add the internal marklatest api #15336

GnsP · 2023-09-27T05:09:28Z

This PR adds:

Support for a query param skipMakingLatest in the PUT api/v3internal/namespaces/:namespace/apps/:appId . When this param is true, the application is deployed, but it's not marked as latest.
Adds an internal api api/v3internal/namespaces/:namespace/apps/markLatest. This api takes a list of appIds (with versionIds) and marks the specified versions of the apps as latest.

JIRA: CDAP-20857

cdap-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandler.java

cdap-app-fabric/src/main/java/io/cdap/cdap/app/store/Store.java

...ic/src/main/java/io/cdap/cdap/internal/app/deploy/pipeline/ApplicationRegistrationStage.java

...app-fabric/src/main/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleService.java

albertshau

the unit tests should be focused on the DefaultStore implementation. There should be a bunch of test cases added in DefaultStoreTest ensuring nothing breaks with this new paradigm where 'isLatest' no longer means the most recently added version. For example, I'm not sure if there is any logic somewhere that is making that assumption that now break.

albertshau · 2023-10-10T03:46:28Z

cdap-app-fabric/src/main/java/io/cdap/cdap/app/store/Store.java

+   * Marks an existing application as latest
+   *
+   * @param id            application id
+   * @throws Exception if the app cannot be marked latest


avoid throws Exception, it makes it impossible for the caller to do properly error handling (there are existing examples of this in the code already, but they are bad examples). Any exception that is thrown should be more specific.

Should also clearly define the expected behavior in certain edge cases. For example, what should happen if one of the provided application ids doesn't exist? What if multiple versions of the same application are given?

Added more specific exceptions.
The multiple versions exception is handled in the service layer.

javadoc throws needs to be updated

also, it should define behavior in some of the edge cases like I mentioned above. For example, what happens if a given application does not exist? Does it get ignored? Does it throw some sort of Exception?

From a SCM batch pull perspective, this would happen if in the middle of the operation we deployed a new non-latest version of an app, and then somebody goes and deletes the app before we get to this mark latest part.

Now it throws ApplicationNotFoundException in this case.

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AbstractAppLifecycleHttpHandler.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AbstractAppLifecycleHttpHandler.java

albertshau · 2023-10-10T03:56:39Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+    }
+  }
+
+  private BodyConsumer deployAppFromArtifact(final ApplicationId appId, final boolean skipMakingLatest)


this looks like duplicate code, can it be put in the abstract class? or are there logical differences between them?

I had considered to put it in the abstract class. But there was a minor difference between the internal and public implementations (in case of access validations). Will try and refactor it.

Just adding a TODO with a JIRA task for now. Will take it up in the AppLifecycleService cleanup PR.

The question was never answered, is this duplicate code or is it different some how? If it is different, please highlight what is changed and why. If it's the same, we should just move it now and not have a todo.

moved to the base class and updated usage.

...app-fabric/src/main/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleService.java

cdap-proto/src/test/java/io/cdap/cdap/proto/app/AppMarkLatestRequestTest.java

albertshau · 2023-10-11T19:06:40Z

cdap-app-fabric/src/main/java/io/cdap/cdap/app/store/Store.java

+   * Marks an existing application as latest
+   *
+   * @param id            application id
+   * @throws Exception if the app cannot be marked latest


javadoc throws needs to be updated

albertshau · 2023-10-11T19:09:21Z

cdap-app-fabric/src/main/java/io/cdap/cdap/app/store/Store.java

+   * Marks an existing application as latest
+   *
+   * @param id            application id
+   * @throws Exception if the app cannot be marked latest


also, it should define behavior in some of the edge cases like I mentioned above. For example, what happens if a given application does not exist? Does it get ignored? Does it throw some sort of Exception?

From a SCM batch pull perspective, this would happen if in the middle of the operation we deployed a new non-latest version of an app, and then somebody goes and deletes the app before we get to this mark latest part.

cdap-app-fabric/src/main/java/io/cdap/cdap/app/store/Store.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AbstractAppLifecycleHttpHandler.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/ApplicationMeta.java

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/DefaultStore.java

albertshau

there are still no tests for the actual logic that was added around changing the state in the Store.

