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Re: Setting EOEditingContext's Undo Manager to null
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Re: Setting EOEditingContext's Undo Manager to null


  • Subject: Re: Setting EOEditingContext's Undo Manager to null
  • From: Chuck Hill <email@hidden>
  • Date: Mon, 08 Dec 2003 10:32:48 -0800
  • Organization: Global Village Consulting, Inc.

The exception is correct. The implementation of EOEditingContext requires an undo manager to process deletions. You can set the undo manager to null only if you don't need to delete.

You might want to consider creating a special EC with an undo manager just to process the deletion:

EOEditingContext ec = new EOEditingContext();
ec.lock();
try {
    EOEnterpriseObject eo = EOUtilities.localInstanceOfObject(ec,
        eoToDelete);
    ec.delete(eo);
    ec.saveChanges();
}
finally {
    ec.unlock();
    ec.dispose();
}


Chuck


Serge Froment wrote:
Hi,

I have several locally created editing context I use to make some EO manipulations. I used to set the undo manager to null for those editing contextes to avoid the overhead. But now, when I delete EO using such an editing context with WO 5.2.2, I get an exception saying that "Editing context needs an undo manager to recover from delete propagation problems. Do not set the undo manager of this editing context to null". (See full stack trace below)

However, the documentation of EOEditingContext.setUndoManager still says: "Sets the receiver's NSUndoManager to undoManager. You might invoke this method with null if the application doesn't need undo and you want to avoid the overhead of an undo stack.".

Is this a bug or a feature?

Serge Froment
http://www.serge-froment.com


Full stack trace of the exception:

[2003-12-08 11:17:20 EST] <WorkerThread10> <com.webobjects.appserver._private.WOComponentRequestHandler>: Exception occurred while handling request:
java.lang.IllegalStateException: Editing context needs an undo manager to recover from delete propagation problems. Do not set the undo manager of this editing context to null
[2003-12-08 11:17:20 EST] <WorkerThread10> java.lang.IllegalStateException: Editing context needs an undo manager to recover from delete propagation problems. Do not set the undo manager of this editing context to null
at com.webobjects.eocontrol.EOEditingContext._processRecentChanges(EOEditin gContext.java:1694)
at com.webobjects.eocontrol.EOEditingContext.processRecentChanges(EOEditing Context.java:1878)
at com.webobjects.eocontrol.EOEditingContext._processEndOfEventNotification (EOEditingContext.java:2138)
at sun.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.webobjects.foundation.NSSelector.invoke(NSSelector.java:354)
at com.webobjects.foundation.NSSelector._safeInvokeSelector(NSSelector.java :108)
at com.webobjects.foundation.NSDelayedCallbackCenter$NSLightInvocation.invo ke(NSDelayedCallbackCenter.java:242)
at com.webobjects.foundation.NSDelayedCallbackCenter._eventEnded(NSDelayedC allbackCenter.java:208)
at com.webobjects.foundation.NSDelayedCallbackCenter.eventEnded(NSDelayedCa llbackCenter.java:171)
at com.webobjects.appserver.WOApplication.saveSessionForContext(WOApplicati on.java:1522)
at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWit hPreparedApplication(WOComponentRequestHandler.java:329)
at com.webobjects.appserver._private.WOComponentRequestHandler._handleReque st(WOComponentRequestHandler.java:358)
at com.webobjects.appserver._private.WOComponentRequestHandler.handleReques t(WOComponentRequestHandler.java:432)
at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.jav a:1308)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread. java:173)
at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java :254)
at java.lang.Thread.run(Thread.java:554)
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--

Chuck Hill                                 email@hidden
Global Village Consulting Inc.             http://www.global-village.net

Progress is the mother of all problems.
- G. K. Chesterton
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 >Setting EOEditingContext's Undo Manager to null (From: Serge Froment <email@hidden>)

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