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Groups > comp.lang.java.programmer > #18912

Re: Interrupted exception chaining

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On 9/25/2012 3:25 AM, raphfrk@gmail.com wrote:
> Is there a recommended way of "chaining" interrupted exceptions?


I mostly agree with Eric.  You shouldn't suppress interrupts unless you 
must.  If for example you are implementing a Runnable, you can't throw 
InterruptedException but must deal with it somehow.  Then catching an 
interrupted exception is reasonable.

In this case however it's 100% your code and you could throw 
InterruptedException.  That would defeat the purpose of the code you 
show, of course, but then that is also our point: what you are doing is 
rather questionable.

There's no standard pattern for this because it's not done.  I'd say the 
closest we have to to use a finally block to make certain the interrupt 
flag is restored.


/** A questionable method: wait without throwing InterruptedException. */
public void uninterruptableWait(Object c) {
   boolean interrupted = false;
   try {
     synchronized(c) {
       for(;;) {
          try {
              c.wait();
              return;
          } catch(InterruptedExcpetion ex ) {
             interrupted = true;
          }
        }
      }
    } finally {
       if(interrupted == true ) Thread.currentThread().interrupt();
    }
}

> If that interrupt was unexpected, and causes a stack trace, then it
> would be nice if it could include the details from the thrown
> exception.


If you really need the details of the exception but can't throw from 
your local use site, I'd say wrapping the exception in a 
RuntimeExcpetion and throwing that is best.  (Exception don't ever 
throwing RuntimeException; subclass it and throw your specific exception.)

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Interrupted exception chaining raphfrk@gmail.com - 2012-09-25 03:25 -0700
  Re: Interrupted exception chaining Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-25 08:56 -0400
  Re: Interrupted exception chaining markspace <-@.> - 2012-09-25 08:33 -0700
    Re: Interrupted exception chaining Ivan Ryan <ivan.ryan@gmail.com> - 2012-09-25 09:28 -0700
      Re: Interrupted exception chaining Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-25 13:12 -0400
      Re: Interrupted exception chaining markspace <-@.> - 2012-09-25 12:00 -0700
  Re: Interrupted exception chaining Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-09-25 09:22 -0700
    Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 22:26 +0200
      Re: Interrupted exception chaining markspace <-@.> - 2012-09-25 13:37 -0700
        Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 22:47 +0200
          Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 22:53 +0200
            Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 22:53 +0200
          Re: Interrupted exception chaining markspace <-@.> - 2012-09-25 14:08 -0700
            Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:23 +0200
              Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:24 +0200
              Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:32 +0200
            Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:42 +0200
              Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:48 +0200
              Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-25 23:55 +0200
                Re: Interrupted exception chaining markspace <-@.> - 2012-09-25 15:33 -0700
      Re: Interrupted exception chaining Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-25 21:43 -0400
  Re: Interrupted exception chaining Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2012-09-26 01:43 +0200
    Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-26 10:24 +0200
      Re: Interrupted exception chaining Jan Burse <janburse@fastmail.fm> - 2012-09-26 10:32 +0200
        Re: Interrupted exception chaining Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2012-09-26 16:26 +0200

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