Hi all,
I am implementing update conflict handling based on the info here:
http://developer.apple.com/documentation/webobjects/Enterprise_Objects/UpdateStrategies/UpdateStrategies.html
However, it seems that in a JavaClient scenario the update fails
before saveChanges() is ever called on an editing context being saved.
This means that I can't use an overridden saveChanges() in an EC
subclass to catch the adaptor exception caused by the conflict, nor
can I use the context delegate to deal with the exception. So, I am
not sure where to intercept the exception... Or how to deal with
this... Perhaps someone has some experience / an idea about this?
Below is the server side stack trace of the update exception...
TIA,
F
[2009-7-10 17:20:38 GMT-00:04] <WorkerThread10> Server exception:
Optimistic locking failure: The object with global ID
_EOIntegralKeyGlobalID[Company (java.lang.Integer)23] has been changed
by another client
[2009-7-10 17:20:38 GMT-00:04] <WorkerThread10>
java.lang.IllegalStateException: Optimistic locking failure: The
object with global ID _EOIntegralKeyGlobalID[Company
(java.lang.Integer)23] has been changed by another client
at
com
.webobjects
.eodistribution
.EODistributionContext
._throwOptimisticLockingFailureForGlobalIDIfNecessary
(EODistributionContext.java:829)
at
com
.webobjects
.eodistribution
.common
._EOSavingProxy.replacementEOInEditingContext(_EOSavingProxy.java:156)
at
com
.webobjects
.eodistribution
.EODistributionContext
._replacementObjectForDecodedObject(EODistributionContext.java:882)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at
sun
.reflect
.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
com.webobjects.foundation.NSSelector._safeInvokeMethod(NSSelector.java:
122)
at com.webobjects.foundation._NSDelegate._perform(_NSDelegate.java:223)
at com.webobjects.foundation._NSDelegate.perform(_NSDelegate.java:159)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObject(_EOReferenceRecordingCoder.java:619)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObjects(_EOReferenceRecordingCoder.java:649)
at com.webobjects.foundation.NSArray.decodeObject(NSArray.java:1326)
at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
at
sun
.reflect
.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.webobjects.eodistribution.common._EOReferenceRecordingCoder
$_Decoder.decodeObject(_EOReferenceRecordingCoder.java:767)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObject(_EOReferenceRecordingCoder.java:611)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObjects(_EOReferenceRecordingCoder.java:649)
at
com
.webobjects
.eodistribution
.common._EOServerInvocation.decodeObject(_EOServerInvocation.java:66)
at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
at
sun
.reflect
.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.webobjects.eodistribution.common._EOReferenceRecordingCoder
$_Decoder.decodeObject(_EOReferenceRecordingCoder.java:767)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObject(_EOReferenceRecordingCoder.java:611)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObjects(_EOReferenceRecordingCoder.java:649)
at com.webobjects.foundation.NSArray.decodeObject(NSArray.java:1326)
at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
at
sun
.reflect
.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.webobjects.eodistribution.common._EOReferenceRecordingCoder
$_Decoder.decodeObject(_EOReferenceRecordingCoder.java:767)
at
com
.webobjects
.eodistribution
.common
._EOReferenceRecordingCoder
.decodeObject(_EOReferenceRecordingCoder.java:611)
at
com
.webobjects
.eodistribution
.EODistributionContext
.responseToClientMessage(EODistributionContext.java:560)
at
com
.webobjects
.eodistribution
.WOJavaClientComponent.handleClientRequest(WOJavaClientComponent.java:
1148)
at
com
.webobjects
.eodistribution
.WOJavaClientComponent.invokeAction(WOJavaClientComponent.java:445)
at
com
.webobjects
.appserver
._private.WOComponentReference.invokeAction(WOComponentReference.java:
127)
at
com
.webobjects
.appserver
._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
at
com
.webobjects
.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:
1079)
at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
at
com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:
1745)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._handleRequest(WOComponentRequestHandler.java:369)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
.handleRequest(WOComponentRequestHandler.java:442)
at
com
.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:
1687)
at
com
.webobjects
.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
at
com
.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:
226)
at java.lang.Thread.run(Thread.java:613)
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