spring mvc服务端怎样推送 DeferredResult

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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("---请求开始---");
        try {
            return handle();
        } finally {
            LOGGER.info("---请求结束---");
        }
    }


    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("控制层执行线程:" + Thread.currentThread().getName());
        //超时
        DeferredResult<String> deferredResult = new DeferredResult<String>(10*1000L);
        deferredResult.onTimeout(new Runnable() {
            @Override
            public void run() {
                System.out.println("异步线程执行超时");
                deferredResult.setResult("线程执行超时");
            }
        });
        deferredResult.onCompletion(new Runnable() {
            @Override
            public void run() {
                System.out.println("异步执行完毕");
            }
        });
        FIXED_THREAD_POOL.execute(new Runnable() {
            @Override
            public void run() {
                System.out.println("异步执行线程:" + Thread.currentThread().getName());
                try {
                    String str = piceaService.task2();
                    Thread.sleep(1000);
                    deferredResult.setResult("这是【异步】的请求返回: " + str);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        return deferredResult;
    }

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

以上就是spring mvc服务端怎样推送 DeferredResult，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。