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<?php |
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namespace AmqpWorkers; |
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use AmqpWorkers\Definition\Qos; |
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use AmqpWorkers\Definition\Queue; |
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use AmqpWorkers\Exception\ConsumerNotProperlyConfigured; |
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use AmqpWorkers\Exception\ProducerNotProperlyConfigured; |
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use AmqpWorkers\Worker\WorkerInterface; |
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use PhpAmqpLib\Connection\AbstractConnection; |
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use PhpAmqpLib\Message\AMQPMessage; |
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/** |
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* Consumer is an object which connects to an AMQP queue, retrieves messages and sends them to a Worker. |
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* |
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* @package AmqpWorkers |
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* @author Alex Panshin <[email protected]> |
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* @since 1.0 |
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*/ |
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class Consumer |
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{ |
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/** |
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* @var AbstractConnection |
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*/ |
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private $connection; |
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/** |
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* @var null|Qos |
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*/ |
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private $qos; |
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/** |
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* @var Queue |
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*/ |
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private $queue; |
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/** |
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* @var WorkerInterface |
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*/ |
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private $worker; |
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/** |
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* @var null|Producer |
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*/ |
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private $producer; |
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/** |
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* Simple fluent constructor to avoid weird-looking constructions like |
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* |
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* ```php |
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* $qos = (new Consumer())->run(); |
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* ``` |
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* |
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* @param AbstractConnection $connection |
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* @return Consumer |
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*/ |
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public static function factory(AbstractConnection $connection) |
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{ |
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return new static($connection); |
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} |
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/** |
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* Consumer constructor. |
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* @param AbstractConnection $connection |
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*/ |
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public function __construct(AbstractConnection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* @param Qos $qos |
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* @return Consumer $this |
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*/ |
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public function withQos(Qos $qos) |
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{ |
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$this->qos = $qos; |
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return $this; |
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} |
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/** |
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* @param Queue $queue |
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* @return Consumer $this |
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*/ |
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public function withQueue(Queue $queue) |
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{ |
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$this->queue = $queue; |
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return $this; |
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} |
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/** |
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* @param WorkerInterface $worker |
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* @return Consumer $this |
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* @throws \AmqpWorkers\Exception\ConsumerNotProperlyConfigured |
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*/ |
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public function withWorker(WorkerInterface $worker) |
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{ |
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$this->worker = $worker; |
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return $this; |
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} |
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/** |
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* If producer is set, Consumer will call `Producer::produce` with whatever Worker will return |
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* |
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* @param Producer $producer |
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* @return Consumer $this |
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*/ |
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public function produceResult(Producer $producer) |
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{ |
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$this->producer = $producer; |
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return $this; |
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} |
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/** |
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* Starts consumer. By default, this function can be terminated only by Worker's exception |
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* |
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* @throws ConsumerNotProperlyConfigured |
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* @throws ProducerNotProperlyConfigured if given producer is not properly configured |
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*/ |
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public function run() |
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{ |
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if ($this->queue === null) { |
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throw new ConsumerNotProperlyConfigured('Queue is not defined.'); |
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} |
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if ($this->worker === null) { |
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throw new ConsumerNotProperlyConfigured('Worker is not defined.'); |
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} |
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$this->producer && $this->producer->selfCheck(); |
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$wrapper = function (AMQPMessage $message) { |
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$result = call_user_func($this->worker, $message->getBody()); |
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if ($result && $this->producer) { |
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$this->producer->produce($result); |
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} |
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$message->delivery_info['channel']->basic_ack($message->delivery_info['delivery_tag']); |
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}; |
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$channel = $this->connection->channel(); |
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// declare queue here |
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list ($passive, $durable, $exclusive, $autoDelete, $nowait, $arguments, $ticket) = $this->queue->listParams(); |
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$channel->queue_declare( |
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$this->queue->getName(), |
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$passive, |
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$durable, |
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$exclusive, |
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$autoDelete, |
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$nowait, |
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$arguments, |
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$ticket |
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); |
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if ($this->qos) { |
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list ($size, $count, $global) = $this->qos->listParams(); |
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$channel->basic_qos($size, $count, $global); |
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} |
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$channel->basic_consume($this->queue->getName(), '', false, false, false, false, $wrapper, null, []); |
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while (count($channel->callbacks)) { |
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$channel->wait(); |
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} |
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$channel->close(); |
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} |
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} |
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enl /
amqpworkers
