62 lines
2.3 KiB
PHP
62 lines
2.3 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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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namespace Symfony\Component\Messenger;
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use Symfony\Component\Messenger\Exception\LogicException;
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use Symfony\Component\Messenger\Stamp\HandledStamp;
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/**
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* Leverages a message bus to expect a single, synchronous message handling and return its result.
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*
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* @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
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*/
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trait HandleTrait
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{
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/** @var MessageBusInterface */
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private $messageBus;
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/**
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* Dispatches the given message, expecting to be handled by a single handler
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* and returns the result from the handler returned value.
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* This behavior is useful for both synchronous command & query buses,
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* the last one usually returning the handler result.
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*
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* @param object|Envelope $message The message or the message pre-wrapped in an envelope
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*
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* @return mixed
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*/
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private function handle(object $message)
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{
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if (!$this->messageBus instanceof MessageBusInterface) {
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throw new LogicException(sprintf('You must provide a "%s" instance in the "%s::$messageBus" property, "%s" given.', MessageBusInterface::class, static::class, get_debug_type($this->messageBus)));
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}
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$envelope = $this->messageBus->dispatch($message);
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/** @var HandledStamp[] $handledStamps */
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$handledStamps = $envelope->all(HandledStamp::class);
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if (!$handledStamps) {
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throw new LogicException(sprintf('Message of type "%s" was handled zero times. Exactly one handler is expected when using "%s::%s()".', get_debug_type($envelope->getMessage()), static::class, __FUNCTION__));
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}
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if (\count($handledStamps) > 1) {
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$handlers = implode(', ', array_map(function (HandledStamp $stamp): string {
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return sprintf('"%s"', $stamp->getHandlerName());
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}, $handledStamps));
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throw new LogicException(sprintf('Message of type "%s" was handled multiple times. Only one handler is expected when using "%s::%s()", got %d: %s.', get_debug_type($envelope->getMessage()), static::class, __FUNCTION__, \count($handledStamps), $handlers));
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}
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return $handledStamps[0]->getResult();
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}
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}
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