Re: [jdt-debug-dev] Modification Watchpoint

[Ralf Anklam <ikeman@xxxxxxxxxxxxxxx>]

Hi,

for our project aims I subclassed the internal class  "JavaWatchpoint", 
handled the modification watchpoint event and stored and worked with the 
value to be.
And that works fine.

Now, that I am in this topic I want to implement the fix for bug 24334. 
In which way this should happen?
What is meant with "inspector"? An entry "Inspect new Value" in 
VariablesView below "Inspect" ?
Where should be the "value to be" stored? In Modification Breakpoint 
itselfs?
(That's the way, I did it. I stored currentValue and valueToBe depending 
on thread and JDIObjectValue/ObjectReference.)

I know that are a lot of questions, but I don't want to implement 
something that doesn't fix the bug/enhancement request.

Ralf Anklam


Darin Wright wrote:

>There is an existing enhancement request to provide the 'value to be' for
>watchpoints - once implemented, you will be able to retrieve the new
>value. Technically, you are not supposed to subclass internal classes. If
>you do so, it's at your own risk. It would be better to vote/wait for the
>enhancement request to be implemented, or even better, implement the fix
>and contribute a patch.
>
>see bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=24334 for the
>existing enhancement request.
>
>Darin
>
>
>
>
>Ralf Anklam <ikeman@xxxxxxxxxxxxxxx>
>Sent by: jdt-debug-dev-bounces@xxxxxxxxxxx
>08/11/2005 03:18 PM
>Please respond to
>"Eclipse JDT Debug developers list."
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>To
>jdt-debug-dev@xxxxxxxxxxx
>cc
>
>Subject
>[jdt-debug-dev] Modification Watchpoint
>
>
>
>
>
>
>Hello,
>
>programmatically I create a modification watchpoint on a field and if
>the field is modified, I get noticed.
>I want to readout and store the value of this field. To do this I
>implemented the IDebugEventSetListenerInterface
>and react on suspend events, which are initiated by my watchpoint
>(IJavaBreakpointListener.breakpointHit()).
>If I want to readout the value, I get the old value and not the value,
>which will be set.
>
>The JDI offers a ModificationWatchpointEvent and the opportunity the
>readout the value (ModificationWatchpointEvent.valueToBe())
>Unfortunately this is not an org.eclipse.debug.core.DebugEvent, so I can
>not react in the IDebugEventSetListener.handleDebugEvents().
>
>To react on this Event I would build a subclass of
>org.eclipse.jdt.internal.debug.core.breakpoints.JavaWatchpoint
>and overwrite the method handleEvent() to handle the
>ModificationWatchpointEvent. So I would be able to store the value of my
>field.
>
>Is this procedure the right way? Or is there some smarter solution to
>get the value after modification?
>
>
>Ralf Anklam
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