概述

RabbitMQ是一款消息队列中间件。他提供了几乎覆盖所有语言的SDK与文档，简直强大的不的了。要详细的去了解学习RabbitMQ，我建议还是看官方文档吧。

消息队列有以下几个基本用途

异步处理

应用解耦

流量削峰

系统架构

消息队列的这几个用途我会在后续的文章以真实案例去表述

生产者

创建RabbitMQ链接

$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');$channel    = $connection->channel ();

与链接一个数据库概念差不多

创建一个队列声明

$channel->queue_declare ('hello');

创建多个队列与创建多个数据库一样,hello则是队列名

创建一条消息到队列

$message = new AMQPMessage('Hello World!');

发布消息到队列

$channel->basic_publish ($message, '', 'hello');

hello 是上面创建的队列声明

关闭链接

$channel->close ();$connection->close ();

释放资源

消费者

创建RabbitMQ链接

$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');$channel    = $connection->channel ();

与链接一个数据库概念差不多

创建一个队列声明

$channel->queue_declare ('hello');

创建多个队列与创建多个数据库一样,hello则是队列名

消费

$channel->basic_consume ('hello', '', false, true, false, false, function ($msg) {    echo ' [x] Received ', $msg->body, "\n";});

通过回调函数处理消息队列

等待

while (count ($channel->callbacks)) {    $channel->wait ();}

无消息时，挂起保持等待状态

关闭链接

$channel->close ();$connection->close ();

释放资源

完整的案例

完整的按钮则是上面所有代码的整理

生产者

$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');$channel    = $connection->channel ();$channel->queue_declare ('hello');$message = new AMQPMessage('Hello World!');$channel->basic_publish ($message, '', 'hello');$channel->close ();$connection->close ();

消费者

$connection = new AMQPStreamConnection('localhost', 5672, 'guest', 'guest');$channel    = $connection->channel ();$channel->queue_declare ('hello');// basic_consume 方法第7个方法可以直接传入函数$channel->basic_consume ('hello', '', false, true, false, false, function ($msg) {    echo ' [x] Received ', $msg->body, "\n";});while (count ($channel->callbacks)) {    $channel->wait ();}$channel->close ();$connection->close ();