RabbitMQ-消息队列延迟队列一

1、安装rabbitmq

怎么安装rabbitmq请查看之前课程，如果已经安装，请略过此步。

2、创建vendor文件夹或是直接采用PHP框架

mkdir vendor

3、进入文件

cd vendor

4、安装php扩展

composer require php-amqplib/php-amqplib

5、进入上级创建dead文件夹

cd ../
mkdir dead

6、进入dead文件并创建生产者php

cd dead
touch dead_pub.php

7、输入dead生产者内容

<?php
 
require_once  '../vendor/autoload.php';
 
 
use PhpAmqpLib\Connection\AMQPStreamConnection;
use PhpAmqpLib\Message\AMQPMessage;
use PhpAmqpLib\Wire\AMQPTable;
 
$v_host = 'order';
 
$exc_name ='exc_pay';
$routing_key = 'route_pay';
$queue_name = 'queue_pay';
$ttl = 20000;
 
$dead_exc_name = 'dead_exc_pay';
$dead_routing_key = 'dead_route_pay';
$dead_queue_name = 'dead_queue_pay';
 
 
$connection = new AMQPStreamConnection('localhost',5672,'wangyulong','wangyulong',$v_host);
 
$channel = $connection->channel();
 
 
$channel->exchange_declare($exc_name,'direct',false,false,false);
 
$args = new AMQPTable(['x-message-ttl'=>$ttl,'x-dead-letter-exchange'=>$dead_exc_name,'x-dead-letter-routing-key'=>$dead_routing_key]);
 
$channel->queue_declare($queue_name,false,true,false,false,false,$args);
 
$channel->queue_bind($queue_name,$exc_name,$routing_key);
 
//声明死信交换器  队列
 
$channel->exchange_declare($dead_exc_name,'direct',false,false,false);
 
$channel->queue_declare($dead_queue_name,false,true,false,false);
 
$channel->queue_bind($dead_queue_name,$dead_exc_name ,$dead_routing_key);
 
$data = 'this is dead message';
 
$msg = new AMQPMessage($data,['delivery_mode'=>AMQPMEssage::DELIVERY_MODE_PERSISTENT]);
 
 
$channel->basic_publish($msg,$exc_name,$routing_key);
 
$channel->close();
 
$connection->close();

8、创建消费者php

touch dead_worker.php

9、输入dead消费者内容

<?php
 
require_once  '../vendor/autoload.php';
 
use PhpAmqpLib\Connection\AMQPStreamConnection;
 
$v_host ='order';
 
$dead_exc_name = 'dead_exc_pay';
$dead_routing_key = 'dead_route_pay';
$dead_queue_name = 'dead_queue_pay';
 
$connection = new AMQPStreamConnection('localhost',5672,'wangyulong','wangyulong',$v_host);
 
$channel = $connection->channel();
 
$channel->exchange_declare($dead_exc_name,'direct',false,false,false);
 
 
$channel->queue_bind($dead_queue_name,$dead_exc_name,$dead_routing_key);
 
$callback = function($msg){
	echo 'received ' ,$msg->body,"\n";
	$msg->ack();
};
 
$channel->basic_qos(null,1,null);
 
$channel->basic_consume($dead_queue_name,'',false,false,false,false,$callback);
 
while($channel->is_open()){
	$channel->wait();
}
 
$channel->close();
 
$connection->close();

10、执行消费者

php dead_worker.php

11、执行生产者

php dead_pub.php

此时你会发现只有dead消费者并没有数据，而是退后2秒才有数据。这就是rabbitmq dead延迟队列工作模式硬实力