Java 实现异步请求方式三：Callable+WebAsyncTask方式

深碍√TFBOYSˉ_ 2023-06-25 03:22 36阅读 0赞

### 1、使用java有返回的线程 ###

>     interface Callable<V>

将Callable交给WebAsyncTask管理，可配置超时时间

### 2、代码示例 ###

package com.listen.demo.ctr;
    
    import lombok.extern.slf4j.Slf4j;
    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.WebAsyncTask;
    
    import java.util.concurrent.Callable;
    import java.util.concurrent.TimeUnit;
    
    import static org.springframework.web.bind.annotation.RequestMethod.GET;
    
    /**
     * @author liuxd
     * @version 1.0
     * @date 2019-12-25 11:30
     */
    @Controller
    @RequestMapping("/api")
    @Slf4j
    public class IIIController {
    
        @RequestMapping(value = "/req3", method = GET)
        @ResponseBody
        public WebAsyncTask<String> req3() {
            log.info("主线程名称：" + Thread.currentThread().getName());
    
            Callable<String> data = () -> {
                log.info("新线程名称：" + Thread.currentThread().getName());
                try {
                    TimeUnit.SECONDS.sleep(1);
                } catch (Exception e) {
                    log.error("程序异常");
                    e.printStackTrace();
                }
                return "异步请求返回信息";
            };
    
            WebAsyncTask<String> webAsyncTask = new WebAsyncTask<String>(2000L, data);
            webAsyncTask.onTimeout(new Callable<String>() {
                @Override
                public String call() throws Exception {
                    return "异步请求超时了";
                }
            });
            return webAsyncTask;
        }
    
    }