消息队列控制灯代码_代码实现RabbitMQ死信队列的创建

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‍前言：‍

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之前有写过死信队列的使用场景以及通过管控台创建死信。这次就通过代码实现死信队列的创建，同时也分享一下RabbitMQ封装的类。

准备：

1. 先准备一个死信队列(最后用来消费)的参数配置，包括虚拟机，交换机，队列，有效时间等，如下。

2. 按照上面在RabbitMQ中创建虚拟机和交换机，死信队列。并让交换机与死信队列绑定，操作方法前面有介绍。

3. 这里就直接提供rabbitMQ操作的基本封装的类，包括一个基类，生产者类，消费者类。

3.1. 基类。

<?php namespace rabbitmq;class BaseMQ{public $AMQPChannel ;public $AMQPConnection ;public $AMQPEnvelope ;public $AMQPExchange ;public $AMQPQueue ;public $conf ;public $exchange ;public $queue;public $route;public $queueArgs;public function __construct($host,$options,$args = []){
        $config = include 'config/config.php';if (!$config)throw new \AMQPConnectionException('config error!');$this->host  = array_merge($config,$host);isset($options['vhost']) && $this->host['vhost'] = $options['vhost'];$this->exchange = $options['exchange'];$this->queue = $options['queue'];$this->route = $options['route'];$this->queueArgs = $args;$this->AMQPConnection = new \AMQPConnection($this->host);if (!$this->AMQPConnection->connect())throw new \AMQPConnectionException("Cannot connect to the broker!\n");
    }public function close(){$this->AMQPConnection->disconnect();
    }public function channel(){if (!$this->AMQPChannel) {$this->AMQPChannel = new \AMQPChannel($this->AMQPConnection);
        }return $this->AMQPChannel;
    }public function exchange(){if (!$this->AMQPExchange) {$this->AMQPExchange = new \AMQPExchange($this->channel());$this->AMQPExchange->setName($this->exchange);
        }return $this->AMQPExchange ;
    }public function queue(){if (!$this->AMQPQueue) {$this->AMQPQueue = new \AMQPQueue($this->channel());
        }return $this->AMQPQueue ;
    }public function envelope(){if (!$this->AMQPEnvelope) {$this->AMQPEnvelope = new \AMQPEnvelope();
        }return $this->AMQPEnvelope;
    }
}

3.2. 生产者类。

<?php namespace rabbitmq;class ProductMQ extends BaseMQ{/** 只控制发送成功 不接受消费者是否收到
	* @throws \AMQPChannelException
	* @throws \AMQPConnectionException
	* @throws \AMQPExchangeException
	*/public function publish($message){
		$message = is_array($message)?json_encode($message):$message;//频道
		$channel = $this->channel();//创建交换机对象
		$ex = $this->exchange();return $ex->publish($message, $this->route, AMQP_NOPARAM, array('delivery_mode' => 2));
	}
}

3.3. 消费者。

<?php namespace rabbitmq;class ConsumerMQ extends BaseMQ{public function run($processMessage){// 创建交换机
		$ex = $this->exchange();// direct类型
		$ex->setType(AMQP_EX_TYPE_DIRECT); // 持久化
		$ex->setFlags(AMQP_DURABLE);// 不存在就发布
		$ex->declareExchange();// 创建队列
		$q = $this->queue();// 设置队列名称
		$q->setName($this->queue);// 持久化
		$q->setFlags(AMQP_DURABLE); // 队列参数
		is_array($this->queueArgs) && $q->setArguments($this->queueArgs);
		$q->declareQueue();//绑定交换机与队列，并指定路由键// echo 'Queue Bind: '.$q->bind($this->exchange, $this->route)."\n";
		$q->bind($this->exchange, $this->route);//阻塞模式接收消息// echo "Message:\n";if (!is_null($processMessage)) {while (True) {
				$q->consume($processMessage);
			}
		}$this->close();
	}
}

编码：

上面的死信队列已经创建好了，接下来主要就是通过代码创建一个用于直接生产消息的普通队列，但是这个队列需要设置三个参数。

x-dead-letter-exchange：关联死信的交换机

x-dead-letter-routing-key     关联死信的路由key

x-message-ttl                 当前队列消息的有效期，也就是多久后消息自动进行死信队列，并且从本队列删除

1. 代码部分：

public function addToDlx()
    {
        $host = [
'host' => '127.0.0.1',
'port' => '5672',
'login' => 'guest',
'password' => 'guest',
'vhost' => 'report',
'heartbeat' => 60
        ];

// 普通队列
        $normal = [
'vhost' => 'report',                    // 虚拟机
'exchange' => 'normal',                 // 交换机
'route' => 'normal_route',              // 路由key - 用于交换机与队列进行绑定
'queue' => 'normal_queue',              // 队列
'expire' => 1000*60,                    // 有效时间单位：毫秒   - 1分钟
        ];

// 死信队列
        $normal_dlx = [
'vhost' => 'report',
'exchange' => 'normal_dlx',
'route' => 'normal_dlx_route',
'queue' => 'normal_dlx_queue'
        ];

// 给普通队列关联死信队列，携带的参数
        $dlx_args = [
'x-dead-letter-exchange' => $normal_dlx['exchange'],
'x-dead-letter-routing-key' => $normal_dlx['route'],
'x-message-ttl' => $normal['expire'],
        ];

 通过消费者方式创建死信队列/
        $dlx_mq = new ConsumerMQ($host,$normal,$dlx_args);
        $dlx_mq->run(null);

        //// 将消息放入普通队列/
        $mq = new ProductMQ($host, $normal);

        $param = json_encode([
'name' => 'test',
'id' => 11568,
'remark' => '测试一下'
        ]);

        $mq->publish($param);

        $mq->close();
    }