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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package crablet.example | ||
|
|
||
| import crablet.AppendCondition | ||
| import crablet.DomainIdentifier | ||
| import crablet.EventName | ||
| import crablet.SequenceNumber | ||
| import crablet.StateId | ||
| import crablet.StateName | ||
| import crablet.StreamQuery | ||
| import crablet.postgres.CrabletEventsAppender | ||
| import crablet.postgres.CrabletStateBuilder | ||
| import io.vertx.core.json.JsonArray | ||
| import io.vertx.core.json.JsonObject | ||
| import java.util.* | ||
|
|
||
| fun main() { | ||
|
|
||
| println("Vertx Pool started") | ||
|
|
||
| val eventsAppender = CrabletEventsAppender(pool) | ||
|
|
||
| val stateBuilder = CrabletStateBuilder( | ||
| client = pool, | ||
| initialState = JsonArray(), | ||
| evolveFunction = { state, event -> state.add(event) }) | ||
|
|
||
| val domainIdentifiers = listOf( | ||
| DomainIdentifier(name = StateName("Account"), id = StateId(UUID.randomUUID().toString())) | ||
| ) | ||
|
|
||
| val streamQuery = StreamQuery( | ||
| identifiers = domainIdentifiers, | ||
| eventTypes = listOf("AccountOpened", "AmountDeposited").map { EventName(it) } | ||
| ) | ||
|
|
||
| val appendCondition = AppendCondition(query = streamQuery, maximumEventSequence = SequenceNumber(0)) | ||
|
|
||
| val eventsToAppend: List<JsonObject> = listOf( | ||
| JsonObject().put("type", "AccountOpened").put("id", 10), | ||
| JsonObject().put("type", "AmountDeposited").put("amount", 100) | ||
| ) | ||
|
|
||
| println("Append operation") | ||
| println("--> eventsToAppend: $eventsToAppend") | ||
| println("--> appendCondition: $appendCondition ") | ||
|
|
||
| // append events | ||
| eventsAppender.appendIf(eventsToAppend, appendCondition) | ||
| .compose { | ||
| // print the resulting sequenceId | ||
| println() | ||
| println("New sequence id ---> $it") | ||
| // now project a state given the past events | ||
| stateBuilder.buildFor(streamQuery) | ||
| } | ||
| .onSuccess { stateResult: Pair<JsonArray, SequenceNumber> -> | ||
| println("New state ---> ${stateResult.first}") | ||
| } | ||
| .onFailure { it.printStackTrace() } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package crablet.postgres | ||
|
|
||
| import io.vertx.pgclient.PgConnectOptions | ||
| import io.vertx.sqlclient.Pool | ||
| import io.vertx.sqlclient.PoolOptions | ||
| import org.testcontainers.containers.PostgreSQLContainer | ||
| import org.testcontainers.utility.MountableFile | ||
|
|
||
| abstract class AbstractCrabletTest { | ||
|
|
||
| companion object { | ||
|
|
||
| val PG_DOCKER_IMAGE = "postgres:latest" | ||
| val DB_NAME = "postgres" | ||
| val DB_USERNAME = "postgres" | ||
| val DB_PASSWORD = "postgres" | ||
|
|
||
| val postgresqlContainer = | ||
| PostgreSQLContainer<Nothing>(PG_DOCKER_IMAGE) | ||
| .apply { | ||
| withDatabaseName(DB_NAME) | ||
| withUsername(DB_USERNAME) | ||
| withPassword(DB_PASSWORD) | ||
| withCopyFileToContainer( | ||
| MountableFile.forClasspathResource("./ddl/1-events_table.sql"), | ||
| "/docker-entrypoint-initdb.d/1-events_table.sql", | ||
| ) | ||
| withCopyFileToContainer( | ||
| MountableFile.forClasspathResource("./ddl/2-append_events.sql"), | ||
| "/docker-entrypoint-initdb.d/2-append_events.sql", | ||
| ) | ||
| withEnv("POSTGRES_LOG_CONNECTIONS", "on") | ||
| withEnv("POSTGRES_LOG_DISCONNECTIONS", "on") | ||
| withEnv("POSTGRES_LOG_DURATION", "on") | ||
| withEnv("POSTGRES_LOG_STATEMENT", "all") | ||
| withEnv("POSTGRES_LOG_DIRECTORY", "/var/log/pg_log") | ||
| withLogConsumer { frame -> println(frame.utf8String) } | ||
| } | ||
|
|
||
