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<?php namespace Illuminate\Queue;
use Illuminate\Queue\Jobs\Job;
use Illuminate\Events\Dispatcher;
use Illuminate\Queue\Failed\FailedJobProviderInterface;
class Worker {
/**
* The queue manager instance.
*
* @var \Illuminate\Queue\QueueManager
*/
protected $manager;
/**
* The failed job provider implementation.
*
* @var \Illuminate\Queue\Failed\FailedJobProviderInterface
*/
protected $failer;
/**
* The event dispatcher instance.
*
* @var \Illuminate\Events\Dispatcher
*/
protected $events;
/**
* Create a new queue worker.
*
* @param \Illuminate\Queue\QueueManager $manager
* @param \Illuminate\Queue\Failed\FailedJobProviderInterface $failer
* @param \Illuminate\Events\Dispatcher $events
* @return void
*/
public function __construct(QueueManager $manager,
FailedJobProviderInterface $failer = null,
Dispatcher $events = null)
{
$this->failer = $failer;
$this->events = $events;
$this->manager = $manager;
}
/**
* Listen to the given queue.
*
* @param string $connectionName
* @param string $queue
* @param int $delay
* @param int $memory
* @param int $sleep
* @param int $maxTries
* @return void
*/
public function pop($connectionName, $queue = null, $delay = 0, $memory = 128, $sleep = 3, $maxTries = 0)
{
$connection = $this->manager->connection($connectionName);
$job = $this->getNextJob($connection, $queue);
// If we're able to pull a job off of the stack, we will process it and
// then make sure we are not exceeding our memory limits for the run
// which is to protect against run-away memory leakages from here.
if ( ! is_null($job))
{
$this->process(
$this->manager->getName($connectionName), $job, $maxTries, $delay
);
}
else
{
$this->sleep($sleep);
}
}
/**
* Get the next job from the queue connection.
*
* @param \Illuminate\Queue\Queue $connection
* @param string $queue
* @return \Illuminate\Queue\Jobs\Job|null
*/
protected function getNextJob($connection, $queue)
{
if (is_null($queue)) return $connection->pop();
foreach (explode(',', $queue) as $queue)
{
if ( ! is_null($job = $connection->pop($queue))) return $job;
}
}
/**
* Process a given job from the queue.
*
* @param string $connection
* @param \Illuminate\Queue\Jobs\Job $job
* @param int $maxTries
* @param int $delay
* @return void
*
* @throws \Exception
*/
public function process($connection, Job $job, $maxTries = 0, $delay = 0)
{
if ($maxTries > 0 && $job->attempts() > $maxTries)
{
return $this->logFailedJob($connection, $job);
}
try
{
// First we will fire off the job. Once it is done we will see if it will
// be auto-deleted after processing and if so we will go ahead and run
// the delete method on the job. Otherwise we will just keep moving.
$job->fire();
if ($job->autoDelete()) $job->delete();
}
catch (\Exception $e)
{
// If we catch an exception, we will attempt to release the job back onto
// the queue so it is not lost. This will let is be retried at a later
// time by another listener (or the same one). We will do that here.
if ( ! $job->isDeleted()) $job->release($delay);
throw $e;
}
}
/**
* Log a failed job into storage.
*
* @param string $connection
* @param \Illuminate\Queue\Jobs\Job $job
* @return void
*/
protected function logFailedJob($connection, Job $job)
{
if ($this->failer)
{
$this->failer->log($connection, $job->getQueue(), $job->getRawBody());
$job->delete();
$this->raiseFailedJobEvent($connection, $job);
}
}
/**
* Raise the failed queue job event.
*
* @param string $connection
* @param \Illuminate\Queue\Jobs\Job $job
* @return void
*/
protected function raiseFailedJobEvent($connection, Job $job)
{
if ($this->events)
{
$data = json_decode($job->getRawBody(), true);
$this->events->fire('illuminate.queue.failed', array($connection, $job, $data));
}
}
/**
* Sleep the script for a given number of seconds.
*
* @param int $seconds
* @return void
*/
public function sleep($seconds)
{
sleep($seconds);
}
/**
* Get the queue manager instance.
*
* @return \Illuminate\Queue\QueueManager
*/
public function getManager()
{
return $this->manager;
}
/**
* Set the queue manager instance.
*
* @param \Illuminate\Queue\QueueManager $manager
* @return void
*/
public function setManager(QueueManager $manager)
{
$this->manager = $manager;
}
}
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