java 轮询调用分页接口 java轮询机制

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数码精灵abc 2024-08-05 19:39:39

文章标签 java 轮询调用分页接口 rabbitmq System 发送消息 java 文章分类 Java 后端开发

Work轮询模式讲解

1、轮询模式的分发:—个消费者条，按均分配;
2、公平分发︰根据消费者的消费的力进行公平分发，处理快的处理的多，处理慢的处理的少;按劳分配;

producer

package com.tian.rabbitmq.work.lunxun;

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

public class Producer {
    public static void main(String[] args) {

        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.1.150");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("/");
        Connection connection = null;
        Channel channel = null;
        try {
            connection = connectionFactory.newConnection("生产者");

            channel = connection.createChannel();

            for (int i = 0; i <=20; i++) {
                String msg="学相伴："+i;
                channel.basicPublish("","queue1",null,msg.getBytes());
            }

            System.out.println("消息发送成功");
        } catch (Exception ex) {
            ex.printStackTrace();
        }finally {
            if(channel!=null&&channel.isOpen()){
                try {
                    channel.close();
                }catch (Exception ex){
                    ex.printStackTrace();
                }
            }
            if(connection!=null&&connection.isOpen()){
                try {
                    connection.close();
                }catch (Exception ex){
                    ex.printStackTrace();
                }
            }
        }



    }
}

work

package com.tian.rabbitmq.work.lunxun;

import com.rabbitmq.client.*;

import java.io.IOException;

public class Worker {
    public static void main(String[] args) {
        //1:创建连接工程
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost("192.168.1.150");
        connectionFactory.setPort(5672);
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        connectionFactory.setVirtualHost("/");
        Connection connection = null;
        Channel channel = null;
        try {
            //2:创建连接connection
            connection = connectionFactory.newConnection("生产者");

            //3:通过连接获取通道Channel
            channel = connection.createChannel();

            channel=connection.createChannel();

            Channel finalChanel=channel;
           // finalChanel.basicQos(1);
            finalChanel.basicConsume("queue1", true, new DeliverCallback() {
                public void handle(String s, Delivery delivery) throws IOException {
                    try {
                        System.out.println("work1收到消息是" + new String(delivery.getBody(), "UTF-8" ));
                    } catch (Exception ex) {
                        ex.printStackTrace();
                    }
                }
            }, new CancelCallback() {
                public void handle(String s) throws IOException {
                }
            });
            System.out.println("work1开始接收消息");
            System.in.read();
        } catch (Exception ex) {
            ex.printStackTrace();
        }finally {
            //7:关闭连接
            if(channel!=null&&channel.isOpen()){
                try {
                    channel.close();
                }catch (Exception ex){
                    ex.printStackTrace();
                }
            }
            //8:关闭通道
            if(connection!=null&&connection.isOpen()){
                try {
                    connection.close();
                }catch (Exception ex){
                    ex.printStackTrace();
                }
            }
        }



    }
}

work2 同 work1
现象 10个work消费 10个work2消费10个

Work公平分发讲解

producer

package com.tian.rabbitmq.work.fair;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
/**
 * @author: 学相伴-飞哥
 * @description: Producer 简单队列生产者
 * @Date : 2021/3/2
 */
public class Producer {
    public static void main(String[] args) {
        // 1: 创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        // 2: 设置连接属性
        connectionFactory.setHost("192.168.1.150");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        Connection connection = null;
        Channel channel = null;
        try {
            // 3: 从连接工厂中获取连接
            connection = connectionFactory.newConnection("生产者");
            // 4: 从连接中获取通道channel
            channel = connection.createChannel();
            // 6： 准备发送消息的内容
            //===============================end topic模式==================================
            for (int i = 1; i <= 20; i++) {
                //消息的内容
                String msg = "学相伴:" + i;
                // 7: 发送消息给中间件rabbitmq-server
                // @params1: 交换机exchange
                // @params2: 队列名称/routingkey
                // @params3: 属性配置
                // @params4: 发送消息的内容
                channel.basicPublish("", "queue1", null, msg.getBytes());
            }
            System.out.println("消息发送成功!");
        } catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("发送消息出现异常...");
        } finally {
            // 7: 释放连接关闭通道
            if (channel != null && channel.isOpen()) {
                try {
                    channel.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            if (connection != null) {
                try {
                    connection.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        }
    }
}

work1

package com.tian.rabbitmq.work.fair;

import com.rabbitmq.client.*;
import java.io.IOException;
/**
 * @author: 学相伴-飞哥
 * @description: Consumer
 * @Date : 2021/3/2
 */
public class Work1 {
    public static void main(String[] args) {
        // 1: 创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        // 2: 设置连接属性
        connectionFactory.setHost("192.168.1.150");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        Connection connection = null;
        Channel channel = null;
        try {
            // 3: 从连接工厂中获取连接
            connection = connectionFactory.newConnection("消费者-Work1");
            // 4: 从连接中获取通道channel
            channel = connection.createChannel();