| val pool: Pool by lazy { | ||
| postgresqlContainer.start() | ||
| val connectOptions = PgConnectOptions() | ||
| .setPort(if (postgresqlContainer.isRunning) postgresqlContainer.firstMappedPort else 5432) | ||
| .setHost("127.0.0.1") | ||
| .setDatabase(DB_NAME) | ||
| .setUser(DB_USERNAME) | ||
| .setPassword(DB_PASSWORD) | ||
| val poolOptions = PoolOptions().setMaxSize(5) | ||
| Pool.pool(connectOptions, poolOptions) | ||
| } | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package crablet.postgres | ||
|
|
||
| import crablet.AppendCondition | ||
| import crablet.DomainIdentifier | ||
| import crablet.EventName | ||
| import crablet.SequenceNumber | ||
| import crablet.StateId | ||
| import crablet.StateName | ||
| import crablet.StreamQuery | ||
| import io.vertx.core.json.JsonObject | ||
| import io.vertx.junit5.VertxExtension | ||
| import io.vertx.junit5.VertxTestContext | ||
| import org.junit.jupiter.api.Assertions.assertEquals | ||
| import org.junit.jupiter.api.Assertions.assertNotNull | ||
| import org.junit.jupiter.api.BeforeEach | ||
| import org.junit.jupiter.api.Test | ||
| import org.junit.jupiter.api.extension.ExtendWith | ||
| import java.util.* | ||
|
|
||
| @ExtendWith(VertxExtension::class) | ||
| class Scenario2TestAbstract : AbstractCrabletTest() { | ||
|
|
||
| data class Account(val id: Int? = null, val balance: Int = 0) | ||
|
|
||
| lateinit var eventsAppender: CrabletEventsAppender | ||
| lateinit var stateBuilder: CrabletStateBuilder<Account> | ||
| lateinit var appendCondition: AppendCondition | ||
| lateinit var eventsToAppend: List<JsonObject> | ||
| lateinit var streamQuery: StreamQuery | ||
|
|
||
| @BeforeEach | ||
| fun setUp(testContext: VertxTestContext) { | ||
| eventsAppender = CrabletEventsAppender(pool) | ||
| stateBuilder = CrabletStateBuilder( | ||
| client = pool, | ||
| initialState = Account(), | ||
| evolveFunction = { state, event -> | ||
| when (event.getString("type")) { | ||
| "AccountOpened" -> state.copy(id = event.getInteger("id")) | ||
| "AmountDeposited" -> state.copy(balance = state.balance.plus(event.getInteger("amount"))) | ||
| else -> state | ||
| } | ||
| }) | ||
|
|
||
| val domainIdentifiers = listOf( | ||
| DomainIdentifier(name = StateName("Account"), id = StateId(UUID.randomUUID().toString())) | ||
| ) | ||
| streamQuery = StreamQuery( | ||
| identifiers = domainIdentifiers, | ||
| eventTypes = listOf("AccountOpened", "AmountDeposited").map { EventName(it) } | ||
| ) | ||
| appendCondition = AppendCondition(query = streamQuery, maximumEventSequence = SequenceNumber(0)) | ||
| eventsToAppend = listOf( | ||
| JsonObject().put("type", "AccountOpened").put("id", 10), | ||
| JsonObject().put("type", "AmountDeposited").put("amount", 100) | ||
| ) | ||
| testContext.completeNow() | ||
| } | ||
|
|
||
| @Test | ||
| fun testAppendAndBuildState(testContext: VertxTestContext) { | ||
| // Append events and build the state | ||
| eventsAppender.appendIf(eventsToAppend, appendCondition) | ||
| .compose { | ||
| stateBuilder.buildFor(streamQuery) | ||
| } | ||
| .onSuccess { (state, sequence): Pair<Account, SequenceNumber> -> | ||
|
|
||
| assertNotNull(state) | ||
| assertNotNull(sequence) | ||
|
|
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| assertEquals(state.id, 10) | ||
| assertEquals(state.balance, 100) | ||
|
|
||
| // Complete the test context indicating the test passed | ||
| testContext.completeNow() | ||
| } | ||
| .onFailure { it -> | ||
| // Fail the test context indicating the test failed | ||
| testContext.failNow(it) | ||
| } | ||
| } | ||
|
|
||
| } |
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