标签:删除 fir highlight and add string throw 结果 consumer
消息的确认:是指生产者投递消息后,如果Broker收到消息,则会给生产者一个应答。
生产者进行接收应答,用来确定这条消息是否正常的发送到Broker,这种方式也是消息的可靠性投递的核心保障。
生产端
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(); //指定消息的投递模式:消息的确认模式 channel.confirmSelect(); //通过Channel发送数据 channel.basicPublish("","hello",null,"hello world".getBytes()); //添加一个确认监听 channel.addConfirmListener(new ConfirmListener() { @Override public void handleAck(long deliveryTag, boolean multiple) throws IOException { System.out.println("----handleAck---"); } @Override public void handleNack(long deliveryTag, boolean multiple) throws IOException { System.out.println("----handleNack---"); } }); }
消费端:
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 queueName = "hello"; channel.queueDeclare(queueName,true,false,false,null); //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); } }
运行结果:
消费端:
生产端:
某些情况下,如果我们在发送消息的时候,当前的exchange不存在或者指定的路由key路由不到,这时候如果我们需要监听这种不可达的消息,就需要使用Return Listener
在API中有个一重要配置项:
Mandatory:如果为true,则监听器会接收到路由不可达的消息,然后进行后续处理,如果为false,则broker端自动删除该消息。
Return消息机制流程:
消费端跟上文一样,
生产端:
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(); channel.addReturnListener(new ReturnListener() { @Override public void handleReturn(int replyCode, String replyText, String exchange, String routingKey, AMQP.BasicProperties properties, byte[] body) throws IOException { System.out.println(replyCode); System.out.println(replyText); System.out.println(exchange); System.out.println(routingKey); System.out.println(properties); System.out.println(Arrays.toString(body)); } }); //通过Channel发送数据 // 在这里要设置Mandatory(第三个参数)为true,否则broker会自动删除消息 channel.basicPublish("","return",true,null,"hello world".getBytes()); }
打印结果:
RabbitMQ:Confirm确认消息 Return返回消息
标签:删除 fir highlight and add string throw 结果 consumer
原文地址:https://www.cnblogs.com/wwjj4811/p/12986683.html