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<?php |
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namespace evseevnn\Cassandra; |
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use evseevnn\Cassandra\Cluster\Node; |
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use evseevnn\Cassandra\Enum; |
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use evseevnn\Cassandra\Exception\ConnectionException; |
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use evseevnn\Cassandra\Protocol\Frame; |
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use evseevnn\Cassandra\Protocol\Request; |
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use evseevnn\Cassandra\Protocol\Response; |
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class Connection { |
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/** |
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* @var Cluster |
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*/ |
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private $cluster; |
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/** |
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* @var Node |
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*/ |
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private $node; |
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/** |
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* @var resource |
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*/ |
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private $connection; |
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/** |
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* @param Cluster $cluster |
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*/ |
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public function __construct(Cluster $cluster) { |
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$this->cluster = $cluster; |
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} |
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public function connect() { |
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try { |
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$this->node = $this->cluster->getRandomNode(); |
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$this->connection = $this->node->getConnection(); |
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} catch (ConnectionException $e) { |
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$this->connect(); |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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public function disconnect() { |
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return socket_shutdown($this->connection); |
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} |
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/** |
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* @return bool |
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*/ |
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public function isConnected() { |
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return $this->connection !== null; |
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} |
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/** |
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* @param Request $request |
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* @return \evseevnn\Cassandra\Protocol\Response |
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*/ |
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public function sendRequest(Request $request) { |
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$frame = new Frame(Enum\VersionEnum::REQUEST, $request->getType(), $request); |
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socket_write($this->connection, $frame); |
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return $this->getResponse(); |
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} |
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/** |
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* @param $length |
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* @throws Exception\ConnectionException |
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* @return string |
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*/ |
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private function fetchData($length) { |
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$data = socket_read($this->connection, $length); |
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while (strlen($data) < $length) { |
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$data .= socket_read($this->connection, $length); |
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} |
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if (socket_last_error($this->connection) == 110) { |
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throw new ConnectionException('Connection timed out'); |
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} |
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return $data; |
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} |
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private function getResponse() { |
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$data = $this->fetchData(8); |
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$data = unpack('Cversion/Cflags/cstream/Copcode/Nlength', $data); |
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if ($data['length']) { |
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$body = $this->fetchData($data['length']); |
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} else { |
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$body = ''; |
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} |
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return new Response($data['opcode'], $body); |
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} |
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/** |
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* @return \evseevnn\Cassandra\Cluster\Node |
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*/ |
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public function getNode() { |
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return $this->node; |
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} |
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} |
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evseevnn /
php-cassandra-binary
