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<?php |
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/** |
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* AppserverIo\Messaging\MessageQueueParser |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/messaging |
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* @link http://www.appserver.io |
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*/ |
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namespace AppserverIo\Messaging; |
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use AppserverIo\Psr\Socket\SocketInterface; |
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use AppserverIo\Psr\Pms\MessageQueueException; |
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/** |
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* This is a parser for a native message invocation. |
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* |
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* A method invokation must have the following format: |
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* |
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* <METHOD> <CONTENT-LENGTH> <PROTOCOL>/<VERSION>\r\n |
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* <CONTENT> |
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* |
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* for example: |
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* |
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* MSG 12 MQ/1.0 |
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* czoxOiIxIjs= |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/messaging |
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* @link http://www.appserver.io |
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*/ |
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class MessageQueueParser |
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{ |
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/** |
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* Parses the header of a message call call. |
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* |
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* @param string $line The header line to parse |
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* |
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* @return integer The content length to parse |
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* @throws \AppserverIo\Psr\Pms\MessageQueueException |
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*/ |
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public function parseHeader($line) |
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{ |
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// parse the header line with |
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list ($messageType, $contentLength, $protocolVersion) = explode(' ', trim($line)); |
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// check protocol and version |
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$this->checkProtocolAndVersion($protocolVersion); |
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// check the message type |
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switch ($messageType) { |
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case MessageQueueProtocol::MESSAGE_TYPE_MSG: |
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return (integer) $contentLength; |
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default: |
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throw new MessageQueueException(sprintf('Found invalid message type %s', $messageType)); |
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} |
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} |
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/** |
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* Parses the request body and tries to unpack the remote method |
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* instance from it. |
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* |
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* @param \AppserverIo\Psr\Socket\SocketInterface $connection The package remote method instance |
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* @param integer $contentLength The content length to read |
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* |
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* @return object The unpacked message object |
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*/ |
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public function parseBody(SocketInterface $connection, $contentLength) |
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{ |
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$rawResponse = stream_get_contents($connection->getConnectionResource(), $contentLength); |
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return MessageQueueProtocol::unpack($rawResponse); |
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} |
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/** |
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* Parses the message queue response and returns a response instance. |
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* |
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* @param string $line The response string to parse |
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* |
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* @return \AppserverIo\Messaging\QueueResponse The queue response instance |
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* @throws \AppserverIo\Psr\Pms\MessageQueueException Is thrown if we found an invalid status code |
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*/ |
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public function parseResult($line) |
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{ |
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// parse the header line with |
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list ($protocolVersion, $statusCode, $message, ) = explode(' ', trim($line)); |
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// check protocol and version |
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$this->checkProtocolAndVersion($protocolVersion); |
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// prepare the queue response |
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$responseMessages = MessageQueueProtocol::getResponseMessages(); |
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if (isset($responseMessages[$statusCode])) { |
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return new QueueResponse($statusCode, $message); |
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} |
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// we can't prepare the queue response because of an unknown status code |
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throw new MessageQueueException(sprintf('Found unknown status code %d', $statusCode)); |
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} |
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/** |
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* Checks if the protocol version specified in the request is valid. |
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* |
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* @param string $protocolVersion The protocol version specified in the request header |
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* |
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* @return void |
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* @throws \AppserverIo\Psr\Pms\MessageQueueException Is thrown if the protocol version is not supported |
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*/ |
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protected function checkProtocolAndVersion($protocolVersion) |
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{ |
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// parse protocol and version |
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list ($protocol, $version) = explode('/', $protocolVersion); |
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// check if protocol and version are valid |
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if ($protocol !== MessageQueueProtocol::PROTOCOL && $version !== MessageQueueProtocol::VERSION) { |
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throw new MessageQueueException(sprintf('Protocol %s not supported', $protocolVersion)); |
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} |
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} |
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} |
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appserver-io /
messaging
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