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<?php |
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namespace Cmobi\RabbitmqBundle\Rpc; |
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use Cmobi\RabbitmqBundle\ConnectionManagerInterface; |
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use Cmobi\RabbitmqBundle\Rpc\Exception\RpcInvalidRequestException; |
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use Cmobi\RabbitmqBundle\Rpc\Exception\RpcInvalidResponseException; |
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use Cmobi\RabbitmqBundle\Rpc\Request\RpcRequest; |
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use Cmobi\RabbitmqBundle\Rpc\Request\RpcRequestCollection; |
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use Cmobi\RabbitmqBundle\Rpc\Response\RpcResponse; |
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use Cmobi\RabbitmqBundle\Rpc\Response\RpcResponseCollection; |
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use PhpAmqpLib\Channel\AbstractChannel; |
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use PhpAmqpLib\Connection\AMQPStreamConnection; |
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use PhpAmqpLib\Message\AMQPMessage; |
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abstract class RpcClient |
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{ |
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private $queue; |
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private $connection; |
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private $channel; |
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private $callbackQueue; |
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private $response; |
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private $requestCollection; |
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private $correlationId; |
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public function __construct($queueName, ConnectionManagerInterface $manager) |
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{ |
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$this->queue = $queueName; |
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$this->connection = $manager->getConnection(); |
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$this->channel = $this->connection->channel(); |
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$this->requestCollection = new RpcRequestCollection(); |
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} |
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/** |
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* @param AMQPMessage $rep |
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*/ |
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public function onResponse(AMQPMessage $rep) |
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{ |
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if($rep->get('correlation_id') == $this->correlationId) { |
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$this->response = $rep->body; |
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} |
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} |
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public function refreshChannel() |
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{ |
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$connection = $this->getConnection(); |
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$this->channel = $connection->channel(); |
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} |
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/** |
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* @return RpcResponseCollection |
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* @throws RpcInvalidRequestException |
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* @throws RpcInvalidResponseException |
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*/ |
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public function call() |
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{ |
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if ( |
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!$this->requestCollection instanceof RpcRequestCollection |
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|| $this->requestCollection->count() < 1 |
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) { |
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throw new RpcInvalidRequestException(); |
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} |
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$requestId = uniqid($this->queue); |
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$this->correlationId = $requestId; |
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$requests = []; |
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/** |
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* @var RpcRequest $request |
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*/ |
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foreach ($this->requestCollection as $request) { |
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if (is_null($request->id)) { |
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$request->id = $requestId; |
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} |
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$requests[] = $request->toArray(); |
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} |
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try { |
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$body = json_encode($requests); |
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} catch (\Exception $e) { |
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throw new RpcInvalidRequestException($e); |
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} |
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/* Send to Message Broker */ |
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$this->handleRequest($body); |
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$rpcResponse = $this->buildRpcResponseCollection(); |
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return $rpcResponse; |
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} |
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/** |
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* @param RpcRequest $request |
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*/ |
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public function addRequest(RpcRequest $request) |
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{ |
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$this->requestCollection->add($request); |
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} |
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/** |
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* @param RpcRequest $request |
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*/ |
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public function removeRequest(RpcRequest $request) |
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{ |
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$id = $this->requestCollection->getRequestIndex($request); |
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if (!$id) { |
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$this->requestCollection->remove($id); |
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} |
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} |
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/** |
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* @param RpcRequestCollection $requests |
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*/ |
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public function addRequestCollection(RpcRequestCollection $requests) |
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{ |
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$this->requestCollection = $requests; |
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} |
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/** |
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* @return RpcRequestCollection |
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*/ |
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public function getRequestCollection() |
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{ |
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return $this->requestCollection; |
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} |
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/** |
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* @param AbstractChannel $channel |
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*/ |
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public function setChannel(AbstractChannel $channel) |
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{ |
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$this->channel = $channel; |
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} |
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/** |
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* @return \PhpAmqpLib\Channel\AMQPChannel |
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*/ |
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public function getChannel() |
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{ |
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return $this->channel; |
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} |
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/** |
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* @return string |
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*/ |
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public function getQueueName() |
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{ |
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return $this->queue; |
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} |
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/** |
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* @return AMQPStreamConnection |
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*/ |
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public function getConnection() |
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{ |
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return $this->connection; |
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} |
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/** |
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* @param \PhpAmqpLib\Connection\AMQPStreamConnection $connection |
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*/ |
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public function setConnection(AMQPStreamConnection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* @param $body |
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*/ |
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private function handleRequest($body) |
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{ |
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list($callbackQueue, ,) = $this->getChannel()->queue_declare( |
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'', false, false, false, true |
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); |
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$this->callbackQueue = $callbackQueue; |
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$this->getChannel()->basic_consume( |
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$this->callbackQueue, '', false, false, false, false, |
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[$this, 'onResponse'] |
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); |
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$msg = new AMQPMessage( |
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(string)$body, |
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[ |
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'correlation_id' => $this->correlationId, |
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'reply_to' => $this->callbackQueue |
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] |
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); |
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$this->getChannel()->basic_publish($msg, '', $this->getQueueName()); |
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while(!$this->response) { |
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$this->getChannel()->wait(); |
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} |
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$this->getChannel()->close(); |
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$this->getConnection()->close(); |
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} |
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/** |
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* @return RpcResponseCollection |
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* @throws RpcInvalidResponseException |
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*/ |
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private function buildRpcResponseCollection() |
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{ |
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$responses = []; |
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try { |
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$responses = json_decode($this->response, true); |
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} catch (\Exception $e) { |
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throw new RpcInvalidResponseException($e); |
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} |
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$rpcResponse = new RpcResponseCollection(); |
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foreach ($responses as $responseArr) { |
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$response = new RpcResponse(); |
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$response->fromArray($responseArr); |
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$rpcResponse->add($response); |
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} |
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return $rpcResponse; |
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} |
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} |