79 lines
2.6 KiB
PHP
79 lines
2.6 KiB
PHP
<?php
|
|
|
|
/*
|
|
* This file is part of the Symfony package.
|
|
*
|
|
* (c) Fabien Potencier <fabien@symfony.com>
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
namespace Symfony\Component\Messenger;
|
|
|
|
use Symfony\Component\Messenger\Middleware\MiddlewareInterface;
|
|
use Symfony\Component\Messenger\Middleware\StackMiddleware;
|
|
|
|
/**
|
|
* @author Samuel Roze <samuel.roze@gmail.com>
|
|
* @author Matthias Noback <matthiasnoback@gmail.com>
|
|
* @author Nicolas Grekas <p@tchwork.com>
|
|
*/
|
|
class MessageBus implements MessageBusInterface
|
|
{
|
|
private $middlewareAggregate;
|
|
|
|
/**
|
|
* @param iterable<mixed, MiddlewareInterface> $middlewareHandlers
|
|
*/
|
|
public function __construct(iterable $middlewareHandlers = [])
|
|
{
|
|
if ($middlewareHandlers instanceof \IteratorAggregate) {
|
|
$this->middlewareAggregate = $middlewareHandlers;
|
|
} elseif (\is_array($middlewareHandlers)) {
|
|
$this->middlewareAggregate = new \ArrayObject($middlewareHandlers);
|
|
} else {
|
|
// $this->middlewareAggregate should be an instance of IteratorAggregate.
|
|
// When $middlewareHandlers is an Iterator, we wrap it to ensure it is lazy-loaded and can be rewound.
|
|
$this->middlewareAggregate = new class($middlewareHandlers) implements \IteratorAggregate {
|
|
private $middlewareHandlers;
|
|
private $cachedIterator;
|
|
|
|
public function __construct(\Traversable $middlewareHandlers)
|
|
{
|
|
$this->middlewareHandlers = $middlewareHandlers;
|
|
}
|
|
|
|
public function getIterator(): \Traversable
|
|
{
|
|
if (null === $this->cachedIterator) {
|
|
$this->cachedIterator = new \ArrayObject(iterator_to_array($this->middlewareHandlers, false));
|
|
}
|
|
|
|
return $this->cachedIterator;
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function dispatch(object $message, array $stamps = []): Envelope
|
|
{
|
|
$envelope = Envelope::wrap($message, $stamps);
|
|
$middlewareIterator = $this->middlewareAggregate->getIterator();
|
|
|
|
while ($middlewareIterator instanceof \IteratorAggregate) {
|
|
$middlewareIterator = $middlewareIterator->getIterator();
|
|
}
|
|
$middlewareIterator->rewind();
|
|
|
|
if (!$middlewareIterator->valid()) {
|
|
return $envelope;
|
|
}
|
|
$stack = new StackMiddleware($middlewareIterator);
|
|
|
|
return $middlewareIterator->current()->handle($envelope, $stack);
|
|
}
|
|
}
|