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Home » Eclipse Projects » EclipseLink » EntityManagerFactory (Eclipselink RCP) return NullPointerException
icon7.gif  EntityManagerFactory (Eclipselink RCP) return NullPointerException [message #963450] Mon, 29 October 2012 16:46 Go to previous message
Azi Azwady Jamaludin is currently offline Azi Azwady Jamaludin
Messages: 10
Registered: October 2012
Junior Member
Greetings,

I'm developing RCP application integrating Eclipselink JPA. The RCP project named as mamsys-dispose.

I've also creates a separate project for JPA and I've generates the entities using EclipseLink and convert it to Plug-in project. I also put my EntityManagerFactory and models in this project (JPA). I then add it as required plug-in at mamsys-dispose (MANIFEST-MF > Dependencies)

I'm referring to the 'comics' example and note that the example is old and I've made a number of configuration such as using Activator (org.eclipse.persistence.jpa.osgi) as the classloader. The emf (instance) in comics example refers to null but in my development, emf is not referring to null. I put as EntityManagerFactory emf;. Only at createEntityManager, I put:-
if (emf == null)
init();

But I'm still got these stack trace:-

java.version=1.6.0_35
java.vendor=Apple Inc.
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments: -application org.eclipse.mamsys-dispose.application
Command-line arguments: -application org.eclipse.mamsys-dispose.application -data /Users/azwady/eclipseRCPproj/../runtime-org.eclipse.mamsys-dispose.application -dev file:/Users/azwady/eclipseRCPproj/.metadata/.plugins/org.eclipse.pde.core/org.eclipse.mamsys-dispose.application/dev.properties -os macosx -ws cocoa -arch x86_64 -consoleLog

!ENTRY org.eclipse.core.jobs 4 2 2012-10-29 04:59:32.852
!MESSAGE An internal error occurred during: "Init View...".
!STACK 0
java.lang.NullPointerException
at org.eclipse.mamsysdispose.model.connection.MamsysEntityManagerFactory.createEntityManager(MamsysEntityManagerFactory.java:54)
at org.eclipse.mamsysdispose.model.CreateCaseModel.<init>(CreateCaseModel.java:24)
at org.eclipse.mamsysdispose.views.viewparts.NewCaseView$2$1.run(NewCaseView.java:162)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)

What is missing here?.
**BTW, I'm creating this application on my Macbook and using Eclipse RCP Juno SR1.

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