RabbitMQ API（三） Return 监听

Return 监听

• 就是路由失败监听；

消费者

package com.bfxy.rabbitmq.api.returnlistener;

import com.bfxy.rabbitmq.Application;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;

public class Consumer {
    
    public static void main(String[] args) throws Exception {
        
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Application.HOST);
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        Connection connection = connectionFactory.newConnection();

        Channel channel = connection.createChannel();
        
        String exchangeName = "test_return_exchange";
        String routingKey = "return.#";
        String queueName = "test_return_queue";
        
        channel.exchangeDeclare(exchangeName, "topic", true, false, null);
        channel.queueDeclare(queueName, true, false, false, null);
        channel.queueBind(queueName, exchangeName, routingKey);
        
        QueueingConsumer queueingConsumer = new QueueingConsumer(channel);
        channel.basicConsume(queueName, true, queueingConsumer);
        
        while(true){
            Delivery delivery = queueingConsumer.nextDelivery();
            String msg = new String(delivery.getBody());
            System.err.println("消费者: " + msg);
        }
        
    }

}

生产者

• 当路由失败时，会走 Return Listener；

package com.bfxy.rabbitmq.api.returnlistener;

import java.io.IOException;

import com.bfxy.rabbitmq.Application;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.ReturnListener;
import com.rabbitmq.client.AMQP.BasicProperties;

public class Producer {
    
    public static void main(String[] args) throws Exception {
        
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Application.HOST);
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        
        Connection connection = connectionFactory.newConnection();

        Channel channel = connection.createChannel();
        
        String exchange = "test_return_exchange";
        String routingKey = "return.save";
        String routingKeyError = "abc.save";
        
        String msg = "Hello RabbitMQ Return Message";
        
        channel.addReturnListener(new ReturnListener() {
            @Override
            public void handleReturn(int replyCode, String replyText, String exchange,
                    String routingKey, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.err.println("---------handle  return----------");
                System.err.println("replyCode: " + replyCode);
                System.err.println("replyText: " + replyText);
                System.err.println("exchange: " + exchange);
                System.err.println("routingKey: " + routingKey);
                System.err.println("properties: " + properties);
                System.err.println("body: " + new String(body));
            }
        });
        
        
        channel.basicPublish(exchange, routingKeyError, true, null, msg.getBytes());
        
        //channel.basicPublish(exchange, routingKeyError, true, null, msg.getBytes());

    }

}

监听内容

---------handle  return----------
replyCode: 312
replyText: NO_ROUTE
exchange: test_return_exchange
routingKey: abc.save
properties: #contentHeader(content-type=null, content-encoding=null, headers=null, delivery-mode=null, priority=null, correlation-id=null, reply-to=null, expiration=null, message-id=null, timestamp=null, type=null, user-id=null, app-id=null, cluster-id=null)
body: Hello RabbitMQ Return Message