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纯PHP AMQP库

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纯PHP AMQP库

AMQP，即Advanced Message Queuing Protocol,一个提供统一消息服务的应用层标准高级消息队列协议,是应用层协议的一个开放标准,为面向消息的中间件设计。基于此协议的客户端与消息中间件可传递消息，并不受客户端/中间件不同产品，不同的开发语言等条件的限制。Erlang中的实现有 RabbitMQ等。

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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