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<?php |
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declare(strict_types=1); |
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namespace EventSauce\EventSourcing\TestUtilities; |
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use DateTimeImmutable; |
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use EventSauce\Clock\TestClock; |
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use EventSauce\EventSourcing\AggregateRoot; |
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use EventSauce\EventSourcing\AggregateRootId; |
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use EventSauce\EventSourcing\AggregateRootRepository; |
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use EventSauce\EventSourcing\DefaultHeadersDecorator; |
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use EventSauce\EventSourcing\EventSourcedAggregateRootRepository; |
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use EventSauce\EventSourcing\InMemoryMessageRepository; |
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use EventSauce\EventSourcing\MessageConsumer; |
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use EventSauce\EventSourcing\MessageDecorator; |
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use EventSauce\EventSourcing\MessageDecoratorChain; |
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use EventSauce\EventSourcing\MessageDispatcher; |
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use EventSauce\EventSourcing\MessageRepository; |
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use EventSauce\EventSourcing\SynchronousMessageDispatcher; |
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use Exception; |
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use LogicException; |
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use PHPUnit\Framework\TestCase; |
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use function get_class; |
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use function method_exists; |
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use function sprintf; |
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/** |
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* @method handle(...$arguments) |
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*/ |
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abstract class AggregateRootTestCase extends TestCase |
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{ |
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/** |
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* @var InMemoryMessageRepository |
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*/ |
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protected $messageRepository; |
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/** |
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* @phpstan-var AggregateRootRepository<AggregateRoot> |
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*/ |
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protected AggregateRootRepository $repository; |
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/** |
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* @var Exception|null |
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*/ |
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private $caughtException; |
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/** |
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* @var object[] |
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*/ |
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private $expectedEvents = []; |
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/** |
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* @var Exception|null |
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*/ |
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private $theExpectedException; |
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/** |
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* @var TestClock |
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*/ |
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private $clock; |
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/** |
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* @var bool |
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*/ |
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private $assertedScenario = false; |
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/** |
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* @var AggregateRootId |
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*/ |
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protected $aggregateRootId; |
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/** |
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* @before |
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*/ |
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protected function setUpEventSauce(): void |
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{ |
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$className = $this->aggregateRootClassName(); |
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$this->clock = new TestClock(); |
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$this->aggregateRootId = $this->newAggregateRootId(); |
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$this->messageRepository = new InMemoryMessageRepository(); |
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$dispatcher = $this->messageDispatcher(); |
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$decorator = $this->messageDecorator(); |
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$this->repository = $this->aggregateRootRepository( |
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$className, |
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$this->messageRepository, |
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$dispatcher, |
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$decorator |
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); |
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$this->expectedEvents = []; |
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$this->assertedScenario = false; |
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$this->theExpectedException = null; |
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$this->caughtException = null; |
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} |
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protected function retrieveAggregateRoot(AggregateRootId $id): object |
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{ |
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return $this->repository->retrieve($id); |
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} |
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protected function persistAggregateRoot(AggregateRoot $aggregateRoot): void |
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{ |
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$this->repository->persist($aggregateRoot); |
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} |
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/** |
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* @after |
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*/ |
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protected function assertScenario(): void |
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{ |
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// @codeCoverageIgnoreStart |
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if ($this->assertedScenario) { |
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return; |
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} |
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// @codeCoverageIgnoreEnd |
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try { |
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$this->assertExpectedException($this->theExpectedException, $this->caughtException); |
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$this->assertLastCommitEqualsEvents(...$this->expectedEvents); |
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$this->messageRepository->purgeLastCommit(); |
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} finally { |
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$this->assertedScenario = true; |
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$this->theExpectedException = null; |
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$this->caughtException = null; |
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} |
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} |
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protected function aggregateRootId(): AggregateRootId |
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{ |
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return $this->aggregateRootId; |
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} |
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abstract protected function newAggregateRootId(): AggregateRootId; |
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/** |
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* @phpstan-return class-string<AggregateRoot> |
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*/ |
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abstract protected function aggregateRootClassName(): string; |
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/** |
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* @return $this |
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*/ |
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protected function given(object ...$events) |
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{ |
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$this->repository->persistEvents($this->aggregateRootId(), count($events), ...$events); |
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$this->messageRepository->purgeLastCommit(); |
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return $this; |
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} |
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public function on(AggregateRootId $id): EventStager |
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{ |
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return new EventStager($id, $this->messageRepository, $this->repository, $this); |
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} |
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/** |
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* @param mixed[] $arguments |
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* |
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* @return $this |
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*/ |
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protected function when(...$arguments) |
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{ |
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try { |
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if ( ! method_exists($this, 'handle')) { |
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throw new LogicException(sprintf('Class %s is missing a ::handle method.', get_class($this))); |
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} |
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$this->handle(...$arguments); |
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} catch (Exception $exception) { |
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$this->caughtException = $exception; |
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} |
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return $this; |
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} |
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/** |
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* @return $this |
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*/ |
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protected function then(object ...$events) |
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{ |
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$this->expectedEvents = $events; |
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return $this; |
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} |
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/** |
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* @return $this |
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*/ |
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public function expectToFail(Exception $expectedException) |
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{ |
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$this->theExpectedException = $expectedException; |
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return $this; |
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} |
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/** |
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* @return $this |
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*/ |
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protected function thenNothingShouldHaveHappened() |
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{ |
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$this->expectedEvents = []; |
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return $this; |
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} |
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protected function assertLastCommitEqualsEvents(object ...$events): void |
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{ |
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self::assertEquals($events, $this->messageRepository->lastCommit(), 'Events are not equal.'); |
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} |
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private function assertExpectedException( |
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Exception $expectedException = null, |
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Exception $caughtException = null |
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): void { |
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if (null !== $caughtException && (null === $expectedException || get_class($expectedException) !== get_class( |
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$caughtException |
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))) { |
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throw $caughtException; |
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} |
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self::assertEquals([$expectedException], [$caughtException], '>> Exceptions are not equal.'); |
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} |
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protected function currentTime(): DateTimeImmutable |
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{ |
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return $this->clock->now(); |
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} |
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protected function clock(): TestClock |
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{ |
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return $this->clock; |
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} |
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protected function messageDispatcher(): MessageDispatcher |
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{ |
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return new SynchronousMessageDispatcher( |
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new MessageConsumerThatSerializesMessages(), ...$this->consumers() |
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); |
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} |
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/** |
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* @return MessageConsumer[] |
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*/ |
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protected function consumers(): array |
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{ |
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return []; |
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} |
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private function messageDecorator(): MessageDecorator |
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{ |
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return new MessageDecoratorChain(new DefaultHeadersDecorator()); |
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} |
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/** |
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* @template T of AggregateRoot |
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* |
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* @phpstan-param class-string<T> $className |
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* |
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* @phpstan-return AggregateRootRepository<T> |
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*/ |
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protected function aggregateRootRepository( |
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string $className, |
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MessageRepository $repository, |
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MessageDispatcher $dispatcher, |
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MessageDecorator $decorator |
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): AggregateRootRepository { |
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return new EventSourcedAggregateRootRepository( |
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$className, $repository, $dispatcher, $decorator |
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); |
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} |
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} |
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