public function testOpenExistingStream()
{
$contract = Contract::fromClass(\stdClass::class);
$identifier = EventStreamIdentifier::fromString('Foo');
$this->persistence->expects($this->once())->method('fetch')->with($contract, $identifier)->willReturn([]);
$stream = $this->eventStore->openStream($contract, $identifier);
$this->assertInstanceOf(EventStream::class, $stream);
$this->assertEquals([], $stream->all());
}
private function persistAggregate(Aggregate $aggregate)
{
if (empty($aggregate->getChanges())) {
return;
}
$events = new EventCollection($aggregate->getChanges());
$stream = $this->eventStore->openStream($aggregate->getContract(), EventStreamIdentifier::fromString($aggregate->getIdentifier()));
foreach ($events as $event) {
$stream->append($event);
}
$stream->commit();
$this->eventEmitter->emit($events);
$aggregate->clearChanges();
}
$dispatcher->addSubscriber($accountHistory);
$dispatcher->addSubscriber($accountBalance);
$dispatcher->addSubscriber($transferManager);
/*
* Normal event propagation
*
* When commands trigger actions on Account, domain events will be emitted
* As reaction to those events, projectors will create data for data models
*/
$bus->handle(new OpenAccountCommand('Foo', 'EUR'));
$bus->handle(new DepositCommand('Foo', 20));
$bus->handle(new OpenAccountCommand('Bar', 'EUR'));
$bus->handle(new TransferCommand('Foo', 'Bar', 10));
$bus->handle(new WithdrawCommand('Foo', 10));
$bus->handle(new WithdrawCommand('Bar', 10));
var_dump($accountBalance, $accountHistory, $transferManager, $persistence);
/*
* Introducing new projector
*
* New projector needs to catch up
* Separate emitter is created - just for new projector - it will emit all historical events
*/
$dispatcher = new EventDispatcher();
$eventEmitter = new DispatcherEmitter($dispatcher);
$export = new AccountExportProjector();
$dispatcher->addSubscriber($export);
$stream = $eventStore->openStream(Contract::fromClass(Account::class), EventStreamIdentifier::fromString('Foo'));
$eventEmitter->emit(new EventCollection($stream->all()));
$stream = $eventStore->openStream(Contract::fromClass(Account::class), EventStreamIdentifier::fromString('Bar'));
$eventEmitter->emit(new EventCollection($stream->all()));
var_dump($export);
