/**
* Start listening on a queue using a messageListener-callback.
* A successful message consumption is automatically acknowledged.
*
* If {@link setTransactional()} is set to TRUE, each message processing is wrapped in a transaction with
* an explicit commit or rollback on exception.
*
* <code>
* $listener->listen('my_queue', function(\PhpAmqpLib\Message\AMQPMessage $message) {
* // process message
* ...
*
*
* // optional: cancel further listening
* Tx_Amqp_Messaging_AMQPUtils::cancelListening($message);
* });
* </code>
*
* @param string $queue The name of the queue
* @param callable $messageListener
* @throws InvalidArgumentException
*/
public function listen($queue, Closure $messageListener)
{
if ($queue === NULL) {
throw new \InvalidArgumentException('Queue must not be NULL.');
}
$connection = $this->connectionFactory->createConnection();
$channel = $connection->channel();
$this->addListener($queue, $channel, $messageListener);
while (sizeof($channel->callbacks) > 0) {
$channel->wait();
}
}
protected function getConnection()
{
if ($this->connection === NULL) {
$this->connection = $this->connectionFactory->createConnection();
}
return $this->connection;
}