21 + cache: gradle - name: Show version string run: gradle -q printVersion | head -n1 - - name: Build and Test + - name: Build and test run: gradle build - - name: Ensure shadow JAR is runnable as local backend + # Check that build product is able to start up as a backend server before handing it to end-to-end testing + - name: Ensure backend runnable run: | cp analysis.properties.template analysis.properties - gradle testShadowJarRunnable + gradle testRunnable -x test - name: Publish to GH Packages # Supply access token to build.gradle (used in publishing.repositories.maven.credentials) env: diff --git a/LICENSE b/LICENSE index dbe6da4ec..f845c96e3 100644 --- a/LICENSE +++ b/LICENSE @@ -1,6 +1,6 @@ MIT License -Copyright (c) 2020 Conveyal +Copyright (c) 2020-2023 Conveyal Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal diff --git a/build.gradle b/build.gradle index 618a7bb88..d93f0e90b 100644 --- a/build.gradle +++ b/build.gradle @@ -1,8 +1,9 @@ plugins { id 'java' - id 'com.github.johnrengelman.shadow' version '8.1.0' + id 'application' id 'maven-publish' id 'com.palantir.git-version' version '2.0.0' + id 'com.github.johnrengelman.shadow' version '8.1.1' } group = 'com.conveyal' @@ -10,18 +11,19 @@ group = 'com.conveyal' version gitVersion() java { - sourceCompatibility = JavaVersion.VERSION_11 - targetCompatibility = JavaVersion.VERSION_11 + toolchain { + languageVersion.set(JavaLanguageVersion.of(21)) + } } jar { - // For Java 11 Modules, specify a module name. + // For Java 11+ Modules, specify a module name. // Do not create module-info.java until all our dependencies specify a module name. // Main-Class BackendMain will start a local backend. - // Build-Jdk-Spec mimics a Maven manifest entry that helps us automatically install the right JVM. + // Build-Jdk-Spec mimics a Maven manifest entry that helps us automatically install or select the right JVM. // Implementation-X attributes are needed for ImageIO (used by Geotools) to initialize in some environments. manifest { - attributes 'Automatic-Module-Name': 'com.conveyal.analysis', + attributes 'Automatic-Module-Name': 'com.conveyal.r5', 'Main-Class': 'com.conveyal.analysis.BackendMain', 'Build-Jdk-Spec': targetCompatibility.getMajorVersion(), 'Implementation-Title': 'Conveyal Analysis Backend', @@ -34,18 +36,19 @@ shadowJar { mergeServiceFiles() } -// Allow reflective access by Kryo to normally closed Java internals. -// This is used for testing equality, but also for building automatic Kryo (de)serializers. +// Allow reflective access by ObjectDiffer to normally closed Java internals. Used for round-trip testing serialization. +// IntelliJ seems not to pass these JVM arguments when running tests from within the IDE, so the Kryo serialization +// tests may only succeed under command line Gradle. test { + useJUnitPlatform() jvmArgs = ['--add-opens=java.base/java.io=ALL-UNNAMED', '--add-opens=java.base/java.time=ALL-UNNAMED', '--add-opens=java.base/java.time.zone=ALL-UNNAMED', '--add-opens=java.base/java.lang=ALL-UNNAMED'] - useJUnitPlatform() } -// `gradle publish` will upload both shadow and simple JAR to Github Packages -// On GH Actions, GITHUB_ACTOR env variable is supplied without specifying it in action yml. +// Set up publication of jar files to GitHub Packages Maven repository. +// On GitHub Actions, GITHUB_ACTOR env variable is supplied without specifying it in action yml. publishing { repositories { maven { @@ -58,10 +61,12 @@ publishing { } } publications { - // The presence of the shadow plugin somehow causes the shadow-jar to also be automatically included in this - // publication. Ideally we want to produce the shadow jar and upload it to S3 as a worker, but only publish the - // much smaller plain JAR without dependencies to Github Packages. On the other hand, we may want to publish - // shadow jars for tagged releases. + // The shadow plugin automatically creates and registers a component called "shadow" for integration with this + // Maven publish plugin. `gradle publish` will then upload both shadow jar and simple jar to Github Packages. + // See https://imperceptiblethoughts.com/shadow/getting-started/#default-java-groovy-tasks + // To run R5 with dependencies, Conveyal does not use shadow jars anymore, only the zip distribution or runBackend. + // For development builds and tests we don't need to produce a shadow jar, only publish the much smaller plain + // jar without dependencies to Github Packages. For now, we continue to attach shadow jars to tagged releases. gpr(MavenPublication) { from(components.java) } @@ -80,19 +85,25 @@ task copyDependencies(type: Copy) { into 'dependencies' } +application { + applicationDefaultJvmArgs = ['-Xmx6G'] + mainClass = 'com.conveyal.analysis.BackendMain' +} + // Run R5 as a local analysis backend with all dependencies on the classpath, without building a shadowJar. task runBackend (type: JavaExec) { - dependsOn(build) - classpath(sourceSets.main.runtimeClasspath) - mainClass = 'com.conveyal.analysis.BackendMain' + dependsOn(build) + maxHeapSize('7G') + classpath(sourceSets.main.runtimeClasspath) + mainClass = 'com.conveyal.analysis.BackendMain' } -// Start up an analysis local backend from a shaded JAR and ask it to shut down immediately. -// This is used to check in the automated build that the JAR is usable before we keep it. +// Start up an analysis local backend and ask it to shut down immediately. +// This is used to check in the automated build that the JAR is usable in end-to-end tests before we keep it. // Create a configuration properties file (by copying the template) before running this task. -task testShadowJarRunnable(type: JavaExec) { - dependsOn(shadowJar) - classpath(shadowJar.archiveFile.get()) +task testRunnable(type: JavaExec) { + dependsOn(build) + classpath(sourceSets.main.runtimeClasspath) mainClass = 'com.conveyal.analysis.BackendMain' jvmArgs("-Dconveyal.immediate.shutdown=true") } @@ -116,6 +127,12 @@ task createVersionProperties(dependsOn: processResources) { } } +// Fix inconsistent Gradle behavior (see https://github.com/gradle/gradle/issues/16791) +// By default JavaExec tasks use the JVM Gradle was launched with, ignoring the project-level toolchain. +tasks.withType(JavaExec).configureEach { + javaLauncher.set(javaToolchains.launcherFor(java.toolchain)) +} + classes { dependsOn createVersionProperties } @@ -136,10 +153,10 @@ configurations.all { dependencies { // Provides our logging API - implementation 'org.slf4j:slf4j-api:1.7.30' + implementation 'org.slf4j:slf4j-api:2.0.7' // Implementation of the logging API - implementation 'ch.qos.logback:logback-classic:1.2.3' + implementation 'ch.qos.logback:logback-classic:1.4.11' // Spark is an HTTP framework built on Jetty. Its name is the same as several other projects. implementation (group: 'com.sparkjava', name: 'spark-core', version: '2.7.2') { @@ -195,9 +212,6 @@ dependencies { // Commons IO gives us BOMInputStream for handling UTF-8 Byte Order Marks. implementation 'commons-io:commons-io:2.6' - // Guava provides a lot of functionality, collections, and tools "missing" from the Java standard library. - implementation 'com.google.guava:guava:28.2-jre' - // Java 8 rewrite of the Guava cache with asynchronous LoadingCaches. We don't currently use the async // capabilities, but Caffeine's LoadingCache syntax is more modern idiomatic Java than Guava's. implementation 'com.github.ben-manes.caffeine:caffeine:2.8.1' @@ -214,15 +228,19 @@ dependencies { // Commons Math gives us FastMath, MersenneTwister, and low-discrepancy vector generators. implementation 'org.apache.commons:commons-math3:3.0' - // Provides some shared serializers for Kryo. Introduces transitive dependencies on Guava, Trove, and Kryo. + // Provides some Kryo serializers for Guava and Trove collecitons. // Also provides classes for testing that a round trip through serialization reproduces the same network. // This is an external dependency (not merged into backend) because it's also used by OTP2. - // TODO arguably we should declare non-transitive dependencies on Guava, Trove, and Kryo since we use them directly - implementation 'com.conveyal:kryo-tools:1.3.0' + implementation 'com.conveyal:kryo-tools:1.6.0' + // Ensure the versions of the next three dependencies match the transitive dependencies of kryo-tools. + implementation 'com.esotericsoftware:kryo:5.5.0' + // Guava provides a lot of functionality, collections, and tools "missing" from the Java standard library. + implementation 'com.google.guava:guava:32.1.2-jre' // Trove supplies very efficient collections of primitive data types for Java. implementation 'net.sf.trove4j:trove4j:3.0.3' + // TODO eliminate custom Conveyal geojson library, use Geotools? implementation 'com.conveyal:jackson2-geojson:0.9' @@ -245,8 +263,7 @@ dependencies { ////// Test-only dependencies ////// // Java unit testing framework. - testImplementation(platform('org.junit:junit-bom:5.7.0')) - testImplementation('org.junit.jupiter:junit-jupiter') + testImplementation('org.junit.jupiter:junit-jupiter:5.9.2') // Chart drawing library for examining travel time distributions when crafting tests. // Although rarely used it should be low-impact: it is a test-only dependency with no transitive dependenices. diff --git a/src/main/java/com/conveyal/analysis/components/HttpApi.java b/src/main/java/com/conveyal/analysis/components/HttpApi.java index 65eec6bb3..9553e52be 100644 --- a/src/main/java/com/conveyal/analysis/components/HttpApi.java +++ b/src/main/java/com/conveyal/analysis/components/HttpApi.java @@ -179,7 +179,7 @@ private void respondToException(Exception e, Request request, Response response, // Include a stack trace except when the error is known to be about unauthenticated or unauthorized access, // in which case we don't want to leak information about the server to people scanning it for weaknesses. if (type != UNAUTHORIZED && type != FORBIDDEN) { - body.put("stackTrace", errorEvent.stackTrace); + body.put("stackTrace", errorEvent.filteredStackTrace); } response.status(code); response.type("application/json"); diff --git a/src/main/java/com/conveyal/analysis/components/broker/Broker.java b/src/main/java/com/conveyal/analysis/components/broker/Broker.java index 1eeb93641..0500df8b4 100644 --- a/src/main/java/com/conveyal/analysis/components/broker/Broker.java +++ b/src/main/java/com/conveyal/analysis/components/broker/Broker.java @@ -48,36 +48,41 @@ /** * This class distributes the tasks making up regional jobs to workers. *

- * It should aim to draw tasks fairly from all organizations, and fairly from all jobs within each - * organization, while attempting to respect the transport network affinity of each worker, giving - * the worker tasks that require the same network it has been using recently. + * It respects the declared transport network affinity of each worker, giving the worker tasks that + * relate to the same network it has been using recently, and is therefore already loaded in memory. *

- * Previously workers long-polled for work, holding lots of connections open. Now they short-poll - * and sleep for a while if there's no work. This is simpler and allows us to work withing much more - * standard HTTP frameworks. + * In our initial design, workers long-polled for work, holding lots of connections open. This was + * soon revised to short-poll and sleep for a while when there's no work. This was found to be + * simpler, allowing use of standard HTTP frameworks instead of custom networking code. *

- * The fact that workers continuously re-poll for work every 10-30 seconds serves as a signal to the - * broker that they are still alive and waiting. This also allows the broker to maintain a catalog - * of active workers. + * Issue conveyal/r5#596 arose because we'd only poll when a worker was running low on tasks or + * idling. A worker could disappear for a long time, leaving the backend to assume it had shut down + * or crashed. Workers were revised to poll more frequently even when they were busy and didn't + * need any new tasks to work on, providing a signal to the broker that they are still alive and + * functioning. This allows the broker to maintain a more accurate catalog of active workers. *

- * Because (at least currently) two organizations never share the same graph, we can get by with - * pulling tasks cyclically or randomly from all the jobs, and actively shape the number of workers - * with affinity for each graph by forcing some of them to accept tasks on graphs other than the one - * they have declared affinity for. + * Most methods on this class are synchronized because they can be called from many HTTP handler + * threads at once (when many workers are polling at once). We should occasionally evaluate whether + * synchronizing all methods to make this threadsafe is a performance issue. If so, fine-grained + * locking may be advantageous, but as a rule it is much harder to design, test, and maintain. *

- * This could be thought of as "affinity homeostasis". We will constantly keep track of the ideal + * Workers were originally intended to migrate from one network to another to handle subsequent jobs + * without waiting for more cloud compute instances to start up. In practice we currently assign + * each worker a single network, but the balance of workers assigned to each network and the reuse + * of workers could in principle be made more sophisticated. The remainder of the comments below + * provide context for how this could be refined or improved. + * + * Because (at least currently) two organizations never share the same graph, we could get by with + * pulling tasks cyclically or randomly from all the jobs, and could actively shape the number of + * workers with affinity for each graph by forcing some of them to accept tasks on graphs other than + * the one they have declared affinity for. If the pool of workers was allowed to grow very large, + * we could aim to draw tasks fairly from all organizations, and fairly from all jobs within each + * organization. + *

+ * We have described this approach as "affinity homeostasis": constantly keep track of the ideal * proportion of workers by graph (based on active jobs), and the true proportion of consumers by * graph (based on incoming polling), then we can decide when a worker's graph affinity should be - * ignored and what it should be forced to. - *

- * It may also be helpful to mark jobs every time they are skipped in the LRU queue. Each time a job - * is serviced, it is taken out of the queue and put at its end. Jobs that have not been serviced - * float to the top. - *

- * Most methods on this class are synchronized, because they can be called from many HTTP handler - * threads at once. - * - * TODO evaluate whether synchronizing all methods to make this threadsafe is a performance issue. + * ignored and what graph it should be forced to. */ public class Broker implements Component { @@ -100,7 +105,15 @@ public interface Config { private final ListMultimap jobs = MultimapBuilder.hashKeys().arrayListValues().build(); - /** The most tasks to deliver to a worker at a time. */ + /** + * The most tasks to deliver to a worker at a time. Workers may request less tasks than this, and the broker should + * never send more than the minimum of the two values. 50 tasks gives response bodies of about 65kB. If this value + * is too high, all remaining tasks in a job could be distributed to a single worker leaving none for the other + * workers, creating a slow-joiner problem especially if the tasks are complicated and slow to complete. + * + * The value should eventually be tuned. The current value of 16 is just the value used by the previous sporadic + * polling system (WorkerStatus.LEGACY_WORKER_MAX_TASKS) which may not be ideal but is known to work. + */ public final int MAX_TASKS_PER_WORKER = 16; /** @@ -164,19 +177,23 @@ public synchronized void enqueueTasksForRegionalJob (RegionalAnalysis regionalAn LOG.error("Someone tried to enqueue job {} but it already exists.", templateTask.jobId); throw new RuntimeException("Enqueued duplicate job " + templateTask.jobId); } + // Create the Job object to share with the MultiOriginAssembler, but defer adding this job to the Multimap of + // active jobs until we're sure the result assembler was constructed without any errors. Always add and remove + // the Job and corresponding MultiOriginAssembler as a unit in the same synchronized block of code (see #887). WorkerTags workerTags = WorkerTags.fromRegionalAnalysis(regionalAnalysis); Job job = new Job(templateTask, workerTags); - jobs.put(job.workerCategory, job); // Register the regional job so results received from multiple workers can be assembled into one file. + // If any parameters fail checks here, an exception may cause this method to exit early. // TODO encapsulate MultiOriginAssemblers in a new Component - // Note: if this fails with an exception we'll have a job enqueued, possibly being processed, with no assembler. - // That is not catastrophic, but the user may need to recognize and delete the stalled regional job. MultiOriginAssembler assembler = new MultiOriginAssembler(regionalAnalysis, job, fileStorage); resultAssemblers.put(templateTask.jobId, assembler); + // A MultiOriginAssembler was successfully put in place. It's now safe to register and start the Job. + jobs.put(job.workerCategory, job); + + // If this is a fake job for testing, don't confuse the worker startup code below with its null graph ID. if (config.testTaskRedelivery()) { - // This is a fake job for testing, don't confuse the worker startup code below with null graph ID. return; } @@ -317,9 +334,13 @@ public void createWorkersInCategory (WorkerCategory category, WorkerTags workerT /** * Attempt to find some tasks that match what a worker is requesting. - * Always returns a list, which may be empty if there is nothing to deliver. + * Always returns a non-null List, which may be empty if there is nothing to deliver. + * Number of tasks in the list is strictly limited to maxTasksRequested. */ - public synchronized List getSomeWork (WorkerCategory workerCategory) { + public synchronized List getSomeWork (WorkerCategory workerCategory, int maxTasksRequested) { + if (maxTasksRequested <= 0) { + return Collections.EMPTY_LIST; + } Job job; if (config.offline()) { // Working in offline mode; get tasks from the first job that has any tasks to deliver. @@ -335,7 +356,10 @@ public synchronized List getSomeWork (WorkerCategory workerCategor return Collections.EMPTY_LIST; } // Return up to N tasks that are waiting to be processed. - return job.generateSomeTasksToDeliver(MAX_TASKS_PER_WORKER); + if (maxTasksRequested > MAX_TASKS_PER_WORKER) { + maxTasksRequested = MAX_TASKS_PER_WORKER; + } + return job.generateSomeTasksToDeliver(maxTasksRequested); } /** @@ -365,14 +389,20 @@ public synchronized void markTaskCompleted (Job job, int taskId) { } /** - * When job.errors is non-empty, job.isErrored() becomes true and job.isActive() becomes false. + * Record an error that happened while a worker was processing a task on the given job. This method is tolerant + * of job being null, because it's called on a code path where any number of things could be wrong or missing. + * This method also ensures synchronization of writes to Jobs from any non-synchronized sections of an HTTP handler. + * Once job.errors is non-empty, job.isErrored() becomes true and job.isActive() becomes false. * The Job will stop delivering tasks, allowing workers to shut down, but will continue to exist allowing the user * to see the error message. User will then need to manually delete it, which will remove the result assembler. - * This method ensures synchronization of writes to Jobs from the unsynchronized worker poll HTTP handler. */ private synchronized void recordJobError (Job job, String error) { if (job != null) { - job.errors.add(error); + // Limit the number of errors recorded to one. + // Still using a Set instead of just String since the set of errors is exposed in a UI-facing API. + if (job.errors.isEmpty()) { + job.errors.add(error); + } } } @@ -468,21 +498,23 @@ public void handleRegionalWorkResult(RegionalWorkResult workResult) { // Once the job is retrieved, it can be used below to requestExtraWorkersIfAppropriate without synchronization, // because that method only uses final fields of the job. Job job = null; - MultiOriginAssembler assembler; try { + MultiOriginAssembler assembler; synchronized (this) { job = findJob(workResult.jobId); + // Record any error reported by the worker and don't pass bad results on to regional result assembly. + // This will mark the job as errored and not-active, stopping distribution of tasks to workers. + // To ensure that happens, record errors before any other conditional that could exit this method. + if (workResult.error != null) { + recordJobError(job, workResult.error); + return; + } assembler = resultAssemblers.get(workResult.jobId); if (job == null || assembler == null || !job.isActive()) { // This will happen naturally for all delivered tasks after a job is deleted or it errors out. LOG.debug("Ignoring result for unrecognized, deleted, or inactive job ID {}.", workResult.jobId); return; } - if (workResult.error != null) { - // Record any error reported by the worker and don't pass bad results on to regional result assembly. - recordJobError(job, workResult.error); - return; - } // Mark tasks completed first before passing results to the assembler. On the final result received, // this will minimize the risk of race conditions by quickly making the job invisible to incoming stray // results from spurious redeliveries, before the assembler is busy finalizing and uploading results. diff --git a/src/main/java/com/conveyal/analysis/components/broker/Job.java b/src/main/java/com/conveyal/analysis/components/broker/Job.java index fa2c2ca66..28829c33c 100644 --- a/src/main/java/com/conveyal/analysis/components/broker/Job.java +++ b/src/main/java/com/conveyal/analysis/components/broker/Job.java @@ -123,8 +123,11 @@ private RegionalTask makeOneTask (int taskNumber) { public int deliveryPass = 0; /** - * If any error compromises the usabilty or quality of results from any origin, it is recorded here. + * If any error compromises the usability or quality of results from any origin, it is recorded here. * This is a Set because identical errors are likely to be reported from many workers or individual tasks. + * The presence of an error here causes the job to be considered "errored" and "inactive" and stop delivering tasks. + * There is some risk here of accumulating unbounded amounts of large error messages (see #919). + * The field type could be changed to a single String instead of Set, but it's exposed on a UI-facing API as a Set. */ public final Set errors = new HashSet(); @@ -177,7 +180,7 @@ public boolean isErrored () { /** * @param maxTasks the maximum number of tasks to return. * @return some tasks that are not yet marked as completed and have not yet been delivered in - * this delivery pass. + * this delivery pass. May return an empty list, but never null. */ public List generateSomeTasksToDeliver (int maxTasks) { List tasks = new ArrayList<>(maxTasks); diff --git a/src/main/java/com/conveyal/analysis/components/broker/WorkerCatalog.java b/src/main/java/com/conveyal/analysis/components/broker/WorkerCatalog.java index c91ca7ae8..18ed6534f 100644 --- a/src/main/java/com/conveyal/analysis/components/broker/WorkerCatalog.java +++ b/src/main/java/com/conveyal/analysis/components/broker/WorkerCatalog.java @@ -1,6 +1,7 @@ package com.conveyal.analysis.components.broker; import com.conveyal.r5.analyst.WorkerCategory; +import com.conveyal.r5.analyst.cluster.AnalysisWorker; import com.conveyal.r5.analyst.cluster.WorkerStatus; import com.google.common.collect.HashMultimap; import com.google.common.collect.Multimap; @@ -21,7 +22,8 @@ */ public class WorkerCatalog { - public static final int WORKER_RECORD_DURATION_MSEC = 2 * 60 * 1000; + /** If a worker says it will poll every s seconds or less, wait s plus this number before considering it gone. */ + private static final int POLLING_TOLERANCE_SECONDS = 5; /** * The information supplied by workers the last time they polled for more tasks. @@ -74,9 +76,9 @@ public synchronized void catalog (WorkerStatus workerStatus) { */ private synchronized void purgeDeadWorkers () { long now = System.currentTimeMillis(); - long oldestAcceptable = now - WORKER_RECORD_DURATION_MSEC; List ancientObservations = new ArrayList<>(); for (WorkerObservation observation : observationsByWorkerId.values()) { + long oldestAcceptable = now - ((observation.status.pollIntervalSeconds + POLLING_TOLERANCE_SECONDS) * 1000); if (observation.lastSeen < oldestAcceptable) { ancientObservations.add(observation); } diff --git a/src/main/java/com/conveyal/analysis/components/eventbus/ErrorEvent.java b/src/main/java/com/conveyal/analysis/components/eventbus/ErrorEvent.java index 24dc542f1..6011dde0c 100644 --- a/src/main/java/com/conveyal/analysis/components/eventbus/ErrorEvent.java +++ b/src/main/java/com/conveyal/analysis/components/eventbus/ErrorEvent.java @@ -2,6 +2,8 @@ import com.conveyal.r5.util.ExceptionUtils; +import static com.conveyal.r5.util.ExceptionUtils.filterStackTrace; + /** * This Event is fired each time a Throwable (usually an Exception or Error) occurs on the backend. It can then be * recorded or tracked in various places - the console logs, Slack, etc. This could eventually be used for errors on @@ -9,11 +11,11 @@ */ public class ErrorEvent extends Event { - // We may serialize this object, so we convert the Throwable to two strings to control its representation. + // All Events are intended to be eligible for serialization into a log or database, so we convert the Throwable to + // some Strings to determine its representation in a simple way. // For flexibility in event handlers, it is tempting to hold on to the original Throwable instead of derived // Strings. Exceptions are famously slow, but it's the initial creation and filling in the stack trace that are - // slow. Once the instace exists, repeatedly examining its stack trace should not be prohibitively costly. Still, - // we do probably gain some efficiency by converting the stack trace to a String once and reusing that. + // slow. Once the instance exists, repeatedly examining its stack trace should not be prohibitively costly. public final String summary; @@ -23,11 +25,16 @@ public class ErrorEvent extends Event { */ public final String httpPath; + /** The full stack trace of the exception that occurred. */ public final String stackTrace; + /** A minimal stack trace showing the immediate cause within Conveyal code. */ + public final String filteredStackTrace; + public ErrorEvent (Throwable throwable, String httpPath) { this.summary = ExceptionUtils.shortCauseString(throwable); this.stackTrace = ExceptionUtils.stackTraceString(throwable); + this.filteredStackTrace = ExceptionUtils.filterStackTrace(throwable); this.httpPath = httpPath; } @@ -54,25 +61,9 @@ public String traceWithContext (boolean verbose) { if (verbose) { builder.append(stackTrace); } else { - builder.append(filterStackTrace(stackTrace)); + builder.append(filteredStackTrace); } return builder.toString(); } - private static String filterStackTrace (String stackTrace) { - if (stackTrace == null) return null; - final String unknownFrame = "Unknown stack frame, probably optimized out by JVM."; - String error = stackTrace.lines().findFirst().get(); - String frame = stackTrace.lines() - .map(String::strip) - .filter(s -> s.startsWith("at ")) - .findFirst().orElse(unknownFrame); - String conveyalFrame = stackTrace.lines() - .map(String::strip) - .filter(s -> s.startsWith("at com.conveyal.")) - .filter(s -> !frame.equals(s)) - .findFirst().orElse(""); - return String.join("\n", error, frame, conveyalFrame); - } - } diff --git a/src/main/java/com/conveyal/analysis/controllers/BrokerController.java b/src/main/java/com/conveyal/analysis/controllers/BrokerController.java index 409180fef..9deb1a882 100644 --- a/src/main/java/com/conveyal/analysis/controllers/BrokerController.java +++ b/src/main/java/com/conveyal/analysis/controllers/BrokerController.java @@ -14,6 +14,7 @@ import com.conveyal.analysis.persistence.Persistence; import com.conveyal.analysis.util.HttpStatus; import com.conveyal.analysis.util.JsonUtil; +import com.conveyal.gtfs.util.Util; import com.conveyal.r5.analyst.WorkerCategory; import com.conveyal.r5.analyst.cluster.AnalysisWorker; import com.conveyal.r5.analyst.cluster.RegionalTask; @@ -45,6 +46,7 @@ import java.net.NoRouteToHostException; import java.net.SocketTimeoutException; +import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; @@ -52,6 +54,7 @@ import java.util.Map; import java.util.UUID; +import static com.conveyal.r5.common.Util.human; import static com.conveyal.r5.common.Util.notNullOrEmpty; import static com.google.common.base.Preconditions.checkNotNull; @@ -289,7 +292,8 @@ private String jsonResponse (Response response, int statusCode, Object object) { // We could call response.body(jsonMapper.writeValueAsBytes(object)); // but then the calling handler functions need to explicitly return null which is weird. try { - return jsonMapper.writeValueAsString(object); + String body = jsonMapper.writeValueAsString(object); + return body; } catch (JsonProcessingException e) { throw AnalysisServerException.unknown(e); } @@ -362,7 +366,7 @@ private Object workerPoll (Request request, Response response) { broker.recordWorkerObservation(workerStatus); WorkerCategory workerCategory = workerStatus.getWorkerCategory(); // See if any appropriate tasks exist for this worker. - List tasks = broker.getSomeWork(workerCategory); + List tasks = broker.getSomeWork(workerCategory, workerStatus.maxTasksRequested); // If there is no work for the worker, signal this clearly with a "no content" code, // so the worker can sleep a while before the next polling attempt. if (tasks.isEmpty()) { diff --git a/src/main/java/com/conveyal/analysis/controllers/DataSourceController.java b/src/main/java/com/conveyal/analysis/controllers/DataSourceController.java index 8fbcbe2da..c61f6a687 100644 --- a/src/main/java/com/conveyal/analysis/controllers/DataSourceController.java +++ b/src/main/java/com/conveyal/analysis/controllers/DataSourceController.java @@ -35,7 +35,7 @@ import static com.conveyal.analysis.util.JsonUtil.toJson; import static com.conveyal.file.FileCategory.DATASOURCES; import static com.conveyal.file.FileStorageFormat.SHP; -import static com.conveyal.r5.analyst.WebMercatorGridPointSet.parseZoom; +import static com.conveyal.r5.analyst.WebMercatorExtents.parseZoom; import static com.mongodb.client.model.Filters.eq; /** diff --git a/src/main/java/com/conveyal/analysis/controllers/OpportunityDatasetController.java b/src/main/java/com/conveyal/analysis/controllers/OpportunityDatasetController.java index cd2932c03..b1afcfc05 100644 --- a/src/main/java/com/conveyal/analysis/controllers/OpportunityDatasetController.java +++ b/src/main/java/com/conveyal/analysis/controllers/OpportunityDatasetController.java @@ -59,7 +59,7 @@ import static com.conveyal.analysis.datasource.DataSourceUtil.detectUploadFormatAndValidate; import static com.conveyal.analysis.util.JsonUtil.toJson; import static com.conveyal.file.FileCategory.GRIDS; -import static com.conveyal.r5.analyst.WebMercatorGridPointSet.parseZoom; +import static com.conveyal.r5.analyst.WebMercatorExtents.parseZoom; import static com.conveyal.r5.analyst.progress.WorkProductType.OPPORTUNITY_DATASET; /** diff --git a/src/main/java/com/conveyal/analysis/datasource/derivation/AggregationAreaDerivation.java b/src/main/java/com/conveyal/analysis/datasource/derivation/AggregationAreaDerivation.java index dd16c11a1..07d162c10 100644 --- a/src/main/java/com/conveyal/analysis/datasource/derivation/AggregationAreaDerivation.java +++ b/src/main/java/com/conveyal/analysis/datasource/derivation/AggregationAreaDerivation.java @@ -36,7 +36,7 @@ import java.util.zip.GZIPOutputStream; import static com.conveyal.file.FileStorageFormat.SHP; -import static com.conveyal.r5.analyst.WebMercatorGridPointSet.parseZoom; +import static com.conveyal.r5.analyst.WebMercatorExtents.parseZoom; import static com.conveyal.r5.analyst.progress.WorkProductType.AGGREGATION_AREA; import static com.conveyal.r5.util.ShapefileReader.GeometryType.POLYGON; import static com.google.common.base.Preconditions.checkArgument; diff --git a/src/main/java/com/conveyal/analysis/models/AnalysisRequest.java b/src/main/java/com/conveyal/analysis/models/AnalysisRequest.java index 7df1df676..fbc02859b 100644 --- a/src/main/java/com/conveyal/analysis/models/AnalysisRequest.java +++ b/src/main/java/com/conveyal/analysis/models/AnalysisRequest.java @@ -162,6 +162,21 @@ public class AnalysisRequest { */ public ChaosParameters injectFault; + /** + * Whether to include the number of opportunities reached during each minute of travel in results sent back + * to the broker. Requires both an origin and destination pointset to be specified, and in the case of regional + * analyses the origins must be non-gridded, and results will be collated to CSV. + * It should be possible to enable regional results for gridded origins as well. + */ + public boolean includeTemporalDensity = false; + + /** + * If this is set to a value above zero, report the amount of time needed to reach the given number of + * opportunities from this origin (known technically as "dual accessibility"). + */ + public int dualAccessibilityThreshold = 0; + + /** * Create the R5 `Scenario` from this request. */ @@ -202,9 +217,7 @@ public void populateTask (AnalysisWorkerTask task, UserPermissions userPermissio task.maxFare = maxFare; task.inRoutingFareCalculator = inRoutingFareCalculator; - // TODO define class with static factory function WebMercatorGridBounds.fromLatLonBounds(). - // Also include getIndex(x, y), getX(index), getY(index), totalTasks() - WebMercatorExtents extents = WebMercatorExtents.forWgsEnvelope(bounds.envelope(), zoom); + WebMercatorExtents extents = WebMercatorExtents.forTrimmedWgsEnvelope(bounds.envelope(), zoom); task.height = extents.height; task.north = extents.north; task.west = extents.west; @@ -267,6 +280,9 @@ public void populateTask (AnalysisWorkerTask task, UserPermissions userPermissio throw new IllegalArgumentException("Must be admin user to inject faults."); } } + + task.includeTemporalDensity = includeTemporalDensity; + task.dualAccessibilityThreshold = dualAccessibilityThreshold; } private EnumSet getEnumSetFromString (String s) { diff --git a/src/main/java/com/conveyal/analysis/models/ConvertToFrequency.java b/src/main/java/com/conveyal/analysis/models/ConvertToFrequency.java index 0fbbddf46..812e4caca 100644 --- a/src/main/java/com/conveyal/analysis/models/ConvertToFrequency.java +++ b/src/main/java/com/conveyal/analysis/models/ConvertToFrequency.java @@ -32,9 +32,6 @@ public static class FrequencyEntry extends AbstractTimetable { /** trip from which to copy travel times */ public String sourceTrip; - /** trips on the selected patterns which could be used as source trips */ - public String[] patternTrips; - public AddTrips.PatternTimetable toR5 (String feed) { AddTrips.PatternTimetable pt = toBaseR5Timetable(); diff --git a/src/main/java/com/conveyal/analysis/results/CsvResultType.java b/src/main/java/com/conveyal/analysis/results/CsvResultType.java index cdf60e410..29446ba98 100644 --- a/src/main/java/com/conveyal/analysis/results/CsvResultType.java +++ b/src/main/java/com/conveyal/analysis/results/CsvResultType.java @@ -5,5 +5,5 @@ * do serve to enumerate the acceptable parameters coming over the HTTP API. */ public enum CsvResultType { - ACCESS, TIMES, PATHS + ACCESS, TIMES, PATHS, TDENSITY } diff --git a/src/main/java/com/conveyal/analysis/results/CsvResultWriter.java b/src/main/java/com/conveyal/analysis/results/CsvResultWriter.java index e07abc2af..ca0cf09c5 100644 --- a/src/main/java/com/conveyal/analysis/results/CsvResultWriter.java +++ b/src/main/java/com/conveyal/analysis/results/CsvResultWriter.java @@ -12,6 +12,8 @@ import java.io.FileWriter; import java.io.IOException; +import static com.google.common.base.Preconditions.checkArgument; +import static com.google.common.base.Preconditions.checkNotNull; import static com.google.common.base.Preconditions.checkState; /** @@ -39,7 +41,12 @@ public abstract class CsvResultWriter extends BaseResultWriter implements Region */ public abstract CsvResultType resultType (); - /** Override to provide column names for this CSV writer. */ + /** + * Override to provide column names for this CSV writer. + * NOTE: Due to Java weirdness, subclass implementations of this method will be called by the CsvResultWriter + * constructor at a time when fields of the subclass remain initialized, but uninitialized final primitive + * fields are still readable! Do not read subclass fields in these implementations until/unless this is restructured. + */ protected abstract String[] columnHeaders (); /** Override to extract row values from a single origin result. */ @@ -55,6 +62,7 @@ public abstract class CsvResultWriter extends BaseResultWriter implements Region */ CsvResultWriter (RegionalTask task, FileStorage fileStorage) throws IOException { super(fileStorage); + checkArgument(task.originPointSet != null, "CsvResultWriters require FreeFormPointSet origins."); super.prepare(task.jobId); this.fileName = task.jobId + "_" + resultType() +".csv"; BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(bufferFile)); diff --git a/src/main/java/com/conveyal/analysis/results/MultiOriginAssembler.java b/src/main/java/com/conveyal/analysis/results/MultiOriginAssembler.java index 3bbd5915f..dc2b0b150 100644 --- a/src/main/java/com/conveyal/analysis/results/MultiOriginAssembler.java +++ b/src/main/java/com/conveyal/analysis/results/MultiOriginAssembler.java @@ -7,6 +7,8 @@ import com.conveyal.file.FileStorage; import com.conveyal.file.FileStorageFormat; import com.conveyal.r5.analyst.PointSet; +import com.conveyal.r5.analyst.cluster.PathResult; +import com.conveyal.r5.analyst.cluster.RegionalTask; import com.conveyal.r5.analyst.cluster.RegionalWorkResult; import com.conveyal.r5.util.ExceptionUtils; import org.slf4j.Logger; @@ -89,28 +91,36 @@ public MultiOriginAssembler (RegionalAnalysis regionalAnalysis, Job job, FileSto this.job = job; this.nOriginsTotal = job.nTasksTotal; this.originsReceived = new BitSet(job.nTasksTotal); - // Check that origin and destination sets are not too big for generating CSV files. - if (!job.templateTask.makeTauiSite && - job.templateTask.destinationPointSetKeys[0].endsWith(FileStorageFormat.FREEFORM.extension) - ) { - // This requires us to have already loaded this destination pointset instance into the transient field. - PointSet destinationPointSet = job.templateTask.destinationPointSets[0]; - if ((job.templateTask.recordTimes || job.templateTask.includePathResults) && !job.templateTask.oneToOne) { - if (nOriginsTotal * destinationPointSet.featureCount() > MAX_FREEFORM_OD_PAIRS || - destinationPointSet.featureCount() > MAX_FREEFORM_DESTINATIONS - ) { - throw new AnalysisServerException(String.format( - "Freeform requests limited to %d destinations and %d origin-destination pairs.", - MAX_FREEFORM_DESTINATIONS, MAX_FREEFORM_OD_PAIRS - )); - } + // If results have been requested for freeform origins, check that the origin and + // destination pointsets are not too big for generating CSV files. + RegionalTask task = job.templateTask; + if (!task.makeTauiSite && task.destinationPointSetKeys[0].endsWith(FileStorageFormat.FREEFORM.extension)) { + // This requires us to have already loaded this destination pointset instance into the transient field. + PointSet destinationPointSet = task.destinationPointSets[0]; + int nDestinations = destinationPointSet.featureCount(); + int nODPairs = task.oneToOne ? nOriginsTotal : nOriginsTotal * nDestinations; + if (task.recordTimes && + (nDestinations > MAX_FREEFORM_DESTINATIONS || nODPairs > MAX_FREEFORM_OD_PAIRS)) { + throw AnalysisServerException.badRequest(String.format( + "Travel time results limited to %d destinations and %d origin-destination pairs.", + MAX_FREEFORM_DESTINATIONS, MAX_FREEFORM_OD_PAIRS + )); + } + if (task.includePathResults && + (nDestinations > PathResult.MAX_PATH_DESTINATIONS || nODPairs > MAX_FREEFORM_OD_PAIRS)) { + throw AnalysisServerException.badRequest(String.format( + "Path results limited to %d destinations and %d origin-destination pairs.", + PathResult.MAX_PATH_DESTINATIONS, MAX_FREEFORM_OD_PAIRS + )); } } if (job.templateTask.recordAccessibility) { if (job.templateTask.originPointSet != null) { + // Freeform origins - create CSV regional analysis results resultWriters.add(new AccessCsvResultWriter(job.templateTask, fileStorage)); } else { + // Gridded origins - create gridded regional analysis results resultWriters.add(new MultiGridResultWriter(regionalAnalysis, job.templateTask, fileStorage)); } } @@ -123,6 +133,20 @@ public MultiOriginAssembler (RegionalAnalysis regionalAnalysis, Job job, FileSto resultWriters.add(new PathCsvResultWriter(job.templateTask, fileStorage)); } + if (job.templateTask.includeTemporalDensity) { + if (job.templateTask.originPointSet == null) { + // Gridded origins. The full temporal density information is probably too voluminous to be useful. + // We might want to record a grid of dual accessibility values, but this will require some serious + // refactoring of the GridResultWriter. + // if (job.templateTask.dualAccessibilityThreshold > 0) { ... } + throw new IllegalArgumentException("Temporal density of opportunities cannot be recorded for gridded origin points."); + } else { + // Freeform origins. + // Output includes temporal density of opportunities and optionally dual accessibility. + resultWriters.add(new TemporalDensityCsvResultWriter(job.templateTask, fileStorage)); + } + } + checkArgument(job.templateTask.makeTauiSite || notNullOrEmpty(resultWriters), "A non-Taui regional analysis should always create at least one grid or CSV file."); @@ -136,8 +160,11 @@ public MultiOriginAssembler (RegionalAnalysis regionalAnalysis, Job job, FileSto regionalAnalysis.resultStorage.put(csvWriter.resultType(), csvWriter.fileName); } } + } catch (AnalysisServerException e) { + throw e; } catch (Exception e) { - throw new RuntimeException("Exception while creating multi-origin assembler: " + ExceptionUtils.stackTraceString(e)); + // Handle any obscure problems we don't want end users to see without context of MultiOriginAssembler. + throw new RuntimeException("Exception while creating multi-origin assembler: " + e.toString(), e); } } diff --git a/src/main/java/com/conveyal/analysis/results/TemporalDensityCsvResultWriter.java b/src/main/java/com/conveyal/analysis/results/TemporalDensityCsvResultWriter.java new file mode 100644 index 000000000..02a6168ad --- /dev/null +++ b/src/main/java/com/conveyal/analysis/results/TemporalDensityCsvResultWriter.java @@ -0,0 +1,94 @@ +package com.conveyal.analysis.results; + +import com.conveyal.file.FileStorage; +import com.conveyal.r5.analyst.cluster.RegionalTask; +import com.conveyal.r5.analyst.cluster.RegionalWorkResult; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; + +/** + * This handles collating regional results into CSV files containing temporal opportunity density + * (number of opportunities reached in each one-minute interval, the derivative of step-function accessibility) + * as well as "dual" accessibility (the amount of time needed to reach n opportunities). + */ +public class TemporalDensityCsvResultWriter extends CsvResultWriter { + + private final int dualThreshold; + + public TemporalDensityCsvResultWriter(RegionalTask task, FileStorage fileStorage) throws IOException { + super(task, fileStorage); + dualThreshold = task.dualAccessibilityThreshold; + } + + @Override + public CsvResultType resultType () { + return CsvResultType.TDENSITY; + } + + @Override + public String[] columnHeaders () { + List headers = new ArrayList<>(); + // The ids of the freeform origin point and destination set + headers.add("origin"); + headers.add("destinations"); + headers.add("percentile"); + // The number of minutes needed to reach d destination opportunities + headers.add("dual"); + // The opportunity density during each of 120 minutes + for (int m = 0; m < 120; m += 1) { + headers.add(Integer.toString(m)); + } + return headers.toArray(new String[0]); + } + + @Override + protected void checkDimension (RegionalWorkResult workResult) { + checkDimension( + workResult, "destination pointsets", + workResult.opportunitiesPerMinute.length, task.destinationPointSetKeys.length + ); + for (double[][] percentilesForPointset : workResult.opportunitiesPerMinute) { + checkDimension(workResult, "percentiles", percentilesForPointset.length, task.percentiles.length); + for (double[] minutesForPercentile : percentilesForPointset) { + checkDimension(workResult, "minutes", minutesForPercentile.length, 120); + } + } + } + + @Override + public Iterable rowValues (RegionalWorkResult workResult) { + List rows = new ArrayList<>(); + String originId = task.originPointSet.getId(workResult.taskId); + for (int d = 0; d < task.destinationPointSetKeys.length; d++) { + double[][] percentilesForDestPointset = workResult.opportunitiesPerMinute[d]; + for (int p = 0; p < task.percentiles.length; p++) { + List row = new ArrayList<>(125); + row.add(originId); + row.add(task.destinationPointSetKeys[d]); + row.add(Integer.toString(task.percentiles[p])); + // One column containing dual accessibility value + double[] densitiesPerMinute = percentilesForDestPointset[p]; + int m = 0; + double sum = 0; + // Find smallest integer M such that we have already reached D destinations after M minutes of travel. + while (sum < dualThreshold && m < 120) { + sum += densitiesPerMinute[m]; + m += 1; + } + // -1 indicates the threshold number of opportunities had still not been reached after the highest + // travel time cutoff specified in the analysis. + row.add(Integer.toString(m >= 120 ? -1 : m)); + // One density value for each of 120 one-minute bins. + // Column labeled 10 contains the number of opportunities reached after 10 to 11 minutes of travel. + for (m = 0; m < 120; m++) { + row.add(Double.toString(densitiesPerMinute[m])); + } + rows.add(row.toArray(new String[row.size()])); + } + } + return rows; + } + +} diff --git a/src/main/java/com/conveyal/data/census/TigerLineSource.java b/src/main/java/com/conveyal/data/census/TigerLineSource.java index 21a5834ac..3ba0b38bf 100644 --- a/src/main/java/com/conveyal/data/census/TigerLineSource.java +++ b/src/main/java/com/conveyal/data/census/TigerLineSource.java @@ -34,7 +34,7 @@ public void load (ShapeDataStore store) throws Exception { for (SimpleFeatureIterator it = sfc.features(); it.hasNext();) { GeobufFeature feat = new GeobufFeature(it.next()); feat.id = null; - feat.numericId = Long.parseLong((String) feat.properties.get("GEOID10")); + feat.numericId = Long.parseLong((String) feat.properties.get("GEOID20")); feat.properties = new HashMap<>(); store.add(feat); } diff --git a/src/main/java/com/conveyal/gtfs/error/SuspectStopLocationError.java b/src/main/java/com/conveyal/gtfs/error/SuspectStopLocationError.java new file mode 100644 index 000000000..ac2841eea --- /dev/null +++ b/src/main/java/com/conveyal/gtfs/error/SuspectStopLocationError.java @@ -0,0 +1,31 @@ +package com.conveyal.gtfs.error; + +import com.conveyal.gtfs.validator.model.Priority; + +import java.io.Serializable; + +/** + * Indicates that a stop is in a suspect location, for example in a place like a desert where there are not enough + * people to support public transit. This can be the result of incorrect coordinate transforms into WGS84. + * Stops are often located on "null island" at (0,0). This can also happen in other coordinate systems before they + * are transformed to WGS84: the origin of a common French coordinate system is in the Sahara. + */ +public class SuspectStopLocationError extends GTFSError implements Serializable { + public static final long serialVersionUID = 1L; + + public SuspectStopLocationError(String stopId, long line) { + super("stops", line, "stop_id", stopId); + } + + @Override public String getMessage() { + return String.format( + "Stop with ID %s is in a sparsely populated area (fewer than 5 inhabitants per square km in any " + + "neighboring 1/4 degree cell)", + affectedEntityId + ); + } + + @Override public Priority getPriority() { + return Priority.MEDIUM; + } +} diff --git a/src/main/java/com/conveyal/gtfs/model/Agency.java b/src/main/java/com/conveyal/gtfs/model/Agency.java index fd1e6031c..32c221ea4 100644 --- a/src/main/java/com/conveyal/gtfs/model/Agency.java +++ b/src/main/java/com/conveyal/gtfs/model/Agency.java @@ -39,7 +39,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { Agency a = new Agency(); - a.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + a.sourceFileLine = row; a.agency_id = getStringField("agency_id", false); // can only be absent if there is a single agency -- requires a special validator. a.agency_name = getStringField("agency_name", true); a.agency_url = getUrlField("agency_url", true); diff --git a/src/main/java/com/conveyal/gtfs/model/Calendar.java b/src/main/java/com/conveyal/gtfs/model/Calendar.java index 8ac72a000..74db9c8f8 100644 --- a/src/main/java/com/conveyal/gtfs/model/Calendar.java +++ b/src/main/java/com/conveyal/gtfs/model/Calendar.java @@ -55,7 +55,7 @@ public void loadOneRow() throws IOException { feed.errors.add(new DuplicateKeyError(tableName, row, "service_id", service_id)); } else { Calendar c = new Calendar(); - c.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + c.sourceFileLine = row; c.service_id = service.service_id; c.monday = getIntField("monday", true, 0, 1); c.tuesday = getIntField("tuesday", true, 0, 1); diff --git a/src/main/java/com/conveyal/gtfs/model/CalendarDate.java b/src/main/java/com/conveyal/gtfs/model/CalendarDate.java index db4a1e9f3..cd8b36053 100644 --- a/src/main/java/com/conveyal/gtfs/model/CalendarDate.java +++ b/src/main/java/com/conveyal/gtfs/model/CalendarDate.java @@ -56,7 +56,7 @@ public void loadOneRow() throws IOException { feed.errors.add(new DuplicateKeyError(tableName, row, "(service_id, date)", keyString)); } else { CalendarDate cd = new CalendarDate(); - cd.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + cd.sourceFileLine = row; cd.service_id = service_id; cd.date = date; cd.exception_type = getIntField("exception_type", true, 1, 2); diff --git a/src/main/java/com/conveyal/gtfs/model/Entity.java b/src/main/java/com/conveyal/gtfs/model/Entity.java index a2395b473..16431860b 100644 --- a/src/main/java/com/conveyal/gtfs/model/Entity.java +++ b/src/main/java/com/conveyal/gtfs/model/Entity.java @@ -85,7 +85,11 @@ public static abstract class Loader { protected final Set missingRequiredColumns = Sets.newHashSet(); protected CsvReader reader; - protected int row; + + // Use one-based rows which are easier to understand in error messages. + // Line numbers are conventionally one-based even in IDEs and programming editors. + protected int row = 1; + // TODO "String column" that is set before any calls to avoid passing around the column name public Loader(GTFSFeed feed, String tableName) { @@ -289,18 +293,22 @@ public void loadTable (ZipFile zip) throws IOException { } CsvReader reader = new CsvReader(inStream, ',', Charset.forName("UTF8")); this.reader = reader; + // row number is already positioned at 1 boolean hasHeaders = reader.readHeaders(); if (!hasHeaders) { feed.errors.add(new EmptyTableError(tableName)); } while (reader.readRecord()) { - // reader.getCurrentRecord() is zero-based and does not include the header line, keep our own row count - if (++row % 500000 == 0) { + // reader.getCurrentRecord() is zero-based and does not include the header line, + // so we keep our own one-based row count that does include the header line. + // Advance row number before calling loadOneRow so the current value is available inside that function. + row += 1; + if (row % 500000 == 0) { LOG.info("Record number {}", human(row)); } loadOneRow(); // Call subclass method to produce an entity from the current row. } - if (row == 0) { + if (row < 2) { feed.errors.add(new EmptyTableError(tableName)); } } diff --git a/src/main/java/com/conveyal/gtfs/model/FareAttribute.java b/src/main/java/com/conveyal/gtfs/model/FareAttribute.java index 9ea58bede..3803920e2 100644 --- a/src/main/java/com/conveyal/gtfs/model/FareAttribute.java +++ b/src/main/java/com/conveyal/gtfs/model/FareAttribute.java @@ -42,7 +42,7 @@ public void loadOneRow() throws IOException { feed.errors.add(new DuplicateKeyError(tableName, row, "fare_id", fareId)); } else { FareAttribute fa = new FareAttribute(); - fa.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + fa.sourceFileLine = row; fa.fare_id = fareId; fa.price = getDoubleField("price", true, 0, Integer.MAX_VALUE); fa.currency_type = getStringField("currency_type", true); diff --git a/src/main/java/com/conveyal/gtfs/model/FareRule.java b/src/main/java/com/conveyal/gtfs/model/FareRule.java index ce8b3c033..04cfdb7bb 100644 --- a/src/main/java/com/conveyal/gtfs/model/FareRule.java +++ b/src/main/java/com/conveyal/gtfs/model/FareRule.java @@ -43,7 +43,7 @@ public void loadOneRow() throws IOException { Fare fare = fares.computeIfAbsent(fareId, Fare::new); FareRule fr = new FareRule(); - fr.