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feature #36152 [Messenger] dispatch event when a message is retried (nikophil)
This PR was squashed before being merged into the 5.2-dev branch. Discussion ---------- [Messenger] dispatch event when a message is retried | Q | A | ------------- | --- | Branch? | master | Bug fix? | no | New feature? | yes | Deprecations? | no | License | MIT Hello, i'm working on a bundle which helps to monitor messenger queues (add some stats for queues/transports + ability to manage failed messages from the browser) https://github.com/SymfonyCasts/messenger-monitor-bundle/ and we're missing some hooks in the messaging system: 1. a way to know when a message has been retried (fixed by dispatching a new `WorkerMessageRetriedEvent` in `SendFailedMessageForRetryListener::onMessageFailed()`) 2. a way to update the enveloppe in worker message events (fixed by adding `AbstractWorkerMessageEvent::setEnvelope()`) if needed i can provide some precise use cases. thanks. Commits ------- 55bddcb [Messenger] dispatch event when a message is retried
2 parents 1b88b8b + 55bddcb commit 14942db

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8 files changed

+90
-4
lines changed

8 files changed

+90
-4
lines changed

‎src/Symfony/Bundle/FrameworkBundle/Resources/config/messenger.php

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@@ -152,6 +152,7 @@
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abstract_arg('senders service locator'),
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service('messenger.retry_strategy_locator'),
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service('logger')->ignoreOnInvalid(),
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service('event_dispatcher'),
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])
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->tag('kernel.event_subscriber')
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->tag('monolog.logger', ['channel' => 'messenger'])

‎src/Symfony/Component/Messenger/CHANGELOG.md

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@@ -7,6 +7,8 @@ CHANGELOG
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* Added `FlattenExceptionNormalizer` to give more information about the exception on Messenger background processes. The `FlattenExceptionNormalizer` has a higher priority than `ProblemNormalizer` and it is only used when the Messenger serialization context is set.
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* Added factory methods to `DelayStamp`.
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* Removed the exception when dispatching a message with a `DispatchAfterCurrentBusStamp` and not in a context of another dispatch call
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* Added `WorkerMessageRetriedEvent`
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* Added `WorkerMessageReceivedEvent::setEnvelope()` and made event mutable
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5.1.0
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-----

‎src/Symfony/Component/Messenger/Event/AbstractWorkerMessageEvent.php

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@@ -12,6 +12,7 @@
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namespace Symfony\Component\Messenger\Event;
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use Symfony\Component\Messenger\Envelope;
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use Symfony\Component\Messenger\Stamp\StampInterface;
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abstract class AbstractWorkerMessageEvent
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{
@@ -36,4 +37,9 @@ public function getReceiverName(): string
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{
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return $this->receiverName;
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}
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public function addStamps(StampInterface ...$stamps): void
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{
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$this->envelope = $this->envelope->with(...$stamps);
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}
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}

‎src/Symfony/Component/Messenger/Event/WorkerMessageRetriedEvent.php

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@@ -0,0 +1,21 @@
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<?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 <[email protected]>
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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\Event;
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/**
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* Dispatched after a message has been sent for retry.
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*
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* The event name is the class name.
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*/
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final class WorkerMessageRetriedEvent extends AbstractWorkerMessageEvent
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{
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}

‎src/Symfony/Component/Messenger/EventListener/SendFailedMessageForRetryListener.php

