131 lines
4.4 KiB
PHP
131 lines
4.4 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\Middleware;
|
||
|
|
||
|
use Symfony\Component\Messenger\Envelope;
|
||
|
use Symfony\Component\Messenger\Exception\DelayedMessageHandlingException;
|
||
|
use Symfony\Component\Messenger\Stamp\DispatchAfterCurrentBusStamp;
|
||
|
|
||
|
/**
|
||
|
* Allow to configure messages to be handled after the current bus is finished.
|
||
|
*
|
||
|
* I.e, messages dispatched from a handler with a DispatchAfterCurrentBus stamp
|
||
|
* will actually be handled once the current message being dispatched is fully
|
||
|
* handled.
|
||
|
*
|
||
|
* For instance, using this middleware before the DoctrineTransactionMiddleware
|
||
|
* means sub-dispatched messages with a DispatchAfterCurrentBus stamp would be
|
||
|
* handled after the Doctrine transaction has been committed.
|
||
|
*
|
||
|
* @author Tobias Nyholm <tobias.nyholm@gmail.com>
|
||
|
*/
|
||
|
class DispatchAfterCurrentBusMiddleware implements MiddlewareInterface
|
||
|
{
|
||
|
/**
|
||
|
* @var QueuedEnvelope[] A queue of messages and next middleware
|
||
|
*/
|
||
|
private array $queue = [];
|
||
|
|
||
|
/**
|
||
|
* @var bool this property is used to signal if we are inside a the first/root call to
|
||
|
* MessageBusInterface::dispatch() or if dispatch has been called inside a message handler
|
||
|
*/
|
||
|
private bool $isRootDispatchCallRunning = false;
|
||
|
|
||
|
public function handle(Envelope $envelope, StackInterface $stack): Envelope
|
||
|
{
|
||
|
if (null !== $envelope->last(DispatchAfterCurrentBusStamp::class)) {
|
||
|
if ($this->isRootDispatchCallRunning) {
|
||
|
$this->queue[] = new QueuedEnvelope($envelope, $stack);
|
||
|
|
||
|
return $envelope;
|
||
|
}
|
||
|
|
||
|
$envelope = $envelope->withoutAll(DispatchAfterCurrentBusStamp::class);
|
||
|
}
|
||
|
|
||
|
if ($this->isRootDispatchCallRunning) {
|
||
|
/*
|
||
|
* A call to MessageBusInterface::dispatch() was made from inside the main bus handling,
|
||
|
* but the message does not have the stamp. So, process it like normal.
|
||
|
*/
|
||
|
return $stack->next()->handle($envelope, $stack);
|
||
|
}
|
||
|
|
||
|
// First time we get here, mark as inside a "root dispatch" call:
|
||
|
$this->isRootDispatchCallRunning = true;
|
||
|
try {
|
||
|
// Execute the whole middleware stack & message handling for main dispatch:
|
||
|
$returnedEnvelope = $stack->next()->handle($envelope, $stack);
|
||
|
} catch (\Throwable $exception) {
|
||
|
/*
|
||
|
* Whenever an exception occurs while handling a message that has
|
||
|
* queued other messages, we drop the queued ones.
|
||
|
* This is intentional since the queued commands were likely dependent
|
||
|
* on the preceding command.
|
||
|
*/
|
||
|
$this->queue = [];
|
||
|
$this->isRootDispatchCallRunning = false;
|
||
|
|
||
|
throw $exception;
|
||
|
}
|
||
|
|
||
|
// "Root dispatch" call is finished, dispatch stored messages.
|
||
|
$exceptions = [];
|
||
|
while (null !== $queueItem = array_shift($this->queue)) {
|
||
|
// Save how many messages are left in queue before handling the message
|
||
|
$queueLengthBefore = \count($this->queue);
|
||
|
try {
|
||
|
// Execute the stored messages
|
||
|
$queueItem->getStack()->next()->handle($queueItem->getEnvelope(), $queueItem->getStack());
|
||
|
} catch (\Exception $exception) {
|
||
|
// Gather all exceptions
|
||
|
$exceptions[] = $exception;
|
||
|
// Restore queue to previous state
|
||
|
$this->queue = \array_slice($this->queue, 0, $queueLengthBefore);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
$this->isRootDispatchCallRunning = false;
|
||
|
if (\count($exceptions) > 0) {
|
||
|
throw new DelayedMessageHandlingException($exceptions, $returnedEnvelope);
|
||
|
}
|
||
|
|
||
|
return $returnedEnvelope;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @internal
|
||
|
*/
|
||
|
final class QueuedEnvelope
|
||
|
{
|
||
|
private Envelope $envelope;
|
||
|
private StackInterface $stack;
|
||
|
|
||
|
public function __construct(Envelope $envelope, StackInterface $stack)
|
||
|
{
|
||
|
$this->envelope = $envelope->withoutAll(DispatchAfterCurrentBusStamp::class);
|
||
|
$this->stack = $stack;
|
||
|
}
|
||
|
|
||
|
public function getEnvelope(): Envelope
|
||
|
{
|
||
|
return $this->envelope;
|
||
|
}
|
||
|
|
||
|
public function getStack(): StackInterface
|
||
|
{
|
||
|
return $this->stack;
|
||
|
}
|
||
|
}
|