simple queue(简单队列)

Virtual host-虚拟主机

虚拟主机，用于进行逻辑隔离，是最上层的路由，类似于redis的16个db,是一种逻辑上的隔离
一个virtualhost里面可以有若干个Exchange和Queue
同一个virtualhost里面不能有相同名称的Exchange和Queue

1.simple queue模型

2.创建一个连接工具类

package com.dwz.rabbitmq.util;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class ConnectionUtils {
    /**
     *     获取MQ的连接
     * @return
     * @throws TimeoutException
     * @throws IOException
     */
    public static Connection getConnection() throws IOException, TimeoutException {
        //定义一个连接工厂
        ConnectionFactory factory = new ConnectionFactory();
        //设置服务地址
        factory.setHost("127.0.0.1");
        //设置AMQP端口号
        factory.setPort(5672);
        //vhost
        factory.setVirtualHost("/vhost_dwz");
        factory.setUsername("root_dwz");
        factory.setPassword("123456");
        //设置网络断开时的自动重连
        factory.setAutomaticRecoveryEnabled(true);
        //每3秒重连一次
        factory.setNetworkRecoveryInterval(3000);
        return factory.newConnection();
    }
}

3.创建生产者

package com.dwz.rabbitmq.simple;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.dwz.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;

public class Send {
    private static final String QUEUE_NAME = "test_simple_queue";
    public static void main(String[] args) throws IOException, TimeoutException {
        //获取一个连接
        Connection connection = ConnectionUtils.getConnection();
        //从连接中获取一个通道
        Channel channel = connection.createChannel();
        //创建队列声明
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);

        String msg = "hello rabbitmq simple message!";
        //发布消息
        channel.basicPublish("", QUEUE_NAME, null, msg.getBytes());

        System.out.println("send msg--:" + msg);
        //关闭信道
        channel.close();
　　　　 //关闭连接
        connection.close();
    }
}

注：此时未指定exchange，所以该队列绑定的是rabbitmq提供的默认的exchange

即：

此时的exchange类型是direct（直连）方式

4.创建消费者

package com.dwz.rabbitmq.simple;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import com.dwz.rabbitmq.util.ConnectionUtils;
import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;

public class Receive {
    private static final String QUEUE_NAME = "test_simple_queue";
    public static void main(String[] args) throws IOException, TimeoutException {
        //获取一个连接
        Connection connection = ConnectionUtils.getConnection();
        //从连接中获取一个通道
        Channel channel = connection.createChannel();
        //队列声明
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        //定义消费者
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            //自动接收消息
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                    throws IOException {
                String msg = new String(body, "utf-8");
                System.out.println("consumer receive--:" + msg);
            }
        };
        //监听队列
        channel.basicConsume(QUEUE_NAME, consumer);
    }
}

5.运行代码

success!