There are also a lot of repeat comments. Please make sure to address all comments before the next review.

albertshau · 2023-10-17T23:29:11Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+    }
+  }
+
+  private BodyConsumer deployAppFromArtifact(final ApplicationId appId, final boolean skipMakingLatest)


The question was never answered, is this duplicate code or is it different some how? If it is different, please highlight what is changed and why. If it's the same, we should just move it now and not have a todo.

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

...app-fabric/src/main/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleService.java

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/DefaultStore.java

cdap-proto/src/test/java/io/cdap/cdap/proto/app/AppVersionTest.java

cdap-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandler.java

samdgupi · 2023-10-18T17:25:22Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

@@ -200,4 +219,72 @@ public void getAppDetailForVersion(HttpRequest request, HttpResponder responder,
        : applicationLifecycleService.getAppDetail(appId);
    responder.sendJson(HttpResponseStatus.OK, GSON.toJson(appDetail));
  }
+
+  /**
+   * Deploy an application.


Please mention why we have to deploy methods one inetrnally one externally

Updated the javadoc comment and mentioned why this internal API is needed.

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AbstractAppLifecycleHttpHandler.java

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

...app-fabric/src/main/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleService.java

albertshau · 2023-10-18T17:10:27Z

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

+    StructuredTable appSpecTable = getApplicationSpecificationTable();
+
+    // First unmark the current latest version
+    ApplicationMeta latest = getLatest(id.getAppReference());


getLatest reads the entire row and deserializes into ApplicationMeta, which is more expensive than needed. It also has a bunch of extra reads to handle rows that were in the table before the isLatest column was added.

For this method, none of that extra logic is needed. We just need to use the StructuredTable.update() method to first set whatever has isLatest == true to false, and then to set isLatest to true for the id given.

for the existence check, I don't remember if trying to update a row that doesn't exist ends up throwing an exception or if it becomes a no-op. If it's a no-op and we still need to do the read, we should be using StructuredTable.read() on just the relevant fields without deserializing anything into an ApplicationMeta.

the update method does not throw an exception when the row does not exist. It's a no-op in that case.

Updated the code to read the application row to check if it exists already.

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

cdap-proto/src/test/java/io/cdap/cdap/proto/app/AppVersionTest.java

samdgupi · 2023-10-18T17:26:46Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+      @QueryParam("skipMakingLatest") final boolean skipMakingLatest)
+      throws BadRequestException, NamespaceNotFoundException, AccessException {
+    String versionId = ApplicationId.DEFAULT_VERSION;
+    if (Feature.LIFECYCLE_MANAGEMENT_EDIT.isEnabled(featureFlagsProvider)) {


Please add a new feature flag for promotion to prod and only enable this api if that featurev flag is switched on

Added feature flag.

As discussed in this comment, the feature flag check is not needed here.

...-fabric/src/main/java/io/cdap/cdap/internal/app/services/SourceControlManagementService.java

...app-fabric/src/main/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleService.java

cdap-proto/src/main/java/io/cdap/cdap/proto/app/package-info.java

cdap-proto/src/test/java/io/cdap/cdap/proto/app/AppVersionTest.java

cdap-proto/src/test/java/io/cdap/cdap/proto/app/MarkLatestAppsRequestTest.java

albertshau · 2023-10-20T05:51:07Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+      @PathParam("namespace-id") final String namespaceId,
+      @PathParam("app-id") final String appId,
+      @QueryParam("skipMarkingLatest") final boolean skipMarkingLatest) throws Exception {
+    if (!Feature.PIPELINE_PROMOTION_TO_PRODUCTION.isEnabled(featureFlagsProvider)) {


we don't need these flags to protect internal APIs, these are normally only done for user facing APIs

albertshau · 2023-10-20T05:51:51Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+  @Path("/apps/markLatest")
+  public void markApplicationsAsLatest(FullHttpRequest request, HttpResponder responder,
+      @PathParam("namespace-id") final String namespace) throws Exception {
+    if (!Feature.PIPELINE_PROMOTION_TO_PRODUCTION.isEnabled(featureFlagsProvider)) {


similar comment, don't need to do this for an internal API

albertshau · 2023-10-20T05:55:20Z

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

+    // First find and unmark the current latest version
+    Range latestRange = getLatestApplicationRange(id.getAppReference());
+    try (CloseableIterator<StructuredRow> iterator =
+        appSpecTable.scan(latestRange, 1, StoreDefinition.AppMetadataStore.CREATION_TIME_FIELD,


shouldn't need to scan with a range here, this should just be a read() call on getLatestApplicationKeys().

