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SpringBoot基于Disruptor实现高效的消息队列

2024-02-22 09:04:49 作者：wx59bcc77095d22

Disruptor是一个开源的Java框架,它被设计用于在生产者-消费者问题上获得尽量高的吞吐量和尽量低的延迟,本文主要介绍了SpringBoot基于Disruptor实现高效的消息队列 ,具有一定的参考价值,感兴趣的可以了解一下

一、前言

Disruptor是一个开源的Java框架，它被设计用于在生产者-消费者问题上获得尽量高的吞吐量和尽量低的延迟，从功能上来看Disruptor是实现了队列的功能，而且是一个有界队列。那么它的应用场景自然就是“生产者-消费者”模型的应用场合了。Disruptor 是在内存中以队列的方式去实现的，而且是无锁的。这也是 Disruptor 为什么高效的原因。

二、SpringBoot整合Disruptor

1.添加依赖

<!--Disruptor-->
<dependency>
    <groupId>com.lmax</groupId>
    <artifactId>disruptor</artifactId>
    <version>3.4.4</version>
</dependency>
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>

2.创建消息体实体

package com.example.aopdemo.disruptor;

import lombok.Data;

/**
 * @author qx
 * @date 2024/2/21
 * @des 消息体
 */
@Data
public class MessageModel {

    private String message;

}

3.创建事件工厂类

package com.example.aopdemo.disruptor;

import com.lmax.disruptor.EventFactory;

/**
 * @author qx
 * @date 2024/2/21
 * @des 事件工厂类
 */
public class MessageEventFactory implements EventFactory<MessageModel> {
    @Override
    public MessageModel newInstance() {
        return new MessageModel();
    }
}

4.创建消费者

package com.example.aopdemo.disruptor;

import com.lmax.disruptor.EventHandler;
import lombok.extern.slf4j.Slf4j;

/**
 * @author qx
 * @date 2024/2/21
 * @des 消息消费者
 */
@Slf4j
public class MessageEventHandler implements EventHandler<MessageModel> {
    @Override
    public void onEvent(MessageModel messageModel, long sequence, boolean endOfBatch) {
        log.info("消费者获取消息:{}", messageModel);
    }
}

5.构造BeanManager

package com.example.aopdemo.disruptor;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author qx
 * @date 2024/2/21
 * @des
 */
@Component
public class BeanManager implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        BeanManager.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }

    public static <T> T getBean(Class<T> clazz) {
        return applicationContext.getBean(clazz);
    }
}

6.创建消息管理器

package com.example.aopdemo.disruptor;

import com.lmax.disruptor.BlockingWaitStrategy;
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.dsl.Disruptor;
import com.lmax.disruptor.dsl.ProducerType;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @author qx
 * @date 2024/2/21
 * @des 事件管理器
 */
@Configuration
public class MessageManager {

    @Bean("messageModel")
    public RingBuffer<MessageModel> messageModelRingBuffer() {
        // 定义线程池
        ExecutorService executorService = Executors.newFixedThreadPool(2);

        // 指定事件工厂
        MessageEventFactory factory = new MessageEventFactory();

        // 指定ringbuffer字节大小，必须为2的N次方（能将求模运算转为位运算提高效率），否则将影响效率
        int bufferSize = 1024 * 256;

        //单线程模式，获取额外的性能
        Disruptor<MessageModel> disruptor = new Disruptor<>(factory, bufferSize, executorService, ProducerType.SINGLE, new BlockingWaitStrategy());

        //设置事件业务处理器---消费者
        disruptor.handleEventsWith(new MessageEventHandler());

        //启动disruptor线程
        disruptor.start();

        //获取ringbuffer环，用于接取生产者生产的事件
        return disruptor.getRingBuffer();
    }

}

7.创建生产者

package com.example.aopdemo.disruptor;

import com.lmax.disruptor.RingBuffer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author qx
 * @date 2024/2/21
 * @des 生产者
 */
@Service
@Slf4j
public class DisruptorService {

    @Autowired
    private RingBuffer<MessageModel> messageModelRingBuffer;

    public void sayMessage(String message) {
        // 获取下一个Event槽的下标
        long sequence = messageModelRingBuffer.next();
        try {
            // 填充数据
            MessageModel messageModel = messageModelRingBuffer.get(sequence);
            messageModel.setMessage(message);
            log.info("往消息队列中添加消息:{}", messageModel);
        } catch (Exception e) {
            log.error("failed to add event to messageModelRingBuffer for : e = {},{}", e, e.getMessage());
        } finally {
            //发布Event，激活观察者去消费，将sequence传递给改消费者
            //注意最后的publish方法必须放在finally中以确保必须得到调用；如果某个请求的sequence未被提交将会堵塞后续的发布操作或者其他的producer
            messageModelRingBuffer.publish(sequence);
        }

    }

}

8.创建测试类

package com.example.aopdemo.controller;

import com.example.aopdemo.disruptor.DisruptorService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author qx
 * @date 2024/2/21
 * @des Disruptor测试
 */
@RestController
public class DisruptorController {

    @Autowired
    private DisruptorService disruptorService;

    @GetMapping("/disruptor")
    public String disruptorTest(String message) {
        disruptorService.sayMessage(message);
        return "发送消息成功";
    }
}

9.测试

启动程序，在浏览器访问请求连接进行测试。

我们在控制台上可以获取到消息的发送和接收信息。

2024-02-21 15:22:16.059 INFO 6788 --- [nio-8080-exec-1] c.e.aopdemo.disruptor.DisruptorService : 往消息队列中添加消息:MessageModel(message=hello)
2024-02-21 15:22:16.060 INFO 6788 --- [pool-1-thread-1] c.e.a.disruptor.MessageEventHandler : 消费者获取消息:MessageModel(message=hello)

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