@Test
public void testLoadAndSaveWithConflictingChanges() {
ConflictResolver conflictResolver = mock(ConflictResolver.class);
UUID identifier = UUID.randomUUID();
DomainEventMessage event2 =
new GenericDomainEventMessage<String>(
identifier, (long) 2, "Mock contents", MetaData.emptyInstance());
DomainEventMessage event3 =
new GenericDomainEventMessage<String>(
identifier, (long) 3, "Mock contents", MetaData.emptyInstance());
when(mockEventStore.readEvents("test", identifier))
.thenReturn(
new SimpleDomainEventStream(
new GenericDomainEventMessage<String>(
identifier, (long) 1, "Mock contents", MetaData.emptyInstance()),
event2,
event3));
testSubject.setConflictResolver(conflictResolver);
TestAggregate actual = testSubject.load(identifier, 1L);
verify(conflictResolver, never())
.resolveConflicts(anyListOf(DomainEventMessage.class), anyListOf(DomainEventMessage.class));
final StubDomainEvent appliedEvent = new StubDomainEvent();
actual.apply(appliedEvent);
CurrentUnitOfWork.commit();
verify(conflictResolver)
.resolveConflicts(payloadsEqual(appliedEvent), eq(Arrays.asList(event2, event3)));
}
public static void main(String[] args) {
// let's start with the Command Bus
CommandBus commandBus = new SimpleCommandBus();
// the CommandGateway provides a friendlier API to send commands
CommandGateway commandGateway = new DefaultCommandGateway(commandBus);
// we'll store Events on the FileSystem, in the "events" folder
EventStore eventStore =
new FileSystemEventStore(new SimpleEventFileResolver(new File("./events")));
// a Simple Event Bus will do
EventBus eventBus = new SimpleEventBus();
// we need to configure the repository
EventSourcingRepository<ToDoItem> repository =
new EventSourcingRepository<>(ToDoItem.class, eventStore);
repository.setEventBus(eventBus);
// Axon needs to know that our ToDoItem Aggregate can handle commands
new AggregateAnnotationCommandHandler<>(ToDoItem.class, repository).subscribe(commandBus);
// We register an event listener to see which events are created
eventBus.subscribe(
new SimpleEventProcessor(
"logging", new AnnotationEventListenerAdapter(new ToDoEventHandler())));
// and let's send some Commands on the CommandBus.
CommandGenerator.sendCommands(commandGateway);
}
@Test
public void testLoadEventsWithDecorators() {
UUID identifier = UUID.randomUUID();
SpyEventPreprocessor decorator1 = new SpyEventPreprocessor();
SpyEventPreprocessor decorator2 = new SpyEventPreprocessor();
testSubject.setEventStreamDecorators(Arrays.asList(decorator1, decorator2));
when(mockEventStore.readEvents("test", identifier))
.thenReturn(
new SimpleDomainEventStream(
new GenericDomainEventMessage<String>(
identifier, (long) 1, "Mock contents", MetaData.emptyInstance()),
new GenericDomainEventMessage<String>(
identifier, (long) 2, "Mock contents", MetaData.emptyInstance()),
new GenericDomainEventMessage<String>(
identifier, (long) 3, "Mock contents", MetaData.emptyInstance())));
TestAggregate aggregate = testSubject.load(identifier);
// loading them in...
InOrder inOrder = Mockito.inOrder(decorator1.lastSpy, decorator2.lastSpy);
inOrder.verify(decorator2.lastSpy).next();
inOrder.verify(decorator1.lastSpy).next();
inOrder.verify(decorator2.lastSpy).next();
inOrder.verify(decorator1.lastSpy).next();
inOrder.verify(decorator2.lastSpy).next();
inOrder.verify(decorator1.lastSpy).next();
aggregate.apply(new StubDomainEvent());
aggregate.apply(new StubDomainEvent());
}
@Bean
Repository<TimesheetAR> timesheetARRepository(
EventBus eventBus, SnapshotEventStore eventStore, SnapshotterTrigger snapshotterTrigger) {
EventSourcingRepository<TimesheetAR> repository =
new EventSourcingRepository<TimesheetAR>(timesheetAggregateFactory(), eventStore);
repository.setEventBus(eventBus);
repository.setSnapshotterTrigger(snapshotterTrigger);
return repository;
}
@Before
public void setUp() {
mockEventStore = mock(SnapshotEventStore.class);
mockEventBus = mock(EventBus.class);
testSubject = new EventSourcingRepository<TestAggregate>(new SubtAggregateFactory());
testSubject.setEventBus(mockEventBus);
testSubject.setEventStore(mockEventStore);
unitOfWork = DefaultUnitOfWork.startAndGet();
}
@Before
public void setUp() {
repository = new EventSourcingRepository<StubAggregate>(StubAggregate.class);
mockEventBus = mock(EventBus.class);
mockEventStore = new StubEventStore();
repository.setEventBus(mockEventBus);
repository.setEventStore(mockEventStore);
aggregateIdentifier = "testAggregateIdentifier";
}
@Bean
public EventSourcingRepository<SalesChannel> salesChannelRepository() {
FileSystemEventStore eventStore =
new FileSystemEventStore(new SimpleEventFileResolver(new File("data/eventstore")));
