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<?php
namespace SimpleQueue\Adapter;
use DateTime;
use PhpAmqpLib\Channel\AMQPChannel;
use PhpAmqpLib\Message\AMQPMessage;
use PhpAmqpLib\Wire\AMQPTable;
use SimpleQueue\Job;
use SimpleQueue\QueueAdapterInterface;
/**
* Class AmqpQueueAdapter
*
* @package SimpleQueue\Adapter
*/
class AmqpQueueAdapter implements QueueAdapterInterface
{
/**
* @var AMQPChannel
*/
protected $channel;
/**
* @var string
*/
protected $exchange = '';
/**
* @var string
*/
protected $queue = '';
/**
* AmqpQueueAdapter constructor.
*
* @param AMQPChannel $channel
* @param string $queue
* @param string $exchange
*/
public function __construct(AMQPChannel $channel, $queue, $exchange)
{
$this->channel = $channel;
$this->exchange = $exchange;
$this->queue = $queue;
}
/**
* Send a job
*
* @access public
* @param Job $job
* @return $this
*/
public function push(Job $job)
{
$message = new AMQPMessage($job->serialize(), array('content_type' => 'text/plain'));
$this->channel->basic_publish($message, $this->exchange);
return $this;
}
/**
* Schedule a job in the future
*
* @access public
* @param Job $job
* @param DateTime $dateTime
* @return $this
*/
public function schedule(Job $job, DateTime $dateTime)
{
$now = new DateTime();
$when = clone($dateTime);
$delay = $when->getTimestamp() - $now->getTimestamp();
$message = new AMQPMessage($job->serialize(), array('delivery_mode' => 2));
$message->set('application_headers', new AMQPTable(array('x-delay' => $delay)));
$this->channel->basic_publish($message, $this->exchange);
return $this;
}
/**
* Wait and get job from a queue
*
* @access public
* @return Job|null
*/
public function pull()
{
$message = null;
$this->channel->basic_consume($this->queue, 'test', false, false, false, false, function ($msg) use (&$message) {
$message = $msg;
$message->delivery_info['channel']->basic_cancel($message->delivery_info['consumer_tag']);
});
while (count($this->channel->callbacks)) {
$this->channel->wait();
}
if ($message === null) {
return null;
}
$job = new Job();
$job->setId($message->get('delivery_tag'));
$job->unserialize($message->getBody());
return $job;
}
/**
* Acknowledge a job
*
* @access public
* @param Job $job
* @return $this
*/
public function completed(Job $job)
{
$this->channel->basic_ack($job->getId());
return $this;
}
/**
* Mark a job as failed
*
* @access public
* @param Job $job
* @return $this
*/
public function failed(Job $job)
{
$this->channel->basic_nack($job->getId());
return $this;
}
}
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