前言:
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。
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!"); } /** * close link */ public function close() { $this->AMQPConnection->disconnect(); } /** Channel * @return AMQPChannel * @throws AMQPConnectionException */ public function channel() { if (!$this->AMQPChannel) { $this->AMQPChannel = new AMQPChannel($this->AMQPConnection); } return $this->AMQPChannel; } /** Exchange * @return AMQPExchange * @throws AMQPConnectionException * @throws AMQPExchangeException */ public function exchange() { if (!$this->AMQPExchange) { $this->AMQPExchange = new AMQPExchange($this->channel()); $this->AMQPExchange->setName($this->exchange); } return $this->AMQPExchange ; } /** queue * @return AMQPQueue * @throws AMQPConnectionException * @throws AMQPQueueException */ public function queue() { if (!$this->AMQPQueue) { $this->AMQPQueue = new AMQPQueue($this->channel()); } return $this->AMQPQueue ; } /** Envelope * @return AMQPEnvelope */ public function envelope() { if (!$this->AMQPEnvelope) { $this->AMQPEnvelope = new AMQPEnvelope(); } return $this->AMQPEnvelope; }}
3.2. 生产者类。
channel();//创建交换机对象$ex = $this->exchange();return $ex->publish($message, $this->route, AMQP_NOPARAM, array('delivery_mode' => 2));}}
3.3. 消费者。
exchange();// direct类型$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);//echo "Message Total:".$q->declareQueue()."";$q->declareQueue();//绑定交换机与队列,并指定路由键// echo 'Queue Bind: '.$q->bind($this->exchange, $this->route)."";$q->bind($this->exchange, $this->route);//阻塞模式接收消息// echo "Message:";if (!is_null($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); $mq->close(); }
2. 测试结果:
通过postman点击上面接口,控制台就可以看出多出了一个normal队列,并且队列的 Features 为“ D TTL DLX DLK ”,$param的消息也会首先进入“normal”队列。
2. 1分钟后(自己设置的),normal的消息会失效,进而开始添加到了死信队列“normal_dxl”,可以点击死信查看最新的消息信息。