sprint boot 高并发处理/Callable/DeferredResult

参照详情连接地址：SpringBoot异步实现DeferredResult实战与原理分析 - 掘金 (juejin.cn)，如果需要查看请跳转查阅，本文仅作笔记记录。

案例代码：

返回模型UserModel.java：

package com.namejr.bean;

public class UserModel {
    public Integer userID;
    public String userName;
}

访问接口PublicController.java：

package com.namejr.controller;

import com.namejr.bean.UserModel;
import com.namejr.serviceImpl.PublicServiceImpl;
import org.joda.time.DateTime;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.async.DeferredResult;

import java.util.concurrent.Callable;

@RestController
@RequestMapping(value = "/api/public")
@Validated
public class PublicController {
    @Autowired
    private PublicServiceImpl pServiceImpl;

    @RequestMapping(value = "/getServerTime", method = RequestMethod.GET,produces = "application/json;charset=UTF-8")
    public String getServerTime() {
       return DateTime.now().toString("yyyy-MM-dd HH:mm:ss");
    }

    @RequestMapping(value = "/runCallAble", method = RequestMethod.GET,produces = "application/json;charset=UTF-8")
    public Callable<UserModel> runCallAble() {
       Callable<UserModel> tempUserInfo= () -> {
            try{
                UserModel tempUserInfo1 =new UserModel();
                tempUserInfo1.userID=1;
                tempUserInfo1.userName="namejr";
                Thread.sleep(12000);  // 模拟超时处理
                System.out.println("将会返回结果");
                return tempUserInfo1;
            }catch (Exception err){
                System.out.println("错误："+err.getMessage());
            }
            return null;
        };
       System.out.println("将会挂起/闲置/程序。。。");
       return tempUserInfo;
    }

    @RequestMapping(value = "/runDeferredResult", method = RequestMethod.GET,produces = "application/json;charset=UTF-8")
    public DeferredResult<UserModel> runEventListen() {
       DeferredResult<UserModel> backUserInfo=new DeferredResult<>(13000L,"后台执行超时!!!");
　　　　/**
　　　　backUserInfo.onCompletion(()->{System.out.println("执行完成回调!");});
　　　　*/
       new Thread(()->{
          try{
             UserModel tempUserInfo=new UserModel();
             tempUserInfo.userID=1;
             tempUserInfo.userName="namejr";
             Thread.sleep(12000);  // 模拟超时处理
             System.out.println("将会返回结果");
             // 返回结果的情况两种：1.使用.setResult进行返回处理，2.超时
             backUserInfo.setResult(tempUserInfo);
          }catch (Exception err){
             System.out.println("错误："+err.getMessage());
          }
       }).start();
       System.out.println("将会挂起/闲置/程序。。。");
       return backUserInfo;
    }
}