Examples with AggregateSnapshot uk.gov.justice.domain.snapshot.AggregateSnapshot used on opensource projects

Example 1 with AggregateSnapshot

use of uk.gov.justice.domain.snapshot.AggregateSnapshot in project microservice_framework by CJSCommonPlatform.

the class SnapshotAwareAggregateServiceIT method shouldNotStoreABrandNewSnapshotWhenEventCountInTheStreamReachesThresholdNotMet.

@Test
public void shouldNotStoreABrandNewSnapshotWhenEventCountInTheStreamReachesThresholdNotMet() throws Exception {
    final UUID streamId = randomUUID();
    appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD - 2);
    final Optional<AggregateSnapshot<TestAggregate>> snapshot = snapshotRepository.getLatestSnapshot(streamId, TestAggregate.class);
    assertThat(snapshot, not(nullValue()));
    assertThat(snapshot.isPresent(), equalTo(false));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(23));
    assertThat(rowCount(SQL_EVENT_STREAM_COUNT_BY_STREAM_ID, streamId), is(1));
}

Example 2 with AggregateSnapshot

use of uk.gov.justice.domain.snapshot.AggregateSnapshot in project microservice_framework by CJSCommonPlatform.

the class SnapshotAwareAggregateServiceIT method shouldStoreABrandNewSnapshotWhenEventCountInTheStreamReachesThreshold.

@Test
public void shouldStoreABrandNewSnapshotWhenEventCountInTheStreamReachesThreshold() throws Exception {
    final UUID streamId = randomUUID();
    appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD);
    final Optional<AggregateSnapshot<TestAggregate>> snapshot = snapshotRepository.getLatestSnapshot(streamId, TestAggregate.class);
    final TestAggregate aggregateFromSnapshot = snapshot.get().getAggregate(new DefaultObjectInputStreamStrategy());
    assertThat(snapshot, not(nullValue()));
    assertThat(snapshot.isPresent(), equalTo(true));
    assertThat(snapshot.get().getType(), equalTo(TYPE));
    assertThat(snapshot.get().getStreamId(), equalTo(streamId));
    assertThat(snapshot.get().getVersionId(), equalTo(25L));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(25));
    assertThat(aggregateFromSnapshot.numberOfAppliedEvents(), is(25));
    assertThat(aggregateFromSnapshot.recordedEvents().size(), is(25));
    assertThat(rowCount(SQL_EVENT_STREAM_COUNT_BY_STREAM_ID, streamId), is(1));
}

Example 3 with AggregateSnapshot

use of uk.gov.justice.domain.snapshot.AggregateSnapshot in project microservice_framework by CJSCommonPlatform.

the class SnapshotAwareAggregateServiceIT method shouldCreateNewSnapshotOnAggregateChangeWhenWeHaveMultipleExistingSnapshots.

@Test
public void shouldCreateNewSnapshotOnAggregateChangeWhenWeHaveMultipleExistingSnapshots() throws Exception {
    final Class aggregateClass = TestAggregate.class;
    final UUID streamId = randomUUID();
    final long initialNumberOfSnapshots = 4;
    for (int i = 0; i < initialNumberOfSnapshots; i++) {
        appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD);
    }
    final Optional<AggregateSnapshot> snapshot = snapshotRepository.getLatestSnapshot(streamId, aggregateClass);
    assertThat(snapshot, not(nullValue()));
    assertThat(snapshot.isPresent(), equalTo(true));
    appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD - 2);
    final Optional<AggregateSnapshot> newSnapshot = snapshotRepository.getLatestSnapshot(streamId, aggregateClass);
    assertThat(newSnapshot, not(nullValue()));
    assertThat(newSnapshot.isPresent(), equalTo(true));
    assertThat(newSnapshot.get().getType(), equalTo(aggregateClass.getName()));
    assertThat(newSnapshot.get().getStreamId(), equalTo(streamId));
    assertThat(newSnapshot.get().getVersionId(), equalTo(initialNumberOfSnapshots * SNAPSHOT_THRESHOLD));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(123));
    TestAggregate aggregateFromSnapshot2 = (TestAggregate) newSnapshot.get().getAggregate(new DefaultObjectInputStreamStrategy());
    assertThat(aggregateFromSnapshot2.numberOfAppliedEvents(), is(100));
    assertThat(rowCount(SQL_EVENT_STREAM_COUNT_BY_STREAM_ID, streamId), is(1));
}

Example 4 with AggregateSnapshot

use of uk.gov.justice.domain.snapshot.AggregateSnapshot in project microservice_framework by CJSCommonPlatform.

the class SnapshotAwareAggregateServiceIT method shouldRebuildSnapshotOnAggregateModelChange.