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + fr.sourceFileLine = row; fr.fare_id = fare.fare_id; fr.route_id = getStringField("route_id", false); fr.origin_id = getStringField("origin_id", false); diff --git a/src/main/java/com/conveyal/gtfs/model/FeedInfo.java b/src/main/java/com/conveyal/gtfs/model/FeedInfo.java index cfedca049..041a2f943 100644 --- a/src/main/java/com/conveyal/gtfs/model/FeedInfo.java +++ b/src/main/java/com/conveyal/gtfs/model/FeedInfo.java @@ -41,7 +41,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { FeedInfo fi = new FeedInfo(); - fi.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + fi.sourceFileLine = row; fi.feed_id = getStringField("feed_id", false); fi.feed_publisher_name = getStringField("feed_publisher_name", true); fi.feed_publisher_url = getUrlField("feed_publisher_url", true); diff --git a/src/main/java/com/conveyal/gtfs/model/Frequency.java b/src/main/java/com/conveyal/gtfs/model/Frequency.java index e327224aa..558d7bc41 100644 --- a/src/main/java/com/conveyal/gtfs/model/Frequency.java +++ b/src/main/java/com/conveyal/gtfs/model/Frequency.java @@ -57,7 +57,7 @@ protected boolean isRequired() { public void loadOneRow() throws IOException { Frequency f = new Frequency(); Trip trip = getRefField("trip_id", true, feed.trips); - f.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + f.sourceFileLine = row; f.trip_id = trip.trip_id; f.start_time = getTimeField("start_time", true); f.end_time = getTimeField("end_time", true); diff --git a/src/main/java/com/conveyal/gtfs/model/Route.java b/src/main/java/com/conveyal/gtfs/model/Route.java index f4965861b..d6faf1fcf 100644 --- a/src/main/java/com/conveyal/gtfs/model/Route.java +++ b/src/main/java/com/conveyal/gtfs/model/Route.java @@ -51,7 +51,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { Route r = new Route(); - r.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + r.sourceFileLine = row; r.route_id = getStringField("route_id", true); Agency agency = getRefField("agency_id", false, feed.agency); diff --git a/src/main/java/com/conveyal/gtfs/model/ShapePoint.java b/src/main/java/com/conveyal/gtfs/model/ShapePoint.java index 904cb939b..e5a7e71d1 100644 --- a/src/main/java/com/conveyal/gtfs/model/ShapePoint.java +++ b/src/main/java/com/conveyal/gtfs/model/ShapePoint.java @@ -46,7 +46,7 @@ public void loadOneRow() throws IOException { double shape_dist_traveled = getDoubleField("shape_dist_traveled", false, 0D, Double.MAX_VALUE); ShapePoint s = new ShapePoint(shape_id, shape_pt_lat, shape_pt_lon, shape_pt_sequence, shape_dist_traveled); - s.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + s.sourceFileLine = row; feed.shape_points.put(new Tuple2(s.shape_id, s.shape_pt_sequence), s); } } diff --git a/src/main/java/com/conveyal/gtfs/model/Stop.java b/src/main/java/com/conveyal/gtfs/model/Stop.java index 26a5fabb3..16790051b 100644 --- a/src/main/java/com/conveyal/gtfs/model/Stop.java +++ b/src/main/java/com/conveyal/gtfs/model/Stop.java @@ -45,7 +45,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { Stop s = new Stop(); - s.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + s.sourceFileLine = row; s.stop_id = getStringField("stop_id", true); s.stop_code = getStringField("stop_code", false); s.stop_name = getStringField("stop_name", true); diff --git a/src/main/java/com/conveyal/gtfs/model/StopTime.java b/src/main/java/com/conveyal/gtfs/model/StopTime.java index daabfec14..31d5d9159 100644 --- a/src/main/java/com/conveyal/gtfs/model/StopTime.java +++ b/src/main/java/com/conveyal/gtfs/model/StopTime.java @@ -50,7 +50,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { StopTime st = new StopTime(); - st.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + st.sourceFileLine = row; st.trip_id = getStringField("trip_id", true); // TODO: arrival_time and departure time are not required, but if one is present the other should be // also, if this is the first or last stop, they are both required diff --git a/src/main/java/com/conveyal/gtfs/model/Transfer.java b/src/main/java/com/conveyal/gtfs/model/Transfer.java index 56066c373..3af7b970b 100644 --- a/src/main/java/com/conveyal/gtfs/model/Transfer.java +++ b/src/main/java/com/conveyal/gtfs/model/Transfer.java @@ -31,7 +31,7 @@ protected boolean isRequired() { @Override public void loadOneRow() throws IOException { Transfer tr = new Transfer(); - tr.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + tr.sourceFileLine = row; tr.from_stop_id = getStringField("from_stop_id", true); tr.to_stop_id = getStringField("to_stop_id", true); tr.transfer_type = getIntField("transfer_type", true, 0, 3); @@ -48,6 +48,7 @@ public void loadOneRow() throws IOException { getRefField("from_trip_id", false, feed.trips); getRefField("to_trip_id", false, feed.trips); + // row number used as an arbitrary unique string to give MapDB a key. feed.transfers.put(Long.toString(row), tr); } diff --git a/src/main/java/com/conveyal/gtfs/model/Trip.java b/src/main/java/com/conveyal/gtfs/model/Trip.java index d0a16380e..f1f85e184 100644 --- a/src/main/java/com/conveyal/gtfs/model/Trip.java +++ b/src/main/java/com/conveyal/gtfs/model/Trip.java @@ -40,7 +40,7 @@ protected boolean isRequired() { public void loadOneRow() throws IOException { Trip t = new Trip(); - t.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index + t.sourceFileLine = row; t.route_id = getStringField("route_id", true); t.service_id = getStringField("service_id", true); t.trip_id = getStringField("trip_id", true); diff --git a/src/main/java/com/conveyal/gtfs/storage/BooleanAsciiGrid.java b/src/main/java/com/conveyal/gtfs/storage/BooleanAsciiGrid.java index 91293671e..f7f0c8045 100644 --- a/src/main/java/com/conveyal/gtfs/storage/BooleanAsciiGrid.java +++ b/src/main/java/com/conveyal/gtfs/storage/BooleanAsciiGrid.java @@ -9,7 +9,7 @@ /** * Loads an ESRI ASCII grid containing integers and allows looking up values as booleans (where > 0). - * This is used for + * This can be used for a basic stop location test using a simple population raster. */ public class BooleanAsciiGrid { @@ -51,19 +51,22 @@ public BooleanAsciiGrid (InputStream inputStream, boolean gzipped) { } /** - * Get a grid for places where population density is over 5 people per square kilometer. + * Get a grid for places where population density is over 5 people per square kilometer in any neighboring cell. * We use the Gridded Population of the World v3 data set for 2015 UN-adjusted population density. * This data set was downloaded at 1/4 degree resolution in ESRI ASCII grid format. The grid file was edited * manually to eliminate the no-data value header, since I could not find a way to operate on no-value cells in the * QGIS raster calculator. Then the raster calculator in QGIS was used with the formula ("glds00ag15@1" > 5), * which makes all cells with population density above the threshold have a value of one, - * and all others a value of zero (since the no data value in the grid is -9999). This was then exported as another - * ASCII grid file, which zips well. The license for this data set is Creative Commons Attribution. + * and all others a value of zero (since the no data value in the grid is -9999). Next, the GRASS r.neighbors tool + * in QGIS was used to blur this layer, adding to each cell the sum of the neighboring eight cells ("neighborhood + * size" of 3, the dimension in each direction). A final logical operation ("blurred@1" > 0) was applied, with the + * result exported as another ASCII grid file, which zips well. The license for this data set is Creative Commons + * Attribution. * See http://sedac.ciesin.columbia.edu/data/collection/gpw-v3 */ public static BooleanAsciiGrid forEarthPopulation() { try { - InputStream gridStream = BooleanAsciiGrid.class.getResourceAsStream("gpwv3-quarter-boolean.asc"); + InputStream gridStream = BooleanAsciiGrid.class.getResourceAsStream("gpwv3-quarter-buffer-boolean.asc"); return new BooleanAsciiGrid(gridStream, false); } catch (Exception ex) { throw new RuntimeException(ex); diff --git a/src/main/java/com/conveyal/gtfs/validator/PostLoadValidator.java b/src/main/java/com/conveyal/gtfs/validator/PostLoadValidator.java index 303bc3537..a4544703a 100644 --- a/src/main/java/com/conveyal/gtfs/validator/PostLoadValidator.java +++ b/src/main/java/com/conveyal/gtfs/validator/PostLoadValidator.java @@ -6,7 +6,9 @@ import com.conveyal.gtfs.error.GeneralError; import com.conveyal.gtfs.error.RangeError; import com.conveyal.gtfs.error.ReferentialIntegrityError; +import com.conveyal.gtfs.error.SuspectStopLocationError; import com.conveyal.gtfs.model.Stop; +import com.conveyal.gtfs.storage.BooleanAsciiGrid; import java.util.List; @@ -33,6 +35,7 @@ public PostLoadValidator (GTFSFeed feed) { public void validate () { validateCalendarServices(); validateParentStations(); + validateStopPopulationDensity(); } /** @@ -46,6 +49,20 @@ private void validateCalendarServices () { } } + /** + * Validate that stops are not in locations with no people. This can happen from incorrect coordinate transforms + * into WGS84. Stops are often located on "null island" at (0,0). This can also happen in other coordinate systems + * before they are transformed to WGS84: the origin of a common French coordinate system is in the Sahara. + */ + private void validateStopPopulationDensity () { + BooleanAsciiGrid popGrid = BooleanAsciiGrid.forEarthPopulation(); + for (Stop stop : feed.stops.values()) { + if (!(popGrid.getValueForCoords(stop.stop_lon, stop.stop_lat))) { + feed.errors.add(new SuspectStopLocationError(stop.stop_id, stop.sourceFileLine)); + } + } + } + /** * Validate location_type and parent_station constraints as well as referential integrity. * Individual validation actions like this could be factored out into separate classes (PostLoadValidators) diff --git a/src/main/java/com/conveyal/r5/OneOriginResult.java b/src/main/java/com/conveyal/r5/OneOriginResult.java index 6c721d41e..090cdd9a0 100644 --- a/src/main/java/com/conveyal/r5/OneOriginResult.java +++ b/src/main/java/com/conveyal/r5/OneOriginResult.java @@ -1,6 +1,7 @@ package com.conveyal.r5; import com.conveyal.r5.analyst.AccessibilityResult; +import com.conveyal.r5.analyst.TemporalDensityResult; import com.conveyal.r5.analyst.cluster.PathResult; import com.conveyal.r5.analyst.cluster.TravelTimeResult; @@ -20,10 +21,18 @@ public class OneOriginResult { public final PathResult paths; - public OneOriginResult(TravelTimeResult travelTimes, AccessibilityResult accessibility, PathResult paths) { + public final TemporalDensityResult density; + + public OneOriginResult( + TravelTimeResult travelTimes, + AccessibilityResult accessibility, + PathResult paths, + TemporalDensityResult density + ) { this.travelTimes = travelTimes; this.accessibility = accessibility; this.paths = paths; + this.density = density; } } diff --git a/src/main/java/com/conveyal/r5/analyst/FreeFormPointSet.java b/src/main/java/com/conveyal/r5/analyst/FreeFormPointSet.java index 4e9527be5..d0deaed13 100644 --- a/src/main/java/com/conveyal/r5/analyst/FreeFormPointSet.java +++ b/src/main/java/com/conveyal/r5/analyst/FreeFormPointSet.java @@ -251,8 +251,7 @@ public Envelope getWgsEnvelope () { public WebMercatorExtents getWebMercatorExtents () { final int DEFAULT_ZOOM = 9; Envelope wgsEnvelope = this.getWgsEnvelope(); - WebMercatorExtents webMercatorExtents = WebMercatorExtents.forWgsEnvelope(wgsEnvelope, DEFAULT_ZOOM); - return webMercatorExtents; + return WebMercatorExtents.forBufferedWgsEnvelope(wgsEnvelope, DEFAULT_ZOOM); } /** Construct a freeform point set containing one opportunity at each specified geographic coordinate. */ diff --git a/src/main/java/com/conveyal/r5/analyst/Grid.java b/src/main/java/com/conveyal/r5/analyst/Grid.java index 60bb526c6..ad9faf1ed 100644 --- a/src/main/java/com/conveyal/r5/analyst/Grid.java +++ b/src/main/java/com/conveyal/r5/analyst/Grid.java @@ -8,7 +8,6 @@ import com.csvreader.CsvReader; import com.google.common.io.LittleEndianDataInputStream; import com.google.common.io.LittleEndianDataOutputStream; -import org.apache.commons.math3.util.FastMath; import org.geotools.coverage.grid.GridCoverage2D; import org.geotools.coverage.grid.GridCoverageFactory; import org.geotools.coverage.grid.io.AbstractGridFormat; @@ -64,14 +63,17 @@ import static com.conveyal.gtfs.util.Util.human; import static com.conveyal.r5.common.GeometryUtils.checkWgsEnvelopeSize; -import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.base.Preconditions.checkState; import static java.lang.Double.parseDouble; -import static org.apache.commons.math3.util.FastMath.atan; -import static org.apache.commons.math3.util.FastMath.cos; -import static org.apache.commons.math3.util.FastMath.log; -import static org.apache.commons.math3.util.FastMath.sinh; -import static org.apache.commons.math3.util.FastMath.tan; +import static java.lang.Math.PI; +import static java.lang.Math.atan; +import static java.lang.Math.cos; +import static java.lang.Math.log; +import static java.lang.Math.pow; +import static java.lang.Math.sinh; +import static java.lang.Math.tan; +import static java.lang.Math.toDegrees; +import static java.lang.Math.toRadians; /** * Class that represents a grid of opportunity counts in the spherical Mercator "projection" at a given zoom level. @@ -122,7 +124,7 @@ public Grid (WebMercatorExtents extents) { * @param wgsEnvelope Envelope of grid, in absolute WGS84 lat/lon coordinates */ public Grid (int zoom, Envelope wgsEnvelope) { - this(WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom)); + this(WebMercatorExtents.forBufferedWgsEnvelope(wgsEnvelope, zoom)); } public static class PixelWeight { @@ -458,22 +460,30 @@ public int featureCount() { return extents.width * extents.height; } - /* functions below from http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Mathematics */ + /* Functions below derived from http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Mathematics */ + + /** Like lonToPixel but returns fractional values for positions within a pixel instead of integer pixel numbers. */ + public static double lonToFractionalPixel (double lon, int zoom) { + // Factor of 256 yields a pixel value rather than the tile number. + return (lon + 180) / 360 * Math.pow(2, zoom) * 256; + } /** - * Return the absolute (world) x pixel number of all pixels the given line of longitude falls within at the given - * zoom level. + * Return the absolute (world) x pixel number of all pixels containing the given line of longitude + * at the given zoom level. */ public static int lonToPixel (double lon, int zoom) { - return (int) ((lon + 180) / 360 * Math.pow(2, zoom) * 256); + return (int) lonToFractionalPixel(lon, zoom); } /** - * Return the longitude of the west edge of any pixel at the given zoom level and x pixel number measured from the - * west edge of the world (assuming an integer pixel). Noninteger pixels will return locations within that pixel. + * Given an integer web Mercator pixel number, return the longitude in degrees of the west edge of that pixel at + * the given zoom level measured from the west edge of the world (not relative to this grid or to any particular + * tile). Given a non-integer web Mercator pixel number, return WGS84 locations within that pixel. + * Naming should somehow be revised to clarify that it doesn't return the center of the pixel. */ public static double pixelToLon (double xPixel, int zoom) { - return xPixel / (Math.pow(2, zoom) * 256) * 360 - 180; + return xPixel / (pow(2, zoom) * 256) * 360 - 180; } /** @@ -484,27 +494,36 @@ public static double pixelToCenterLon (int xPixel, int zoom) { return pixelToLon(xPixel + 0.5, zoom); } + /** Like latToPixel but returns fractional values for positions within a pixel instead of integer pixel numbers. */ + public static double latToFractionalPixel (double lat, int zoom) { + final double latRad = toRadians(lat); + return (1 - log(tan(latRad) + 1 / cos(latRad)) / Math.PI) * Math.pow(2, zoom - 1) * 256; + } + /** Return the absolute (world) y pixel number of all pixels the given line of latitude falls within. */ public static int latToPixel (double lat, int zoom) { - double latRad = FastMath.toRadians(lat); - return (int) ((1 - log(tan(latRad) + 1 / cos(latRad)) / Math.PI) * Math.pow(2, zoom - 1) * 256); + return (int) latToFractionalPixel(lat, zoom); } /** - * Return the latitude of the center of all pixels at the given zoom level and absolute (world) y pixel number - * measured southward from the north edge of the world. + * Given an integer web Mercator pixel number, return the latitude in degrees of the north edge of that pixel at the + * given zoom level relative to the top (north) edge of the world (not relative to this grid or to any particular + * tile). Given a non-integer web Mercator pixel number, return WGS84 locations within that pixel. + * + * TODO Profile this some time because we had versions using both FastMath and built-in Math functions. + * The difference should be less significant these days. Java now has a StrictMath and the normal Math is optimized. */ - public static double pixelToCenterLat (int yPixel, int zoom) { - return pixelToLat(yPixel + 0.5, zoom); + public static double pixelToLat (double yPixel, int zoom) { + final double tile = yPixel / 256d; + return toDegrees(atan(sinh(PI - tile * PI * 2 / pow(2, zoom)))); } /** - * Return the latitude of the north edge of any pixel at the given zoom level and y coordinate relative to the top - * edge of the world (assuming an integer pixel). Noninteger pixels will return locations within the pixel. - * We're using FastMath here, because the built-in math functions were taking a large amount of time in profiling. + * Return the latitude of the center of all pixels at the given zoom level and absolute (world) y pixel number + * measured southward from the north edge of the world. */ - public static double pixelToLat (double yPixel, int zoom) { - return FastMath.toDegrees(atan(sinh(Math.PI - (yPixel / 256d) / Math.pow(2, zoom) * 2 * Math.PI))); + public static double pixelToCenterLat (int yPixel, int zoom) { + return pixelToLat(yPixel + 0.5, zoom); } /** @@ -604,7 +623,7 @@ public static List fromCsv(InputStreamProvider csvInputStreamProvider, reader.close(); checkWgsEnvelopeSize(envelope, "CSV points"); - WebMercatorExtents extents = WebMercatorExtents.forWgsEnvelope(envelope, zoom); + WebMercatorExtents extents = WebMercatorExtents.forBufferedWgsEnvelope(envelope, zoom); checkPixelCount(extents, numericColumns.size()); if (progressListener != null) { @@ -676,7 +695,7 @@ public static List fromShapefile (File shapefile, int zoom, ProgressListen ShapefileReader reader = new ShapefileReader(shapefile); Envelope envelope = reader.wgs84Bounds(); checkWgsEnvelopeSize(envelope, "Shapefile"); - WebMercatorExtents extents = WebMercatorExtents.forWgsEnvelope(envelope, zoom); + WebMercatorExtents extents = WebMercatorExtents.forBufferedWgsEnvelope(envelope, zoom); List numericAttributes = reader.numericAttributes(); Set uniqueNumericAttributes = new HashSet<>(numericAttributes); if (uniqueNumericAttributes.size() != numericAttributes.size()) { @@ -753,14 +772,12 @@ public double getOpportunityCount (int i) { } /** - * Rasterize a FreeFormFointSet into a Grid. - * Currently intended only for UI display of FreeFormPointSets, or possibly for previews of accessibility results - * during + * Rasterize a FreeFormFointSet into a Grid. Currently intended only for UI display of FreeFormPointSets. */ public static Grid fromFreeForm (FreeFormPointSet freeForm, int zoom) { // TODO make and us a strongly typed WgsEnvelope class here and in various places Envelope wgsEnvelope = freeForm.getWgsEnvelope(); - WebMercatorExtents webMercatorExtents = WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + WebMercatorExtents webMercatorExtents = WebMercatorExtents.forBufferedWgsEnvelope(wgsEnvelope, zoom); Grid grid = new Grid(webMercatorExtents); grid.name = freeForm.name; for (int f = 0; f < freeForm.featureCount(); f++) { diff --git a/src/main/java/com/conveyal/r5/analyst/GridTransformWrapper.java b/src/main/java/com/conveyal/r5/analyst/GridTransformWrapper.java index ddc5fcec5..1bc265c0e 100644 --- a/src/main/java/com/conveyal/r5/analyst/GridTransformWrapper.java +++ b/src/main/java/com/conveyal/r5/analyst/GridTransformWrapper.java @@ -37,8 +37,8 @@ public GridTransformWrapper (WebMercatorExtents targetGridExtents, Grid sourceGr // This could certainly be made more efficient (but complex) by forcing sequential iteration over opportunity counts // and disallowing random access, using a new PointSetIterator class that allows reading lat, lon, and counts. private int transformIndex (int i) { - final int x = (i % targetGrid.width) + targetGrid.west - sourceGrid.extents.west; - final int y = (i / targetGrid.width) + targetGrid.north - sourceGrid.extents.north; + final int x = (i % targetGrid.extents.width) + targetGrid.extents.west - sourceGrid.extents.west; + final int y = (i / targetGrid.extents.width) + targetGrid.extents.north - sourceGrid.extents.north; if (x < 0 || x >= sourceGrid.extents.width || y < 0 || y >= sourceGrid.extents.height) { // Point in target grid lies outside source grid, there is no valid index. Return special value. return -1; diff --git a/src/main/java/com/conveyal/r5/analyst/IsochroneFeature.java b/src/main/java/com/conveyal/r5/analyst/IsochroneFeature.java deleted file mode 100644 index 893f20624..000000000 --- a/src/main/java/com/conveyal/r5/analyst/IsochroneFeature.java +++ /dev/null @@ -1,392 +0,0 @@ -package com.conveyal.r5.analyst; - -import com.conveyal.r5.common.GeometryUtils; -import com.google.common.collect.HashMultimap; -import com.google.common.collect.Multimap; -import org.locationtech.jts.geom.Coordinate; -import org.locationtech.jts.geom.LinearRing; -import org.locationtech.jts.geom.MultiPolygon; -import org.locationtech.jts.geom.Polygon; -import org.locationtech.jts.simplify.TopologyPreservingSimplifier; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -import java.io.File; -import java.io.FileWriter; -import java.io.Serializable; -import java.util.ArrayList; -import java.util.Arrays; -import java.util.Collection; -import java.util.Comparator; -import java.util.List; -import java.util.Map; -import java.util.stream.Collectors; - -/** - * This is similar to the IsochroneData class in OTP, and in fact for compatibility can be serialized to JSON and - * deserialized as such. However it uses a completely different algorithm. - * - * Although we have another separate implementaion of the marching squares contour line algorithm in Javascript, - * we're holding on to this one in case we need an R5 server to generate vector isochrones itself. - */ -public class IsochroneFeature implements Serializable { - private static final Logger LOG = LoggerFactory.getLogger(IsochroneFeature.class); - - private static final long serialVersionUID = 1L; - - // maximum number of vertices in a ring - public static final int MAX_RING_SIZE = 25000; - - /** The minimum ring size (to get rid of small rings). Should be at least 4 to ensure all rings are valid */ - public static final int MIN_RING_SIZE = 12; - - public MultiPolygon geometry; - public int cutoffSec; - - public IsochroneFeature () { /* deserialization */ } - - /** - * Create an isochrone for the given cutoff, using a Marching Squares algorithm. - * https://en.wikipedia.org/wiki/Marching_squares - */ - public IsochroneFeature (int cutoffSec, WebMercatorGridPointSet points, int[] times) { - // slightly hacky, but simple: set all of the times around the edges of the pointset to MAX_VALUE so that - // the isochrone never runs off the edge of the display. - // first, protective copy - times = Arrays.copyOf(times, times.length); - - for (int x = 0; x < points.width; x++) { - times[x] = Integer.MAX_VALUE; - times[(int) ((points.height - 1) * points.width) + x] = Integer.MAX_VALUE; - } - - for (int y = 0; y < points.height; y++) { - times[(int) points.width * y] = Integer.MAX_VALUE; - times[(int) points.width * (y + 1) - 1] = Integer.MAX_VALUE; - } - - LOG.debug("Making isochrone for {}sec", cutoffSec); - this.cutoffSec = cutoffSec; - // make contouring grid - byte[][] contour = new byte[(int) points.width - 1][(int) points.height - 1]; - for (int y = 0; y < points.height - 1; y++) { - for (int x = 0; x < points.width - 1; x++) { - boolean topLeft = times[(int) (points.width * y + x)] < cutoffSec; - boolean topRight = times[(int) (points.width * y + x + 1)] < cutoffSec; - boolean botLeft = times[(int) (points.width * (y + 1) + x)] < cutoffSec; - boolean botRight = times[(int) (points.width * (y + 1) + x + 1)] < cutoffSec; - - byte idx = 0; - - // TODO saddle points. Do we care? - - if (topLeft) idx |= 1 << 3; - if (topRight) idx |= 1 << 2; - if (botRight) idx |= 1 << 1; - if (botLeft) idx |= 1; - - contour[x][y] = idx; - } - } - - // create a geometry. For now not doing linear interpolation. Find a cell a line crosses through and - // follow that line. - List outerRings = new ArrayList<>(); - List innerRings = new ArrayList<>(); - boolean[][] found = new boolean[(int) points.width - 1][(int) points.height - 1]; - - for (int origy = 0; origy < points.height - 1; origy++) { - for (int origx = 0; origx < points.width - 1; origx++) { - int x = origx; - int y = origy; - - if (found[x][y]) continue; - - byte idx = contour[x][y]; - - // can't start at a saddle we don't know which way it goes - if (idx == 0 || idx == 5 || idx == 10 || idx == 15) continue; - - byte prevIdx = -1; - - List ring = new ArrayList<>(); - - // keep track of clockwise/counterclockwise orientation, see http://stackoverflow.com/questions/1165647 - int direction = 0; - // skip empty cells - int prevy = 0, prevx = 0; - Coordinate prevCoord = null; - CELLS: - while (true) { - idx = contour[x][y]; - - // check for intersecting rings, but know that saddles are supposed to self-intersect. - if (found[x][y] && idx != 5 && idx != 10) { - LOG.error("Ring crosses another ring (possibly itself). This cell has index {}, the previous cell has index {}.", idx, prevIdx); - break CELLS; - } - - found[x][y] = true; - - // follow line, keeping unfilled area to the left, which determines a direction - // this also means that we'll be able to figure out if something is a hole by - // the winding direction. - if (ring.size() >= MAX_RING_SIZE) { - LOG.error("Ring is too large, bailing"); - break CELLS; - } - - // save x values here, the next iteration may need to know what they were before we messed with them - // NB no bounds checking is performed below, but the next iteration of the loop will try to access contour[x][y] which - // will serve as a bounds check. - int startx = x; - int starty = y; - switch (idx) { - case 0: - LOG.error("Ran off outside of ring"); - break CELLS; - case 1: - x--; - break; - // NB: +y is down - case 2: - y++; - break; - case 3: - x--; - break; - case 4: - x++; - break; - case 5: - if (prevy > y) - // came from bottom - x++; - else if (prevy < y) - // came from top - x--; - else - LOG.error("Entered case 5 saddle point from wrong direction!"); - break; - case 6: - y++; - break; - case 7: - x--; - break; - case 8: - y--; - break; - case 9: - y--; - break; - case 10: - if (prevx < x) - // came from left - y++; - else if (prevx > x) - // came from right - y--; - else { - LOG.error("Entered case 10 saddle point from wrong direction."); - } - break; - case 11: - y--; - break; - case 12: - x++; - break; - case 13: - x++; - break; - case 14: - y++; - break; - case 15: - LOG.error("Ran off inside of ring"); - break CELLS; - } - - // figure out from whence we came - int topLeftTime = times[(int) points.width * y + x]; - int botLeftTime = times[(int) points.width * (y + 1) + x]; - int topRightTime = times[(int) points.width * y + x + 1]; - int botRightTime = times[(int) points.width * (y + 1) + x + 1]; - - double lat, lon; - - if (startx < x) { - // came from left - // will always be positive, if numerator is negative denominator will be as well. - double frac = (cutoffSec - topLeftTime) / (double) (botLeftTime - topLeftTime); - lat = points.pixelToLat(points.north + y + frac); - lon = points.pixelToLon(points.west + x); - } - else if (startx > x) { - // came from right - double frac = (cutoffSec - topRightTime) / (double) (botRightTime - topRightTime); - lat = points.pixelToLat(points.north + y + frac); - lon = points.pixelToLon(points.west + x + 1); - } - else if (starty < y) { - // came from top - double frac = (cutoffSec - topLeftTime) / (double) (topRightTime - topLeftTime); - lat = points.pixelToLat(points.north + y); - lon = points.pixelToLon(points.west + x + frac); - } - else { - // came from bottom - double frac = (cutoffSec - botLeftTime) / (botRightTime - botLeftTime); - lat = points.pixelToLat(points.north + y + 1); - lon = points.pixelToLon(points.west + x + frac); - } - - // keep track of winding direction - // http://stackoverflow.com/questions/1165647 - direction += (x - startx) * (y + starty); - - prevCoord = new Coordinate(lon, lat); - ring.add(prevCoord); - - // this shouldn't happen - if (x == startx && y == starty) { - LOG.error("Ring position did not update"); - break CELLS; - } - - // pass previous values to next iteration - prevIdx = idx; - prevx = startx; - prevy = starty; - - if (x == origx && y == origy) { - Coordinate end = ring.get(0); - ring.add(end); - - if (ring.size() > MIN_RING_SIZE) { - LinearRing lr = GeometryUtils.geometryFactory.createLinearRing(ring.toArray(new Coordinate[ring.size()])); - // direction less than 0 means clockwise (NB the y-axis is backwards), since value is to left it is an outer ring - if (direction > 0) { - // simplify so point in polygon test is tractable - lr = (LinearRing) TopologyPreservingSimplifier.simplify(lr, 1e-3); - outerRings.add(lr); - } else { - innerRings.add(lr); - } - } - - break CELLS; - } - } - } - } - - LOG.debug("{} components", outerRings.size()); - - Multimap holesForRing = HashMultimap.create(); - - // create polygons so we can test containment - Map polygonsForOuterRing = outerRings.stream().collect(Collectors.toMap( - r -> r, - r -> GeometryUtils.geometryFactory.createPolygon(r) - )); - - Map polygonsForInnerRing = innerRings.stream().collect(Collectors.toMap( - r -> r, - r -> GeometryUtils.geometryFactory.createPolygon(r) - )); - - // put the biggest ring first because most holes are in the biggest ring, reduces number of point in polygon tests below - outerRings.sort(Comparator.comparing(ring -> polygonsForOuterRing.get(ring).getArea()).reversed()); - - // get rid of tiny shells - - - LOG.info("Found {} outer rings and {} inner rings for cutoff {}m", polygonsForOuterRing.size(), polygonsForInnerRing.size(), cutoffSec / 60); - - int holeIdx = -1; - HOLES: for (Map.Entry hole : polygonsForInnerRing.entrySet()) { - holeIdx++; - - // get rid of tiny holes - if (hole.getValue().getArea() < 1e-6) continue; - - for (LinearRing ring : outerRings) { - // fine to test membership of first coordinate only since shells and holes are disjoint, and holes - // nest completely in shells - if (polygonsForOuterRing.get(ring).contains(hole.getKey().getPointN(0))) { - holesForRing.put(ring, hole.getKey()); - continue HOLES; - } - } - - LOG.warn("Found no fitting shell for isochrone hole {} at cutoff {}, dropping this hole.", holeIdx, cutoffSec); - } - - Polygon[] polygons = outerRings.stream().map(shell -> { - Collection holes = holesForRing.get(shell); - return GeometryUtils.geometryFactory.createPolygon(shell, holes.toArray(new LinearRing[holes.size()])); - }).toArray(s -> new Polygon[s]); - - // first geometry has to be an outer ring, but there may be multiple outer rings - this.geometry = GeometryUtils.geometryFactory.createMultiPolygon(polygons); - - LOG.debug("Done."); - } - - /** - * Debug code to draw an ascii-art isochrone. - */ - public void dumpContourGrid (byte[][] contour, String out) throws Exception { - FileWriter sb = new FileWriter(new File(out)); - for (int y = 0; y < contour[0].length; y++) { - for (int x = 0; x < contour.length; x++) { - switch(contour[x][y]) { - case 0: - sb.append(" "); - break; - case 15: - sb.append("XX"); - break; - case 1: - case 14: - sb.append("\\ "); - break; - case 2: - case 13: - sb.append(" /"); - break; - case 3: - case 12: - sb.append("--"); - break; - case 4: - case 11: - sb.append(" \\"); - break; - case 5: - sb.append("//"); - break; - case 10: - sb.append("\\\\"); - break; - case 6: - case 9: - sb.append("| "); - break; - case 7: - case 8: - sb.append("/ "); - break; - default: - sb.append("**"); - - } - } - sb.append("\n"); - } - - sb.close(); - } -} diff --git a/src/main/java/com/conveyal/r5/analyst/LinkageCache.java b/src/main/java/com/conveyal/r5/analyst/LinkageCache.java index 8ded0a681..0bc7b7738 100644 --- a/src/main/java/com/conveyal/r5/analyst/LinkageCache.java +++ b/src/main/java/com/conveyal/r5/analyst/LinkageCache.java @@ -95,7 +95,7 @@ public LinkedPointSet load(Key key) { key.streetLayer, key.streetMode ); - if (basePointSetLinkage != null && basePointSet.zoom == keyPointSet.zoom) { + if (basePointSetLinkage != null && basePointSet.extents.zoom == keyPointSet.extents.zoom) { LOG.info("Cutting linkage for {} out of existing linkage for {}.", keyPointSet, basePointSet); return new LinkedPointSet(basePointSetLinkage, keyPointSet); } diff --git a/src/main/java/com/conveyal/r5/analyst/TemporalDensityResult.java b/src/main/java/com/conveyal/r5/analyst/TemporalDensityResult.java new file mode 100644 index 000000000..6ba2294b4 --- /dev/null +++ b/src/main/java/com/conveyal/r5/analyst/TemporalDensityResult.java @@ -0,0 +1,96 @@ +package com.conveyal.r5.analyst; + +import com.conveyal.r5.analyst.cluster.AnalysisWorkerTask; +import com.google.common.base.Preconditions; + +import static com.conveyal.r5.common.Util.notNullOrEmpty; +import static com.conveyal.r5.profile.FastRaptorWorker.UNREACHED; + +/** + * An instance of this is included in a OneOriginResult for reporting how many opportunities are encountered during each + * minute of travel. If we use more than one destination point set they are already constrained to all be aligned with + * the same number of destinations. + * + * The data retained here feed into three different kinds of results: "Dual" accessibility (the number of opportunities + * reached in a given number of minutes of travel time); temporal opportunity density (analogous to a probability density + * function, how many opportunities are encountered during each minute of travel, whose integral is the cumulative + * accessibility curve). + * + * Originally this class was tracking the identity of the N nearest points rather than just binning them by travel time. + * This is more efficient in cases where N is small, and allows retaining the one-second resolution. However currently + * there does not seem to be much demand among users for this level of detail, so it has been removed in the interest + * of simplicity and maintainability. See issue 884 for more comments on implementation trade-offs. + */ +public class TemporalDensityResult { + + // Internal state fields + + private final PointSet[] destinationPointSets; + private final int nPercentiles; + private final int opportunityThreshold; + + // Externally visible fields for accumulating results + + /** + * The temporal density of opportunities. For each destination set, for each percentile, for each minute of + * travel m from 0 to 119, the number of opportunities reached in travel times from m (inclusive) to m+1 + * (exclusive). + */ + public final double[][][] opportunitiesPerMinute; + + public TemporalDensityResult(AnalysisWorkerTask task) { + Preconditions.checkArgument( + notNullOrEmpty(task.destinationPointSets), + "Dual accessibility requires at least one destination pointset." + ); + this.destinationPointSets = task.destinationPointSets; + this.nPercentiles = task.percentiles.length; + this.opportunityThreshold = task.dualAccessibilityThreshold; + this.opportunitiesPerMinute = new double[destinationPointSets.length][nPercentiles][120]; + } + + public void recordOneTarget (int target, int[] travelTimePercentilesSeconds) { + // Increment histogram bin for the number of minutes of travel by the number of opportunities at the target. + for (int d = 0; d < destinationPointSets.length; d++) { + PointSet dps = destinationPointSets[d]; + for (int p = 0; p < nPercentiles; p++) { + if (travelTimePercentilesSeconds[p] == UNREACHED) { + break; // If any percentile is unreached, all higher ones are also unreached. + } + int m = travelTimePercentilesSeconds[p] / 60; + if (m < 120) { + opportunitiesPerMinute[d][p][m] += dps.getOpportunityCount(target); + } + } + } + } + + /** + * Calculate "dual" accessibility from the accumulated temporal opportunity density array. + * @param n the threshold quantity of opportunities + * @return the minimum whole number of minutes necessary to reach n opportunities, + * for each destination set and percentile of travel time. + */ + public int[][] minutesToReachOpportunities(int n) { + int[][] result = new int[destinationPointSets.length][nPercentiles]; + for (int d = 0; d < destinationPointSets.length; d++) { + for (int p = 0; p < nPercentiles; p++) { + result[d][p] = -1; + double count = 0; + for (int m = 0; m < 120; m++) { + count += opportunitiesPerMinute[d][p][m]; + if (count >= n) { + result[d][p] = m + 1; + break; + } + } + } + } + return result; + } + + public int[][] minutesToReachOpportunities() { + return minutesToReachOpportunities(opportunityThreshold); + } + +} diff --git a/src/main/java/com/conveyal/r5/analyst/TravelTimeComputer.java b/src/main/java/com/conveyal/r5/analyst/TravelTimeComputer.java index b9f20a701..6af5dbcf7 100644 --- a/src/main/java/com/conveyal/r5/analyst/TravelTimeComputer.java +++ b/src/main/java/com/conveyal/r5/analyst/TravelTimeComputer.java @@ -30,6 +30,7 @@ import static com.conveyal.r5.analyst.scenario.PickupWaitTimes.NO_SERVICE_HERE; import static com.conveyal.r5.analyst.scenario.PickupWaitTimes.NO_WAIT_ALL_STOPS; +import static com.conveyal.r5.common.Util.isNullOrEmpty; import static com.conveyal.r5.profile.PerTargetPropagater.MM_PER_METER; /** @@ -77,19 +78,19 @@ public OneOriginResult computeTravelTimes() { // Find the set of destinations for a travel time calculation, not yet linked to the street network, and with // no associated opportunities. By finding the extents and destinations up front, we ensure the exact same - // destination pointset is used for all steps below. + // destination PointSet is used for all steps below. // This reuses the logic for finding the appropriate grid size and linking, which is now in the NetworkPreloader. // We could change the preloader to retain these values in a compound return type, to avoid repetition here. PointSet destinations; - if (request instanceof RegionalTask && !request.makeTauiSite && request.destinationPointSets[0] instanceof FreeFormPointSet ) { - // Freeform; destination pointset was set by handleOneRequest in the main AnalystWorker + // Freeform destinations. Destination PointSet was set by handleOneRequest in the main AnalystWorker. destinations = request.destinationPointSets[0]; } else { - // Gridded (non-freeform) destinations. The extents are found differently in regional and single requests. + // Gridded (non-freeform) destinations. This method finds them differently for regional and single requests. + // We don't support freeform destinations for single point requests, as they must also return gridded travel times. WebMercatorExtents destinationGridExtents = request.getWebMercatorExtents(); // Make a WebMercatorGridPointSet with the right extents, referring to the network's base grid and linkage. destinations = AnalysisWorkerTask.gridPointSetCache.get(destinationGridExtents, network.fullExtentGridPointSet); diff --git a/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java b/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java index 4e1ca30bc..213091d56 100644 --- a/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java +++ b/src/main/java/com/conveyal/r5/analyst/TravelTimeReducer.java @@ -46,6 +46,9 @@ public class TravelTimeReducer { /** Retains the paths to one or all destinations, for recording in CSV or reporting in the UI. */ private PathResult pathResult = null; + /** Represents how many destinations are reached in each minute of travel from this origin. */ + private TemporalDensityResult temporalDensityResult = null; + /** If we are calculating accessibility, the PointSets containing opportunities. */ private PointSet[] destinationPointSets; @@ -121,6 +124,8 @@ public TravelTimeReducer (AnalysisWorkerTask task, TransportNetwork network) { this.destinationPointSets = task.destinationPointSets; if (task instanceof TravelTimeSurfaceTask) { calculateTravelTimes = true; + // In single-point analyses, destination pointsets may be missing if the user has not selected one in the + // UI, or if the user has selected the step decay function instead of one of the other decay functions. calculateAccessibility = notNullOrEmpty(task.destinationPointSets); } else { // Maybe we should define recordAccessibility and recordTimes on the common superclass AnalysisWorkerTask. @@ -140,6 +145,9 @@ public TravelTimeReducer (AnalysisWorkerTask task, TransportNetwork network) { if (task.includePathResults) { pathResult = new PathResult(task, network.transitLayer); } + if (task.includeTemporalDensity) { + temporalDensityResult = new TemporalDensityResult(task); + } // Validate and copy the travel time cutoffs, converting them to seconds to avoid repeated multiplication // in tight loops. Also find the points where the decay function reaches zero for these cutoffs. @@ -271,6 +279,9 @@ private void recordTravelTimePercentilesForTarget (int target, int[] travelTimeP } } } + if (temporalDensityResult != null) { + temporalDensityResult.recordOneTarget(target, travelTimePercentilesSeconds); + } } /** @@ -329,12 +340,14 @@ private int convertToMinutes (int timeSeconds) { * origin point is not connected to the street network. */ public OneOriginResult finish () { - return new OneOriginResult(travelTimeResult, accessibilityResult, pathResult); + return new OneOriginResult(travelTimeResult, accessibilityResult, pathResult, temporalDensityResult); } /** * Sanity check: all opportunity data sets should have the same size and location as the points to which we'll * calculate travel times. They will only be used if we're calculating accessibility. + * TODO: expand to cover all cases where destinationPointSets are present, not just accessibility to Mercator grids. + * Need to verify first: should this be skipped for one-to-one regional requests on FreeFormPointSets? */ public void checkOpportunityExtents (PointSet travelTimePointSet) { if (calculateAccessibility) { diff --git a/src/main/java/com/conveyal/r5/analyst/WebMercatorExtents.java b/src/main/java/com/conveyal/r5/analyst/WebMercatorExtents.java index 0d75a79ca..2be5d515a 100644 --- a/src/main/java/com/conveyal/r5/analyst/WebMercatorExtents.java +++ b/src/main/java/com/conveyal/r5/analyst/WebMercatorExtents.java @@ -8,10 +8,15 @@ import org.locationtech.jts.geom.Envelope; import org.opengis.referencing.crs.CoordinateReferenceSystem; +import java.io.Serializable; import java.util.Arrays; +import static com.conveyal.r5.analyst.Grid.latToFractionalPixel; import static com.conveyal.r5.analyst.Grid.latToPixel; +import static com.conveyal.r5.analyst.Grid.lonToFractionalPixel; import static com.conveyal.r5.analyst.Grid.lonToPixel; +import static com.conveyal.r5.analyst.Grid.pixelToLat; +import static com.conveyal.r5.analyst.Grid.pixelToLon; import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.base.Preconditions.checkElementIndex; import static com.google.common.base.Preconditions.checkNotNull; @@ -25,10 +30,15 @@ * and OpportunityGrid (AKA Grid) which adds opportunity counts. These can compose, not necessarily subclass. * Of course they could all be one class, with the opportunity grid nulled out when there is no density. */ -public class WebMercatorExtents { +public class WebMercatorExtents implements Serializable { - private static final int MIN_ZOOM = 9; - private static final int MAX_ZOOM = 12; + /** + * Default Web Mercator zoom level for grids (origin/destination layers, aggregation area masks, etc.). + * Level 10 is probably ideal but will quadruple calculation relative to 9. + */ + public static final int DEFAULT_ZOOM = 9; + public static final int MIN_ZOOM = 9; + public static final int MAX_ZOOM = 12; private static final int MAX_GRID_CELLS = 5_000_000; /** The pixel number of the westernmost pixel (smallest x value). */ @@ -94,6 +104,12 @@ public static WebMercatorExtents forPointsets (PointSet[] pointSets) { } } + public static int parseZoom(String zoomString) { + int zoom = (zoomString == null) ? DEFAULT_ZOOM : Integer.parseInt(zoomString); + checkArgument(zoom >= MIN_ZOOM && zoom <= MAX_ZOOM); + return zoom; + } + /** * Create the minimum-size immutable WebMercatorExtents containing both this one and the other one. * Note that WebMercatorExtents fields are immutable, and this method does not modify the instance in place. @@ -114,23 +130,94 @@ public WebMercatorExtents expandToInclude (WebMercatorExtents other) { return new WebMercatorExtents(outWest, outNorth, outWidth, outHeight, this.zoom); } + /** + * Construct a WebMercatorExtents that contains all the points inside the supplied WGS84 envelope. + * The logic here is designed to handle the case where the edges of the WGS84 envelope exactly coincide with the + * edges of the web Mercator grid. For example, if the right edge is exactly on the border of pixels with x + * number 3 and 4, and the left edge is exactly on the border of pixels with x number 2 and 3, the resulting + * WebMercatorExtents should only include pixels with x number 3. This case arises when the WGS84 envelope was + * itself derived from a block of web Mercator pixels. + * + * Note that this does not handle numerical instability or imprecision in repeated floating point calculations on + * envelopes, where WGS84 coordinates are intended to yield exact integer web Mercator coordinates but do not. + * Such imprecision is handled by wrapper factory methods (by shrinking or growing the envelope by some epsilon). + * The real solution would be to always specify origin grids in integer form, but our current API does not allow this. + */ public static WebMercatorExtents forWgsEnvelope (Envelope wgsEnvelope, int zoom) { - /* - The grid extent is computed from the points. If the cell number for the right edge of the grid is rounded - down, some points could fall outside the grid. `latToPixel` and `lonToPixel` naturally truncate down, which is - the correct behavior for binning points into cells but means the grid is (almost) always 1 row too - narrow/short, so we add 1 to the height and width when a grid is created in this manner. The exception is - when the envelope edge lies exactly on a pixel boundary. For this reason we should probably not produce WGS - Envelopes that exactly align with pixel edges, but they should instead surround the points at pixel centers. - Note also that web Mercator coordinates increase from north to south, so minimum latitude is maximum y. - TODO maybe use this method when constructing Grids. Grid (int zoom, Envelope envelope) - */ + // Conversion of WGS84 to web Mercator pixels truncates intra-pixel coordinates toward the origin (northwest). + // Note that web Mercator coordinates increase from north to south, so maximum latitude is minimum Mercator y. int north = latToPixel(wgsEnvelope.getMaxY(), zoom); int west = lonToPixel(wgsEnvelope.getMinX(), zoom); - int height = (latToPixel(wgsEnvelope.getMinY(), zoom) - north) + 1; // minimum height is 1 - int width = (lonToPixel(wgsEnvelope.getMaxX(), zoom) - west) + 1; // minimum width is 1 - WebMercatorExtents webMercatorExtents = new WebMercatorExtents(west, north, width, height, zoom); - return webMercatorExtents; + // Find width and height in whole pixels, handling the case where the right envelope edge is on a pixel edge. + int height = (int) Math.ceil(latToFractionalPixel(wgsEnvelope.getMinY(), zoom) - north); + int width = (int) Math.ceil(lonToFractionalPixel(wgsEnvelope.getMaxX(), zoom) - west); + // These extents are constructed to contain some objects, and they have integer sizes (whole Mercator pixels). + // Therefore they should always have positive nonzero integer width and height. + checkState(width >= 1, "Web Mercator extents should always have a width of one or more."); + checkState(height >= 1, "Web Mercator extents should always have a height of one or more."); + return new WebMercatorExtents(west, north, width, height, zoom); + } + + /** + * For function definitions below to work, this epsilon must be (significantly) less than half the height or + * width of a web Mercator pixel at the highest zoom level and highest latitude allowed by the system. + * Current value is about 1 meter north-south, but east-west distance is higher at higher latitudes. + */ + private static final double WGS_EPSILON = 0.00001; + + /** + * Wrapper to forWgsEnvelope where the envelope is trimmed uniformly by only a meter or two in each direction. This + * helps handle lack of numerical precision where floating point math is intended to yield integers and envelopes + * that exactly line up with Mercator grid edges (though the latter is also handled by the main constructor). + * + * Without this trimming, when receiving an envelope that's supposed to lie on integer web Mercator pixel + * boundaries, a left or top edge coordinate may end up the tiniest bit below the intended integer and be + * truncated all the way down to the next lower pixel number. A bottom or right edge coordinate that ends up a tiny + * bit above the intended integer will tack a whole row of pixels onto the grid. Neither of these are horrible in + * isolation (the grid is just one pixel bigger than absolutely necessary) but when applied repeatedly, as when + * basing one analysis on another in a chain, the grid will grow larger and larger, yielding mismatched result grids. + * + * I originally attempted to handle this with lat/lonToPixel functions that would snap to pixel edges, but the + * snapping needs to pull in different directions on different edges of the envelope. Just transforming the envelope + * by trimming it slightly is simpler and has the intended effect. + * + * Trimming is not appropriate in every use case. If you have an envelope that's a tight fit around a set of points + * (opportunities) and the left edge of that envelope is within the trimming distance of a web Mercator pixel edge, + * those opportunities will be outside the resulting WebMercatorExtents. When preparing grids intended to contain + * a set of points, it is probably better to deal with numerical imprecision by expanding the envelope slightly + * instead of contracting it. A separate method is supplied for this purpose. + */ + public static WebMercatorExtents forTrimmedWgsEnvelope (Envelope wgsEnvelope, int zoom) { + checkArgument(wgsEnvelope.getWidth() > 3 * WGS_EPSILON, "Envelope is too narrow."); + checkArgument(wgsEnvelope.getHeight() > 3 * WGS_EPSILON, "Envelope is too short."); + // Shrink a protective copy of the envelope slightly. Note the negative sign, this is shrinking the envelope. + wgsEnvelope = wgsEnvelope.copy(); + wgsEnvelope.expandBy(-WGS_EPSILON); + return WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + } + + /** + * The opposite of forTrimmedWgsEnvelope: makes the envelope a tiny bit bigger before constructing the extents. + * This helps deal with numerical imprecision where we want to be sure all points within a supplied envelope will + * fall inside cells of the resulting web Mercator grid. + */ + public static WebMercatorExtents forBufferedWgsEnvelope (Envelope wgsEnvelope, int zoom) { + // Expand a protective copy of the envelope slightly. + wgsEnvelope = wgsEnvelope.copy(); + wgsEnvelope.expandBy(WGS_EPSILON); + return WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + } + + /** + * Produces a new Envelope in WGS84 coordinates that tightly encloses the pixels of this WebMercatorExtents. + * The edges of that Envelope will run exactly down the borders between neighboring web Mercator pixels. + */ + public Envelope toWgsEnvelope () { + double westLon = pixelToLon(west, zoom); + double northLat = pixelToLat(north, zoom); + double eastLon = pixelToLon(west + width, zoom); + double southLat = pixelToLat(north + height, zoom); + return new Envelope(westLon, eastLon, southLat, northLat); } @Override diff --git a/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSet.java b/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSet.java index b6b614df7..692b75851 100644 --- a/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSet.java +++ b/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSet.java @@ -10,6 +10,12 @@ import java.io.Serializable; +import static com.conveyal.r5.analyst.Grid.latToPixel; +import static com.conveyal.r5.analyst.Grid.lonToPixel; +import static com.conveyal.r5.analyst.Grid.pixelToCenterLat; +import static com.conveyal.r5.analyst.Grid.pixelToCenterLon; +import static com.conveyal.r5.analyst.Grid.pixelToLat; +import static com.conveyal.r5.analyst.Grid.pixelToLon; import static com.conveyal.r5.common.GeometryUtils.checkWgsEnvelopeSize; import static com.conveyal.r5.streets.VertexStore.fixedDegreesToFloating; import static com.google.common.base.Preconditions.checkArgument; @@ -23,49 +29,27 @@ public class WebMercatorGridPointSet extends PointSet implements Serializable { public static final Logger LOG = LoggerFactory.getLogger(WebMercatorGridPointSet.class); - /** - * Default Web Mercator zoom level for grids (origin/destination