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<?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\Stopwatch\Stopwatch;
/**
* Collects some data about a middleware.
*
* @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
*
* @experimental in 4.2
*/
class TraceableMiddleware implements MiddlewareInterface
{
private $stopwatch;
private $busName;
private $eventCategory;
public function __construct(Stopwatch $stopwatch, string $busName, string $eventCategory = 'messenger.middleware')
{
$this->stopwatch = $stopwatch;
$this->busName = $busName;
$this->eventCategory = $eventCategory;
}
/**
* {@inheritdoc}
*/
public function handle(Envelope $envelope, StackInterface $stack): Envelope
{
$stack = new TraceableStack($stack, $this->stopwatch, $this->busName, $this->eventCategory);
try {
return $stack->next()->handle($envelope, $stack);
} finally {
$stack->stop();
}
}
}
/**
* @internal
*/
class TraceableStack implements StackInterface
{
private $stack;
private $stopwatch;
private $busName;
private $eventCategory;
private $currentEvent;
public function __construct(StackInterface $stack, Stopwatch $stopwatch, string $busName, string $eventCategory)
{
$this->stack = $stack;
$this->stopwatch = $stopwatch;
$this->busName = $busName;
$this->eventCategory = $eventCategory;
}
/**
* {@inheritdoc}
*/
public function next(): MiddlewareInterface
{
if (null !== $this->currentEvent) {
$this->stopwatch->stop($this->currentEvent);
}
if ($this->stack === $nextMiddleware = $this->stack->next()) {
$this->currentEvent = 'Tail';
} else {
$class = \get_class($nextMiddleware);
$this->currentEvent = sprintf('"%s"', 'c' === $class[0] && 0 === strpos($class, "class@anonymous\0") ? get_parent_class($class).'@anonymous' : $class);
}
$this->currentEvent .= sprintf(' on "%s"', $this->busName);
$this->stopwatch->start($this->currentEvent, $this->eventCategory);
return $nextMiddleware;
}
public function stop(): void
{
if (null !== $this->currentEvent && $this->stopwatch->isStarted($this->currentEvent)) {
$this->stopwatch->stop($this->currentEvent);
}
$this->currentEvent = null;
}
}
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