rabbitmq 延迟消息 php 插件 rabbitmq_delayed_message_exchange_rabbitmq_delayed_message_exchange-20171215-3.6.x.e

大部分介绍的rabbitmq都是利用ttl与死信的方式，rabbitmq提供的插件rabbitmq_delayed_message_exchange可以很好的实现延迟消息的功能，找了半天，网上居然没有php的例子，继而摸索了一下，参考了java的代码，总结如下：

安装流程：

下载 wget https://dl.bintray.com/rabbitmq/community-plugins/3.6.x/rabbitmq_delayed_message_exchange/rabbitmq_delayed_message_exchange-20171215-3.6.x.zip
 解压 unzip rabbitmq_delayed_message_exchange-20171215-3.6.x.zip
 移动到插件目录  mv rabbitmq_delayed_message_exchange-20171215-3.6.x.ez /usr/lib/rabbitmq/lib/rabbitmq_server-3.6.15/plugins/
 启动 rabbitmq-plugins enable rabbitmq_delayed_message_exchange

对于代码来讲，首先对于发布者核心变化的代码

 $ex = new \AMQPExchange($channel);   
 $ex->setName($e_name); 
 $ex->setType('x-delayed-message'); 
 $ex->setArgument('x-delayed-type','direct');
 $ex->publish($message, $k_route,AMQP_NOPARAM,['headers' => ['x-delay