This bug is based on and replaces RFE 4516924 : Request public access to pumpEvents(Conditional) type functionality.

The functionality to do what the submitter needs in RFE 4516924
exists in the push and pop
methods of EventQueue.java. However there is a focus related bug in pop
involving SequencedEvent. Therefore the rfe was closed and this bug
was opened to fix the SequencedEvent bug.

The following changes are proposed to AWT to allow an application to
call pumpEvents in EventQueue.java. They were made to a development
workspace but not putback, so that the attached test program test.java
could be run to test the feasability of adding the pumpEvents method
to EventQueue.java.

------- Conditional.java -------
*** /tmp/sccs.qtaWUS Thu Feb 13 15:56:57 2003
--- Conditional.java Thu Feb 13 15:35:34 2003
***************
*** 15,20 ****
   * @version %I% %G%
   * @author David Mendenhall
   */
! interface Conditional {
      boolean evaluate();
  }
--- 15,20 ----
   * @version %I% %G%
   * @author David Mendenhall
   */
! public interface Conditional {
      boolean evaluate();
  }

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

------- EventQueue.java -------
*** /tmp/sccs.6na4TS Thu Feb 13 15:56:57 2003
--- EventQueue.java Thu Feb 13 15:12:58 2003
***************
*** 848,854 ****
--- 848,858 ----
              }
          }
      }
+
+ protected void pumpEvents(Conditional cond) {
+ dispatchThread.pumpEvents(cond);
      }
+ }

  /**
   * The Queue object holds pointers to the beginning and end of one internal

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

The attached test program test.java gets into a hang because of a problem
with a SequencedEvent on the EventQueue after an EventQueue pop operation.

Here is the stack trace:

$ java test
ok we in actionListener
OK to pop
ok we in actionListener
back from pop
Full thread dump Java HotSpot(TM) Client VM (1.4.2-beta-b15 mixed mode):

"AWT-EventQueue-3" prio=7 tid=0x008cb108 nid=0x558 in Object.wait() [1ac2f000..
ac2fd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10090bb0> (a test$PopQueue)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:334)
        - locked <0x10090bb0> (a test$PopQueue)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:167)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:103)

"2'nd" prio=7 tid=0x18449288 nid=0x564 in Object.wait() [1abef000..1abefd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10510320> (a java.awt.Component$AWTTreeLock)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.Dialog.show(Dialog.java:570)
        - locked <0x10510320> (a java.awt.Component$AWTTreeLock)
        at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:840)
        at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:642)
        at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:613)
        at test.run(test.java:107)
        at java.lang.Thread.run(Thread.java:534)

"AWT-EventQueue-2" prio=7 tid=0x183f4560 nid=0x53c in Object.wait() [1abaf000..
abafd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10090b18> (a test$PopQueue)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:334)
        - locked <0x10090b18> (a test$PopQueue)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:167)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:103)

"AWT-EventQueue-1" prio=7 tid=0x18448450 nid=0x610 in Object.wait() [1ab6f000..
ab6fd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10090bb0> (a test$PopQueue)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:334)
        - locked <0x10090bb0> (a test$PopQueue)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:167)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventQueue.pumpEvents(EventQueue.java:853)
        at test$PopQueue.pumpEvents(test.java:125)
        at test.actionPerformed(test.java:60)
        at java.awt.Button.processActionEvent(Button.java:382)
        at java.awt.Button.processEvent(Button.java:350)
        at java.awt.Component.dispatchEventImpl(Component.java:3615)
        at java.awt.Component.dispatchEvent(Component.java:3477)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:451)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:206)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:103)

"AWT-EventQueue-2" prio=7 tid=0x1844a6d0 nid=0x5c4 in Object.wait() [1ab2f000..
ab2fd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10090b18> (a test$PopQueue)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:334)
        - locked <0x10090b18> (a test$PopQueue)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:167)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:103)

"AWT-EventQueue-0" prio=7 tid=0x1843f068 nid=0x54c in Object.wait() [1aadf000..
aadfd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x104fbf80> (a java.awt.EventQueue)
        at java.lang.Object.wait(Object.java:429)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:366)
        - locked <0x104fbf80> (a java.awt.EventQueue)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:167)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.SequencedEvent.dispatch(SequencedEvent.java:72)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:449)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchT
read.java:206)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThr
ad.java:156)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:150

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:142

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:103)

"DestroyJavaVM" prio=5 tid=0x00234d40 nid=0x508 waiting on condition [0..6fae0]

"Java2D Disposer" daemon prio=10 tid=0x183f63a8 nid=0x5dc in Object.wait() [1a8
f000..1a8cfd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x10090ef0> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x10090ef0> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at sun.java2d.Disposer.run(Disposer.java:97)
        at java.lang.Thread.run(Thread.java:534)

"AWT-Windows" daemon prio=7 tid=0x183f1a20 nid=0x570 runnable [1a84f000..1a84fd
0]
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(WToolkit.java:262)
        at java.lang.Thread.run(Thread.java:534)

"AWT-Shutdown" prio=5 tid=0x008ff008 nid=0x4d0 in Object.wait() [1a80f000..1a80
d90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1050e948> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:429)
        at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x1050e948> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:534)

"Signal Dispatcher" daemon prio=10 tid=0x00803e98 nid=0x554 waiting on conditio
 [0..0]

"Finalizer" daemon prio=9 tid=0x00801118 nid=0x62c in Object.wait() [1816f000..
816fd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1050ea48> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x1050ea48> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=10 tid=0x00844c78 nid=0x4a0 in Object.wait() [1
12f000..1812fd90]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1050e7e8> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:429)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:113)
        - locked <0x1050e7e8> (a java.lang.ref.Reference$Lock)

"VM Thread" prio=5 tid=0x00843ac8 nid=0x458 runnable

"VM Periodic Task Thread" prio=10 tid=0x008068e0 nid=0x390 waiting on condition

"Suspend Checker Thread" prio=10 tid=0x008034c0 nid=0x3b8 runnable
###@###.### 10/5/04 08:46 GMT