RabbitMQ-消息队列延迟队列二

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delay文件夹

cd ../
mkdir delay

6、进入delay文件并创建生产者php

cd delay
touch delay_pub.php

7、输入delay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 ='delay_exc_pay';
$routing_key = 'delay_route_pay';
$queue_name = 'delay_queue_pay';
$ttl = 20000;
$connection = new AMQPStreamConnection('localhost',5672,'wangyulong','wangyulong',$v_host);

$channel = $connection->channel();

$channel->exchange_declare($exc_name,'x-delayed-message',false,true,false);

$args = new AMQPTable(['x-delayed-type'=>'direct']);

$channel->queue_declare($queue_name,false,true,false,false,false,$args);

$channel->queue_bind($queue_name,$exc_name,$routing_key);
$data = 'this is dead message';

$arr = ['delivery_mode'=>AMQPMEssage::DELIVERY_MODE_PERSISTENT,'application_headers'=>new AMQPTable(['x-delay'=>$ttl])];

$msg = new AMQPMessage($data,$arr);

$channel->basic_publish($msg,$exc_name,$routing_key);

$channel->close();

$connection->close();

8、创建消费者php

touch delay_worker.php

9、输入delay消费者内容

<?php

require_once  '../vendor/autoload.php';

use PhpAmqpLib\Connection\AMQPStreamConnection;

$v_host ='order';

$exc_name ='delay_exc_pay';
$routing_key = 'delay_route_pay';
$queue_name = 'delay_queue_pay';

$connection = new AMQPStreamConnection('localhost',5672,'wangyulong','wangyulong',$v_host);

$channel = $connection->channel();

$channel->exchange_declare($exc_name,'x-delayed-message',false,true,false);


$channel->queue_bind($queue_name,$exc_name,$routing_key);

$callback = function($msg){
	echo 'received ' ,$msg->body,"\n";
	$msg->ack();
};

$channel->basic_qos(null,1,null);

$channel->basic_consume($queue_name,'',false,false,false,false,$callback);

while($channel->is_open()){
	$channel->wait();
}

$channel->close();

$connection->close();

10、执行消费者

php delay_worker.php

11、执行生产者

php delay_pub.php

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

延迟队列需要提前添加交换机