78 lines
2.4 KiB
PHP
78 lines
2.4 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\InvalidArgumentException;
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use Symfony\Component\Messenger\Middleware\MiddlewareInterface;
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/**
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* @author Samuel Roze <samuel.roze@gmail.com>
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* @author Matthias Noback <matthiasnoback@gmail.com>
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*/
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class MessageBus implements MessageBusInterface
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{
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private $middlewareHandlers;
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/**
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* @var MiddlewareInterface[]|null
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*/
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private $indexedMiddlewareHandlers;
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/**
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* @param MiddlewareInterface[]|iterable $middlewareHandlers
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*/
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public function __construct(iterable $middlewareHandlers = array())
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{
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$this->middlewareHandlers = $middlewareHandlers;
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}
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/**
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* {@inheritdoc}
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*/
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public function dispatch($message)
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{
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if (!\is_object($message)) {
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throw new InvalidArgumentException(sprintf('Invalid type for message argument. Expected object, but got "%s".', \gettype($message)));
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}
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return \call_user_func($this->callableForNextMiddleware(0, Envelope::wrap($message)), $message);
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}
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private function callableForNextMiddleware(int $index, Envelope $currentEnvelope): callable
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{
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if (null === $this->indexedMiddlewareHandlers) {
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$this->indexedMiddlewareHandlers = \is_array($this->middlewareHandlers) ? array_values($this->middlewareHandlers) : iterator_to_array($this->middlewareHandlers, false);
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}
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if (!isset($this->indexedMiddlewareHandlers[$index])) {
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return function () {};
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}
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$middleware = $this->indexedMiddlewareHandlers[$index];
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return function ($message) use ($middleware, $index, $currentEnvelope) {
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if ($message instanceof Envelope) {
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$currentEnvelope = $message;
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} else {
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$message = $currentEnvelope->withMessage($message);
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}
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if (!$middleware instanceof EnvelopeAwareInterface) {
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// Do not provide the envelope if the middleware cannot read it:
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$message = $message->getMessage();
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}
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return $middleware->handle($message, $this->callableForNextMiddleware($index + 1, $currentEnvelope));
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};
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}
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}
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