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<?php |
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/** |
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* This file is part of the daikon-cqrs/cqrs project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Daikon\EventSourcing\Aggregate\Command; |
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use Daikon\EventSourcing\Aggregate\AggregateIdInterface; |
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use Daikon\EventSourcing\Aggregate\AggregateRevision; |
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use Daikon\EventSourcing\Aggregate\AggregateRootInterface; |
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use Daikon\EventSourcing\EventStore\UnitOfWorkInterface; |
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use Daikon\MessageBus\Channel\Subscription\MessageHandler\MessageHandlerInterface; |
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use Daikon\MessageBus\EnvelopeInterface; |
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use Daikon\MessageBus\MessageBusInterface; |
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use Daikon\MessageBus\Metadata\Metadata; |
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abstract class CommandHandler implements MessageHandlerInterface |
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{ |
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/** @var MessageBusInterface */ |
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private $messageBus; |
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/** @var UnitOfWorkInterface */ |
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private $unitOfWork; |
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public function __construct(UnitOfWorkInterface $unitOfWork, MessageBusInterface $messageBus) |
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{ |
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$this->messageBus = $messageBus; |
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$this->unitOfWork = $unitOfWork; |
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} |
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public function handle(EnvelopeInterface $envelope): bool |
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{ |
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$commandMessage = $envelope->getMessage(); |
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$handlerName = (new \ReflectionClass($commandMessage))->getShortName(); |
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$handlerMethod = 'handle'.ucfirst($handlerName); |
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/** @var callable $handler */ |
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$handler = [ $this, $handlerMethod ]; |
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if (!is_callable($handler)) { |
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throw new \Exception(sprintf('Handler "%s" is not callable on '.static::class, $handlerMethod)); |
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} |
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return $this->commit(...call_user_func($handler, $commandMessage, $envelope->getMetadata())); |
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} |
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protected function commit(AggregateRootInterface $aggregateRoot, Metadata $metadata): bool |
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{ |
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$committed = false; |
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foreach ($this->unitOfWork->commit($aggregateRoot, $metadata) as $newCommit) { |
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if ($this->messageBus->publish($newCommit, 'commits') && !$committed) { |
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$committed = true; |
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} |
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} |
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return $committed; |
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} |
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protected function checkout( |
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AggregateIdInterface $aggregateId, |
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AggregateRevision $revision |
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): AggregateRootInterface { |
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return $this->unitOfWork->checkout($aggregateId, $revision); |
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} |
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} |
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daikon-cqrs /
event-sourcing
This check looks for function calls that miss required arguments.