layers, aggregation area masks, etc.). - * Level 10 is probably ideal but will quadruple calculation relative to 9. - */ - public static final int DEFAULT_ZOOM = 9; - - public static final int MIN_ZOOM = 9; - - public static final int MAX_ZOOM = 12; - - /** web mercator zoom level */ - public final int zoom; - - /** westernmost pixel */ - public final int west; - - /** northernmost pixel */ - public final int north; - - /** The number of pixels across this grid in the east-west direction. */ - public final int width; - - /** The number of pixels from top to bottom of this grid in the north-south direction. */ - public final int height; + public final WebMercatorExtents extents; /** Base pointset; linkages will be shared with this pointset */ public final WebMercatorGridPointSet basePointSet; /** * Create a new WebMercatorGridPointSet. - * * @oaram basePointSet the super-grid pointset from which linkages will be copied or shared, or null if no * such grid exists. */ - public WebMercatorGridPointSet(int zoom, int west, int north, int width, int height, WebMercatorGridPointSet basePointSet) { - this.zoom = zoom; - this.west = west; - this.north = north; - this.width = width; - this.height = height; + public WebMercatorGridPointSet(WebMercatorExtents extents, WebMercatorGridPointSet basePointSet) { + // All fields of extents are final, no need to make a protective copy. + this.extents = extents; this.basePointSet = basePointSet; } + /** The resulting PointSet will not have a null basePointSet, so should generally not be used for linking. */ + public WebMercatorGridPointSet (WebMercatorExtents extents) { + this(extents, null); + } + /** * Constructs a grid point set that covers the entire extent of the supplied transport network's street network. * This usually serves as the base supergrid pointset for other smaller grids in the same region. @@ -76,31 +60,20 @@ public WebMercatorGridPointSet (TransportNetwork transportNetwork) { /** * TODO specific data types for Web Mercator and WGS84 floating point envelopes - * @param wgsEnvelope an envelope in floating-point WGS84 degrees + * @param wgsEnvelope an envelope in floating-point WGS84 degrees. The envelope will be expanded ever so slightly + * to ensure any objects within it are sure to fall within the resulting mercator extents, even + * if subject to loss of precision during later coordinate calculations. */ public WebMercatorGridPointSet (Envelope wgsEnvelope) { LOG.info("Creating WebMercatorGridPointSet with WGS84 extents {}", wgsEnvelope); checkWgsEnvelopeSize(wgsEnvelope, "grid point set"); - this.zoom = DEFAULT_ZOOM; - int west = lonToPixel(wgsEnvelope.getMinX()); - int east = lonToPixel(wgsEnvelope.getMaxX()); - int north = latToPixel(wgsEnvelope.getMaxY()); - int south = latToPixel(wgsEnvelope.getMinY()); - this.west = west; - this.north = north; - this.height = south - north; - this.width = east - west; + this.extents = WebMercatorExtents.forBufferedWgsEnvelope(wgsEnvelope, WebMercatorExtents.DEFAULT_ZOOM); this.basePointSet = null; } - /** The resulting PointSet will not have a null basePointSet, so should generally not be used for linking. */ - public WebMercatorGridPointSet (WebMercatorExtents extents) { - this(extents.zoom, extents.west, extents.north, extents.width, extents.height, null); - } - @Override public int featureCount() { - return height * width; + return extents.height * extents.width; } @Override @@ -111,91 +84,46 @@ public double sumTotalOpportunities () { @Override public double getLat(int i) { - long y = i / this.width + this.north; - return pixelToLat(y); + final int y = i / extents.width + extents.north; + return pixelToCenterLat(y, extents.zoom); } @Override public double getLon(int i) { - long x = i % this.width + this.west; - return pixelToLon(x); + final int x = i % extents.width + extents.west; + return pixelToCenterLon(x, extents.zoom); } @Override public TIntList getPointsInEnvelope (Envelope envelopeFixedDegrees) { // Convert fixed-degree envelope to floating, then to world-scale web Mercator pixels at this grid's zoom level. // This is not very DRY since we do something very similar in the constructor and elsewhere. - int west = lonToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMinX())); - int east = lonToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMaxX())); - int north = latToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMaxY())); - int south = latToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMinY())); + // These are the integer pixel numbers containing the envelope, so iteration below must be inclusive of the max. + final int z = extents.zoom; + int west = lonToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMinX()), z); + int east = lonToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMaxX()), z); + int north = latToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMaxY()), z); + int south = latToPixel(fixedDegreesToFloating(envelopeFixedDegrees.getMinY()), z); // Make the envelope's pixel values relative to the edges of this WebMercatorGridPointSet, rather than // absolute world-scale coordinates at this zoom level. - west -= this.west; - east -= this.west; - north -= this.north; - south -= this.north; + west -= extents.west; + east -= extents.west; + north -= extents.north; + south -= extents.north; TIntList pointsInEnvelope = new TIntArrayList(); // Pixels are truncated toward zero, and coords increase toward East and South in web Mercator, so <= south/east. for (int y = north; y <= south; y++) { - if (y < 0 || y >= this.height) continue; + if (y < 0 || y >= extents.height) continue; for (int x = west; x <= east; x++) { - if (x < 0 || x >= this.width) continue; + if (x < 0 || x >= extents.width) continue; // Calculate the 1D (flattened) index into this pointset for the grid cell at (x,y). - int pointIndex = y * this.width + x; + int pointIndex = y * extents.width + x; pointsInEnvelope.add(pointIndex); } } return pointsInEnvelope; } - // http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Mathematics - - /** - * Return the x pixel number containing the given longitude at this grid's zoom level, relative to the left edge - * of the world (not relative to this grid or to any particular tile). - * TODO This method could be reusable and static if zoom level was a parameter. And moved to WebMercatorExtents. - */ - public int lonToPixel (double lon) { - // factor of 256 is to get a pixel value not a tile number - return (int) ((lon + 180) / 360 * Math.pow(2, zoom) * 256); - } - - /** - * Return the y pixel number containing the given latitude at this grid's zoom level, relative to the top edge of - * the world (not relative to this grid or to any particular tile). - * TODO This method could be reusable and static if zoom level was a parameter. And moved to WebMercatorExtents. - */ - public int latToPixel (double lat) { - double invCos = 1 / Math.cos(Math.toRadians(lat)); - double tan = Math.tan(Math.toRadians(lat)); - double ln = Math.log(tan + invCos); - return (int) ((1 - ln / Math.PI) * Math.pow(2, zoom - 1) * 256); - } - - /** - * Return the longitude in degrees of the west edge of any pixel at the specified x coordinate relative to the left - * edge of the world (not relative to this grid or to any particular tile), at this grid's zoom level. - * TODO This method could be reusable and static if zoom level was a parameter. - * It should probably also be renamed to clarify that it doesn't return the center of the pixel. - * Another equivalent method is found in Grid, and should probably be merged with this one and WebMercatorExtents. - */ - public double pixelToLon (double x) { - return x / (Math.pow(2, zoom) * 256) * 360 - 180; - } - - /** - * Return the latitude in degrees of the north edge of any pixel at the specified y coordinate relative to the top - * edge of the world (not relative to this grid or to any particular tile), at this grid's zoom level. - * TODO This method could be reusable and static if zoom level was a parameter. - * It should probably also be renamed to clarify that it doesn't return the center of the pixel. - * Another equivalent method is found in Grid, and should probably be merged with this one and WebMercatorExtents. - */ - public double pixelToLat (double y) { - double tile = y / 256d; - return Math.toDegrees(Math.atan(Math.sinh(Math.PI - tile * Math.PI * 2 / Math.pow(2, zoom)))); - } - @Override public double getOpportunityCount (int i) { // FIXME just counting the points for now, return counts @@ -205,8 +133,8 @@ public double getOpportunityCount (int i) { //@Override // TODO add this to the PointSet interface public String getPointId (int i) { - int y = i / this.width; - int x = i % this.width; + int y = i / extents.width; + int x = i % extents.width; return x + "," + y; } @@ -215,14 +143,17 @@ public int getPointIndexContaining (Coordinate latLon) { } public int getPointIndexContaining (double lon, double lat) { - int x = lonToPixel(lon) - west; - int y = latToPixel(lat) - north; - return y * width + x; + int x = lonToPixel(lon, extents.zoom) - extents.west; + int y = latToPixel(lat, extents.zoom) - extents.north; + return y * extents.width + x; } @Override - public String toString () { - return "WebMercatorGridPointSet{" + "zoom=" + zoom + ", west=" + west + ", north=" + north + ", width=" + width + ", height=" + height + ", basePointSet=" + basePointSet + '}'; + public String toString() { + return "WebMercatorGridPointSet{" + + "extents=" + extents + + ", basePointSet=" + basePointSet + + '}'; } @Override @@ -232,13 +163,8 @@ public Envelope getWgsEnvelope () { @Override public WebMercatorExtents getWebMercatorExtents () { - return new WebMercatorExtents(west, north, width, height, zoom); - } - - public static int parseZoom(String zoomString) { - int zoom = (zoomString == null) ? DEFAULT_ZOOM : Integer.parseInt(zoomString); - checkArgument(zoom >= MIN_ZOOM && zoom <= MAX_ZOOM); - return zoom; + // WebMercatorExtents are immutable so we can return this without making a protective copy. + return extents; } } diff --git a/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSetCache.java b/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSetCache.java index 50caf408a..ccb11db51 100644 --- a/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSetCache.java +++ b/src/main/java/com/conveyal/r5/analyst/WebMercatorGridPointSetCache.java @@ -16,6 +16,7 @@ * subsequent tasks. * * Alternatively PointSets could have semantic equality, but current design is that just the keys and extents do. + * Freeform pointsets can be quite big so comparing them semantically is expected to be inefficient in the worst case. * * This cache is not serialized anywhere. For now it's created fresh when the worker starts up and held in a * static field for the life of the worker. It is primed upon receiving the first request. @@ -24,52 +25,41 @@ public class WebMercatorGridPointSetCache { private Map cache = new ConcurrentHashMap<>(); - public WebMercatorGridPointSet get (int zoom, int west, int north, int width, int height, WebMercatorGridPointSet base) { - GridKey key = new GridKey(); - key.zoom = zoom; - key.west = west; - key.north = north; - key.width = width; - key.height = height; - key.base = base; - + public WebMercatorGridPointSet get(WebMercatorExtents extents, WebMercatorGridPointSet base) { + GridKey key = new GridKey(extents, base); // This works even in a multithreaded environment; ConcurrentHashMap's contract specifies that this will // be called at most once per key. So ConcurrentHashMap could probably replace a lot of our LoadingCaches. return cache.computeIfAbsent(key, GridKey::toPointset); } - public WebMercatorGridPointSet get(WebMercatorExtents extents, WebMercatorGridPointSet base) { - return get(extents.zoom, extents.west, extents.north, extents.width, extents.height, base); - } - /** - * TODO make this GridKey a subclass of WebMercatorGridExtents or compose them. + * This is essentially a WebMercatorGridPointSet without the PointSet implementation methods and with semantic + * equality on the extents, for looking up single WebMercatorGridPointSet instances (which like all PointSets + * have identity equality). */ private static class GridKey { - public int zoom; - public int west; - public int north; - public int width; - public int height; - public WebMercatorGridPointSet base; + + public final WebMercatorExtents extents; + public final WebMercatorGridPointSet base; + + public GridKey(WebMercatorExtents extents, WebMercatorGridPointSet base) { + // All fields of extents are final, no need to make a protective copy. + this.extents = extents; + this.base = base; + } public WebMercatorGridPointSet toPointset () { - return new WebMercatorGridPointSet(zoom, west, north, width, height, base); + return new WebMercatorGridPointSet(extents, base); } public int hashCode () { - return west + north * 31 + width * 63 + height * 99 + (base == null ? 0 : base.hashCode() * 123); + return extents.hashCode() + (base == null ? 0 : base.hashCode() * 123); } public boolean equals (Object o) { if (o instanceof GridKey) { GridKey other = (GridKey) o; - return zoom == other.zoom && - west == other.west && - north == other.north && - width == other.width && - height == other.height && - base == other.base; + return extents.equals(other.extents) && (base == other.base); } else { return false; } diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorker.java b/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorker.java index aad7da99d..2add61702 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorker.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorker.java @@ -13,6 +13,7 @@ import com.conveyal.r5.analyst.TravelTimeComputer; import com.conveyal.r5.analyst.error.TaskError; import com.conveyal.r5.common.JsonUtilities; +import com.conveyal.r5.transit.TransitLayer; import com.conveyal.r5.transit.TransportNetwork; import com.conveyal.r5.transit.TransportNetworkCache; import com.conveyal.r5.transitive.TransitiveNetwork; @@ -75,8 +76,10 @@ public interface Config { private static final Logger LOG = LoggerFactory.getLogger(AnalysisWorker.class); - public static final int POLL_WAIT_SECONDS = 15; - public static final int POLL_MAX_RANDOM_WAIT = 5; + private static final int POLL_INTERVAL_MIN_SECONDS = 1; + private static final int POLL_INTERVAL_MAX_SECONDS = 15; + private static final int POLL_JITTER_SECONDS = 5; + private static final int QUEUE_SLOTS_PER_PROCESSOR = 8; /** * This timeout should be longer than the longest expected worker calculation for a single-point request. @@ -111,8 +114,6 @@ public interface Config { /** Keeps some TransportNetworks around, lazy-loading or lazy-building them. */ public final NetworkPreloader networkPreloader; - private final Random random = new Random(); - /** The common root of all API URLs contacted by this worker, e.g. http://localhost:7070/api/ */ protected final String brokerBaseUrl; @@ -126,8 +127,11 @@ public interface Config { */ private final List workResults = new ArrayList<>(); - /** The last time (in milliseconds since the epoch) that we polled for work. */ - private long lastPollingTime; + /** + * The last time (in milliseconds since the epoch) that we polled for work. + * The initial value of zero causes the worker to poll the backend immediately on startup avoiding a delay. + */ + private long lastPollingTime = 0; /** Keep track of how many tasks per minute this worker is processing, broken down by scenario ID. */ private final ThroughputTracker throughputTracker = new ThroughputTracker(); @@ -162,7 +166,7 @@ public static HttpClient makeHttpClient () { /** * A queue to hold a backlog of regional analysis tasks. - * This avoids "slow joiner" syndrome where we wait to poll for more work until all N fetched tasks have finished, + * This avoids "slow joiner" syndrome where we wait until all N fetched tasks have finished, * but one of the tasks takes much longer than all the rest. * This should be long enough to hold all that have come in - we don't need to block on polling the manager. * Can this be replaced with the general purpose TaskScheduler component? @@ -199,66 +203,100 @@ public AnalysisWorker ( /** The main worker event loop which fetches tasks from a broker and schedules them for execution. */ public void startPolling () { - // Create executors with up to one thread per processor. - // The default task rejection policy is "Abort". - // The executor's queue is rather long because some tasks complete very fast and we poll max once per second. + // Create an executor with one thread per processor. The default task rejection policy is "Abort". + // The number of threads will only increase from the core pool size toward the max pool size when the queue is + // full. We no longer exceed the queue length in normal operation, so the thread pool will remain at core size. + // "[The] core pool size is the threshold beyond which [an] executor service prefers to queue up the task + // [rather] than spawn a new thread." https://stackoverflow.com/a/72684387/778449 + // The executor's queue is rather long because some tasks complete very fast and we poll at most once per second. int availableProcessors = Runtime.getRuntime().availableProcessors(); - LOG.debug("Java reports the number of available processors is: {}", availableProcessors); - int maxThreads = availableProcessors; - int taskQueueLength = availableProcessors * 6; - LOG.debug("Maximum number of regional processing threads is {}, length of task queue is {}.", maxThreads, taskQueueLength); + LOG.info("Java reports the number of available processors is: {}", availableProcessors); + final int maxThreads = availableProcessors; + final int taskQueueLength = availableProcessors * QUEUE_SLOTS_PER_PROCESSOR; + LOG.info("Maximum number of regional processing threads is {}, target length of task queue is {}.", maxThreads, taskQueueLength); BlockingQueue taskQueue = new LinkedBlockingQueue<>(taskQueueLength); - regionalTaskExecutor = new ThreadPoolExecutor(1, maxThreads, 60, TimeUnit.SECONDS, taskQueue); + regionalTaskExecutor = new ThreadPoolExecutor(maxThreads, maxThreads, 60, TimeUnit.SECONDS, taskQueue); - // Main polling loop to fill the regional work queue. + // This is the main polling loop that fills the regional work queue. // Go into an endless loop polling for regional tasks that can be computed asynchronously. // You'd think the ThreadPoolExecutor could just block when the blocking queue is full, but apparently // people all over the world have been jumping through hoops to try to achieve this simple behavior // with no real success, at least without writing bug and deadlock-prone custom executor services. - // Two alternative approaches are trying to keep the queue full and waiting for the queue to be almost empty. - // To keep the queue full, we repeatedly try to add each task to the queue, pausing and retrying when - // it's full. To wait until it's almost empty, we could use wait() in a loop and notify() as tasks are handled. - // see https://stackoverflow.com/a/15185004/778449 - // A simpler approach might be to spin-wait checking whether the queue is low and sleeping briefly, - // then fetch more work only when the queue is getting empty. + // Our current (revised) approach is to slowly spin-wait, checking whether the queue is low and sleeping briefly, + // then fetching more work only when the queue is getting empty. + + // Allows slowing down polling when not actively receiving tasks. + boolean receivedWorkLastTime = false; + + // Before first polling the broker, randomly wait a few seconds to spread load when many workers start at once. + sleepSeconds((new Random()).nextInt(POLL_JITTER_SECONDS)); while (true) { - List tasks = getSomeWork(); - if (tasks == null || tasks.isEmpty()) { - // Either there was no work, or some kind of error occurred. - // Sleep for a while before polling again, adding a random component to spread out the polling load. - // TODO only randomize delay on the first round, after that it's excessive. - int randomWait = random.nextInt(POLL_MAX_RANDOM_WAIT); - LOG.debug("Polling the broker did not yield any regional tasks. Sleeping {} + {} sec.", POLL_WAIT_SECONDS, randomWait); - sleepSeconds(POLL_WAIT_SECONDS + randomWait); + // We establish a lower limit on the wait time between polling to avoid flooding the broker with requests. + // If worker handles all tasks in its internal queue in less than this time, this is a speed bottleneck. + // This can happen in areas unconnected to transit and when travel time cutoffs are very low. + sleepSeconds(POLL_INTERVAL_MIN_SECONDS); + // Determine whether to poll this cycle - is the queue running empty, or has the maximum interval passed? + { + long currentTime = System.currentTimeMillis(); + boolean maxIntervalExceeded = (currentTime - lastPollingTime) > (POLL_INTERVAL_MAX_SECONDS * 1000); + int tasksInQueue = taskQueue.size(); + // Poll any time we have less tasks in the queue than processors. + boolean shouldPoll = maxIntervalExceeded || (receivedWorkLastTime && (tasksInQueue < availableProcessors)); + LOG.debug("Last polled {} sec ago. Task queue length is {}.", (currentTime - lastPollingTime)/1000, taskQueue.size()); + if (!shouldPoll) { + continue; + } + lastPollingTime = currentTime; + } + // This will request tasks even when queue is rather full. + // For now, assume more but smaller task and result chunks is better at leveling broker load. + int tasksToRequest = taskQueue.remainingCapacity(); + // Alternatively: Only request tasks when queue is short. Otherwise, only report results and status. + // int tasksToRequest = (tasksInQueue < minQueueLength) ? taskQueue.remainingCapacity() : 0; + + List tasks = getSomeWork(tasksToRequest); + boolean noWorkReceived = tasks == null || tasks.isEmpty(); + receivedWorkLastTime = !noWorkReceived; // Allows variable speed polling on the next iteration. + if (noWorkReceived) { + // Either the broker supplied no work or an error occurred. continue; } for (RegionalTask task : tasks) { - // Try to enqueue each task for execution, repeatedly failing until the queue is not full. - // The list of fetched tasks essentially serves as a secondary queue, which is awkward. This is using - // exceptions for normal flow control, which is nasty. We should do this differently (#596). - while (true) { - try { - // TODO define non-anonymous runnable class to instantiate here, specifically for async regional tasks. - regionalTaskExecutor.execute(() -> { - try { - this.handleOneRegionalTask(task); - } catch (Throwable t) { - LOG.error( - "An error occurred while handling a regional task, reporting to backend. {}", - ExceptionUtils.stackTraceString(t) - ); - synchronized (workResults) { - workResults.add(new RegionalWorkResult(t, task)); - } - } - }); - break; - } catch (RejectedExecutionException e) { - // Queue is full, wait a bit and try to feed it more tasks. If worker handles all tasks in its - // internal queue in less than 1 second, this is a speed bottleneck. This happens with regions - // unconnected to transit and with very small travel time cutoffs. - sleepSeconds(1); - } + // Executor services require blocking queues of fixed length. Tasks must be enqueued one by one, and + // may fail with a RejectedExecutionException if we exceed the queue length. We choose queue length + // and requested number of tasks carefully to avoid overfilling the queue, but should handle the + // exceptions just in case something is misconfigured. + try { + regionalTaskExecutor.execute(new RegionalTaskRunnable(task)); + } catch (RejectedExecutionException e) { + LOG.error("Regional task could not be enqueued for processing (queue length exceeded). Task dropped."); + } + } + } + } + + /** + * Runnable inner class which can access the needed methods on AnalysisWorker (handleOneRegionalTask). + * However that method is only called from these runnables - it could potentially be inlined into run(). + */ + protected class RegionalTaskRunnable implements Runnable { + RegionalTask task; + + public RegionalTaskRunnable(RegionalTask task) { + this.task = task; + } + + @Override + public void run() { + try { + handleOneRegionalTask(task); + } catch (Throwable t) { + LOG.error( + "An error occurred while handling a regional task, reporting to backend. {}", + ExceptionUtils.stackTraceString(t) + ); + synchronized (workResults) { + workResults.add(new RegionalWorkResult(t, task)); } } } @@ -344,10 +382,10 @@ private byte[] singlePointResultToBinary ( timeGridWriter.writeToDataOutput(new LittleEndianDataOutputStream(byteArrayOutputStream)); addJsonToGrid( byteArrayOutputStream, - oneOriginResult.accessibility, + oneOriginResult, transportNetwork.scenarioApplicationWarnings, transportNetwork.scenarioApplicationInfo, - oneOriginResult.paths != null ? new PathResultSummary(oneOriginResult.paths, transportNetwork.transitLayer) : null + transportNetwork.transitLayer ); } // Single-point tasks don't have a job ID. For now, we'll categorize them by scenario ID. @@ -457,7 +495,7 @@ protected void handleOneRegionalTask (RegionalTask task) throws Throwable { // progress. This avoids crashing the backend by sending back massive 2 million element travel times // that have already been written to S3, and throwing exceptions on old backends that can't deal with // null AccessibilityResults. - oneOriginResult = new OneOriginResult(null, new AccessibilityResult(task), null); + oneOriginResult = new OneOriginResult(null, new AccessibilityResult(task), null, null); } // Accumulate accessibility results, which will be returned to the backend in batches. @@ -489,6 +527,8 @@ public static class GridJsonBlock { public PathResultSummary pathSummaries; + public double[][][] opportunitiesPerMinute; + @Override public String toString () { return String.format( @@ -508,24 +548,33 @@ public String toString () { * and no serious errors, we use a success error code. * TODO distinguish between warnings and errors - we already distinguish between info and warnings. * This could be turned into a GridJsonBlock constructor, with the JSON writing code in an instance method. + * Note that this is very similar to the RegionalWorkResult constructor, and some duplication of logic could be + * achieved by somehow merging the two. */ public static void addJsonToGrid ( OutputStream outputStream, - AccessibilityResult accessibilityResult, + OneOriginResult oneOriginResult, List scenarioApplicationWarnings, List scenarioApplicationInfo, - PathResultSummary pathResult + TransitLayer transitLayer // Only used if oneOriginResult contains paths, can be null otherwise ) throws IOException { var jsonBlock = new GridJsonBlock(); jsonBlock.scenarioApplicationInfo = scenarioApplicationInfo; jsonBlock.scenarioApplicationWarnings = scenarioApplicationWarnings; - if (accessibilityResult != null) { - // Due to the application of distance decay functions, we may want to make the shift to non-integer - // accessibility values (especially for cases where there are relatively few opportunities across the whole - // study area). But we'd need to control the number of decimal places serialized into the JSON. - jsonBlock.accessibility = accessibilityResult.getIntValues(); + if (oneOriginResult != null) { + if (oneOriginResult.accessibility != null) { + // Due to the application of distance decay functions, we may want to make the shift to non-integer + // accessibility values (especially for cases where there are relatively few opportunities across the whole + // study area). But we'd need to control the number of decimal places serialized into the JSON. + jsonBlock.accessibility = oneOriginResult.accessibility.getIntValues(); + } + if (oneOriginResult.paths != null) { + jsonBlock.pathSummaries = new PathResultSummary(oneOriginResult.paths, transitLayer); + } + if (oneOriginResult.density != null) { + jsonBlock.opportunitiesPerMinute = oneOriginResult.density.opportunitiesPerMinute; + } } - jsonBlock.pathSummaries = pathResult; LOG.debug("Travel time surface written, appending {}.", jsonBlock); // We could do this when setting up the Spark handler, supplying writeValue as the response transformer // But then you also have to handle the case where you are returning raw bytes. @@ -539,10 +588,13 @@ public static void addJsonToGrid ( * Also returns any accumulated work results to the backend. * @return a list of work tasks, or null if there was no work to do, or if no work could be fetched. */ - public List getSomeWork () { + public List getSomeWork (int tasksToRequest) { + LOG.debug("Polling backend to report status and request up to {} tasks.", tasksToRequest); String url = brokerBaseUrl + "/poll"; HttpPost httpPost = new HttpPost(url); WorkerStatus workerStatus = new WorkerStatus(this); + workerStatus.maxTasksRequested = tasksToRequest; + workerStatus.pollIntervalSeconds = POLL_INTERVAL_MAX_SECONDS; // Include all completed work results when polling the backend. // Atomically copy and clear the accumulated work results, while blocking writes from other threads. synchronized (workResults) { @@ -552,7 +604,7 @@ public List getSomeWork () { // Compute throughput in tasks per minute and include it in the worker status report. // We poll too frequently to compute throughput just since the last poll operation. - // TODO reduce polling frequency (larger queue in worker), compute shorter-term throughput. + // We may want to reduce polling frequency (with larger queue in worker) and compute shorter-term throughput. workerStatus.tasksPerMinuteByJobId = throughputTracker.getTasksPerMinuteByJobId(); // Report how often we're polling for work, just for monitoring. @@ -573,8 +625,10 @@ public List getSomeWork () { // Broker returned some work. Use the lenient object mapper to decode it in case the broker is a // newer version so sending unrecognizable fields. // ReadValue closes the stream, releasing the HTTP connection. - return JsonUtilities.lenientObjectMapper.readValue(responseEntity.getContent(), - new TypeReference>() {}); + return JsonUtilities.lenientObjectMapper.readValue( + responseEntity.getContent(), + new TypeReference>() {} + ); } // Non-200 response code or a null entity. Something is weird. LOG.error("Unsuccessful polling. HTTP response code: " + response.getStatusLine().getStatusCode()); diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorkerTask.java b/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorkerTask.java index d1e88f78c..30266f171 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorkerTask.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/AnalysisWorkerTask.java @@ -99,6 +99,20 @@ public abstract class AnalysisWorkerTask extends ProfileRequest { */ public boolean includePathResults = false; + /** + * Whether to include the number of opportunities reached during each minute of travel in results sent back + * to the broker. Requires both an origin and destination pointset to be specified, and in the case of regional + * analyses the origins must be non-gridded, and results will be collated to CSV. + * It should be possible to enable regional results for gridded origins as well. + */ + public boolean includeTemporalDensity = false; + + /** + * If this is set to a value above zero, report the amount of time needed to reach the given number of + * opportunities from this origin (known technically as "dual accessibility"). + */ + public int dualAccessibilityThreshold = 0; + /** Whether to build a histogram of travel times to each destination, generally used in testing and debugging. */ public boolean recordTravelTimeHistograms = false; @@ -200,6 +214,12 @@ of travel time (e.g. waiting) and paths should also be returned. REGIONAL_ANALYSIS } + /** + * WARNING This whole tree of classes contains non-primitive compound fields. Cloning WILL NOT DEEP COPY these + * fields. Modifying some aspects of the cloned object may modify the same aspects of the one it was cloned from. + * Unfortunately these classes have a large number of fields and maintaining hand written copy constructors for + * them might be an even greater liability than carefully choosing how to use clone(). + */ public AnalysisWorkerTask clone () { // no need to catch CloneNotSupportedException, it's caught in ProfileRequest::clone return (AnalysisWorkerTask) super.clone(); diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/PathResult.java b/src/main/java/com/conveyal/r5/analyst/cluster/PathResult.java index 7d523c4e4..c2366ac1a 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/PathResult.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/PathResult.java @@ -38,7 +38,7 @@ public class PathResult { * These results are returned to the backend over an HTTP API so we don't want to risk making them too huge. * This could be set to a higher number in cases where you know the result return channel can handle the size. */ - public static int maxDestinations = 5000; + public static final int MAX_PATH_DESTINATIONS = 5_000; private final int nDestinations; /** @@ -49,7 +49,7 @@ public class PathResult { public final Multimap[] iterationsForPathTemplates; private final TransitLayer transitLayer; - public static String[] DATA_COLUMNS = new String[]{ + public static final String[] DATA_COLUMNS = new String[]{ "routes", "boardStops", "alightStops", @@ -70,8 +70,8 @@ public PathResult(AnalysisWorkerTask task, TransitLayer transitLayer) { // In regional analyses, return paths to all destinations nDestinations = task.nTargetsPerOrigin(); // This limitation reflects the initial design, for use with freeform pointset destinations - if (nDestinations > maxDestinations) { - throw new UnsupportedOperationException("Number of detailed path destinations exceeds limit of " + maxDestinations); + if (nDestinations > MAX_PATH_DESTINATIONS) { + throw new UnsupportedOperationException("Number of detailed path destinations exceeds limit of " + MAX_PATH_DESTINATIONS); } } iterationsForPathTemplates = new Multimap[nDestinations]; diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/RegionalTask.java b/src/main/java/com/conveyal/r5/analyst/cluster/RegionalTask.java index c972057f8..0a444f9aa 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/RegionalTask.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/RegionalTask.java @@ -46,7 +46,8 @@ public class RegionalTask extends AnalysisWorkerTask implements Cloneable { public boolean oneToOne = false; /** - * Whether to record travel times between origins and destinations + * Whether to record travel times between origins and destinations. This is done automatically for + * TravelTimeSurfaceTask (single point tasks) but must be manually enabled on RegionalTasks using this field. */ public boolean recordTimes; @@ -80,6 +81,12 @@ public WebMercatorExtents getWebMercatorExtents() { } } + /** + * WARNING This whole tree of classes contains non-primitive compound fields. Cloning WILL NOT DEEP COPY these + * fields. Modifying some aspects of the cloned object may modify the same aspects of the one it was cloned from. + * Unfortunately these classes have a large number of fields and maintaining hand written copy constructors for + * them might be an even greater liability than carefully choosing how to use clone(). + */ public RegionalTask clone () { return (RegionalTask) super.clone(); } diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/RegionalWorkResult.java b/src/main/java/com/conveyal/r5/analyst/cluster/RegionalWorkResult.java index 39a650d3e..c606acc0f 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/RegionalWorkResult.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/RegionalWorkResult.java @@ -37,6 +37,12 @@ public class RegionalWorkResult { */ public int[][][] accessibilityValues; + /** + * The temporal density of opportunities - how many are reached during each minute of travel. + * Quantities of opportunities for each [destinationGrid, percentile, minute]. + */ + public double[][][] opportunitiesPerMinute; + /** * If this field is non-null, the worker is reporting an error that compromises the quality of the result at this * origin point, and potentially for then entire regional analysis. Put into a Set on backend since all workers @@ -59,14 +65,21 @@ public RegionalWorkResult(OneOriginResult result, RegionalTask task) { this.travelTimeValues = result.travelTimes == null ? null : result.travelTimes.values; this.accessibilityValues = result.accessibility == null ? null : result.accessibility.getIntValues(); this.pathResult = result.paths == null ? null : result.paths.summarizeIterations(PathResult.Stat.MINIMUM); + this.opportunitiesPerMinute = result.density == null ? null : result.density.opportunitiesPerMinute; // TODO checkTravelTimeInvariants, checkAccessibilityInvariants to verify that values are monotonically increasing } - /** Constructor used when results for this origin are considered unusable due to an unhandled error. */ + /** + * Constructor used when results for this origin are considered unusable due to an unhandled error. Besides the + * short-form exception, most result fields are left null. There is no information to communicate, and because + * errors are often produced faster than valid results, we don't want to flood the backend with unnecessarily + * voluminous error reports. The short-form exception message is used for a similar reason, to limit the total size + * of error messages. + */ public RegionalWorkResult(Throwable t, RegionalTask task) { this.jobId = task.jobId; this.taskId = task.taskId; - this.error = ExceptionUtils.shortAndLongString(t); + this.error = ExceptionUtils.filterStackTrace(t); } } diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeResult.java b/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeResult.java index c79f23ab8..c851afcac 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeResult.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeResult.java @@ -37,6 +37,9 @@ public class TravelTimeResult { * This is optional, generally used only for debugging and testing, so may be null if no histograms are recorded. * Since this is used for debugging and testing it might even be interesting to do it at one-second resolution or * just store every travel time, but binning makes it easy to compare with probability distributions. + * Note that this is one histogram _per target_ showing on how many iterations each travel time is the fastest, + * _not_ one histogram per origin/percentile showing how many destinations are reached at each travel time. The + * latter is essentially the discrete derivative of step-function accessibility and is tracked elsewhere (TemporalDensityResult). */ int[][] histograms; diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeSurfaceTask.java b/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeSurfaceTask.java index 81819d9d5..4df88fd35 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeSurfaceTask.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/TravelTimeSurfaceTask.java @@ -1,7 +1,17 @@ package com.conveyal.r5.analyst.cluster; +import com.conveyal.r5.analyst.FreeFormPointSet; +import com.conveyal.r5.analyst.PointSet; import com.conveyal.r5.analyst.WebMercatorExtents; +import com.conveyal.r5.profile.ProfileRequest; import com.fasterxml.jackson.annotation.JsonIgnoreProperties; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.lang.invoke.MethodHandles; + +import static com.conveyal.r5.common.Util.isNullOrEmpty; +import static com.google.common.base.Preconditions.checkState; /** * Instances are serialized and sent from the backend to workers processing single point, @@ -13,6 +23,8 @@ */ public class TravelTimeSurfaceTask extends AnalysisWorkerTask { + private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); + // FIXME red flag - what is this enum enumerating Java types? @Override @@ -48,8 +60,23 @@ public WebMercatorExtents getWebMercatorExtents() { @Override public int nTargetsPerOrigin () { - // In TravelTimeSurfaceTasks, the set of destinations is always determined by the web mercator extents. - return width * height; + // In TravelTimeSurfaceTasks (single-point or single-origin tasks), the set of destinations is always + // determined by the web mercator extents in the request itself. In many cases the destinationPointSets field + // is empty, but when destinationPointSets are present (when we're calculating accessibility), those PointSets + // are required to be gridded and exactly match the task extents (e.g. Grids wrapped in GridTransformWrapper). + // In normal usage this requirement is validated by TravelTimeReducer#checkOpportunityExtents but that function + // only checks when we're computing accessibility, and is only called when destinations are gridded. The + // assertions here serve to further verify this requirement, as we've seen it violated before in tests. + final int nTargets = width * height; + if (destinationPointSets != null) { + for (PointSet pointSet : destinationPointSets) { + checkState( + pointSet.featureCount() == nTargets, + "Destination PointSet expected to exactly match extents embedded in single point task." + ); + } + } + return nTargets; } } diff --git a/src/main/java/com/conveyal/r5/analyst/cluster/WorkerStatus.java b/src/main/java/com/conveyal/r5/analyst/cluster/WorkerStatus.java index 7d002fa9a..1fcd17a6e 100644 --- a/src/main/java/com/conveyal/r5/analyst/cluster/WorkerStatus.java +++ b/src/main/java/com/conveyal/r5/analyst/cluster/WorkerStatus.java @@ -24,6 +24,8 @@ public class WorkerStatus { private static final Logger LOG = LoggerFactory.getLogger(WorkerStatus.class); + private static final int LEGACY_WORKER_MAX_TASKS = 16; + public static final int LEGACY_WORKER_MAX_POLL_INTERVAL_SECONDS = 2 * 60; public String architecture; public int processors; @@ -50,6 +52,20 @@ public class WorkerStatus { public String ipAddress; public List results; + /** + * Then maximum number of tasks the broker should send to this worker. May be zero if its work queue is full. + * Default value determines the number of tasks to send to older workers that don't send this value when they poll. + */ + public int maxTasksRequested = LEGACY_WORKER_MAX_TASKS; + + /** + * The maximum amount of time the worker will wait before polling again. After this much time passes the backend + * may consider the worker lost or shut down. The backend should be somewhat lenient here as there could be delays + * due to connection setup, API contention etc. The default value reflects how how long the backend should wait to + * hear from older workers that don't send this value. + */ + public int pollIntervalSeconds = LEGACY_WORKER_MAX_POLL_INTERVAL_SECONDS; + /** No-arg constructor used when deserializing. */ public WorkerStatus() { } diff --git a/src/main/java/com/conveyal/r5/common/Util.java b/src/main/java/com/conveyal/r5/common/Util.java index ddfce26d5..c79e1c168 100644 --- a/src/main/java/com/conveyal/r5/common/Util.java +++ b/src/main/java/com/conveyal/r5/common/Util.java @@ -3,6 +3,7 @@ import java.util.Arrays; import java.util.Collection; import java.util.Map; +import java.util.function.Supplier; public abstract class Util { @@ -66,4 +67,19 @@ public static int[] newIntArray (int length, int defaultValue) { return array; } + /** + * Convenience method to create a 2D array and fill it immediately with new instances of a class. + * The supplier can be a method reference to a constructor like ToBeInstantiated::new, and the returned + * array will be of that type. + */ + public static T[][] newObjectArray (int d1, int d2, Supplier supplier) { + T[][] result = (T[][]) new Object[d1][d2]; + for (int x = 0; x < d1; x++) { + for (int y = 0; y < d2; y++) { + result[x][y] = supplier.get(); + } + } + return result; + } + } diff --git a/src/main/java/com/conveyal/r5/kryo/KryoNetworkSerializer.java b/src/main/java/com/conveyal/r5/kryo/KryoNetworkSerializer.java index 8bd884246..49a51a9ba 100644 --- a/src/main/java/com/conveyal/r5/kryo/KryoNetworkSerializer.java +++ b/src/main/java/com/conveyal/r5/kryo/KryoNetworkSerializer.java @@ -9,8 +9,9 @@ import com.esotericsoftware.kryo.io.Input; import com.esotericsoftware.kryo.io.Output; import com.esotericsoftware.kryo.serializers.ExternalizableSerializer; +import com.esotericsoftware.kryo.serializers.ImmutableCollectionsSerializers; import com.esotericsoftware.kryo.serializers.JavaSerializer; -import com.esotericsoftware.kryo.util.DefaultStreamFactory; +import com.esotericsoftware.kryo.util.DefaultInstantiatorStrategy; import com.esotericsoftware.kryo.util.MapReferenceResolver; import gnu.trove.impl.hash.TPrimitiveHash; import gnu.trove.list.array.TIntArrayList; @@ -43,8 +44,16 @@ public abstract class KryoNetworkSerializer { * It should also be changed when the semantic content changes from that produced by earlier versions, even when * the serialization format itself does not change. This will ensure newer workers will not load cached older files. * We considered using an ISO date string as the version but that could get confusing when seen in filenames. + * + * History of Network Version (NV) changes (in production releases): + * nv3 since v7.0: switched to Kryo 5 serialization, WebMercatorGridPointSet now contains nested WebMercatorExtents + * nv2 since 2022-04-05 + * nv1 since 2021-04-30: stopped rebuilding networks for every new r5 version, manually setting this version string + * + * When prototyping new features, use a unique identifier such as the branch or a commit ID, not sequential nvX ones. + * This avoids conflicts when multiple changes are combined in a single production release, or some are abandoned. */ - public static final String NETWORK_FORMAT_VERSION = "7689347c"; + public static final String NETWORK_FORMAT_VERSION = "3654f098"; public static final byte[] HEADER = "R5NETWORK".getBytes(); @@ -61,7 +70,7 @@ public abstract class KryoNetworkSerializer { private static Kryo makeKryo () { Kryo kryo; if (COUNT_CLASS_INSTANCES) { - kryo = new Kryo(new InstanceCountingClassResolver(), new MapReferenceResolver(), new DefaultStreamFactory()); + kryo = new Kryo(new InstanceCountingClassResolver(), null); } else { kryo = new Kryo(); } @@ -88,7 +97,7 @@ private static Kryo makeKryo () { // The default strategy requires every class you serialize, even in your dependencies, to have a zero-arg // constructor (which can be private). The setInstantiatorStrategy method completely replaces that default // strategy. The nesting below specifies the Java approach as a fallback strategy to the default strategy. - kryo.setInstantiatorStrategy(new Kryo.DefaultInstantiatorStrategy(new SerializingInstantiatorStrategy())); + kryo.setInstantiatorStrategy(new DefaultInstantiatorStrategy(new SerializingInstantiatorStrategy())); return kryo; } diff --git a/src/main/java/com/conveyal/r5/profile/FastRaptorWorker.java b/src/main/java/com/conveyal/r5/profile/FastRaptorWorker.java index e856345f4..51df4be20 100644 --- a/src/main/java/com/conveyal/r5/profile/FastRaptorWorker.java +++ b/src/main/java/com/conveyal/r5/profile/FastRaptorWorker.java @@ -55,12 +55,6 @@ public class FastRaptorWorker { */ public static final int UNREACHED = Integer.MAX_VALUE; - /** - * Minimum time between alighting from one vehicle and boarding another, in seconds. - * TODO make this configurable, and use loop-transfers from transfers.txt. - */ - public static final int BOARD_SLACK_SECONDS = 60; - public static final int SECONDS_PER_MINUTE = 60; /** @@ -70,8 +64,10 @@ public class FastRaptorWorker { private static final int DEPARTURE_STEP_SEC = 60; /** - * Minimum wait for boarding to account for schedule variation. - * FIXME clarify why this is separate from BOARD_SLACK. If it is not, merge the two constants into BOARD_SLACK_SEC. + * To be considered for boarding, a vehicle must depart at least this long after the rider arrives at the stop. + * Intuitively, "leave this long for transfers" to account for schedule variation or other unexpected variations. + * This is separate from BOARD_SLACK_SECONDS used in McRaptor and point-to-point searches, in case someone needs + * to set them independently. */ private static final int MINIMUM_BOARD_WAIT_SEC = 60; diff --git a/src/main/java/com/conveyal/r5/profile/PathWithTimes.java b/src/main/java/com/conveyal/r5/profile/PathWithTimes.java index ba74490cb..63db21428 100644 --- a/src/main/java/com/conveyal/r5/profile/PathWithTimes.java +++ b/src/main/java/com/conveyal/r5/profile/PathWithTimes.java @@ -19,6 +19,14 @@ * A path that also includes itineraries and bounds for all possible trips on the paths (even those which may not be optimal) */ public class PathWithTimes extends Path { + + /** + * Minimum time between alighting from one vehicle and boarding another, in seconds. + * Appears to be used only in McRaptor and point-to-point searches. + * TODO make this configurable, and use loop-transfers from transfers.txt. + */ + public static final int BOARD_SLACK_SECONDS = 60; + /** Stats for the entire path */ public Stats stats; @@ -92,7 +100,7 @@ private void computeTimes (TransportNetwork network, ProfileRequest req, TIntInt // loop over departures within the time window // firstTrip is the trip on the first pattern int firstTrip = 0; - while (times[0][firstTrip][0] < req.fromTime + accessTime + FastRaptorWorker.BOARD_SLACK_SECONDS) firstTrip++; + while (times[0][firstTrip][0] < req.fromTime + accessTime + BOARD_SLACK_SECONDS) firstTrip++; // now interleave times double walkSpeedMillimetersPerSecond = req.walkSpeed * 1000; @@ -137,7 +145,7 @@ private void computeTimes (TransportNetwork network, ProfileRequest req, TIntInt // TODO should board slack be applied at the origin stop? Is this done in RaptorWorker? // See also below in computeStatistics - time = times[patIdx][trip][1] + transferTime + FastRaptorWorker.BOARD_SLACK_SECONDS; + time = times[patIdx][trip][1] + transferTime + BOARD_SLACK_SECONDS; itin.arriveAtBoardStopTimes[patIdx + 1] = time; } } diff --git a/src/main/java/com/conveyal/r5/profile/ProfileRequest.java b/src/main/java/com/conveyal/r5/profile/ProfileRequest.java index 24ec40c8c..9bc63ab6b 100644 --- a/src/main/java/com/conveyal/r5/profile/ProfileRequest.java +++ b/src/main/java/com/conveyal/r5/profile/ProfileRequest.java @@ -242,6 +242,12 @@ public class ProfileRequest implements Serializable, Cloneable { */ public int monteCarloDraws = 220; + /** + * WARNING This whole tree of classes contains non-primitive compound fields. Cloning WILL NOT DEEP COPY these + * fields. Modifying some aspects of the cloned object may modify the same aspects of the one it was cloned from. + * Unfortunately these classes have a large number of fields and maintaining hand written copy constructors for + * them might be an even greater liability than carefully choosing how to use clone(). + */ public ProfileRequest clone () { try { return (ProfileRequest) super.clone(); diff --git a/src/main/java/com/conveyal/r5/profile/StatsCalculator.java b/src/main/java/com/conveyal/r5/profile/StatsCalculator.java index 53807e117..43e76b98a 100644 --- a/src/main/java/com/conveyal/r5/profile/StatsCalculator.java +++ b/src/main/java/com/conveyal/r5/profile/StatsCalculator.java @@ -23,7 +23,7 @@ public static StatsCollection computeStatistics (ProfileRequest req, int accessT for (int start = req.fromTime; start < req.toTime; start += 60) { // TODO should board slack be applied at the origin stop? Is this done in RaptorWorker? - int timeAtOriginStop = start + accessTime + FastRaptorWorker.BOARD_SLACK_SECONDS; + int timeAtOriginStop = start + accessTime + PathWithTimes.BOARD_SLACK_SECONDS; int bestTimeAtDestinationStop = Integer.MAX_VALUE; PathWithTimes.Itinerary bestItinerary = null; diff --git a/src/main/java/com/conveyal/r5/streets/EgressCostTable.java b/src/main/java/com/conveyal/r5/streets/EgressCostTable.java index 60bf5e336..fb97f4cff 100644 --- a/src/main/java/com/conveyal/r5/streets/EgressCostTable.java +++ b/src/main/java/com/conveyal/r5/streets/EgressCostTable.java @@ -377,15 +377,15 @@ public static EgressCostTable geographicallyCroppedCopy (LinkedPointSet subLinka int targetInSuperLinkage = distanceTable[i]; int distance = distanceTable[i + 1]; - int superX = targetInSuperLinkage % superGrid.width; - int superY = targetInSuperLinkage / superGrid.width; + int superX = targetInSuperLinkage % superGrid.extents.width; + int superY = targetInSuperLinkage / superGrid.extents.width; - int subX = superX + superGrid.west - subGrid.west; - int subY = superY + superGrid.north - subGrid.north; + int subX = superX + superGrid.extents.west - subGrid.extents.west; + int subY = superY + superGrid.extents.north - subGrid.extents.north; // Only retain distance information for points that fall within this sub-grid. - if (subX >= 0 && subX < subGrid.width && subY >= 0 && subY < subGrid.height) { - int targetInSubLinkage = subY * subGrid.width + subX; + if (subX >= 0 && subX < subGrid.extents.width && subY >= 0 && subY < subGrid.extents.height) { + int targetInSubLinkage = subY * subGrid.extents.width + subX; newDistanceTable.add(targetInSubLinkage); newDistanceTable.add(distance); // distance to target does not change when we crop the pointset } diff --git a/src/main/java/com/conveyal/r5/streets/LinkedPointSet.java b/src/main/java/com/conveyal/r5/streets/LinkedPointSet.java index 01a51a43d..36c1d3628 100644 --- a/src/main/java/com/conveyal/r5/streets/LinkedPointSet.java +++ b/src/main/java/com/conveyal/r5/streets/LinkedPointSet.java @@ -201,13 +201,13 @@ public LinkedPointSet (LinkedPointSet sourceLinkage, WebMercatorGridPointSet sub throw new IllegalArgumentException("Source linkage must be for a gridded point set."); } WebMercatorGridPointSet superGrid = (WebMercatorGridPointSet) sourceLinkage.pointSet; - if (superGrid.zoom != subGrid.zoom) { + if (superGrid.extents.zoom != subGrid.extents.zoom) { throw new IllegalArgumentException("Source and sub-grid zoom level do not match."); } - if (subGrid.west + subGrid.width < superGrid.west //sub-grid is entirely west of super-grid - || superGrid.west + superGrid.width < subGrid.west // super-grid is entirely west of sub-grid - || subGrid.north + subGrid.height < superGrid.north //sub-grid is entirely north of super-grid (note Web Mercator conventions) - || superGrid.north + superGrid.height < subGrid.north) { //super-grid is entirely north of sub-grid + if (subGrid.extents.west + subGrid.extents.width < superGrid.extents.west //sub-grid is entirely west of super-grid + || superGrid.extents.west + superGrid.extents.width < subGrid.extents.west // super-grid is entirely west of sub-grid + || subGrid.extents.north + subGrid.extents.height < superGrid.extents.north //sub-grid is entirely north of super-grid (note Web Mercator conventions) + || superGrid.extents.north + superGrid.extents.height < subGrid.extents.north) { //super-grid is entirely north of sub-grid LOG.warn("Sub-grid is entirely outside the super-grid. Points will not be linked to any street edges."); } @@ -219,7 +219,7 @@ public LinkedPointSet (LinkedPointSet sourceLinkage, WebMercatorGridPointSet sub this.baseLinkage = sourceLinkage; this.cropped = true; // This allows calling the correct cost table builder function later, see Javadoc on field. - int nCells = subGrid.width * subGrid.height; + int nCells = subGrid.extents.width * subGrid.extents.height; edges = new int[nCells]; distancesToEdge_mm = new int[nCells]; distances0_mm = new int[nCells]; @@ -231,16 +231,16 @@ public LinkedPointSet (LinkedPointSet sourceLinkage, WebMercatorGridPointSet sub // Copy a subset of linkage information (edges and distances for each cell) over from the source linkage to // the new sub-linkage. This basically crops a smaller rectangle out of the larger one (or copies it if // dimensions are the same). Variables x, y, and pixel are relative to the new linkage, not the source one. - for (int y = 0, pixel = 0; y < subGrid.height; y++) { - for (int x = 0; x < subGrid.width; x++, pixel++) { - int sourceColumn = subGrid.west + x - superGrid.west; - int sourceRow = subGrid.north + y - superGrid.north; - if (sourceColumn < 0 || sourceColumn >= superGrid.width || sourceRow < 0 || sourceRow >= superGrid.height) { //point is outside super-grid + for (int y = 0, pixel = 0; y < subGrid.extents.height; y++) { + for (int x = 0; x < subGrid.extents.width; x++, pixel++) { + int sourceColumn = subGrid.extents.west + x - superGrid.extents.west; + int sourceRow = subGrid.extents.north + y - superGrid.extents.north; + if (sourceColumn < 0 || sourceColumn >= superGrid.extents.width || sourceRow < 0 || sourceRow >= superGrid.extents.height) { //point is outside super-grid // Set the edge value to -1 to indicate no linkage. // Distances should never be read downstream, so they don't need to be set here. edges[pixel] = -1; } else { //point is inside super-grid - int sourcePixel = sourceRow * superGrid.width + sourceColumn; + int sourcePixel = sourceRow * superGrid.extents.width + sourceColumn; edges[pixel] = sourceLinkage.edges[sourcePixel]; distancesToEdge_mm[pixel] = sourceLinkage.distancesToEdge_mm[sourcePixel]; distances0_mm[pixel] = sourceLinkage.distances0_mm[sourcePixel]; diff --git a/src/main/java/com/conveyal/r5/util/ExceptionUtils.java b/src/main/java/com/conveyal/r5/util/ExceptionUtils.java index 901651e85..d7edfcee9 100644 --- a/src/main/java/com/conveyal/r5/util/ExceptionUtils.java +++ b/src/main/java/com/conveyal/r5/util/ExceptionUtils.java @@ -50,4 +50,25 @@ public static String shortAndLongString (Throwable throwable) { return shortCauseString(throwable) + "\n[detail follows]\n" + stackTraceString(throwable); } + /** + * Given a full stack trace string with one frame per line, keep only the exception name, the first stack frame, + * and all additional frames that come from Conveyal packages. This yields a much shorter stack trace that still + * shows where the exception was thrown and where the problem originates in our own code. + */ + public static String filterStackTrace (Throwable throwable) { + String stackTrace = stackTraceString(throwable); + final String unknownFrame = "Unknown stack frame, probably optimized out by JVM."; + String error = stackTrace.lines().findFirst().get(); + String frame = stackTrace.lines() + .map(String::strip) + .filter(s -> s.startsWith("at ")) + .findFirst().orElse(unknownFrame); + String conveyalFrame = stackTrace.lines() + .map(String::strip) + .filter(s -> s.startsWith("at com.conveyal.")) + .filter(s -> !frame.equals(s)) + .findFirst().orElse(""); + return String.join("\n", error, frame, conveyalFrame); + } + } diff --git a/src/main/java/com/conveyal/r5/util/Histogram.java b/src/main/java/com/conveyal/r5/util/Histogram.java index cad306e5b..a585e8b0e 100644 --- a/src/main/java/com/conveyal/r5/util/Histogram.java +++ b/src/main/java/com/conveyal/r5/util/Histogram.java @@ -111,9 +111,9 @@ public void displayHorizontal () { row.append(' '); } - String start = new Integer(minBin).toString(); + String start = Integer.toString(minBin); row.replace(0, start.length(), start); - String end = new Integer(maxBin).toString(); + String end = Integer.toString(maxBin); row.replace(row.length() - end.length(), row.length(), end); System.out.println(row); } diff --git a/src/main/resources/com/conveyal/gtfs/storage/gpwv3-quarter-buffer-boolean.asc b/src/main/resources/com/conveyal/gtfs/storage/gpwv3-quarter-buffer-boolean.asc new file mode 100644 index 000000000..d1beddacd --- /dev/null +++ b/src/main/resources/com/conveyal/gtfs/storage/gpwv3-quarter-buffer-boolean.asc @@ -0,0 +1,578 @@ +ncols 1440 +nrows 572 +xllcorner -180.000000000000 +yllcorner -58.000000000000 +cellsize 0.250000000000 +NODATA_value -3.4028234663852885981e+38 + 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml index 00e0cdabf..34bfac76c 100644 --- a/src/main/resources/logback.xml +++ b/src/main/resources/logback.xml @@ -22,4 +22,7 @@ + + + \ No newline at end of file diff --git a/src/test/java/com/conveyal/data/census/IntegrationTest.java b/src/test/java/com/conveyal/data/census/IntegrationTest.java index 0c30f99e2..65f5df6e8 100644 --- a/src/test/java/com/conveyal/data/census/IntegrationTest.java +++ b/src/test/java/com/conveyal/data/census/IntegrationTest.java @@ -89,7 +89,7 @@ public void testAll () throws Exception { assertTrue(features.containsKey(110010014023009L)); // read the workplace area characteristics csv - InputStream csv = new GZIPInputStream(new FileInputStream(new File(new File(dir, "jobs"), "dc_wac_S000_JT00_2013.csv.gz"))); + InputStream csv = new GZIPInputStream(new FileInputStream(new File(new File(dir, "jobs"), "DC_2021_wac.csv.gz"))); reader = new CsvReader(new InputStreamReader(csv)); reader.readHeaders(); @@ -153,7 +153,7 @@ public void testAll () throws Exception { assertTrue(foundJobsEntry); // read the rac csv - csv = new GZIPInputStream(new FileInputStream(new File(new File(dir, "workforce"), "dc_rac_S000_JT00_2013.csv.gz"))); + csv = new GZIPInputStream(new FileInputStream(new File(new File(dir, "workforce"), "DC_2021_rac.csv.gz"))); reader = new CsvReader(new InputStreamReader(csv)); reader.readHeaders(); diff --git a/src/test/java/com/conveyal/r5/analyst/GridTest.java b/src/test/java/com/conveyal/r5/analyst/GridTest.java index 03149d1c2..c7f8833e0 100644 --- a/src/test/java/com/conveyal/r5/analyst/GridTest.java +++ b/src/test/java/com/conveyal/r5/analyst/GridTest.java @@ -177,5 +177,17 @@ private static void assertArrayEquals ( assertEquals(aSum, bSum, gridSumTolerance); } } + + /** Test that latitude/longitude to pixel conversions are correct */ + @Test + public void testLatLonPixelConversions () { + final int ZOOM = WebMercatorExtents.DEFAULT_ZOOM; + for (double lat : new double [] { -75, -25, 0, 25, 75 }) { + assertEquals(lat, Grid.pixelToLat(Grid.latToPixel(lat, ZOOM), ZOOM), 1e-2); + } + for (double lon : new double [] { -175, -90, 0, 90, 175}) { + assertEquals(lon, Grid.pixelToLon(Grid.lonToPixel(lon, ZOOM), ZOOM), 1e-2); + } + } } diff --git a/src/test/java/com/conveyal/r5/analyst/WebMercatorExtentsTest.java b/src/test/java/com/conveyal/r5/analyst/WebMercatorExtentsTest.java new file mode 100644 index 000000000..e0600cb6e --- /dev/null +++ b/src/test/java/com/conveyal/r5/analyst/WebMercatorExtentsTest.java @@ -0,0 +1,71 @@ +package com.conveyal.r5.analyst; + +import org.junit.jupiter.api.Assertions; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.ValueSource; +import org.locationtech.jts.geom.Envelope; + +class WebMercatorExtentsTest { + + /** + * Normal usage of Conveyal Analysis involves a feedback loop between Web Mercator extents and WGS84 extents. + * This is because the API endpoint to create a new regional analysis requires extents in WGS84, but these are + * always converted into Web Mercator to run the actual analysis. If someone wants to run another analysis with + * the same dimensions, the UI must extract them from the database record or results of the previous analysis and + * pass back through the WGS84 coordinate system. + * + * We originally made an ill-advised assumption that most WGS84 extents would not fall exactly on Mercator pixel + * boundaries. This is sort of true for locations drawn from nature: the vast majority of real numbers are not + * integers. But once we discretize these into Mercator pixels/cells and feed those values back into the conversion, + * of course they are integers! In addition, there may be numerical instability in the conversion such that we + * sometimes get integers and other times coordinates falling ever so slightly on either side of the pixel boundary. + * + * This test verifies that such repeated conversions are stable and do not yield an ever-increasing envelope size. + * Ideally we should also test that this is the case when the non-integer WGS84 values are truncated by a few + * digits (as when they are stored in a database or serialized over the wire). + */ + @ParameterizedTest + @ValueSource(ints = {9, 10, 11, 12}) + void wgsMercatorStability (int zoom) { + Envelope wgsEnvelope = new Envelope(); + wgsEnvelope.expandToInclude(10.22222222, 45.111111); + wgsEnvelope.expandBy(0.1); + WebMercatorExtents webMercatorExtents = WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + + for (int i = 0; i < 10; i++) { + Assertions.assertTrue(webMercatorExtents.width > 20); + Assertions.assertTrue(webMercatorExtents.height > 20); + wgsEnvelope = webMercatorExtents.toWgsEnvelope(); + // Note the use of the trimmed envelope factory function, which should be used in the API. + WebMercatorExtents webMercatorExtents2 = WebMercatorExtents.forTrimmedWgsEnvelope(wgsEnvelope, zoom); + Assertions.assertEquals(webMercatorExtents2, webMercatorExtents); + webMercatorExtents = webMercatorExtents2; + } + } + + /** + * Check that a zero-size envelope (around a single point for example) will yield an extents object containing + * one cell (rather than zero cells). Also check an envelope with a tiny nonzero envelope away from cell edges. + */ + @ParameterizedTest + @ValueSource(ints = {9, 10, 11, 12}) + void singleCellExtents (int zoom) { + Envelope wgsEnvelope = new Envelope(); + + wgsEnvelope.expandToInclude(10.22222222, 10.32222222); + WebMercatorExtents webMercatorExtents = WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + Assertions.assertEquals(1, webMercatorExtents.width); + Assertions.assertEquals(1, webMercatorExtents.height); + + wgsEnvelope.expandBy(0.00001); + webMercatorExtents = WebMercatorExtents.forWgsEnvelope(wgsEnvelope, zoom); + Assertions.assertEquals(1, webMercatorExtents.width); + Assertions.assertEquals(1, webMercatorExtents.height); + + // Try taking these single-pixel extents through WGS84 for good measure. + WebMercatorExtents wme2 = WebMercatorExtents.forTrimmedWgsEnvelope(webMercatorExtents.toWgsEnvelope(), zoom); + Assertions.assertEquals(webMercatorExtents, wme2); + } + +} \ No newline at end of file diff --git a/src/test/java/com/conveyal/r5/analyst/WebMercatorGridPointSetTest.java b/src/test/java/com/conveyal/r5/analyst/WebMercatorGridPointSetTest.java index 5f85ae2b7..a3bd481c7 100644 --- a/src/test/java/com/conveyal/r5/analyst/WebMercatorGridPointSetTest.java +++ b/src/test/java/com/conveyal/r5/analyst/WebMercatorGridPointSetTest.java @@ -20,23 +20,6 @@ */ public class WebMercatorGridPointSetTest { - /** Test that latitude/longitude to pixel conversions are correct */ - @Test - public void testLatLonPixelConversions () { - // offsets and width/height not needed for calculations - WebMercatorGridPointSet ps = new WebMercatorGridPointSet( - WebMercatorGridPointSet.DEFAULT_ZOOM, 0,0, 100, 100, null - ); - - for (double lat : new double [] { -75, -25, 0, 25, 75 }) { - assertEquals(lat, ps.pixelToLat(ps.latToPixel(lat)), 1e-2); - } - - for (double lon : new double [] { -175, -90, 0, 90, 175}) { - assertEquals(lon, ps.pixelToLon(ps.lonToPixel(lon)), 1e-2); - } - } - /** Test that we can find pixel numbers for envelopes intersecting a gridded PointSet. */ @Test public void testPixelsInEnvelope () { diff --git a/src/test/java/com/conveyal/r5/analyst/network/Distribution.java b/src/test/java/com/conveyal/r5/analyst/network/Distribution.java index 950a5f19f..ac93c0484 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/Distribution.java +++ b/src/test/java/com/conveyal/r5/analyst/network/Distribution.java @@ -1,9 +1,12 @@ package com.conveyal.r5.analyst.network; import com.conveyal.r5.analyst.cluster.TravelTimeResult; +import com.google.common.base.Preconditions; import java.util.Arrays; +import static java.lang.Math.pow; +import static java.lang.Math.sqrt; import static org.junit.jupiter.api.Assertions.assertTrue; /** @@ -90,6 +93,10 @@ public void normalize () { } } + /** + * Print a text-based representation of the distribution to standard out. + * There is another method to show the distribution in a graphical plot window. + */ public void illustrate () { final int width = 50; double max = Arrays.stream(masses).max().getAsDouble(); @@ -102,6 +109,12 @@ public void illustrate () { } } + /** + * Given a percentile such as 25 or 50, find the x bin at which that percentile is situated in this Distribution, + * i.e. the lowest (binned or discretized) x value for which the cumulative probability is at least percentile. + * In common usage: find the lowest whole-minute travel time for which the cumulative probability is greater than + * the supplied percentile. + */ public int findPercentile (int percentile) { double sum = 0; double threshold = percentile / 100d; @@ -123,6 +136,10 @@ public static void main (String[] args) { out.illustrate(); } + /** + * @return the probability mass situated at a particular x value (the probability density for a particular minute + * when these are used in the usual way as 1-minute bins). + */ public double probabilityOf (int x) { if (x < skip) { return 0; @@ -200,10 +217,18 @@ public static Distribution fromTravelTimeResult (TravelTimeResult travelTimeResu } /** - * Find the probability mass of the overlapping region of the two distributions. The amount of "misplaced" - * probability is one minus overlap. Overlap is slightly more straightforward to calculate directly than mismatch. + * Find the probability mass of the overlapping region of the two distributions. This can be used to determine + * whether two distributions, often a theoretical one and an observed one, are sufficiently similar to one another. + * Overlapping here means in both dimensions, travel time (horizontal) and probability density (vertical). + * Proceeding bin by bin through both distributions in parallel, the smaller of the two values for each bin is + * accumulated into the total. The amount of "misplaced" probability (located in the wrong bin in the observed + * distribution relative to the theoretical one) is one minus overlap. Overlap is slightly more straightforward + * to calculate directly than mismatch. This method is not sensitive to how evenly the error is distributed + * across the domain. We should prefer using a measure that emphasizes larger errors and compensates for the + * magnitude of the predicted values. */ public double overlap (Distribution other) { + // TODO This min is not necessary. The overlap is by definition fully within the domain of either Distribution. int iMin = Math.min(this.skip, other.skip); int iMax = Math.max(this.fullWidth(), other.fullWidth()); double sum = 0; @@ -216,12 +241,45 @@ public double overlap (Distribution other) { return sum; } + /** + * An ad-hoc measure of goodness of fit vaguely related to Pearson's chi-squared or root-mean-square error. + * Traditional measures used in fitting probability distributions like Pearson's have properties that deal poorly + * with our need to tolerate small horizontal shifts + * in the results (due to the destination grid being not precisely aligned with our street corner grid). + * Another way to deal with this would be to ensure there is no horizontal shift, by measuring travel times at + * exactly the right places instead of on a grid. + */ + public double weightedSquaredError (Distribution other) { + double sum = 0; + // This is kind of ugly because we're only examining bins with nonzero probability (to avoid div by zero). + // Observed data in a region with predicted zero probability should be an automatic fail for the model. + for (int i = this.skip; i < this.fullWidth(); i++) { + double pe = this.probabilityOf(i); + double po = other.probabilityOf(i); + Preconditions.checkState(pe >= 0); // Ensure non-negative for good measure. + if (pe == 0) { + System.out.println("Zero (expected probability; skipping."); + continue; + } + // Errors are measured relative to the expected values, and stronger deviations emphasized by squaring. + // Measuring relative to expected density compensates for the case where it is spread over a wider domain. + sum += pow(po - pe, 2) / pe; + } + System.out.println("Squared error: " + sum); + System.out.println("Root Squared error: " + sqrt(sum)); + return sum; + } + public void assertSimilar (Distribution observed) { + double squaredError = this.weightedSquaredError(observed); + showChartsIfEnabled(observed); + assertTrue(squaredError < 0.025, String.format("Error metric too high at at %3f", squaredError)); + } + + public void showChartsIfEnabled (Distribution observed) { if (SHOW_CHARTS) { DistributionChart.showChart(this, observed); } - double overlapPercent = this.overlap(observed) * 100; - assertTrue(overlapPercent >= 95, String.format("Overlap less than 95%% at %3f", overlapPercent)); } // This is ugly, it should be done some other way e.g. firstNonzero @@ -249,4 +307,19 @@ public void trim () { } masses = Arrays.copyOfRange(masses, firstNonzero, lastNonzero + 1); } + + /** + * Here we are performing two related checks for a bit of redundancy and to check different parts of the system: + * checking percentiles drawn from the observed distribution, as well as the full histogram of the distribution. + * This double comparison could be done automatically with a method like Distribution.assertSimilar(TravelTimeResult). + * @param destination the flattened 1D index into the pointset, which will be zero for single freeform points. + */ + public void multiAssertSimilar(TravelTimeResult travelTimes, int destination) { + // Check a goodness-of-fit metric on the observed distribution relative to this distribution. + Distribution observed = Distribution.fromTravelTimeResult(travelTimes, destination); + this.assertSimilar(observed); + // Check that percentiles extracted from observed are similar to those predicted by this distribution. + int[] travelTimePercentiles = travelTimes.getTarget(destination); + DistributionTester.assertExpectedDistribution(this, travelTimePercentiles); + } } diff --git a/src/test/java/com/conveyal/r5/analyst/network/DistributionChart.java b/src/test/java/com/conveyal/r5/analyst/network/DistributionChart.java index 7d4fc5fed..7f2cdb11d 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/DistributionChart.java +++ b/src/test/java/com/conveyal/r5/analyst/network/DistributionChart.java @@ -61,10 +61,13 @@ public JFreeChart createChart (Distribution... distributions) { return chart; } + // Note that the points are placed at the minute boundary, though the numbers represent densities over one minute. + // They should probably be represented as filled bars across the minute or as points midway across the minute. private static TimeSeriesCollection createTimeSeriesDataset (Distribution... distributions) { TimeSeriesCollection dataset = new TimeSeriesCollection(); + int d = 0; for (Distribution distribution : distributions) { - TimeSeries ts = new TimeSeries("X"); + TimeSeries ts = new TimeSeries("Distribution " + (d++)); for (int i = distribution.skip(); i < distribution.fullWidth(); i++) { double p = distribution.probabilityOf(i); ts.add(new Minute(i, 0, 1, 1, 2000), p); diff --git a/src/test/java/com/conveyal/r5/analyst/network/DistributionTester.java b/src/test/java/com/conveyal/r5/analyst/network/DistributionTester.java index 3b413dbc6..219d9022d 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/DistributionTester.java +++ b/src/test/java/com/conveyal/r5/analyst/network/DistributionTester.java @@ -24,6 +24,11 @@ public static void assertUniformlyDistributed (int[] sortedPercentiles, int min, } } + /** + * Given an expected distribution of travel times at a destination and the standard five percentiles of travel time + * at that same destination as computed by our router, check that the computed values seem to be drawn from the + * theoretically correct distribution. + */ public static void assertExpectedDistribution (Distribution expectedDistribution, int[] values) { for (int p = 0; p < PERCENTILES.length; p++) { int expected = expectedDistribution.findPercentile(PERCENTILES[p]); diff --git a/src/test/java/com/conveyal/r5/analyst/network/GridLayout.java b/src/test/java/com/conveyal/r5/analyst/network/GridLayout.java index 67afe013a..b2e1daf9d 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/GridLayout.java +++ b/src/test/java/com/conveyal/r5/analyst/network/GridLayout.java @@ -2,9 +2,6 @@ import com.conveyal.gtfs.GTFSFeed; import com.conveyal.osmlib.OSM; -import com.conveyal.r5.analyst.Grid; -import com.conveyal.r5.analyst.WebMercatorGridPointSet; -import com.conveyal.r5.analyst.cluster.AnalysisWorkerTask; import com.conveyal.r5.common.SphericalDistanceLibrary; import com.conveyal.r5.profile.StreetMode; import com.conveyal.r5.transit.TransportNetwork; @@ -13,13 +10,10 @@ import org.locationtech.jts.geom.Envelope; import java.util.ArrayList; -import java.util.Arrays; import java.util.List; import java.util.UUID; import java.util.stream.Stream; -import static com.conveyal.r5.analyst.WebMercatorGridPointSet.DEFAULT_ZOOM; - /** * This is used in testing, to represent and create gridded transport systems with very regular spacing of roads and * transit stops, yielding highly predictable travel times that can be tested against actual output from the router. @@ -165,12 +159,8 @@ public void addVerticalFrequencyRoute (int col, int headwayMinutes) { } /** Creates a builder for analysis worker tasks, which represent searches on this grid network. */ - public GridSinglePointTaskBuilder newTaskBuilder() { - return new GridSinglePointTaskBuilder(this); - } - - public GridSinglePointTaskBuilder copyTask(AnalysisWorkerTask task) { - return new GridSinglePointTaskBuilder(this, task); + public GridRegionalTaskBuilder newTaskBuilder() { + return new GridRegionalTaskBuilder(this); } /** Get the minimum envelope containing all the points in this grid. */ @@ -179,37 +169,6 @@ public Envelope gridEnvelope () { return new Envelope(originPoint.x, farCorner.x, originPoint.y, farCorner.y); } - /** - * Create a gridded pointset coextensive with this grid, with the given number of opportunities in each cell. - * TODO maybe derive this from the network's gridded pointset rather than the GridLayout. - */ - public Grid makeUniformOpportunityDataset (double density) { - Grid grid = new Grid(DEFAULT_ZOOM, this.gridEnvelope()); - for (double[] column : grid.grid) { - Arrays.fill(column, density); - } - return grid; - } - - /** - * Create a gridded pointset coextensive with this grid, with the given number of opportunities in each cell in the - * eastern half of the grid. - */ - public Grid makeRightHalfOpportunityDataset (double density) { - Grid grid = new Grid(DEFAULT_ZOOM, this.gridEnvelope()); - for (int c = grid.grid.length / 2; c < grid.grid.length; c++) { - Arrays.fill(grid.grid[c], density); - } - return grid; - } - - public int pointIndex(AnalysisWorkerTask task, int x, int y) { - Coordinate destLatLon = this.getIntersectionLatLon(x, y); - // Here is a bit of awkwardness where WebMercatorGridPointSet and Grid both extend PointSet, but don't share - // their grid referencing code, so one would have to be converted to the other to get the point index. - return new WebMercatorGridPointSet(task.getWebMercatorExtents()).getPointIndexContaining(destLatLon); - } - public String nextIntegerId() { return Integer.toString(nextIntegerId++); } diff --git a/src/test/java/com/conveyal/r5/analyst/network/GridRegionalTaskBuilder.java b/src/test/java/com/conveyal/r5/analyst/network/GridRegionalTaskBuilder.java new file mode 100644 index 000000000..5b809b447 --- /dev/null +++ b/src/test/java/com/conveyal/r5/analyst/network/GridRegionalTaskBuilder.java @@ -0,0 +1,146 @@ +package com.conveyal.r5.analyst.network; + +import com.conveyal.r5.analyst.FreeFormPointSet; +import com.conveyal.r5.analyst.PointSet; +import com.conveyal.r5.analyst.WebMercatorExtents; +import com.conveyal.r5.analyst.cluster.AnalysisWorkerTask; +import com.conveyal.r5.analyst.cluster.RegionalTask; +import com.conveyal.r5.analyst.decay.StepDecayFunction; +import com.conveyal.r5.api.util.LegMode; +import com.conveyal.r5.api.util.TransitModes; +import org.locationtech.jts.geom.Coordinate; + +import java.time.LocalTime; +import java.util.EnumSet; +import java.util.stream.IntStream; + +import static com.conveyal.r5.analyst.WebMercatorExtents.DEFAULT_ZOOM; +import static com.conveyal.r5.analyst.network.GridGtfsGenerator.WEEKDAY_DATE; +import static com.conveyal.r5.analyst.network.GridGtfsGenerator.WEEKEND_DATE; + +/** + * This creates a task for use in tests. It uses a builder pattern but modifies a non-immutable task object. It + * provides convenience methods to set all the necessary fields. This builder may be reused to produce several tasks in + * a row with different settings, but only use the most recently produced one at any time. See build() for further + * explanation. We want to