RabbitMQ:Direct Exchange
一.相关概念
Exchange:接收消息,并根据路由键转发消息到所绑定的队列。
属性:
name:名称
type:交换机类型direct/topic/fanout/headers
durability:是否需要持久化
auto delete:当最后一个绑定到Exchange上的队列删除后,自动删除该Exchange
internal:当前Exchange是否用于RabbitMQ内部使用,默认为false
Arguments:扩展参数,用于扩展AMQP协议自制使用。
二.Direct Exchange
所有发送到Direct Exchange的消息会被转发到RoutingKey中指定的QUEUE.
注意:Direct模式使用RabbitMQ自带的Exchange:Default Exchange,所以不需要将Exchange进行任何绑定操作。队列名和routingkey必须完全匹配,消息才能被队列接收。
三.消费者
public static void main(String[] args) throws IOException, TimeoutException, InterruptedException { //创建一个连接工厂 ConnectionFactory connectionFactory = new ConnectionFactory(); connectionFactory.setHost("192.168.10.132"); connectionFactory.setPort(5672); connectionFactory.setVirtualHost("/"); //创建连接 Connection connection = connectionFactory.newConnection(); //通过连接创建一个Channel Channel channel = connection.createChannel(); //创建一个队列 String exchangeName = "test_direct_exchange"; String exchangeType = "direct"; String queueName = "direct"; String routingKey = "test.direct"; String routingKey2 = "direct"; //声明一个交换机 channel.exchangeDeclare(exchangeName,exchangeType,true,false,false,null); //声明一个队列 channel.queueDeclare(queueName,false,false,false,null); //建立绑定关系 channel.queueBind(queueName,exchangeName,routingKey); channel.queueBind(queueName,exchangeName,routingKey2); //创建一个消费者 QueueingConsumer consumer = new QueueingConsumer(channel); //设置Channel channel.basicConsume(queueName,true,consumer); //获取消息 while (true){ QueueingConsumer.Delivery delivery = consumer.nextDelivery(); String msg = new String(delivery.getBody()); System.out.println("消费端:"+msg); } }
四.生产者
public static void main(String[] args) throws IOException, TimeoutException { //创建一个连接工厂 ConnectionFactory connectionFactory = new ConnectionFactory(); connectionFactory.setHost("192.168.10.132"); connectionFactory.setPort(5672); connectionFactory.setVirtualHost("/"); //创建连接 Connection connection = connectionFactory.newConnection(); //通过连接创建一个Channel Channel channel = connection.createChannel(); //通过Channel发送数据 channel.basicPublish("test_direct_exchange","direct",null,"test direct exchange".getBytes()); //关闭连接 channel.close(); connection.close(); }
关系拓扑:
生产者设置routingKey无论传direct或者传test.direct,都可以给消费者发送信息。但是设置其他的,消费者都无法接收消息。