@Test
public void shouldRebuildSnapshotOnAggregateModelChange() throws Exception {
    final UUID streamId = randomUUID();
    final DynamicAggregateTestClassGenerator classGenerator = new DynamicAggregateTestClassGenerator();
    final Class oldAggregateClass = classGenerator.generatedTestAggregateClassOf(1L, TEST_AGGREGATE_PACKAGE, TEST_AGGREGATE_CLASS_NAME);
    final long initialNumberOfSnapshots = 4;
    for (int i = 1; i <= initialNumberOfSnapshots; i++) {
        createEventStreamAndApply(streamId, SNAPSHOT_THRESHOLD, "context.eventA", oldAggregateClass);
    }
    final Optional<AggregateSnapshot> snapshot = snapshotRepository.getLatestSnapshot(streamId, oldAggregateClass);
    assertThat(snapshot, not(nullValue()));
    assertThat(snapshot.isPresent(), equalTo(true));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(100));
    final Class newAggregateClass = classGenerator.generatedTestAggregateClassOf(2L, TEST_AGGREGATE_PACKAGE, TEST_AGGREGATE_CLASS_NAME);
    snapshotService.setStreamStrategy(new CustomClassLoaderObjectInputStreamStrategy(classLoaderWithGeneratedAggregateLoaded()));
    createEventStreamAndApply(streamId, SNAPSHOT_THRESHOLD - 2, "context.eventA", newAggregateClass);
    final Optional<AggregateSnapshot> newSnapshot = snapshotRepository.getLatestSnapshot(streamId, newAggregateClass);
    assertThat(newSnapshot, not(nullValue()));
    assertThat(newSnapshot.isPresent(), equalTo(true));
    assertThat(newSnapshot.get().getType(), equalTo(newAggregateClass.getName()));
    assertThat(newSnapshot.get().getStreamId(), equalTo(streamId));
    assertThat(newSnapshot.get().getVersionId(), equalTo(123L));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(123));
    assertThat(rowCount(SQL_EVENT_STREAM_COUNT_BY_STREAM_ID, streamId), is(1));
}

Example 5 with AggregateSnapshot

use of uk.gov.justice.domain.snapshot.AggregateSnapshot in project microservice_framework by CJSCommonPlatform.

the class SnapshotAwareAggregateServiceIT method shouldNotCreateNewSnapshotOnAggregateChangeWhenWeJustOneExistingSnapshots.

@Test
public void shouldNotCreateNewSnapshotOnAggregateChangeWhenWeJustOneExistingSnapshots() throws Exception {
    final Class aggregateClass = TestAggregate.class;
    final UUID streamId = randomUUID();
    appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD);
    final Optional<AggregateSnapshot> snapshot = snapshotRepository.getLatestSnapshot(streamId, aggregateClass);
    assertThat(snapshot, not(nullValue()));
    assertThat(snapshot.isPresent(), equalTo(true));
    final EventStream updatedStream = eventSource.getStreamById(streamId);
    appendEventsViaAggregate(streamId, SNAPSHOT_THRESHOLD - 2);
    final Optional<AggregateSnapshot<TestAggregate>> snapshotChanged = snapshotRepository.getLatestSnapshot(streamId, aggregateClass);
    assertThat(snapshotChanged, not(nullValue()));
    assertThat(snapshotChanged.isPresent(), equalTo(true));
    assertThat(snapshotChanged.get().getType(), equalTo(aggregateClass.getName()));
    assertThat(snapshotChanged.get().getStreamId(), equalTo(streamId));
    assertThat(snapshotChanged.get().getVersionId(), equalTo(25L));
    assertThat(rowCount(SQL_EVENT_LOG_COUNT_BY_STREAM_ID, streamId), is(48));
    final TestAggregate aggregateFromSnapshot = snapshotChanged.get().getAggregate(new DefaultObjectInputStreamStrategy());
    assertThat(aggregateFromSnapshot.numberOfAppliedEvents(), is(25));
    assertThat(rowCount(SQL_EVENT_STREAM_COUNT_BY_STREAM_ID, streamId), is(1));
}