/**
* Tries to get the result for given result ID from RabbitMQ.
*
* @throws AMQPTimeoutException
* @param string $resultId The UUID of the result to getc
* @param int $timeout Timeout in seconds after which the fetching shall stop
* @returns string JSON encoded data string
*/
public function getResult($resultId, $timeout = null)
{
if (is_null($timeout)) {
$timeout = $this->timeout;
}
$hashId = Common::getHash($resultId, $this->amqNumQueues);
$resultQueue = $this->getResultQueue($hashId);
$this->waitId = $resultId;
Common::$lg->addDebug(sprintf("Client waiting for request %s during %ds on %s (exchange %s)", $resultId, $timeout, $resultQueue, $this->resultExchange));
$this->resultChannel->basic_consume($resultQueue, '', false, false, false, false, array($this, 'onResult'));
while (!$this->response) {
try {
$this->resultChannel->wait(null, false, $timeout);
} catch (AMQPTimeoutException $e) {
Common::$lg->addCritical("Client hit the fan after {$timeout}s");
throw $e;
}
}
$res = json_decode($this->response);
$data = $res->{'data'};
$this->response = null;
return $data;
}
/**
* Puts a result on a RabbitMQ queue over AMQP.
*
* Puts the data for the given result ID (UUID, version 4) on RabbitMQ
* queue.
*
* @param string $resultId The UUID of the result to put
* @param string $data Data to submit
* @returns void
*/
public function putResult($resultId, $data)
{
$routingKey = $resultId;
$hashId = Common::getHash($routingKey, $this->amqNumQueues);
$resultQueue = $this->getResultQueue($hashId);
$body = array('result_id' => $resultId, 'data' => $data);
$serializedBody = json_encode($body);
$message = new AMQPMessage($serializedBody, array('content_type' => Constants\AMQ::CONTENT_TYPE, 'content_encoding' => $this->msgEncoding, 'delivery_mode' => Constants\AMQ::DELIVERY_MODE, 'correlation_id' => $hashId));
$this->resultChannel->basic_publish($message, $this->resultExchange, $hashId);
Common::$lg->addDebug("Server published result {$resultId} within {$resultQueue} -> {$this->resultExchange}");
}