spring mvc服務端怎樣推送 DeferredResult

本篇文章給大家分享的是有關spring mvc服務端怎樣推送 DeferredResult，小編覺得挺實用的，因此分享給大家學習，希望大家閱讀完這篇文章后可以有所收獲，話不多說，跟著小編一起來看看吧。

示例1： 

package com.example.demo.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.async.DeferredResult;

import java.time.LocalDateTime;
import java.util.concurrent.TimeUnit;

@Controller
public class PushController {
    private static final Logger LOGGER = LoggerFactory.getLogger(PushController.class);

    @RequestMapping("/deferre")
    @ResponseBody
    public DeferredResult<String> DeferredCall() {
        LOGGER.info("---請求開始---");
        try {
            return handle();
        } finally {
            LOGGER.info("---請求結束---");
        }
    }


    private DeferredResult<String> handle() {
        DeferredResult<String> deferredResult = new DeferredResult<>();

        new Thread(() -> {
            try {
                TimeUnit.SECONDS.sleep(3);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            LOGGER.info("---填充值---");
            deferredResult.setResult(LocalDateTime.now().toString());

        }).start();

        return deferredResult;
    }

}

示例2：

@RestController
public class PiceaServletContoller {

    @Autowired
    private PiceaService piceaService;

    @RequestMapping("/deferredresult")
    public DeferredResult<String> deferredResult() throws Exception {
        System.out.println("控制層執行線程:" + Thread.currentThread().getName());
        //超時
        DeferredResult<String> deferredResult = new DeferredResult<String>(10*1000L);
        deferredResult.onTimeout(new Runnable() {
            @Override
            public void run() {
                System.out.println("異步線程執行超時");
                deferredResult.setResult("線程執行超時");
            }
        });
        deferredResult.onCompletion(new Runnable() {
            @Override
            public void run() {
                System.out.println("異步執行完畢");
            }
        });
        FIXED_THREAD_POOL.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println("異步執行線程:" + Thread.currentThread().getName());
                try {
                    String str = piceaService.task2();
                    Thread.sleep(1000);
                    deferredResult.setResult("這是【異步】的請求返回: " + str);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        return deferredResult;
    }

    /**
     * 線程池
     */
    public static ExecutorService FIXED_THREAD_POOL = Executors.newFixedThreadPool(10);
}

以上就是spring mvc服務端怎樣推送 DeferredResult，小編相信有部分知識點可能是我們日常工作會見到或用到的。希望你能通過這篇文章學到更多知識。更多詳情敬請關注億速云行業資訊頻道。