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<?php |
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/** |
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* Copyright (c) 2017 Constantin Galbenu <[email protected]> |
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*/ |
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namespace Gica\Cqrs\Command\CommandTester; |
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use Gica\Cqrs\Aggregate\AggregateRepository; |
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use Gica\Cqrs\Command; |
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use Gica\Cqrs\Command\CommandApplier; |
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use Gica\Cqrs\Command\CommandSubscriber; |
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use Gica\Cqrs\Command\CommandWithMetadata; |
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use Gica\Cqrs\Command\MetadataWrapper as CommandMetadataFactory; |
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use Gica\Cqrs\Command\ValueObject\CommandHandlerAndAggregate; |
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use Gica\Cqrs\Event\EventsApplier\EventsApplierOnAggregate; |
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use Gica\Cqrs\Event\EventWithMetaData; |
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use Gica\Cqrs\Event\MetaData; |
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use Gica\Cqrs\Event\MetadataFactory as EventMetadataFactory; |
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use Gica\Cqrs\Event\ScheduledEvent; |
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use Gica\Cqrs\Scheduling\ScheduledCommand; |
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use Gica\Types\Guid; |
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class DefaultCommandTesterWithExplanation implements Command\CommandTesterWithExplanation |
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{ |
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/** |
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* @var CommandSubscriber |
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*/ |
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private $commandSubscriber; |
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/** |
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* @var CommandApplier |
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*/ |
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private $commandApplier; |
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/** |
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* @var AggregateRepository |
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*/ |
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private $aggregateRepository; |
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/** |
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* @var EventsApplierOnAggregate |
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*/ |
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private $eventsApplierOnAggregate; |
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/** |
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* @var EventMetadataFactory |
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*/ |
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private $eventMetadataFactory; |
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/** |
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* @var CommandMetadataFactory |
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*/ |
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private $commandMetadataFactory; |
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public function __construct( |
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CommandSubscriber $commandSubscriber, |
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CommandApplier $commandApplier, |
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AggregateRepository $aggregateRepository, |
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EventsApplierOnAggregate $eventsApplier, |
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EventMetadataFactory $eventMetadataFactory, |
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CommandMetadataFactory $commandMetadataFactory |
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) |
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{ |
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$this->commandSubscriber = $commandSubscriber; |
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$this->commandApplier = $commandApplier; |
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$this->aggregateRepository = $aggregateRepository; |
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$this->eventsApplierOnAggregate = $eventsApplier; |
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$this->eventMetadataFactory = $eventMetadataFactory; |
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$this->commandMetadataFactory = $commandMetadataFactory; |
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} |
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public function whyCantExecuteCommand(Command $command) |
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{ |
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try { |
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$command = $this->commandMetadataFactory->wrapCommandWithMetadata($command, null); |
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$this->applyCommand($command, $this->loadCommandHandlerAndAggregate($command)); |
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return []; |
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} catch (\Exception $exception) { |
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return [$exception]; |
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} |
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} |
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private function loadCommandHandlerAndAggregate(CommandWithMetadata $command): CommandHandlerAndAggregate |
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{ |
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return new CommandHandlerAndAggregate( |
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$this->commandSubscriber->getHandlerForCommand($command->getCommand()), |
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$this->aggregateRepository->loadAggregate($this->commandSubscriber->getHandlerForCommand($command->getCommand())->getHandlerClass(), $command->getAggregateId()) |
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); |
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} |
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private function decorateEventWithMetaData($event, MetaData $metaData): EventWithMetaData |
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{ |
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return new EventWithMetaData($event, $metaData->withEventId(Guid::generate())); |
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} |
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/** |
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* @param CommandWithMetadata $command |
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* @param CommandHandlerAndAggregate $handlerAndAggregate |
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* @return void |
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*/ |
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private function applyCommand(CommandWithMetadata $command, CommandHandlerAndAggregate $handlerAndAggregate) |
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{ |
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$aggregate = $handlerAndAggregate->getAggregate(); |
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$handler = $handlerAndAggregate->getCommandHandler(); |
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$metaData = $this->eventMetadataFactory->factoryEventMetadata($command, $aggregate); |
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$newMessageGenerator = $this->commandApplier->applyCommand($aggregate, $command->getCommand(), $handler->getMethodName()); |
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foreach ($newMessageGenerator as $message) { |
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if (!$this->isScheduledCommand($message)) { |
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$eventWithMetaData = $this->decorateEventWithMetaData($message, $metaData); |
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if (!$this->isScheduledEvent($message)) { |
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$this->eventsApplierOnAggregate->applyEventsOnAggregate($aggregate, [$eventWithMetaData]); |
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} |
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} |
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} |
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} |
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private function isScheduledEvent($event): bool |
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{ |
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return $event instanceof ScheduledEvent; |
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} |
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private function isScheduledCommand($message): bool |
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{ |
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return $message instanceof ScheduledCommand; |
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} |
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} |
xprt64 /
cqrs-es
