PHP AMQP RABBITMQ Introduction and use

AMQP, the advanced message Queuing Protocol, an application-layer standard premium Messaging queuing protocol that provides unified messaging services, is an open standard for application-layer protocols designed for message-oriented middleware. The client and message middleware based on this protocol can deliver the message, and it is not restricted by the different products of client/middleware, different development language and other conditions. The implementations in Erlang are RABBITMQ and so on.

RabbitMQ is an open-source implementation of AMQP (advanved Message Queue) developed by Erlang.

Several concept notes:

Broker: The Message Queuing server entity is simply the case. Exchange: A message switch that specifies what rules the message is routed to and to which queue. Queue: A message queue carrier in which each message is put into one or more queues. Binding: Bind, which is the role of binding exchange and queue according to routing rules. Routing key: The routing keyword, exchange messages are delivered based on this keyword. Vhost: Virtual host, a broker can open multiple vhost, as a separate user permissions. Producer: The message producer is the program that delivers the message. Consumer: The message consumer is the program that receives the message. Channel: The message channels, in each connection of the client, multiple channels can be established, each channel represents a session task.

The use of Message Queuing is probably as follows:

(1) The client connects to the Message Queuing server and opens a channel. (2) The client declares an exchange and sets the related properties. (3) The client declares a queue and sets the related properties. (4) The client uses routing key to establish a good binding relationship between Exchange and queue. (5) Clients post messages to exchange.
(6) When Exchange receives a message, the message is posted to one or more queues

In PHP, the AMQP extension provides several classes and a series of methods to help us accept and send messages

Function class

Amqpchannel A connection connection can establish multiple channel, which can be understood as a logical connection
Amqpconnection refers to a physical connection, a client and a server have a connection between
Amqpenvelope Message Pack
Amqpexchange Message Switch
Amqpqueue queue

Exception class

Amqpexception
Amqpqueueexception
Amqpconnectionexception
Amqpchannelexception
Amqpexchangeexception

Create a connection

1new amqpconnection (array(2     ' host ' = ' example.host ', 3     ' Vhost ' = + '/',4     ' port ' = 5763,5     ' login ' = ' user ',6     ' Password ' = ' password '7 );

Create Channel

1 $channel New Amqpchannel ($connection);

Create a switch

1 $exchange New Amqpexchange ($channel); 2 $exchange->setname ($e3$exchange, _name,setType //  4$exchange// Persistence

PHP AMQP RABBITMQ Introduction and use