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Implemeting postMerge events [message #907971]

Tue, 04 September 2012 13:50

Amit B

Messages: 14
Registered: July 2012

Junior Member

Hi,
Getting a crash when trying to implement post merge event. My application defines a custom annotation to maintain a cache on the client side. The application is also implementing a post merge event so that some transient data in each entity can be merge post persist or post merge calls. The event listener class is defines using the annotation @EntityListeners(value = {MyEventListener.class}) for each of the entities. When the application calls getAnnotation() method on the same entity to get the custom annotation the client crashes with the stack trace shown below -

java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy
	at sun.reflect.annotation.AnnotationParser.parseClassArray(Unknown Source)
	at sun.reflect.annotation.AnnotationParser.parseArray(Unknown Source)
	at sun.reflect.annotation.AnnotationParser.parseMemberValue(Unknown Source)
	at sun.reflect.annotation.AnnotationParser.parseAnnotation(Unknown Source)
	at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Unknown Source)
	at sun.reflect.annotation.AnnotationParser.parseAnnotations(Unknown Source)
	at java.lang.Class.initAnnotationsIfNecessary(Unknown Source)
	at java.lang.Class.getAnnotation(Unknown Source)
	at com.easyautomation.feedoffice.FOEDataCache.initializeInternalListeners(FOEDataCache.java:34)
	at com.easyautomation.DataCache.<init>(DataCache.java:20)
	at com.easyautomation.feedoffice.FOEDataCache.<init>(FOEDataCache.java:16)
	at com.easyautomation.feedoffice.ClientDataCache.<init>(ClientDataCache.java:163)
	at com.easyautomation.feedoffice.ClientDataCache.<clinit>(ClientDataCache.java:171)
	at com.easyautomation.feedoffice.forms.FOENumericTextFieldFactory.<init>(FOENumericTextFieldFactory.java:14)
	at com.easyautomation.feedoffice.forms.FOENumericTextFieldFactory.getInstance(FOENumericTextFieldFactory.java:24)
	at com.easyautomation.feedoffice.FOEApplet.displayMenu(FOEApplet.java:282)
	at com.easyautomation.feedoffice.FOEApplet.loginWindowClosed(FOEApplet.java:215)
	at com.easyautomation.feedoffice.forms.AppLogin.submitButtonClicked(AppLogin.java:49)
	at com.easyautomation.feedoffice.forms.AppLogin.performSubmitAction(AppLogin.java:106)
	at com.easyautomation.forms.TitledInternalFrame$2.actionPerformed(TitledInternalFrame.java:88)
	at javax.swing.SwingUtilities.notifyAction(Unknown Source)
	at javax.swing.JComponent.processKeyBinding(Unknown Source)
	at javax.swing.JComponent.processKeyBindings(Unknown Source)
	at javax.swing.JComponent.processKeyEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

Note that this crash only happens when I define the @EntityListeners. If I comment this out everything works fine. It looks an issue with reflection. Is their any other jar file besides eclipselink and jpa 2.0 that needs to be included to implement postmerge events ?. Any help is appreciated.

Thanks

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Re: Implemeting postMerge events [message #909043 is a reply to message #907971]

Thu, 06 September 2012 13:01

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

It sounds like you are missing the persistence.jar or eclipselink.jar from your client's classpath.

James : Wiki : Book : Blog : Twitter

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Re: Implemeting postMerge events [message #909639 is a reply to message #909043]

Fri, 07 September 2012 13:14

Amit B

Messages: 14
Registered: July 2012

Junior Member

James Thanks. I tried adding the jar files to my CLASSPATH but didn't help. The strange thing is that, the problem does not happen when I run the client through the debugger. Only happens outside the debugger. Also, there are other annotations like @Entity, @Table, @NamedQueries that have had no issues with the custom annotation @MMyCacheUpdate. Only after I add the @EntityListeners(value = {MyEventListener.class}) the crash happens. What can be different about @EntityListner that only that does not work while all others do.

Thanks.

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Re: Implemeting postMerge events [message #915672 is a reply to message #907971]

Mon, 17 September 2012 18:18

Amit B

Messages: 14
Registered: July 2012

Junior Member

Still haven't found a solution for this issue.

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Re: Implemeting postMerge events [message #915724 is a reply to message #915672]

Mon, 17 September 2012 21:08

Chris Delahunt

Messages: 1389
Registered: July 2009

Senior Member

Try checking the classloader within FOEDataCache.initializeInternalListeners and see if you can load the classes involved directly - both the MyEventListener and the EntityListeners annotation.

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Re: Implemeting postMerge events [message #939163 is a reply to message #915724]

Wed, 10 October 2012 13:36

Amit B

Messages: 14
Registered: July 2012

Junior Member

Could not get the EntityListeners annotation to work. However in-case someone has the same issue, I worked around the problem and did a postMerge. The other solution that worked is to detach the entity by using detach or try the entitymanager clear method, and then for a find and refresh of entity from the table. In-case shared cache is turned on you may also need to evict(). Thanks.

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