ExecuteService学习

Java并发任务执行与错误处理

最新推荐文章于 2023-12-08 16:24:38 发布

原创最新推荐文章于 2023-12-08 16:24:38 发布 · 1.4k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个使用Java ExecutorService执行多个并发任务的例子，并展示了如何通过自定义Runnable类实现任务的成功、失败回调以及异常处理机制。代码中，10个任务被创建并提交到固定大小的线程池，每三个任务会触发除零异常，以此来演示错误处理流程。

private static void executeRunnableTask() throws InterruptedException {
       ExecutorService executorService = Executors.newFixedThreadPool(2);
       IntStream.range(0, 10).boxed().forEach(i->executorService.execute(new MyTask(i) {

           @Override
           protected void error(Throwable e) {
               System.out.println(Thread.currentThread().getName()+" The no:"+i+ " failed, update status to fail");
           }

           @Override
           protected void done() {
               System.out.println(Thread.currentThread().getName()+ " The no:"+i+ " success, update status to success");
           }

           @Override
           protected void doInit() {
               // TODO Auto-generated method stub

           }

           @Override
           protected void doExecute() {
               if(i%3==0) {
                   int temp = i/0;
               }
           }
       }));
//       executorService.shutdown();
//       executorService.awaitTermination(10, TimeUnit.SECONDS);
       System.out.println("=============================");
   }
   private abstract static class MyTask implements Runnable{
       protected final int no;

       public MyTask(int no) {
           super();
           this.no = no;
       }

       @Override
       public void run() {
           try {
               this.doInit();
               this.doExecute();
               this.done();
           }catch (Throwable e) {
               this.error(e);
           }
       }

protected abstract void error(Throwable e);

protected abstract void done();

protected abstract void doExecute();

protected abstract void doInit();
}