如何在java Web容器中监视/终止长时间运行的线程？

Question

I have a web application that contains a java bean for executing a potentially long-running job. I'd like to find a way that I can identify when a thread has been executing for a very long time and then potentially kill it if necessary.

My application runs in Glassfish 3 so I am on Java 1.6. I am just looking for a solution to a potential problem in the future.

EDIT:

To be clear I am looking for something like a tool or utility to monitor a running web application.

Answer 1

Use an Executor Service.

  ExecutorService executor = Executors.newSingleThreadExecutor();
  Future<String> future = executor.submit(new Runnable(){ ....});//pass your runnable

And then you can wait for a specified time:

  try {
        int timeOut = 5;
        //Waits if necessary for at most the given time for the computation to
        // complete, and then retrieves its result, if available.
         future.get(timeout, TimeUnit.SECONDS)
    } catch (TimeoutException e) {
        System.out.println("TimedOut!");
    }

    executor.shutdownNow();