/**
* Processes the request by invoking the request handler that attaches the message to the
* requested queue in a protected context.
*
* @param \AppserverIo\Psr\Servlet\Http\HttpServletRequestInterface $servletRequest The request instance
* @param \AppserverIo\Psr\Servlet\Http\HttpServletResponseInterface $servletResponse The response instance
*
* @return void
* @throws \Exception Is thrown if the requested message queue is not available
*/
public function invoke(HttpServletRequestInterface $servletRequest, HttpServletResponseInterface $servletResponse)
{
// load the application context
/** @var \AppserverIo\Appserver\Application\Application $application */
$application = $servletRequest->getContext();
// unpack the message
$message = MessageQueueProtocol::unpack($servletRequest->getBodyContent());
// load message queue name
$queueName = $message->getDestination()->getName();
// lookup the message queue manager and attach the message
$queueManager = $application->search('QueueContextInterface');
if ($messageQueue = $queueManager->lookup($queueName)) {
$messageQueue->attach($message);
} else {
throw new \Exception("Can\\'t find queue for message queue {$queueName}");
}
// finally dispatch this request, because we have finished processing it
$servletRequest->setDispatched(true);
}
/**
* Parses the message queue response and returns a response instance.
*
* @param string $line The response string to parse
*
* @return \AppserverIo\Messaging\QueueResponse The queue response instance
* @throws \AppserverIo\Psr\Pms\MessageQueueException Is thrown if we found an invalid status code
*/
public function parseResult($line)
{
// parse the header line with
list($protocolVersion, $statusCode, $message, ) = explode(' ', trim($line));
// check protocol and version
$this->checkProtocolAndVersion($protocolVersion);
// prepare the queue response
$responseMessages = MessageQueueProtocol::getResponseMessages();
if (isset($responseMessages[$statusCode])) {
return new QueueResponse($statusCode, $message);
}
// we can't prepare the queue response because of an unknown status code
throw new MessageQueueException(sprintf('Found unknown status code %d', $statusCode));
}
/**
* Sends a Message to the server by writing it to the socket.
*
* @param \AppserverIo\Psr\Pms\MessageInterface $message Holds the message to send
* @param boolean $validateResponse If this flag is TRUE, the queue connection validates the response code
*
* @return \AppserverIo\Messaging\QueueResponse The response of the message queue, or null
*
* @throws \Guzzle\Http\Exception\CurlException
* @throws \Exception
*/
public function send(MessageInterface $message, $validateResponse = false)
{
// connect to the server if necessary
$this->connect();
// serialize the message and write it to the socket
$packed = MessageQueueProtocol::pack($message);
// invoke the RMC with a number of retries
$maxRetries = 0;
$retry = true;
while ($retry) {
try {
// send a POST request
$request = $this->getSocket()->post($this->getPath(), array('timeout' => 5));
$request->setBody($packed);
$response = $request->send();
$retry = false;
} catch (CurlException $ce) {
$maxRetries++;
if ($maxRetries >= 5) {
$retry = false;
throw $ce;
}
}
}
// check if we should validate the response
if ($validateResponse && $response->getStatusCode() !== 200) {
throw new \Exception($response->getBody());
}
}
