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<?php |
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namespace AmqpWorkers; |
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use AmqpWorkers\Definition\Exchange; |
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use AmqpWorkers\Definition\Queue; |
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use AmqpWorkers\Exception\ProducerNotProperlyConfigured; |
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use PhpAmqpLib\Channel\AMQPChannel; |
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use PhpAmqpLib\Connection\AbstractConnection; |
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use PhpAmqpLib\Message\AMQPMessage; |
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/** |
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* Producer is an object that sends something into AMQP exchange. |
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* It can format given messages somehow and can work with both queues and exchanges as a target. |
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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 Producer |
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{ |
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/** |
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* @var callable |
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*/ |
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private $formatter; |
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/** |
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* @var bool |
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*/ |
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private $isExchange; |
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/** |
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* @var Queue |
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*/ |
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protected $queue; |
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/** |
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* @var Exchange |
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*/ |
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protected $exchange; |
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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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* Simple fluent constructor to avoid weird-looking constructions like |
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* |
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* ```php |
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* $qos = (new Producer())->toExchange(); |
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* ``` |
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* |
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* @param AbstractConnection $connection |
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* @return Producer $this |
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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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* Producer 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 = $connection; |
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$this->withFormatter(function ($message) { |
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return (string)$message; |
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}); |
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} |
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/** |
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* @param Exchange $exchange |
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* @return Producer $this |
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*/ |
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public function withExchange(Exchange $exchange) |
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{ |
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$this->exchange = $exchange; |
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$this->isExchange = true; |
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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 Producer $this |
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*/ |
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public function withQueue(Queue $queue) |
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{ |
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$this->queue = $queue; |
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$this->isExchange = false; |
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return $this; |
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} |
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/** |
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* @param \Closure|callable $formatter |
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* @return Producer $this |
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* @throws ProducerNotProperlyConfigured |
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*/ |
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public function withFormatter($formatter) |
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{ |
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if (!is_callable($formatter)) { |
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throw new ProducerNotProperlyConfigured('Formatter must be a callable.'); |
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} |
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$this->formatter = $formatter; |
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return $this; |
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} |
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/** |
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* @param mixed $payload |
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* @todo: maybe add properties array as second parameter |
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* @throws ProducerNotProperlyConfigured if queue nor exchange not given. |
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*/ |
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public function produce($payload) |
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{ |
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if ($this->isExchange()) { |
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$this->getChannel()->basic_publish( |
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$this->createMessage($payload), |
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$this->exchange->getName() |
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); |
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} else { |
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$this->getChannel()->basic_publish( |
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$this->createMessage($payload), |
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'', |
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$this->queue->getName() |
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); |
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} |
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} |
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/** |
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* Returns `true` if producer is properly configured. Throws exception otherwise. |
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* Function is public just because Consumer needs to check if given producer configured before consuming the queue. |
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* |
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* @return bool |
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* @throws ProducerNotProperlyConfigured |
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*/ |
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public function selfCheck() |
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{ |
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if ($this->exchange === null && $this->queue === null) { |
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throw new ProducerNotProperlyConfigured('Nor queue nor exchange given.'); |
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} |
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return true; |
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} |
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/** |
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* @return AMQPChannel |
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* @throws ProducerNotProperlyConfigured |
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*/ |
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protected function getChannel() |
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{ |
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$this->selfCheck(); |
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$channel = $this->connection->channel(); |
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if ($this->isExchange()) { |
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list ($passive, $durable, $autoDelete, $internal, $nowait, $arguments, $ticket) = |
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$this->exchange->listParams(); |
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$channel->exchange_declare( |
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$this->exchange->getName(), |
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$this->exchange->getType(), |
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$passive, |
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$durable, |
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$autoDelete, |
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$internal, |
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$nowait, |
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$arguments, |
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$ticket |
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); |
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} else { |
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list ($passive, $durable, $exclusive, $autoDelete, $nowait, $arguments, $ticket) = |
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$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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} |
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return $channel; |
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} |
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/** |
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* @param mixed $payload |
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* @return AMQPMessage |
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*/ |
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protected function createMessage($payload) |
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{ |
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return new AMQPMessage(call_user_func($this->formatter, $payload)); |
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} |
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/** |
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* @return bool |
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*/ |
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protected function isExchange() |
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{ |
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return $this->isExchange; |
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} |
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} |
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enl /
amqpworkers