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@@ -15,6 +15,7 @@
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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use Symfony\Component\Messenger\Envelope;
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use Symfony\Component\Messenger\Event\WorkerMessageFailedEvent;
18+
use Symfony\Component\Messenger\Event\WorkerMessageRetriedEvent;
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use Symfony\Component\Messenger\Exception\HandlerFailedException;
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use Symfony\Component\Messenger\Exception\RecoverableExceptionInterface;
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use Symfony\Component\Messenger\Exception\RuntimeException;
@@ -24,6 +25,7 @@
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use Symfony\Component\Messenger\Stamp\RedeliveryStamp;
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use Symfony\Component\Messenger\Stamp\StampInterface;
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use Symfony\Component\Messenger\Transport\Sender\SenderInterface;
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use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
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/**
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* @author Tobias Schultze <http://tobion.de>
@@ -33,13 +35,15 @@ class SendFailedMessageForRetryListener implements EventSubscriberInterface
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private $sendersLocator;
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private $retryStrategyLocator;
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private $logger;
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private $eventDispatcher;
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private $historySize;
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public function __construct(ContainerInterface $sendersLocator, ContainerInterface $retryStrategyLocator, LoggerInterface $logger = null, int $historySize = 10)
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public function __construct(ContainerInterface $sendersLocator, ContainerInterface $retryStrategyLocator, LoggerInterface $logger = null, EventDispatcherInterface $eventDispatcher = null, int $historySize = 10)
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{
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$this->sendersLocator = $sendersLocator;
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$this->retryStrategyLocator = $retryStrategyLocator;
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$this->logger = $logger;
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$this->eventDispatcher = $eventDispatcher;
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$this->historySize = $historySize;
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}
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@@ -74,6 +78,10 @@ public function onMessageFailed(WorkerMessageFailedEvent $event)
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// re-send the message for retry
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$this->getSenderForTransport($event->getReceiverName())->send($retryEnvelope);
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if (null !== $this->eventDispatcher) {
83+
$this->eventDispatcher->dispatch(new WorkerMessageRetriedEvent($retryEnvelope, $event->getReceiverName()));
84+
}
7785
} else {
7886
if (null !== $this->logger) {
7987
$this->logger->critical('Error thrown while handling message {class}. Removing from transport after {retryCount} retries. Error: "{error}"', $context + ['retryCount' => $retryCount, 'error' => $throwable->getMessage(), 'exception' => $throwable]);

‎src/Symfony/Component/Messenger/Tests/EventListener/SendFailedMessageForRetryListenerTest.php

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@@ -21,6 +21,7 @@
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use Symfony\Component\Messenger\Stamp\DelayStamp;
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use Symfony\Component\Messenger\Stamp\RedeliveryStamp;
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use Symfony\Component\Messenger\Transport\Sender\SenderInterface;
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use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
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class SendFailedMessageForRetryListenerTest extends TestCase
2627
{
@@ -107,7 +108,10 @@ public function testEnvelopeIsSentToTransportOnRetry()
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$retryStrategyLocator->expects($this->once())->method('has')->willReturn(true);
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$retryStrategyLocator->expects($this->once())->method('get')->willReturn($retryStategy);
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110-
$listener = new SendFailedMessageForRetryListener($senderLocator, $retryStrategyLocator);
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$eventDispatcher = $this->createMock(EventDispatcherInterface::class);
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$eventDispatcher->expects($this->once())->method('dispatch');
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$listener = new SendFailedMessageForRetryListener($senderLocator, $retryStrategyLocator, null, $eventDispatcher);
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$event = new WorkerMessageFailedEvent($envelope, 'my_receiver', $exception);
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‎src/Symfony/Component/Messenger/Tests/WorkerTest.php

