Spring boot 实现高吞吐量异步处理（适用于高并发场景）

 

技术要点

org.springframework.web.context.request.async.DeferredResult

 

示例如下：

1.   新建Maven项目  async

 

2.   pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
        http://maven.apache.org/xsd/maven-4.0.0.xsd">


    <modelVersion>4.0.0modelVersion>
    <groupId>com.javagroupId>
    <artifactId>asyncartifactId>
    <version>1.0.0version>

    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.0.5.RELEASEversion>
    parent>


    <dependencies>

        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>


        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>springloadedartifactId>
            <version>1.2.8.RELEASEversion>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-devtoolsartifactId>
            <scope>providedscope>
        dependency>

    dependencies>

    <build>
        <finalName>${project.artifactId}finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>

            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackagegoal>
                        goals>
                    execution>
                executions>
            plugin>
        plugins>
    build>
project>

 

3.   AsyncStarter.java

package com.java;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class AsyncStarter {

    public static void main(String[] args) {
        SpringApplication.run(AsyncStarter.class, args);
    }

}

 

4.   AsyncVo.java

package com.java.vo;

import org.springframework.web.context.request.async.DeferredResult;

/**
 * 存储异步处理信息
 * 
 * @author Logen
 *
 * @param  接口输入参数
 * @param  接口返回参数
 */
public class AsyncVo {

    /**
     * 请求参数
     */
    private I params;

    /**
     * 响应结果
     */
    private DeferredResult result;

    public I getParams() {
        return params;
    }

    public void setParams(I params) {
        this.params = params;
    }

    public DeferredResult getResult() {
        return result;
    }

    public void setResult(DeferredResult result) {
        this.result = result;
    }

}

 

5.   RequestQueue.java

package com.java.queue;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;

import org.springframework.stereotype.Component;

import com.java.vo.AsyncVo;

/**
 * 存放所有异步处理接口请求队列的对象,一个接口对应一个队列
 * 
 * @author Logen
 *
 */
@Component
public class RequestQueue {

    /**
     * 处理下订单接口的队列，设置缓冲容量为50
     */
    private BlockingQueue> orderQueue = new LinkedBlockingQueue<>(50);

    public BlockingQueue> getOrderQueue() {
        return orderQueue;
    }

}

 

6.   OrderTask.java

package com.java.task;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.java.queue.RequestQueue;
import com.java.vo.AsyncVo;

/**
 * 处理订单接口的任务，每个任务类处理一种接口
 * 
 * @author Logen
 *
 */
@Component
public class OrderTask extends Thread {

    @Autowired
    private RequestQueue queue;

    private boolean running = true;

    @Override
    public void run() {
        while (running) {
            try {
                AsyncVo vo = queue.getOrderQueue().take();
                System.out.println("[ OrderTask ]开始处理订单");

                String params = vo.getParams();
                Thread.sleep(3000);
                Map map = new HashMap<>();
                map.put("params", params);
                map.put("time", System.currentTimeMillis());

                vo.getResult().setResult(map);

                System.out.println("[ OrderTask ]订单处理完成");
            } catch (InterruptedException e) {
                e.printStackTrace();
                running = false;
            }

        }
    }

    public void setRunning(boolean running) {
        this.running = running;
    }

}

 

7.   QueueListener.java

package com.java.listener;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.java.task.OrderTask;

/**
 * 队列监听器，初始化启动所有监听任务
 * 
 * @author Logen
 *
 */
@Component
public class QueueListener {

    @Autowired
    private OrderTask orderTask;

    /**
     * 初始化时启动监听请求队列
     */
    @PostConstruct
    public void init() {
        orderTask.start();
    }

    /**
     * 销毁容器时停止监听任务
     */
    @PreDestroy
    public void destory() {
        orderTask.setRunning(false);
    }

}

 

8.   OrderController.java

package com.java.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.async.DeferredResult;

import com.java.queue.RequestQueue;
import com.java.vo.AsyncVo;

/**
 * 

 * 
 * 
 * 
 * 模拟下单处理，实现高吞吐量异步处理请求
 * 
 * 1、 Controller层接口只接收请求，不进行处理，而是把请求信息放入到对应该接口的请求队列中
 * 2、 该接口对应的任务类监听对应接口的请求队列，从队列中顺序取出请求信息并进行处理
 * 
 * 优点：接口几乎在收到请求的同时就已经返回，处理程序在后台异步进行处理，大大提高吞吐量
 * 
 * 
 * 
 * 
 * 
 * 
 * @author Logen
 *
 */
@RestController
public class OrderController {

    @Autowired
    private RequestQueue queue;

    @GetMapping("/order")
    public DeferredResult