There is a scan happening elsewhere in the code to handle old rows that were from before the isLatest column existed.

The read method expects a list of fields where the keys are prefix of the primary keys (in this case, the the list of keys for the read operation should be a prefix of the primary keys [namespace, application, version]).

The getLatestApplicationKeys() method returns the list of fields [namespace, application, latest], which is not a prefix of the primary keys. So, the read method throws an error io.cdap.cdap.spi.data.InvalidFieldException.

As we do not know the version of the current latest beforehand, we need to scan the table to find the current latest version with the key range [namespace, application, latest]. Then only we can update the corresponding row to set the latest column to false.

hm it should really allow primary key fields and index fields in there.

In that case, we should be using the scan(range, limit, filter) method, as we don't need to order by anything.

Updated to use the scan(range, limit, filterIndexes) method.

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

albertshau · 2023-10-20T05:59:18Z

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

+
+    // check if the application being marked latest is already present in the table
+    // if not, then an ApplicationNotFoundException should be thrown
+    List<Field<?>> fields = getApplicationPrimaryKeys(id);


this existence check should happen first to avoid any unnecessary work if it doesn't exist.

moved this check to the top, so that it can error out early (before the rather expensive scan operation is performed).

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/AppMetadataStore.java

albertshau · 2023-10-20T06:04:52Z

...fabric/src/test/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleServiceTest.java

+    Assert.assertEquals(appName, appDetail.getName());
+    Assert.assertEquals(ApplicationId.DEFAULT_VERSION, appDetail.getAppVersion());
+
+    setPromotionToProdFlag(false);


don't do stateful things like this in unit tests. If this test fails above, it won't reset anything and will break all the other tests in this class.

Instead, set the "normal" state in a @Before method to ensure it is always set for each test. If a test requires a flag to be set to a different value, do it at the start of the test.

that being said, I don't think there is any need to set this in the test, just make it default to enabled. We're not impacting any of the existing logic with these new APIs.

done.

I have removed the promotionToProd flag as it's not necessary for internal APIs.

albertshau · 2023-10-20T06:06:54Z

cdap-app-fabric/src/test/java/io/cdap/cdap/internal/app/store/DefaultStoreTest.java

+    ApplicationId appId = new ApplicationId("account1", "app1");
+    ApplicationMeta appMeta = new ApplicationMeta("app1", Specifications.from(new FooApp()),
+        new ChangeDetail(null, null, null,
+            System.currentTimeMillis()), null, false);


don't use values like current time in unit tests, as you can never compare them to expected values.

Updated the tests to store the creation time as a variable (instead of passing the value directly) so that we can compare it with the actual value when needed.

albertshau · 2023-10-20T06:07:14Z

cdap-app-fabric/src/test/java/io/cdap/cdap/internal/app/store/DefaultStoreTest.java

+    store.addApplication(appId, appMeta);
+
+    ApplicationMeta storedMeta = store.getApplicationMetadata(appId);
+    Assert.assertNotNull(storedMeta);


assertNotNull is not good enough, it should be checking the actual data.

similar comment for all the other tests

removed the null checks and added checks to verify the actual metadata.

albertshau · 2023-10-20T06:08:38Z

cdap-features/src/main/java/io/cdap/cdap/features/Feature.java

@@ -41,7 +41,8 @@ public enum Feature {
  WRANGLER_PRECONDITION_SQL("6.9.1"),
  WRANGLER_EXECUTION_SQL("6.10.0"),
  WRANGLER_SCHEMA_MANAGEMENT("6.10.0"),
-  NAMESPACED_SERVICE_ACCOUNTS("6.10.0");
+  NAMESPACED_SERVICE_ACCOUNTS("6.10.0"),
+  PIPELINE_PROMOTION_TO_PRODUCTION("6.10.0");


should not name the feature something vague like this, it should be specific to the actual functionality being controlled. In this case, it is controlling whether bulk source control operations are enabled.

Removed the flag from this PR. As mentioned in this comment we do not need feature guards for internal APIs.