use a limited number of destinations at exact points instead of Mercator gridded + * destinations, which would not be exactly aligned with the desert grid. Therefore we create regional tasks rather + * than single-point TravelTimeSurfaceTasks because single-point tasks always have gridded destinations (they always + * return gridded travel times which must be exactly aligned with any accessibility destinations). + */ +public class GridRegionalTaskBuilder { + + public static final int DEFAULT_MONTE_CARLO_DRAWS = 4800; // 40 per minute over a two hour window. + private final GridLayout gridLayout; + + private final RegionalTask task; + + public GridRegionalTaskBuilder(GridLayout gridLayout) { + this.gridLayout = gridLayout; + // We will accumulate settings into this task. + task = new RegionalTask(); + task.date = WEEKDAY_DATE; + // Set defaults that can be overridden by calling builder methods. + task.accessModes = EnumSet.of(LegMode.WALK); + task.egressModes = EnumSet.of(LegMode.WALK); + task.directModes = EnumSet.of(LegMode.WALK); + task.transitModes = EnumSet.allOf(TransitModes.class); + // Override the percentiles to get min, 25, median, 75, max. + // Max percentiles is limited to 5 so we can't return all 100 of them. + // Our percentile definition will yield an index of -1 for percentile zero. + // But in a list of more than 100 items, percentile 1 and 99 will return the first and last elements. + task.percentiles = DistributionTester.PERCENTILES; + // In single point tasks all 121 cutoffs are required (there is a check). + task.cutoffsMinutes = IntStream.rangeClosed(0, 120).toArray(); + task.decayFunction = new StepDecayFunction(); + task.monteCarloDraws = DEFAULT_MONTE_CARLO_DRAWS; + // By default, traverse one block in a round predictable number of seconds. + task.walkSpeed = gridLayout.streetGridSpacingMeters / gridLayout.walkBlockTraversalTimeSeconds; + // Unlike single point tasks, travel time recording must be enabled manually on regional tasks. + task.recordTimes = true; + // Record more detailed information to allow comparison to theoretical travel time distributions. + task.recordTravelTimeHistograms = true; + // Set the grid extents on the task, otherwise the task will fail checks on the grid dimensions and zoom level. + WebMercatorExtents extents = WebMercatorExtents.forWgsEnvelope(gridLayout.gridEnvelope(), DEFAULT_ZOOM); + task.zoom = extents.zoom; + task.north = extents.north; + task.west = extents.west; + task.width = extents.width; + task.height = extents.height; + } + + public GridRegionalTaskBuilder setOrigin (int gridX, int gridY) { + Coordinate origin = gridLayout.getIntersectionLatLon(gridX, gridY); + task.fromLat = origin.y; + task.fromLon = origin.x; + return this; + } + + public GridRegionalTaskBuilder weekdayMorningPeak () { + task.date = WEEKDAY_DATE; + morningPeak(); + return this; + } + + public GridRegionalTaskBuilder weekendMorningPeak () { + task.date = WEEKEND_DATE; + morningPeak(); + return this; + } + + public GridRegionalTaskBuilder morningPeak () { + task.fromTime = LocalTime.of(7, 00).toSecondOfDay(); + task.toTime = LocalTime.of(9, 00).toSecondOfDay(); + return this; + } + + public GridRegionalTaskBuilder departureTimeWindow(int startHour, int startMinute, int durationMinutes) { + task.fromTime = LocalTime.of(startHour, startMinute).toSecondOfDay(); + task.toTime = LocalTime.of(startHour, startMinute + durationMinutes).toSecondOfDay(); + return this; + } + + public GridRegionalTaskBuilder maxRides(int rides) { + task.maxRides = rides; + return this; + } + + /** + * When trying to verify more complex distributions, the Monte Carlo approach may introduce too much noise. + * Increasing the number of draws will yield a better approximation of the true travel time distribution + * (while making the tests run slower). + */ + public GridRegionalTaskBuilder monteCarloDraws (int draws) { + task.monteCarloDraws = draws; + return this; + } + + /** + * Create a FreeformPointSet with a single point in it situated at the specified street intersection, and embed + * that PointSet in the request. In normal usage supplying FreeformPointSets as destination is only done for + * regional analysis tasks, but a testing code path exists to handle their presence on single point requests. + * This eliminates any difficulty estimating the final segment of egress, walking from the street to a gridded + * travel time sample point. Although egress time is something we'd like to test too, it is not part of the transit + * routing we're concentrating on here, and will vary as the Simpson Desert street grid does not align with our + * web Mercator grid pixels. Using a single measurement point also greatly reduces the amount of travel time + * histograms that must be computed and retained, improving the memory and run time cost of tests. + */ + public GridRegionalTaskBuilder singleFreeformDestination(int x, int y) { + FreeFormPointSet ps = new FreeFormPointSet(gridLayout.getIntersectionLatLon(x, y)); + // Downstream code expects to see the same number of keys and PointSet objects so initialize both. + task.destinationPointSetKeys = new String[] { "POINT_SET" }; + task.destinationPointSets = new PointSet[] { ps }; + return this; + } + + /** + * Produce a new AnalysisWorkerTask object based on the settings applied to this builder. The builder remains + * valid after this operation, and later calls to build() after further modifying the settings will return + * separate AnalysisWorkerTask objects. HOWEVER despite the use of clone(), these task objects share references + * to some sub-objects such as arrays or Sets. To avoid problems, only use the most recently produced task from + * the builder. Do not continue using tasks produced by previous calls to build(). + */ + public AnalysisWorkerTask build () { + return task.clone(); + } + +} diff --git a/src/test/java/com/conveyal/r5/analyst/network/GridRoute.java b/src/test/java/com/conveyal/r5/analyst/network/GridRoute.java index a108204bf..bbbee9fbf 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/GridRoute.java +++ b/src/test/java/com/conveyal/r5/analyst/network/GridRoute.java @@ -21,7 +21,7 @@ public class GridRoute { public Orientation orientation; public boolean bidirectional; - /** Explicit departure times from first stop; if set, startHour and endHour will be ignored*/ + /** Explicit departure times from first stop; if set, startHour and endHour will be ignored. */ public int[] startTimes; /** Override default hop times. Map of (trip, stopAtStartOfHop) to factor by which default hop is multiplied. */ diff --git a/src/test/java/com/conveyal/r5/analyst/network/GridSinglePointTaskBuilder.java b/src/test/java/com/conveyal/r5/analyst/network/GridSinglePointTaskBuilder.java deleted file mode 100644 index 431dfcfbc..000000000 --- a/src/test/java/com/conveyal/r5/analyst/network/GridSinglePointTaskBuilder.java +++ /dev/null @@ -1,140 +0,0 @@ -package com.conveyal.r5.analyst.network; - -import com.conveyal.r5.analyst.FreeFormPointSet; -import com.conveyal.r5.analyst.Grid; -import com.conveyal.r5.analyst.PointSet; -import com.conveyal.r5.analyst.cluster.AnalysisWorkerTask; -import com.conveyal.r5.analyst.cluster.TravelTimeSurfaceTask; -import com.conveyal.r5.analyst.decay.StepDecayFunction; -import com.conveyal.r5.api.util.LegMode; -import com.conveyal.r5.api.util.TransitModes; -import org.locationtech.jts.geom.Coordinate; - -import java.time.LocalTime; -import java.util.EnumSet; -import java.util.stream.IntStream; - -import static com.conveyal.r5.analyst.network.GridGtfsGenerator.WEEKDAY_DATE; -import static com.conveyal.r5.analyst.network.GridGtfsGenerator.WEEKEND_DATE; - -/** - * This creates a task for use in tests. It uses a builder pattern but for a non-immutable task object. - * It provides convenience methods to set all the necessary fields. - * - * Usually we would rather search out to freeform pointsets containing a few exact points instead of grid pointsets - * which will not align exactly with the street intersections. However as of this writing single point tasks could only - * search out to grids, which are hard-wired into fields of the task, not derived from the pointset object. - * - * We may actually want to test with regional tasks to make this less strange, and eventually merge both request types. - */ -public class GridSinglePointTaskBuilder { - - private final GridLayout gridLayout; - private final AnalysisWorkerTask task; - - public GridSinglePointTaskBuilder (GridLayout gridLayout) { - this.gridLayout = gridLayout; - // We will accumulate settings into this task. - task = new TravelTimeSurfaceTask(); - task.date = WEEKDAY_DATE; - // Set defaults that can be overridden by calling builder methods. - task.accessModes = EnumSet.of(LegMode.WALK); - task.egressModes = EnumSet.of(LegMode.WALK); - task.directModes = EnumSet.of(LegMode.WALK); - task.transitModes = EnumSet.allOf(TransitModes.class); - // Override the percentiles to get min, 25, median, 75, max. - // Max percentiles is limited to 5 so we can't return all 100 of them. - // Our percentile definition will yield an index of -1 for percentile zero. - // But in a list of more than 100 items, percentile 1 and 99 will return the first and last elements. - task.percentiles = DistributionTester.PERCENTILES; - // In single point tasks all 121 cutoffs are required (there is a check). - task.cutoffsMinutes = IntStream.rangeClosed(0, 120).toArray(); - task.decayFunction = new StepDecayFunction(); - task.monteCarloDraws = 1200; // Ten per minute over a two hour window. - // By default, traverse one block in a round predictable number of seconds. - task.walkSpeed = gridLayout.streetGridSpacingMeters / gridLayout.walkBlockTraversalTimeSeconds; - // Record more detailed information to allow comparison to theoretical travel time distributions. - task.recordTravelTimeHistograms = true; - } - - public GridSinglePointTaskBuilder (GridLayout layout, AnalysisWorkerTask task) { - this.gridLayout = layout; - this.task = task.clone(); - } - - public GridSinglePointTaskBuilder setOrigin (int gridX, int gridY) { - Coordinate origin = gridLayout.getIntersectionLatLon(gridX, gridY); - task.fromLat = origin.y; - task.fromLon = origin.x; - return this; - } - - public GridSinglePointTaskBuilder setDestination (int gridX, int gridY) { - Coordinate destination = gridLayout.getIntersectionLatLon(gridX, gridY); - task.destinationPointSets = new PointSet[] { new FreeFormPointSet(destination) }; - task.destinationPointSetKeys = new String[] { "ID" }; - task.toLat = destination.y; - task.toLon = destination.x; - task.includePathResults = true; - return this; - } - - public GridSinglePointTaskBuilder weekdayMorningPeak () { - task.date = WEEKDAY_DATE; - morningPeak(); - return this; - } - - public GridSinglePointTaskBuilder weekendMorningPeak () { - task.date = WEEKEND_DATE; - morningPeak(); - return this; - } - - public GridSinglePointTaskBuilder morningPeak () { - task.fromTime = LocalTime.of(7, 00).toSecondOfDay(); - task.toTime = LocalTime.of(9, 00).toSecondOfDay(); - return this; - } - - public GridSinglePointTaskBuilder departureTimeWindow(int startHour, int startMinute, int durationMinutes) { - task.fromTime = LocalTime.of(startHour, startMinute).toSecondOfDay(); - task.toTime = LocalTime.of(startHour, startMinute + durationMinutes).toSecondOfDay(); - return this; - } - - public GridSinglePointTaskBuilder maxRides(int rides) { - task.maxRides = rides; - return this; - } - - /** - * Even if you're not actually using the opportunity count, you should call this to set the grid extents on the - * resulting task. Otherwise it will fail checks on the grid dimensions and zoom level. - */ - public GridSinglePointTaskBuilder uniformOpportunityDensity (double density) { - Grid grid = gridLayout.makeUniformOpportunityDataset(density); - task.destinationPointSets = new PointSet[] { grid }; - task.destinationPointSetKeys = new String[] { "GRID" }; - - // In a single point task, the grid of destinations is given with these fields, not from the pointset object. - // The destination point set (containing the opportunity densities) must then match these same dimensions. - task.zoom = grid.extents.zoom; - task.north = grid.extents.north; - task.west = grid.extents.west; - task.width = grid.extents.width; - task.height = grid.extents.height; - - return this; - } - - public GridSinglePointTaskBuilder monteCarloDraws (int draws) { - task.monteCarloDraws = draws; - return this; - } - - public AnalysisWorkerTask build () { - return task; - } - -} diff --git a/src/test/java/com/conveyal/r5/analyst/network/RandomFrequencyPhasingTests.java b/src/test/java/com/conveyal/r5/analyst/network/RandomFrequencyPhasingTests.java index 15370f3e7..9dbaa2ff6 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/RandomFrequencyPhasingTests.java +++ b/src/test/java/com/conveyal/r5/analyst/network/RandomFrequencyPhasingTests.java @@ -52,7 +52,7 @@ public void testFilteredTripRandomization () throws Exception { .weekendMorningPeak() .setOrigin(20, 20) .monteCarloDraws(1000) - .uniformOpportunityDensity(10) + .singleFreeformDestination(0, 0) .build(); TravelTimeComputer computer = new TravelTimeComputer(task, network); diff --git a/src/test/java/com/conveyal/r5/analyst/network/SimpsonDesertTests.java b/src/test/java/com/conveyal/r5/analyst/network/SimpsonDesertTests.java index c6e612778..5330463eb 100644 --- a/src/test/java/com/conveyal/r5/analyst/network/SimpsonDesertTests.java +++ b/src/test/java/com/conveyal/r5/analyst/network/SimpsonDesertTests.java @@ -12,12 +12,9 @@ import java.io.FileOutputStream; import java.time.LocalTime; -import java.util.Arrays; import java.util.HashMap; -import java.util.List; import java.util.Map; -import static org.junit.jupiter.api.Assertions.assertArrayEquals; import static org.junit.jupiter.api.Assertions.assertTrue; /** @@ -26,8 +23,11 @@ * version to the next of R5 (a form of snapshot testing) this checks that they match theoretically expected travel * times given headways, transfer points, distances, common trunks and competing lines, etc. * - * TODO Option to align street grid exactly with sample points in WebMercatorGridPointSet to eliminate walking time - * between origin and destination and transit stops or street intersections. Also check splitting. + * Originally we were using web Mercator gridded destinations, as this was the only option in single point tasks. + * Because these tests record travel time distributions at the destinations using a large number of Monte Carlo draws, + * this was doing a lot of work and storing a lot of data for up to thousands of destinations we weren't actually using. + * Regional tasks with freeform destinations are now used to measure travel times to a limited number of points. + * This could be extended to use gridded destination PointSets for future tests. */ public class SimpsonDesertTests { @@ -49,7 +49,7 @@ public void testGridScheduled () throws Exception { AnalysisWorkerTask task = gridLayout.newTaskBuilder() .weekdayMorningPeak() .setOrigin(20, 20) - .uniformOpportunityDensity(10) + .singleFreeformDestination(40, 40) .build(); TravelTimeComputer computer = new TravelTimeComputer(task, network); @@ -58,18 +58,15 @@ public void testGridScheduled () throws Exception { // Write travel times to Geotiff for debugging visualization in desktop GIS: // toGeotiff(oneOriginResult, task); - int destination = gridLayout.pointIndex(task, 40, 40); - int[] travelTimePercentiles = oneOriginResult.travelTimes.getTarget(destination); - // Transit takes 30 seconds per block. Mean wait time is 10 minutes. Any trip takes one transfer. // 20+20 blocks at 30 seconds each = 20 minutes. Two waits at 0-20 minutes each, mean is 20 minutes. - // Board slack is 2 minutes. With pure frequency routes total should be 24 to 64 minutes, median 44. - // However, these are not pure frequencies, but synchronized such that the transfer wait is always 10 minutes. - // So scheduled range is expected to be 2 minutes slack, 0-20 minutes wait, 10 minutes ride, 10 minutes wait, - // 10 minutes ride, giving 32 to 52 minutes. - // Maybe codify this estimation logic as a TravelTimeEstimate.waitWithHeadaway(20) etc. - DistributionTester.assertUniformlyDistributed(travelTimePercentiles, 32, 52); - + // Board slack is 1 minute. These are not pure frequencies, but synchronized such that the transfer wait is + // always 10 minutes. So scheduled range is expected to be 1 minute slack, 0-20 minutes wait, 10 minutes ride, + // 10 minutes wait, 10 minutes ride, giving 31 to 51 minutes. + // This estimation logic could be better codified as something like TravelTimeEstimate.waitWithHeadaway(20) etc. + // TODO: For some reason observed is dealyed by 1 minute. Figure out why, perhaps due to integer minute binning. + Distribution expected = new Distribution(31, 20).delay(1); + expected.multiAssertSimilar(oneOriginResult.travelTimes, 0); } /** @@ -88,22 +85,21 @@ public void testGridFrequency () throws Exception { AnalysisWorkerTask task = gridLayout.newTaskBuilder() .weekdayMorningPeak() .setOrigin(20, 20) - .uniformOpportunityDensity(10) + .singleFreeformDestination(40, 40) .build(); TravelTimeComputer computer = new TravelTimeComputer(task, network); OneOriginResult oneOriginResult = computer.computeTravelTimes(); - int destination = gridLayout.pointIndex(task, 40, 40); - int[] travelTimePercentiles = oneOriginResult.travelTimes.getTarget(destination); - - // Frequency travel time reasoning is similar to scheduled test method. - // But transfer time is variable from 0...20 minutes. - // Frequency range is expected to be 2x 2 minutes slack, 2x 0-20 minutes wait, 2x 10 minutes ride, - // giving 24 to 64 minutes. - Distribution ride = new Distribution(2, 20); + // int destination = gridLayout.pointIndex(task, 40, 40); + int destination = 0; + + // Reasoning behind frequency-based travel time is similar to that in the scheduled test method, but transfer + // time is variable from 0 to 20 minutes. Expected to be 2x 10 minutes riding, with 2x 1-21 minutes waiting + // (including 1 minute board slack). The result is a triangular distribution tapering up from 22 to 42, and + // back down to 62. + Distribution ride = new Distribution(1, 20); Distribution expected = Distribution.convolution(ride, ride).delay(20); - - DistributionTester.assertExpectedDistribution(expected, travelTimePercentiles); + expected.multiAssertSimilar(oneOriginResult.travelTimes, destination); } /** @@ -123,28 +119,24 @@ public void testGridFrequencyAlternatives () throws Exception { AnalysisWorkerTask task = gridLayout.newTaskBuilder() .weekdayMorningPeak() .setOrigin(20, 20) - .uniformOpportunityDensity(10) - .monteCarloDraws(20000) + .singleFreeformDestination(40, 40) + .monteCarloDraws(10000) .build(); TravelTimeComputer computer = new TravelTimeComputer(task, network); OneOriginResult oneOriginResult = computer.computeTravelTimes(); - int destination = gridLayout.pointIndex(task, 40, 40); - int[] travelTimePercentiles = oneOriginResult.travelTimes.getTarget(destination); // FIXME convolving new Distribution(2, 10) with itself and delaying 20 minutes is not the same // as convolving new Distribution(2, 10).delay(10) with itself, but it should be. - Distribution rideA = new Distribution(2, 10).delay(10); - Distribution rideB = new Distribution(2, 20).delay(10); + Distribution rideA = new Distribution(1, 10).delay(10); + Distribution rideB = new Distribution(1, 20).delay(10); Distribution twoRideAsAndWalk = Distribution.convolution(rideA, rideA); Distribution twoRideBsAndWalk = Distribution.convolution(rideB, rideB); - Distribution twoAlternatives = Distribution.or(twoRideAsAndWalk, twoRideBsAndWalk).delay(3); + // TODO identify source of apparent 0.5 minute delay + Distribution twoAlternatives = Distribution.or(twoRideAsAndWalk, twoRideBsAndWalk).delay(1); // Compare expected and actual - Distribution observed = Distribution.fromTravelTimeResult(oneOriginResult.travelTimes, destination); - - twoAlternatives.assertSimilar(observed); - DistributionTester.assertExpectedDistribution(twoAlternatives, travelTimePercentiles); + twoAlternatives.multiAssertSimilar(oneOriginResult.travelTimes,0); } /** @@ -172,6 +164,7 @@ private static double[] pathTimesAsMinutes (PathResult.PathIterations paths) { @Test public void testOvertakingCases () throws Exception { GridLayout gridLayout = new GridLayout(SIMPSON_DESERT_CORNER, 100); + // TODO refactor this in immutable/fluent style "addScheduledRoute" gridLayout.addHorizontalRoute(50); gridLayout.routes.get(0).startTimes = new int[] { LocalTime.of(7, 10).toSecondOfDay(), // Trip A @@ -184,44 +177,39 @@ public void testOvertakingCases () throws Exception { gridLayout.routes.get(0).hopTimeScaling = hopTimeScaling; TransportNetwork network = gridLayout.generateNetwork(); - // 1. Standard rider: upstream overtaking means Trip B departs origin first and is fastest to destination. - AnalysisWorkerTask standardRider = gridLayout.newTaskBuilder() + // 0. Reuse this task builder to produce several tasks. See caveats on build() method. + GridRegionalTaskBuilder taskBuilder = gridLayout.newTaskBuilder() .departureTimeWindow(7, 0, 5) .maxRides(1) .setOrigin(30, 50) - .setDestination(42, 50) - .uniformOpportunityDensity(10) - .build(); + .singleFreeformDestination(42, 50); + // 1. Standard rider: upstream overtaking means Trip B departs origin first and is fastest to destination. + AnalysisWorkerTask standardRider = taskBuilder.build(); OneOriginResult standardResult = new TravelTimeComputer(standardRider, network).computeTravelTimes(); - List standardPaths = standardResult.paths.getPathIterationsForDestination(); - // Trip B departs stop 30 at 7:35. So 30-35 minute wait, plus ~5 minute ride and ~5 minute egress leg - assertArrayEquals(new double[]{45.0, 44.0, 43.0, 42.0, 41.0}, pathTimesAsMinutes(standardPaths.get(0)), 0.3); + // Trip B departs stop 30 at 7:35. So 30-35 minute wait, plus 7 minute ride. + Distribution standardExpected = new Distribution(30, 5).delay(7); + standardExpected.multiAssertSimilar(standardResult.travelTimes, 0); // 2. Naive rider: downstream overtaking means Trip A departs origin first but is not fastest to destination. - AnalysisWorkerTask naiveRider = gridLayout.copyTask(standardRider) - .setOrigin(10, 50) - .build(); - + AnalysisWorkerTask naiveRider = taskBuilder.setOrigin(10, 50).build(); OneOriginResult naiveResult = new TravelTimeComputer(naiveRider, network).computeTravelTimes(); - List naivePaths = naiveResult.paths.getPathIterationsForDestination(); - // Trip A departs stop 10 at 7:15. So 10-15 minute wait, plus ~35 minute ride and ~5 minute egress leg - assertArrayEquals(new double[]{54.0, 53.0, 52.0, 51.0, 50.0}, pathTimesAsMinutes(naivePaths.get(0)), 0.3); + // Trip A departs stop 10 at 7:15. So 10-15 minute wait, plus 36 minute ride. + Distribution naiveExpected = new Distribution(10, 5).delay(36); + naiveExpected.multiAssertSimilar(naiveResult.travelTimes, 0); // 3. Savvy rider (look-ahead abilities from starting the trip 13 minutes later): waits to board Trip B, even // when boarding Trip A is possible - AnalysisWorkerTask savvyRider = gridLayout.copyTask(naiveRider) - .departureTimeWindow(7, 13, 5) - .build(); - + AnalysisWorkerTask savvyRider = taskBuilder + .departureTimeWindow(7, 13, 5).build(); OneOriginResult savvyResult = new TravelTimeComputer(savvyRider, network).computeTravelTimes(); - List savvyPaths = savvyResult.paths.getPathIterationsForDestination(); - // Trip B departs stop 10 at 7:25. So 8-12 minute wait, plus ~16 minute ride and ~5 minute egress leg - assertArrayEquals(new double[]{32.0, 31.0, 30.0, 29.0, 28.0}, pathTimesAsMinutes(savvyPaths.get(0)), 0.3); + // Trip B departs stop 10 at 7:25. So 8-13 minute wait, plus 16 minute ride. + Distribution savvyExpected = new Distribution(8, 5).delay(16); + savvyExpected.multiAssertSimilar(savvyResult.travelTimes, 0); } /** - * Experiments + * Experiments with verifying more complicated distributions. */ @Test public void testExperiments () throws Exception { @@ -236,25 +224,20 @@ public void testExperiments () throws Exception { AnalysisWorkerTask task = gridLayout.newTaskBuilder() .weekdayMorningPeak() .setOrigin(20, 20) - .uniformOpportunityDensity(10) - .monteCarloDraws(4000) + .singleFreeformDestination(80, 80) + .monteCarloDraws(10000) .build(); OneOriginResult oneOriginResult = new TravelTimeComputer(task, network).computeTravelTimes(); - int pointIndex = gridLayout.pointIndex(task, 80, 80); - int[] travelTimePercentiles = oneOriginResult.travelTimes.getTarget(pointIndex); // Each 60-block ride should take 30 minutes (across and up). - // Two minutes board slack, and 20-minute headways. Add one minute walking. - Distribution ride = new Distribution(2, 20).delay(30); + // One minute board slack, and 20-minute headways. + Distribution ride = new Distribution(1, 20).delay(30); Distribution tripleCommonTrunk = Distribution.or(ride, ride, ride); Distribution endToEnd = Distribution.convolution(tripleCommonTrunk, ride); // Compare expected and actual - Distribution observed = Distribution.fromTravelTimeResult(oneOriginResult.travelTimes, pointIndex); - - endToEnd.assertSimilar(observed); - DistributionTester.assertExpectedDistribution(endToEnd, travelTimePercentiles); + endToEnd.multiAssertSimilar(oneOriginResult.travelTimes, 0); } /** Write travel times to GeoTiff. Convenience method to help visualize results in GIS while developing tests. */ diff --git a/src/test/java/com/conveyal/r5/analyst/scenario/ModifyStreetsTest.java b/src/test/java/com/conveyal/r5/analyst/scenario/ModifyStreetsTest.java index 29b85c54c..533e08606 100644 --- a/src/test/java/com/conveyal/r5/analyst/scenario/ModifyStreetsTest.java +++ b/src/test/java/com/conveyal/r5/analyst/scenario/ModifyStreetsTest.java @@ -83,12 +83,12 @@ private static TIntIntMap getReachedVertices(TransportNetwork network) { task.fromLat = FROM_LAT; task.fromLon = FROM_LON; - WebMercatorGridPointSet gps = new WebMercatorGridPointSet(network); - task.north = gps.north; - task.west = gps.west; - task.height = gps.height; - task.width = gps.width; - task.zoom = gps.zoom; + WebMercatorGridPointSet grid = new WebMercatorGridPointSet(network); + task.north = grid.extents.north; + task.west = grid.extents.west; + task.height = grid.extents.height; + task.width = grid.extents.width; + task.zoom = grid.extents.zoom; var streetRouter = new StreetRouter(network.streetLayer); streetRouter.profileRequest = task; diff --git a/src/test/resources/com/conveyal/data/census/integrationTest.zip b/src/test/resources/com/conveyal/data/census/integrationTest.zip index 9b9ea2fee..e115df979 100644 Binary files a/src/test/resources/com/conveyal/data/census/integrationTest.zip and b/src/test/resources/com/conveyal/data/census/integrationTest.zip differ