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<?php |
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/* |
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* This file is part of JSON RPC Client. |
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* |
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* (c) Igor Lazarev <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Strider2038\JsonRpcClient\Transport\Socket; |
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use Strider2038\JsonRpcClient\Configuration\ConnectionOptions; |
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use Strider2038\JsonRpcClient\Exception\ConnectionFailedException; |
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use Strider2038\JsonRpcClient\Exception\ConnectionLostException; |
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use Strider2038\JsonRpcClient\Exception\RemoteProcedureCallFailedException; |
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/** |
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* @author Igor Lazarev <[email protected]> |
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*/ |
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class SocketClient |
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{ |
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/** |
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* @var SocketConnector |
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*/ |
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private $connector; |
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/** |
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* @var SocketConnection|null |
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*/ |
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private $connection; |
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/** |
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* Connection in URL format. |
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* |
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* @var string |
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*/ |
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private $url; |
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/** |
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* @var ConnectionOptions |
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*/ |
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private $options; |
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/** |
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* Request timeout in microseconds. |
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* |
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* @var int |
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*/ |
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private $requestTimeoutUs; |
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public function __construct( |
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SocketConnector $connector, |
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string $url, |
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ConnectionOptions $options, |
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int $requestTimeoutUs |
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) { |
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$this->connector = $connector; |
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$this->url = $url; |
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$this->options = $options; |
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$this->requestTimeoutUs = $requestTimeoutUs; |
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} |
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/** |
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* Sends request under socket client and returns response. |
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* |
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* @throws ConnectionFailedException when connection to server cannot be established |
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* @throws ConnectionLostException if connection to server was lost and request cannot be sent |
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* @throws RemoteProcedureCallFailedException if request to server was sent and response cannot be received. |
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* Be aware that request may be successfully processed by server, |
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* so resending the request may lead to inconsistent state |
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* of the server data. |
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*/ |
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public function send(string $request): string |
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{ |
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$connection = $this->getConnection(); |
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if ($connection->isClosed()) { |
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throw new ConnectionLostException($this->url, 'closed by server'); |
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} |
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$connection->sendRequest($request); |
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return $connection->receiveResponse(); |
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} |
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/** |
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* Forces new connection. Can be used to reconnect. |
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* |
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* @throws ConnectionFailedException |
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*/ |
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public function connect(): void |
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{ |
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unset($this->connection); |
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$this->connection = $this->createConnection(); |
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} |
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/** |
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* @throws ConnectionFailedException |
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*/ |
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private function getConnection(): SocketConnection |
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{ |
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if (null === $this->connection) { |
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$this->connection = $this->createConnection(); |
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} |
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return $this->connection; |
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} |
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/** |
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* @throws ConnectionFailedException |
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*/ |
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private function createConnection(): SocketConnection |
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{ |
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$connection = null; |
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$maxAttempts = $this->options->getMaxAttempts(); |
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$timeout = $this->options->getAttemptTimeoutUs(); |
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$multiplier = $this->options->getTimeoutMultiplier(); |
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$attempt = 0; |
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while (true) { |
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try { |
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$connection = $this->connector->open($this->url, $timeout, $this->requestTimeoutUs); |
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break; |
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} catch (ConnectionFailedException $exception) { |
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$attempt++; |
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if ($attempt >= $maxAttempts) { |
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break; |
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} |
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$this->connector->wait($timeout); |
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$timeout = (int) ($timeout * $multiplier); |
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} |
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} |
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if (null === $connection) { |
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throw new ConnectionFailedException($this->url, 'failed by timeout'); |
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} |
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return $connection; |
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} |
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} |
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strider2038 /
json-rpc-client
