docker启动rabbitmq以及使用方式详解_云虚拟主机

搜索rabbitmq镜像

docker search rabbitmq:management

下载镜像

docker pull rabbitmq:management

启动容器

docker run -d --hostname localhost --name rabbitmq -p 15672:15672 -p 5672:5672 rabbitmq:management

打印容器

docker logs rabbitmq

访问rabbitmq management

http://localhost:15672

账户密码默认:guest

编写生产者类

package com.xun.rabbitmqdemo.example;

import com.rabbitmq.client.channel;
import com.rabbitmq.client.connection;
import com.rabbitmq.client.connectionfactory;
import java.io.ioexception;
import java.util.concurrent.timeoutexception;

public class producer {
    private final static string queue_name = "hello";
    public static void main(string[] args) throws ioexception, timeoutexception {
        connectionfactory factory = new connectionfactory();
        factory.setusername("guest");
        factory.setpassword("guest");
        factory.sethost("localhost");
        factory.setport(5672);
        factory.setvirtualhost("/");

        connection connection = factory.newconnection();

        channel channel = connection.createchannel();
        /**
         * 生成一个queue队列
         * 1、队列名称 queue_name
         * 2、队列里面的消息是否持久化(默认消息存储在内存中)
         * 3、该队列是否只供一个consumer消费 是否共享 设置为true可以多个消费者消费
         * 4、是否自动删除 最后一个消费者断开连接后 该队列是否自动删除
         * 5、其他参数
         */
        channel.queuedeclare(queue_name,false,false,false,null);
        string message = "hello world!";
        /**
         * 发送一个消息
         * 1、发送到哪个exchange交换机
         * 2、路由的key
         * 3、其他的参数信息
         * 4、消息体
         */
        channel.basicpublish("",queue_name,null,message.getbytes());
        system.out.println(" [x] sent '"+message+"'");

        channel.close();
        connection.close();
    }
}

运行该方法，可以看到控制台的打印

name=hello的队列收到message

消费者

package com.xun.rabbitmqdemo.example;

import com.rabbitmq.client.*;
import java.io.ioexception;
import java.util.concurrent.timeoutexception;

public class receiver {
    private final static string queue_name = "hello";
    public static void main(string[] args) throws ioexception, timeoutexception {
        connectionfactory factory = new connectionfactory();
        factory.setusername("guest");
        factory.setpassword("guest");
        factory.sethost("localhost");
        factory.setport(5672);
        factory.setvirtualhost("/");
        factory.setconnectiontimeout(600000);//milliseconds
        factory.setrequestedheartbeat(60);//seconds
        factory.sethandshaketimeout(6000);//milliseconds
        factory.setrequestedchannelmax(5);
        factory.setnetworkrecoveryinterval(500);

        connection connection = factory.newconnection();
        channel channel = connection.createchannel();

        channel.queuedeclare(queue_name,false,false,false,null);
        system.out.println("waiting for messages. ");

        consumer consumer = new defaultconsumer(channel) {
            @override
            public void handledelivery(string consumertag, envelope envelope, amqp.basicproperties properties,byte[] body) throws ioexception {
                string message = new string(body, "utf-8");
                system.out.println(" [x] received '" + message + "'");
            }
        };
        channel.basicconsume(queue_name,true,consumer);
    }
}

工作队列

rabbitmqutils工具类

package com.xun.rabbitmqdemo.utils;

import com.rabbitmq.client.channel;
import com.rabbitmq.client.connection;
import com.rabbitmq.client.connectionfactory;

public class rabbitmqutils {
    public static channel getchannel() throws exception{
        connectionfactory factory = new connectionfactory();
        factory.sethost("localhost");
        factory.setusername("guest");
        factory.setpassword("guest");
        connection connection = factory.newconnection();
        channel channel = connection.createchannel();
        return channel;
    }
}

启动2个工作线程

package com.xun.rabbitmqdemo.workqueue;

import com.rabbitmq.client.cancelcallback;
import com.rabbitmq.client.channel;
import com.rabbitmq.client.delivercallback;
import com.xun.rabbitmqdemo.utils.rabbitmqutils;

public class work01 {
    private static final string queue_name = "hello";
    public static void main(string[] args) throws exception{
        channel channel = rabbitmqutils.getchannel();
        delivercallback delivercallback = (consumertag,delivery)->{
            string receivedmessage = new string(delivery.getbody());
            system.out.println("接收消息:"+receivedmessage);
        };
        cancelcallback cancelcallback = (consumertag)->{
            system.out.println(consumertag+"消费者取消消费接口回调逻辑");
        };
        system.out.println("c1 消费者启动等待消费....");
        /**
         * 消费者消费消息
         * 1、消费哪个队列
         * 2、消费成功后是否自动应答
         * 3、消费的接口回调
         * 4、消费未成功的接口回调
         */
        channel.basicconsume(queue_name,true,delivercallback,cancelcallback);
    }
}

package com.xun.rabbitmqdemo.workqueue;

import com.rabbitmq.client.cancelcallback;
import com.rabbitmq.client.channel;
import com.rabbitmq.client.delivercallback;
import com.xun.rabbitmqdemo.utils.rabbitmqutils;

public class work02 {
    private static final string queue_name = "hello";
    public static void main(string[] args) throws exception{
        channel channel = rabbitmqutils.getchannel();
        delivercallback delivercallback = (consumertag,delivery)->{
            string receivedmessage = new string(delivery.getbody());
            system.out.println("接收消息:"+receivedmessage);
        };
        cancelcallback cancelcallback = (consumertag)->{
            system.out.println(consumertag+"消费者取消消费接口回调逻辑");
        };
        system.out.println("c2 消费者启动等待消费....");
        channel.basicconsume(queue_name,true,delivercallback,cancelcallback);
    }
}

