AMQP, Advanced Message Queuing Protocol, is an application layer standard advanced message queuing protocol that provides unified message services. It is an open standard for application layer protocols and is designed for message-oriented middleware. Clients and message middleware based on this protocol can transmit messages and are not restricted by different client/middleware products, different development languages, etc. Implementations in Erlang include RabbitMQ, etc.
abstract class AbstractChannel { const PROTOCOL_080 = '0.8'; const PROTOCOL_091 = '0.9.1'; public static $PROTOCOL_CONSTANTS_CLASS; public function __construct(AbstractConnection $connection, $channel_id) { $this->connection = $connection; $this->channel_id = $channel_id; $connection->channels[$channel_id] = $this; $this->frame_queue = array(); // Lower level queue for frames $this->method_queue = array(); // Higher level queue for methods $this->auto_decode = false; $this->msg_property_reader = new AMQPReader(null); $this->wait_content_reader = new AMQPReader(null); $this->dispatch_reader = new AMQPReader(null); $this->protocolVersion = self::getProtocolVersion(); switch ($this->protocolVersion) { case self::PROTOCOL_091: self::$PROTOCOL_CONSTANTS_CLASS = 'PhpAmqpLib\Wire\Constants091'; $c = self::$PROTOCOL_CONSTANTS_CLASS; $this->debug = new DebugHelper($c); $this->amqp_protocol_header = $c::$AMQP_PROTOCOL_HEADER; $this->protocolWriter = new Protocol091(); $this->waitHelper = new Wait091(); $this->methodMap = new MethodMap091(); break; case self::PROTOCOL_080: self::$PROTOCOL_CONSTANTS_CLASS = 'PhpAmqpLib\Wire\Constants080'; $c = self::$PROTOCOL_CONSTANTS_CLASS; $this->debug = new DebugHelper($c); $this->amqp_protocol_header = $c::$AMQP_PROTOCOL_HEADER; $this->protocolWriter = new Protocol080(); $this->waitHelper = new Wait080(); $this->methodMap = new MethodMap080(); break; default: throw new AMQPRuntimeException(sprintf( 'Protocol: %s not implemented.', $this->protocolVersion )); } }
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