java 线程超时自动释放线程,java线程池阻塞 如何结束运行

1.背景

在多线程中定时调用Frame 获取音视频  当没有设备或资源过低时容易卡死阻塞了线程,后面的定时任务无法执行

2.处理

使用jdk内置的

Future

来定时结束卡死的业务

    /**
     *  uptate_color(MhCameraGz mhCameraGz) 为自定义的业务 
     */
    @Async   //多线程注释
    public void uptate_color(MhCameraGz mhCameraGz) {
        
        ExecutorService pool = Executors.newWorkStealingPool();
        Future future = pool.submit(() -> {

            //业务内容
            Frame frame = null;
            FFmpegFrameGrabber grabber = null;
            String file = "rtsp://xxxx:[email protected]:554/Streaming/Channels/1";
            grabber = FFmpegFrameGrabber.createDefault(file);
            grabber.setOption("rtsp_transport", "tcp");
            grabber.setImageWidth(2688);
            grabber.setImageHeight(1520);
            grabber.start();
            frame = grabber.grabImage();
            //....
            //业务内容end
            return "aaa";
        });
        try {
            //5秒内不执行完就跳出")
            future.get(5, TimeUnit.SECONDS);
        } catch (Exception e) {
            future.cancel(true);
            System.out.println("跳出");
        }
        return;

    }

3.示例

public static void main(String[] args) throws InterruptedException, ExecutionException {
    ExecutorService pool = Executors.newWorkStealingPool();
    Future future = pool.submit(() -> {
        System.out.println("开始执行");
        //容易超时代码块
        TimeUnit.SECONDS.sleep(8);
        //容易超时代码块 end
        System.out.println("执行完毕");
        return "";
    });
    try {
        future.get(6, TimeUnit.SECONDS);
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println("执行超时超时了");
        future.cancel(true);
    }
    //结束超时线程
    System.out.println("结束");
    return;
}