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@@ -25,6 +25,7 @@
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use Symfony\Component\Messenger\Stamp\ConsumedByWorkerStamp;
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use Symfony\Component\Messenger\Stamp\ReceivedStamp;
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use Symfony\Component\Messenger\Stamp\SentStamp;
28+
use Symfony\Component\Messenger\Stamp\StampInterface;
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use Symfony\Component\Messenger\Tests\Fixtures\DummyMessage;
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use Symfony\Component\Messenger\Transport\Receiver\ReceiverInterface;
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use Symfony\Component\Messenger\Worker;
@@ -243,14 +244,45 @@ public function testWorkerWithMultipleReceivers()
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// make sure they were processed in the correct order
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$this->assertSame([$envelope1, $envelope2, $envelope3, $envelope4, $envelope5, $envelope6], $processedEnvelopes);
245246
}
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248+
public function testWorkerMessageReceivedEventMutability()
249+
{
250+
$envelope = new Envelope(new DummyMessage('Hello'));
251+
$receiver = new DummyReceiver([[$envelope]]);
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253+
$bus = $this->getMockBuilder(MessageBusInterface::class)->getMock();
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$bus->method('dispatch')->willReturnArgument(0);
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256+
$eventDispatcher = new EventDispatcher();
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$eventDispatcher->addSubscriber(new StopWorkerOnMessageLimitListener(1));
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259+
$stamp = new class() implements StampInterface {
260+
};
261+
$listener = function (WorkerMessageReceivedEvent $event) use ($stamp) {
262+
$event->addStamps($stamp);
263+
};
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$eventDispatcher->addListener(WorkerMessageReceivedEvent::class, $listener);
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$worker = new Worker([$receiver], $bus, $eventDispatcher);
268+
$worker->run();
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$envelope = current($receiver->getAcknowledgedEnvelopes());
271+
$this->assertCount(1, $envelope->all(\get_class($stamp)));
272+
}
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}
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248275
class DummyReceiver implements ReceiverInterface
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{
250277
private $deliveriesOfEnvelopes;
278+
private $acknowledgedEnvelopes;
279+
private $rejectedEnvelopes;
251280
private $acknowledgeCount = 0;
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private $rejectCount = 0;
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/**
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* @param Envelope[][] $deliveriesOfEnvelopes
285+
*/
254286
public function __construct(array $deliveriesOfEnvelopes)
255287
{
256288
$this->deliveriesOfEnvelopes = $deliveriesOfEnvelopes;
@@ -266,11 +298,13 @@ public function get(): iterable
266298
public function ack(Envelope $envelope): void
267299
{
268300
++$this->acknowledgeCount;
301+
$this->acknowledgedEnvelopes[] = $envelope;
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}
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271304
public function reject(Envelope $envelope): void
272305
{
273306
++$this->rejectCount;
307+
$this->rejectedEnvelopes[] = $envelope;
274308
}
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276310
public function getAcknowledgeCount(): int
@@ -282,4 +316,9 @@ public function getRejectCount(): int
282316
{
283317
return $this->rejectCount;
284318
}
319+
320+
public function getAcknowledgedEnvelopes(): array
321+
{
322+
return $this->acknowledgedEnvelopes;
323+
}
285324
}

‎src/Symfony/Component/Messenger/Worker.php

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@@ -104,6 +104,7 @@ private function handleMessage(Envelope $envelope, ReceiverInterface $receiver,
104104
{
105105
$event = new WorkerMessageReceivedEvent($envelope, $transportName);
106106
$this->dispatchEvent($event);
107+
$envelope = $event->getEnvelope();
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108109
if (!$event->shouldHandle()) {
109110
return;
@@ -123,7 +124,9 @@ private function handleMessage(Envelope $envelope, ReceiverInterface $receiver,
123124
$envelope = $throwable->getEnvelope();
124125
}
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126-
$this->dispatchEvent(new WorkerMessageFailedEvent($envelope, $transportName, $throwable));
127+
$failedEvent = new WorkerMessageFailedEvent($envelope, $transportName, $throwable);
128+
$this->dispatchEvent($failedEvent);
129+
$envelope = $failedEvent->getEnvelope();
127130

128131
if (!$rejectFirst) {
129132
$receiver->reject($envelope);
@@ -132,7 +135,9 @@ private function handleMessage(Envelope $envelope, ReceiverInterface $receiver,
132135
return;
133136
}
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135-
$this->dispatchEvent(new WorkerMessageHandledEvent($envelope, $transportName));
138+
$handledEvent = new WorkerMessageHandledEvent($envelope, $transportName);
139+
$this->dispatchEvent($handledEvent);
140+
$envelope = $handledEvent->getEnvelope();
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137142
if (null !== $this->logger) {
138143
$message = $envelope->getMessage();

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