rabbitmq 工作模式、简单模式

1.依赖

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <!-- 消息队列 -->
        <dependency>
            <groupId>com.rabbitmq</groupId>
            <artifactId>amqp-client</artifactId>
            <version>3.5.1</version>
        </dependency>

2.消息提供者

package com.jt.rabbitmq;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.junit.Test;

import com.rabbitmq.client.AMQP.BasicProperties;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class RabbitmqTest {
    @Test
    public void sendMsg() throws IOException{
        //1 获取连接
        ConnectionFactory conFactory = 
                new ConnectionFactory();
        conFactory.setVirtualHost("/jt");
        conFactory.setHost("192.168.174.141");
        conFactory.setPort(5672);
        conFactory.setUsername("jtadmin");
        conFactory.setPassword("jtadmin");
        Connection con = conFactory.newConnection();
        //2 得到channel
        Channel channle = con.createChannel();

        //3 创建队列
        String queue="orderQueue4";
        boolean durable=true;//队列会保存到硬盘
        boolean exclusive=false;//别的程序也能访问
        boolean autoDelete=false;//队列中的消息处理完了，不删除
        HashMap<String, Object> arguments=null;//队列的配置数据
        channle.queueDeclare(queue, durable, exclusive, autoDelete, arguments);

        //4 写数据
        String msg="order4";
        String exchange="";//默认使用default exchange
        String routingKey=queue;//使用队列名当做key
        //        BasicProperties props=null;//消息是否序列到硬盘上
        BasicProperties.Builder builder = new BasicProperties().builder();
        //值为2，把消息保存到硬盘上
        for(int i=1;i<=10;i++){
            builder.deliveryMode(2);
            BasicProperties props = builder.build();
            channle.basicPublish(exchange, routingKey, props, (msg+" "+i).getBytes());
        }


        //5关闭连接
        con.close();
        //        while (true) {
        //            
        //            
        //        }
    }
}

3.消息使用者

package com.jt.rabbitmq;

import java.io.IOException;
import java.util.HashMap;

import org.junit.Test;

import com.rabbitmq.client.AMQP.Queue.DeclareOk;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.ConsumerCancelledException;
import com.rabbitmq.client.QueueingConsumer;
import com.rabbitmq.client.QueueingConsumer.Delivery;
import com.rabbitmq.client.ShutdownSignalException;

public class RabbitmqConsumer {

    @Test
    public void getMsg() throws IOException, ShutdownSignalException, ConsumerCancelledException, InterruptedException{
        //获取连接
        ConnectionFactory factory = new ConnectionFactory();
        factory.setVirtualHost("/jt");
        factory.setHost("192.168.174.141");
        factory.setPort(5672);
        factory.setUsername("jtadmin");
        factory.setPassword("jtadmin");
        Connection connection = factory.newConnection();
        //获取通道
        Channel channle = connection.createChannel();
        //创建队列
        String queue="orderQueue4";
        boolean durable=true;//队列保存到硬盘
        boolean exclusive=false;//别的程序也能访问
        boolean autoDelete=false;//队列中的消息处理完了，不删除
        HashMap<String, Object> arguments=null;
        channle.queueDeclare(queue,
                durable, exclusive, autoDelete, arguments);

        //读数据
        QueueingConsumer consumer=new QueueingConsumer(channle);
        //自动确认，消费者收到消息，就自动给消息队列服务器发确认信息
        //消息队列服务器就会删除信息。
        boolean autoAck=false;
        //从orderQueue1队列取消息，消息放到consumser
        channle.basicConsume(queue, autoAck, consumer);
        
        //z启动了消费者
        System.out.println("启动了消费者");
        boolean isRunning=true;
        while(isRunning){
//            Thread.currentThread().sleep(1500);
            
            Delivery delivery = consumer.nextDelivery();
            //手动确认
            long tag=delivery.getEnvelope().getDeliveryTag();
            System.out.println(tag);
            
            byte[] body = delivery.getBody();
            String reuslt=new String(body);
            //告诉队列已取到了数据
            channle.basicAck(tag, true);
            System.out.println("result :"+reuslt);
        }
            

    }
}

4.总结

在此模式下，消息未确认仍能接收消息，但服务器会显示消息未确认