ScheduledExecutorService and failures
I am using the method <tt>ScheduledExecutorService.scheduleAtFixedRate</tt> to schedule a periodic task that I want to start and, essentially, forget. I expect this task to run until I stop it or shutdown the executor.
I have discovered the hard way that, if the Runnable I submitted experiences an exception, the executor will silently note the exception in the Future it provided at the time of scheduling and not execute the task again.
The above behavior seems reasonable. My problem with it is that I <b>need</b> that task to continue running. Yet, short of starting another periodic task to check on the first task, I see no easy way to detect that the task has failed and is no longer running. There is no way to listen for such failures that I can see.
What is the preferred way to handle errors in periodic tasks executed by an implementation of ScheduledExecutorService? The only solution I can see involves some non-trivial logic in the Runnable submitted that will detect errors and perform notifications. I'm hoping the concurrent APIs themselves can help me out! Any ideas?
-Bill
