Hi Cheong Hee,

I am using the localEditingContext() method of GenericComponent class which 
internally creates the ERXEC.newEditingContext().

Please advise if this not the component-based ec.

Regards,
Raghu.

On 01-Jun-2012, at 4:35 PM, Cheong Hee (Gmail) wrote:

> Hi Raghu
> 
> May be you really need to look at how the object model design.  Usually, once 
> the invalidate all objects, the ec will fetch again new objects and theirs 
> object graph.  May be some code will be helpful.  Also, pls remember to have 
> component-based ec.
> 
> Cheers
> 
> Cheong Hee
> 
> ----- Original Message ----- From: "Raghavender Bokka" 
> <[email protected]>
> To: "Cheong Hee (Gmail)" <[email protected]>
> Cc: "Development WebObjects" <[email protected]>
> Sent: Friday, June 01, 2012 2:17 PM
> Subject: Re: NullPointerException in EODatabaseContext java
> 
> 
> Hi Cheong Hee,
> 
> I tried invalidating the objects in ec, then we are able to view the details 
> of this eo object, but the other similar objects in the wodisplaygroup list 
> is behaving weirdly when they are selected.
> 
> Regards,
> Raghu.
> 
> On 01-Jun-2012, at 11:41 AM, Cheong Hee (Gmail) wrote:
> 
>> i guessed one quick way is to invalidate the objects in ec and force it to 
>> refetch from db.
>> 
>> ----- Original Message ----- From: "Raghavender Bokka" 
>> <[email protected]>
>> To: "Development WebObjects" <[email protected]>
>> Sent: Thursday, May 31, 2012 9:04 PM
>> Subject: NullPointerException in EODatabaseContext java
>> 
>> 
>>> Hi Team,
>>> 
>>> I have created an enterprise object with one-to-many relationship objects 
>>> associating.  Then in the search page searched for these enterprise objects 
>>> (that has WODisplayGroup), I am able to view the newly created object, but 
>>> when I try to select that object to view the details it is generating the 
>>> following exception.   If I restart the application then I am able to view 
>>> the details of the newly created object without any error, or If we try 
>>> accessing the newly created object after sometime (around half an hour 
>>> later) then without error able to view the object details. Otherwise the 
>>> enterprise object is getting null.
>>> 
>>> This enterprise object's super class has the database table, and this 
>>> object does not has the database table, it points to the same database 
>>> table of the super class.  And the to-many relationship is existing with 
>>> this enterprise object (sub-class), not the super class.
>>> 
>>> Any help would be appreciated.
>>> 
>>> ------------------------EXCEPTION--------------------------------------------------
>>> [2012-5-31 8:25:4 EDT] <WorkerThread7> java.lang.NullPointerException
>>>      at 
>>> com.webobjects.eoaccess.EODatabaseContext.arrayFaultWithSourceGlobalID(EODatabaseContext.java:3510)
>>>      at 
>>> com.webobjects.eoaccess.EODatabaseContext._fireDeferredFaultWithSourceObject(EODatabaseContext.java:2377)
>>>      at 
>>> com.webobjects.eoaccess.EOAccessDeferredFaultHandler.createFaultForDeferredFault(EOAccessDeferredFaultHandler.java:49)
>>>      at 
>>> com.webobjects.eocontrol.EOCustomObject.willReadRelationship(EOCustomObject.java:1279)
>>>      at 
>>> com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer$_LazyGenericRecordBinding.valueInObject(_EOMutableKnownKeyDictionary.java:614)
>>>      at 
>>> com.webobjects.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject.java:1634)
>>>      at _StoredDistrictTest.storedTestItems(_StoredDistrictTest.java:33)
>>>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>      at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>      at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>      at java.lang.reflect.Method.invoke(Method.java:597)
>>>      at 
>>> KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>>      at 
>>> com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>>>      at 
>>> com.webobjects.eocontrol.EOCustomObject.valueForKey(EOCustomObject.java:1498)
>>>      at 
>>> com.webobjects.eocontrol.EOCustomObject.eoDescription(EOCustomObject.java:793)
>>>      at 
>>> com.webobjects.eocontrol.EOCustomObject.toString(EOCustomObject.java:299)
>>>      at java.lang.String.valueOf(String.java:2826)
>>>      at java.lang.StringBuilder.append(StringBuilder.java:115)
>>>      at StoredTestListPage.printTestSession(StoredTestListPage.java:276)
>>>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>      at 
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>      at 
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>      at java.lang.reflect.Method.invoke(Method.java:597)
>>>      at 
>>> KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>>>      at 
>>> com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>>>      at 
>>> com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>>>      at 
>>> com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>>>      at 
>>> com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>>>      at 
>>> com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>>>      at 
>>> com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>>>      at 
>>> com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>>>      at 
>>> com.webobjects.appserver._private.WOHyperlink.invokeAction(WOHyperlink.java:98)
>>>      at 
>>> er.extensions.components._private.ERXHyperlink.invokeAction(ERXHyperlink.java:66)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> er.extensions.components._private.ERXWORepetition.invokeAction(ERXWORepetition.java:496)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> er.extensions.components._private.ERXWOForm.invokeAction(ERXWOForm.java:219)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOComponentContent.invokeAction(WOComponentContent.java:38)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>>>      at 
>>> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>>>      at 
>>> com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:149)
>>>      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 
>>> er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102)
>>>      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 
>>> er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102)
>>>      at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>>>      at Session.invokeAction(Session.java:179)
>>>      at 
>>> com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>>>      at 
>>> er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:93)
>>>      at 
>>> er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1869)
>>>      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 
>>> er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1984)
>>>      at 
>>> er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1949)
>>>      at Application.dispatchRequest(Application.java:742)
>>>      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:619)
>>> -------------------- Regards,
>>> Raghu.
>>> 
>>> 
>>> 
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>> 
>> 
> 
> 
> 

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