EventSourcingRepository<SalesChannel> repository =
new EventSourcingRepository<SalesChannel>(SalesChannel.class, eventStore);
repository.setEventBus(eventBus());
return repository;
}
@Test
public void testLoadAndSaveAggregate() {
UUID identifier = UUID.randomUUID();
DomainEventMessage event1 =
new GenericDomainEventMessage<String>(
identifier, (long) 1, "Mock contents", MetaData.emptyInstance());
DomainEventMessage event2 =
new GenericDomainEventMessage<String>(
identifier, (long) 2, "Mock contents", MetaData.emptyInstance());
when(mockEventStore.readEvents("test", identifier))
.thenReturn(new SimpleDomainEventStream(event1, event2));
TestAggregate aggregate = testSubject.load(identifier, null);
assertEquals(0, aggregate.getUncommittedEventCount());
assertEquals(2, aggregate.getHandledEvents().size());
assertSame(event1, aggregate.getHandledEvents().get(0));
assertSame(event2, aggregate.getHandledEvents().get(1));
// now the aggregate is loaded (and hopefully correctly locked)
StubDomainEvent event3 = new StubDomainEvent();
aggregate.apply(event3);
CurrentUnitOfWork.commit();
verify(mockEventBus).publish(isA(DomainEventMessage.class));
verify(mockEventBus, never()).publish(event1);
verify(mockEventBus, never()).publish(event2);
verify(mockEventStore, times(1)).appendEvents(eq("test"), isA(DomainEventStream.class));
assertEquals(0, aggregate.getUncommittedEventCount());
}
@Test
public void testLoadWithConflictingChanges_NoConflictResolverSet() {
UUID identifier = UUID.randomUUID();
DomainEventMessage event2 =
new GenericDomainEventMessage<String>(
identifier, (long) 2, "Mock contents", MetaData.emptyInstance());
DomainEventMessage event3 =
new GenericDomainEventMessage<String>(
identifier, (long) 3, "Mock contents", MetaData.emptyInstance());
when(mockEventStore.readEvents("test", identifier))
.thenReturn(
new SimpleDomainEventStream(
new GenericDomainEventMessage<String>(
identifier, (long) 1, "Mock contents", MetaData.emptyInstance()),
event2,
event3));
try {
testSubject.load(identifier, 1L);
fail("Expected ConflictingAggregateVersionException");
} catch (ConflictingAggregateVersionException e) {
assertEquals(identifier, e.getAggregateIdentifier());
assertEquals(1L, e.getExpectedVersion());
assertEquals(3L, e.getActualVersion());
}
}
@Test
public void testLoad_FirstEventIsSnapshot() {
UUID identifier = UUID.randomUUID();
TestAggregate aggregate = new TestAggregate(identifier);
when(mockEventStore.readEvents("test", identifier))
.thenReturn(
new SimpleDomainEventStream(
new GenericDomainEventMessage<AggregateSnapshot<TestAggregate>>(
identifier, 10, new AggregateSnapshot<TestAggregate>(aggregate))));
assertSame(aggregate, testSubject.load(identifier));
}
@Test
public void testCommandHandlerLoadsSameAggregateTwice() {
DefaultUnitOfWork.startAndGet();
StubAggregate stubAggregate = new StubAggregate(aggregateIdentifier);
stubAggregate.doSomething();
repository.add(stubAggregate);
CurrentUnitOfWork.commit();
DefaultUnitOfWork.startAndGet();
repository.load(aggregateIdentifier).doSomething();
repository.load(aggregateIdentifier).doSomething();
CurrentUnitOfWork.commit();
DomainEventStream es = mockEventStore.readEvents("", aggregateIdentifier);
assertTrue(es.hasNext());
assertEquals((Object) 0L, es.next().getSequenceNumber());
assertTrue(es.hasNext());
assertEquals((Object) 1L, es.next().getSequenceNumber());
assertTrue(es.hasNext());
assertEquals((Object) 2L, es.next().getSequenceNumber());
assertFalse(es.hasNext());
}
@Test
public void testSaveEventsWithDecorators() {
SpyEventPreprocessor decorator1 = new SpyEventPreprocessor();
SpyEventPreprocessor decorator2 = new SpyEventPreprocessor();
testSubject.setEventStreamDecorators(Arrays.asList(decorator1, decorator2));
testSubject.setEventStore(
new EventStore() {
@Override
public void appendEvents(String type, DomainEventStream events) {
while (events.hasNext()) {
events.next();
}
}
@Override
public DomainEventStream readEvents(String type, Object identifier) {
return mockEventStore.readEvents(type, identifier);
}
});
UUID identifier = UUID.randomUUID();
when(mockEventStore.readEvents("test", identifier))
.thenReturn(
new SimpleDomainEventStream(
new GenericDomainEventMessage<String>(
identifier, (long) 3, "Mock contents", MetaData.emptyInstance())));
TestAggregate aggregate = testSubject.load(identifier);
aggregate.apply(new StubDomainEvent());
aggregate.apply(new StubDomainEvent());
CurrentUnitOfWork.commit();
InOrder inOrder = Mockito.inOrder(decorator1.lastSpy, decorator2.lastSpy);
inOrder.verify(decorator1.lastSpy).next();
inOrder.verify(decorator2.lastSpy).next();
inOrder.verify(decorator1.lastSpy).next();
inOrder.verify(decorator2.lastSpy).next();
}
