Java线程超时实现

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/luyangbin01/article/details/78863551

在实际应用中经常需要使用到多线程，所以jdk自带封装了线程框架ExecutorService。在多线程的世界里启一个线程简直就是很简单很容易的事情，但是由于对线程超时没有很好的控制机制，就会导致线程大批量挂死的情况。那么，问题来了，怎么设置线程超时呢？直接上代码。
1、首先来个线程池封装类

public final class PlatThreadPool {
    private static final Logger log = LoggerFactory.getLogger(PlatThreadPool.class);
    private static final int threadTimeout = 2;
    private static final ExecutorService exc = Executors.newFixedThreadPool(15);
    private static final ExecutorService cleaner = Executors.newFixedThreadPool(15);
    private static BlockingQueue<Future<?>> futures = new LinkedBlockingDeque<>(); 
    public static void submit(Runnable task){
        try {
            futures.put(exc.submit(task));
        } catch (Exception e) {
            log.error(ExceptionUtils.getException(e));
        }
    }
    static{
        new Thread(new Runnable() {
            public void run() {
                while(true){
                    try {
                        final Future<?> f = futures.take();
                        cleaner.execute(new Runnable() {
                            @Override
                            public void run() {
                                try {
                                    f.get(threadTimeout, TimeUnit.SECONDS);
                                } catch (Exception e) {
                                    f.cancel(true);
                                }
                            }
                        });
                    } catch (Exception e) {
                        log.error(ExceptionUtils.getException(e));
                    }                   
                }
            }
        },"PLAT_THREAD_POOL_TIME_OUT_GUARD").start();
    }
}

2、再来个测试类

public class ThreadPoolTest {
    private static final Logger log = LoggerFactory.getLogger(ThreadPoolTest.class);
    public static void main(String ...args){
        for(int i=0;i<10000;i++){
            final String name = "Thread_"+i;
            PlatThreadPool.submit(new Runnable() {
                @Override
                public void run() {
                    long time = System.currentTimeMillis();
                    try {
                        System.out.println(name+" start.");
                        Thread.sleep(60000);
                    } catch (Exception e) {
                        log.error(ExceptionUtils.getException(e));
                    }finally{
                        System.out.println(name+" finished. "+(System.currentTimeMillis()-time));
                    }
                }
            });
        }
    }
}

好啦，干货上完啦，自己看吧，看不懂请留言。