启动工作线程

启动发送线程

package com.xun.rabbitmqdemo.workqueue;

import com.rabbitmq.client.channel;
import com.xun.rabbitmqdemo.utils.rabbitmqutils;
import java.util.scanner;

public class task01 {
    private static final string queue_name = "hello";
    public static void main(string[] args) throws exception{
        try(channel channel= rabbitmqutils.getchannel();){
            channel.queuedeclare(queue_name,false,false,false,null);
            //从控制台接收消息
            scanner scanner = new scanner(system.in);
            while(scanner.hasnext()){
                string message = scanner.next();
                channel.basicpublish("",queue_name,null,message.getbytes());
                system.out.println("发送消息完成:"+message);
            }
        }
    }
}

启动发送线程，此时发送线程等待键盘输入

发送4个消息

可以看到2个工作线程按照顺序分别接收message。

消息应答机制

rabbitmq将message发送给消费者后，就会将该消息标记为删除。

但消费者在处理message过程中宕机，会导致消息的丢失。

因此需要设置手动应答。

生产者

import com.xun.rabbitmqdemo.utils.rabbitmqutils;
import java.util.scanner;

public class task02 {
    private static final string task_queue_name = "ack_queue";
    public static void main(string[] args) throws exception{
        try(channel channel = rabbitmqutils.getchannel()){
            channel.queuedeclare(task_queue_name,false,false,false,null);
            scanner scanner = new scanner(system.in);
            system.out.println("请输入信息");
            while(scanner.hasnext()){
                string message = scanner.nextline();
                channel.basicpublish("",task_queue_name,null,message.getbytes());
                system.out.println("生产者task02发出消息"+ message);
            }
        }
    }
}

消费者

package com.xun.rabbitmqdemo.workqueue;
import com.rabbitmq.client.cancelcallback;
import com.rabbitmq.client.channel;
import com.rabbitmq.client.delivercallback;
import com.xun.rabbitmqdemo.utils.rabbitmqutils;
import com.xun.rabbitmqdemo.utils.sleeputils;

public class work03 {
    private static final string ack_queue_name = "ack_queue";
    public static void main(string[] args) throws exception{
        channel channel = rabbitmqutils.getchannel();
        system.out.println("work03 等待接收消息处理时间较短");
        delivercallback delivercallback = (consumertag,delivery)->{
            string message = new string(delivery.getbody());
            sleeputils.sleep(1);
            system.out.println("接收到消息:"+message);
            /**
             * 1、消息的标记tag
             * 2、是否批量应答
             */
            channel.basicack(delivery.getenvelope().getdeliverytag(),false);
        };
        cancelcallback cancelcallback = (consumertag)->{
            system.out.println(consumertag+"消费者取消消费接口回调逻辑");
        };
        //采用手动应答
        boolean autoack = false;
        channel.basicconsume(ack_queue_name,autoack,delivercallback,cancelcallback);
    }
}

package com.xun.rabbitmqdemo.workqueue;
import com.rabbitmq.client.cancelcallback;
import com.rabbitmq.client.channel;
import com.rabbitmq.client.delivercallback;
import com.xun.rabbitmqdemo.utils.rabbitmqutils;
import com.xun.rabbitmqdemo.utils.sleeputils;

public class work04 {
    private static final string ack_queue_name = "ack_queue";
    public static void main(string[] args) throws exception{
        channel channel = rabbitmqutils.getchannel();
        system.out.println("work04 等待接收消息处理时间较长");
        delivercallback delivercallback = (consumertag,delivery)->{
            string message = new string(delivery.getbody());
            sleeputils.sleep(30);
            system.out.println("接收到消息:"+message);
            channel.basicack(delivery.getenvelope().getdeliverytag(),false);
        };
        cancelcallback cancelcallback = (consumertag)->{
            system.out.println(consumertag+"消费者取消消费接口回调逻辑");
        };
        //采用手动应答
        boolean autoack = false;
        channel.basicconsume(ack_queue_name,autoack,delivercallback,cancelcallback);
    }
}

工具类sleeputils

package com.xun.rabbitmqdemo.utils;
public class sleeputils {
    public static void sleep(int second){
        try{
            thread.sleep(1000*second);
        }catch (interruptedexception _ignored){
            thread.currentthread().interrupt();
        }
    }
}

模拟

work04等待30s后发出ack

在work04处理message时手动停止线程，可以看到message:dd被rabbitmq交给了work03

不公平分发

上面的轮询分发，生产者依次向消费者按顺序发送消息，但当消费者a处理速度很快，而消费者b处理速度很慢时，这种分发策略显然是不合理的。
不公平分发：

int prefetchcount = 1;
channel.basicqos(prefetchcount);

通过此配置，当消费者未处理完当前消息，rabbitmq会优先将该message分发给空闲消费者。

总结

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docker启动rabbitmq以及使用方式详解

2024年05月22日 • 云虚拟主机 •我要评论