            final  Channel finalChannel = channel;
            finalChannel.basicQos(1);
            finalChannel.basicConsume("queue1", false, new DeliverCallback() {
                public void handle(String s, Delivery delivery) throws IOException {
                    try{
                        System.out.println("Work1-收到消息是：" + new String(delivery.getBody(), "UTF-8"));
                        Thread.sleep(2000);
                        finalChannel.basicAck(delivery.getEnvelope().getDeliveryTag(),false);
                    }catch(Exception ex){
                        ex.printStackTrace();
                    }
                }
            }, new CancelCallback() {
                public void handle(String s) throws IOException {
                }
            });
            System.out.println("Work1-开始接受消息");
            System.in.read();
        } catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("发送消息出现异常...");
        } finally {
            // 7: 释放连接关闭通道
            if (channel != null && channel.isOpen()) {
                try {
                    channel.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            if (connection != null && connection.isOpen()) {
                try {
                    connection.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        }
    }
}

work2

package com.tian.rabbitmq.work.fair;
import com.rabbitmq.client.*;
import java.io.IOException;
/**
 * @author: 学相伴-飞哥
 * @description: Consumer
 * @Date : 2021/3/2
 */
public class Work2 {
    public static void main(String[] args) {
        // 1: 创建连接工厂
        ConnectionFactory connectionFactory = new ConnectionFactory();
        // 2: 设置连接属性
        connectionFactory.setHost("192.168.1.150");
        connectionFactory.setPort(5672);
        connectionFactory.setVirtualHost("/");
        connectionFactory.setUsername("admin");
        connectionFactory.setPassword("admin");
        Connection connection = null;
        Channel channel = null;
        try {
            // 3: 从连接工厂中获取连接
            connection = connectionFactory.newConnection("消费者-Work2");
            // 4: 从连接中获取通道channel
            channel = connection.createChannel();
            // 5: 申明队列queue存储消息
            /*
             *  如果队列不存在，则会创建
             *  Rabbitmq不允许创建两个相同的队列名称，否则会报错。
             *
             *  @params1： queue 队列的名称
             *  @params2： durable 队列是否持久化
             *  @params3： exclusive 是否排他，即是否私有的，如果为true,会对当前队列加锁，其他的通道不能访问，并且连接自动关闭
             *  @params4： autoDelete 是否自动删除，当最后一个消费者断开连接之后是否自动删除消息。
             *  @params5： arguments 可以设置队列附加参数，设置队列的有效期，消息的最大长度，队列的消息生命周期等等。
             * */
            // 这里如果queue已经被创建过一次了，可以不需要定义
            //channel.queueDeclare("queue1", false, true, false, null);
            // 同一时刻，服务器只会推送一条消息给消费者
            //channel.basicQos(1);
            // 6： 定义接受消息的回调
           final Channel finalChannel = channel;
            finalChannel.basicQos(1);
            finalChannel.basicConsume("queue1", false, new DeliverCallback() {
                @Override
                public void handle(String s, Delivery delivery) throws IOException {
                    try{
                        System.out.println("Work2-收到消息是：" + new String(delivery.getBody(), "UTF-8"));
                        Thread.sleep(200);
                        finalChannel.basicAck(delivery.getEnvelope().getDeliveryTag(),false);
                    }catch(Exception ex){
                        ex.printStackTrace();
                    }
                }
            }, new CancelCallback() {
                @Override
                public void handle(String s) throws IOException {
                }
            });
            System.out.println("Work2-开始接受消息");
            System.in.read();
        } catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("发送消息出现异常...");
        } finally {
            // 7: 释放连接关闭通道
            if (channel != null && channel.isOpen()) {
                try {
                    channel.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
            if (connection != null && connection.isOpen()) {
                try {
                    connection.close();
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        }
    }
}

先运行work1 work2 在运行producer 现象 work处理的消息比较多

MQ的使用场景

串行执行

java 轮询调用分页接口 java轮询机制_发送消息

代码

public void makeOrder(){
    //1.保存订单
    orderService.saveOrder();
    //2.发送短信服务
    messageService.sendSMS("order");
    //3.发送Email服务
    emailService.sendEmail("order");
    //4.发送App服务
    appService.sendApp("order");
}

并行

java 轮询调用分页接口 java轮询机制_System_02

代码

public void makeOrder(){
    //1:保存订单
    orderService.saveOrder();
    //相关发送
    relationMessage();
}
public void relationMessage(){
    //异步
    theadpool.submit(new Callable<Object>{
        public object call(){
            //发送短信服务
            messageService.sendSMS("order");   
        }
    })
        //异步
        theadpool.submit(new Callable<Object>{
            public object call(){
                //3.发送Email服务
                emailService.sendEmail("order");   
            }
        })
}

异步消息队列

java 轮询调用分页接口 java轮询机制_System_03

代码

public void makeOrder(){
    //1:保存订单
    orderService.saveOrder();
    rabbitTemplate.convertSend("ex","2","消息内容");
}

解耦

java 轮询调用分页接口 java轮询机制_System_04

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java 轮询调用分页接口 java轮询机制

java 轮询调用分页接口 java轮询机制

Work轮询模式讲解

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MQ的使用场景

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