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  1. JDK
  2. JDK-6791501

Official API for Swing EDT Exception Handler

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    Details

    • Type: Enhancement
    • Status: Closed
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 7
    • Fix Version/s: None
    • Component/s: client-libs
    • Labels:

      Description

      A DESCRIPTION OF THE REQUEST :
      There shall be an API that is port of the official Swing specification, which allows the set a handler for alle exceptions thrown inside of the EDT, especially runtime exceptions in event handlers and property listeners.

      JUSTIFICATION :
      Currently (6u10) there are two ways to handle these exceptions in a global way, but both do not work:

      (a) Thread.currentThread().setUncaughtExceptionHandler -- this just is doing nothing for the EDT. I tried it out with 6u10 by throwing a RuntimeException in a property change. It has just no effect at all.

      (b) sun.awt.exception.handler -- this is not part of the Swing API and propably will not work on other vendor's JREs; also it might be gone in future.

      Since it is a common problem "How to handle an exception that was thrown in the EDT?" after years of lengthy discussions and half-baked workarounds, there should be a definitive, single, official way to deal with that problem.

      See these discussions:

      http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6727884
      http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4714232

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      There shall be one single, official way that works exactly the same in all versions of all JREs of all vendors.
      ACTUAL -
      (a) Does not work in 6uN

      (b) Possibly does not work in other vendors' JREs.

      ---------- BEGIN SOURCE ----------
              EventQueue.invokeAndWait(new Runnable() {
                  public void run() {
                      Thread.currentThread().setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
                          public void uncaughtException(Thread t, Throwable e) {
                              System.err.println("*****");
                          }
                      });
                  }
              });


                  this.yearSpinner.addPropertyChangeListener("year", new PropertyChangeListener() {
                      public final void propertyChange(final PropertyChangeEvent event) {
                          throw new RuntimeException("FOO BAR !");
                      }
                  });

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      There is no workaround that will work on all JREs of all vendors.

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              Assignee:
              art Artem Ananiev
              Reporter:
              igor Igor Nekrestyanov (Inactive)
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