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AbstractAppLifecycleHttpHandler.java

samdgupi · 2023-10-20T08:24:47Z

...-app-fabric/src/main/java/io/cdap/cdap/gateway/handlers/AppLifecycleHttpHandlerInternal.java

+   * @param responder {@link HttpResponder}
+   * @param namespaceId of the namespace where the app is to be deployed
+   * @param appId of the app
+   * @param skipMarkingLatest if true, the app will be deployed but not marked latest


nit: Please mention what marking latest means. i.e the latest marked version is the one that will be run

samdgupi · 2023-10-20T08:34:04Z

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/DefaultStore.java

+      for (ApplicationId appId : appIds) {
+        mds.updateLatestApplicationVersion(appId);
+      }
+    }, IOException.class, ApplicationNotFoundException.class);


@GnsP I thought we want to skip missing versions and continue marking rest of them latest ?

That was for the updateGitMeta. In case of marking latest, if any of the apps are not marked latest then the entire operation should fail. Because there may be dependencies between pipelines/apps.

Makes sense thanks

samdgupi · 2023-10-20T08:34:48Z

...fabric/src/test/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleServiceTest.java

@@ -109,6 +119,16 @@ public static void stop() {
    AppFabricTestHelper.shutdown();
  }

+  private void setPromotionToProdFlag(boolean promotionToProdFlag) {


Remove this as we are removing the flag check in the api calls

This has been removed in the latest commit. Need to push the changes after the build is verified locally.

samdgupi · 2023-10-20T12:23:17Z

cdap-app-fabric/src/main/java/io/cdap/cdap/internal/app/store/DefaultStore.java

+      for (ApplicationId appId : appIds) {
+        mds.updateLatestApplicationVersion(appId);
+      }
+    }, IOException.class, ApplicationNotFoundException.class);


Makes sense thanks

samdgupi · 2023-10-20T12:24:43Z

...fabric/src/test/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleServiceTest.java

+
+  @Test
+  public void testMarkAppsAsLatest() throws Exception {
+    setLcmEditFlag(false);


Why are we setting lcm as false here ? without lcm marklatest has no usecase

Updated the test and removed the line setting lcmEditFlag to false.

samdgupi · 2023-10-20T12:28:46Z

...fabric/src/test/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleServiceTest.java

+    HttpResponse resp = deployWithoutMarkingLatest(
+        appId, new AppRequest<>(ArtifactSummary.from(artifactId.toArtifactId())));
+    Assert.assertEquals(200, resp.getResponseCode());
+


Can you please put a comment here why ApplicationNotFoundException is expected here. Usually happy path tests should not have exception check so having a comment would be useful for future contributors.

Also this tests a new app I believe? We also need to check adding versions for a existing app

We should also verify the version was actually created with latest field as false

As discussed offline, I have added comments describing the intended behaviour of the test.

samdgupi · 2023-10-20T12:32:26Z

cdap-app-fabric/src/test/java/io/cdap/cdap/internal/app/store/DefaultStoreTest.java

+  @Test
+  public void testAddApplicationWithoutMarkingLatest()
+      throws ConflictException {
+    long creationTime = System.currentTimeMillis();


nit: I dont think you dont need to create this everytime. This can be a class level final value

Agreed. But (for now) I would rather keep these values isolated (contained within the context of each test) without adding class level variables.

samdgupi · 2023-10-20T12:33:06Z

...fabric/src/test/java/io/cdap/cdap/internal/app/services/ApplicationLifecycleServiceTest.java

+                new AppVersion(appName, ApplicationId.DEFAULT_VERSION))
+        ));
+  }
+


We should also have a partial failure test

We do have a partial failure testcase. Now I have added javadoc comments on each of the test methods, so that it's easier to check the intended behaviour (verification) of each test.

Also added the testcase that we discussed in the meeting (with 2 versions of the same application deployed one after another, then the later/second version marked as latest).

samdgupi

LGTM as long as the comments are followed up. Please resolve the build issue

albertshau

just one comment about the scan, otherwise lgtm. Please squash commits before merging.

…to deploy api

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Implement SCM Pull LRO #15364

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add the internal marklatest api and add skipMakingLatest query param …

e783c61

…to deploy api

GnsP force-pushed the scm-mark-latest-api branch from 851cdf9 to e783c61 Compare October 21, 2023 15:36

GnsP merged commit cd8f7a1 into cdapio:develop Oct 24, 2023
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GnsP mentioned this pull request Nov 8, 2023

Fix the null pointer exception caused by unsafe unboxing of Boolean #15410

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add the internal marklatest api #15336

add the internal marklatest api #15336

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GnsP commented Sep 27, 2023 • edited by jira bot Loading

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GnsP commented Sep 27, 2023 •

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