Re: [rules-users] Drools Flow : Persistence :- Getting Null Pointer Exception in JPAWorkItemManager.java
How are you calling completeWorkItem (could you show me the entire stack
trace)? When you use persistence, you must make sure all (asynchronous)
invocations to the engine go through the session (as that will make sure
the entity manager is created and changes get persisted afterwards). As
a result, if your work item is completed asynchronously, you should
complete it using ksession.getWorkItemManager().completeWorkItem(..)
(and not using the WorkItemManager reference you got during
executeWorkItem(..) as that is for synchronous use only).
Kris
Quoting Pardeep.Ruhil(a)lntinfotech.com:
Hi,
When I try to run a sample test case using drools-persistence.jar it
works
successfully.
But when I try to include the persistence in my OFBiz application, I
am
getting null pointer exception in class JPAWorkItemManager.java.
java.lang.NullPointerException
at
org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(
JPAWorkItemManager.java:85).
Null Pointer is because of getting EntityManager object as NULL. In
the
below line of JPAWorkItemManager.java
EntityManager em = (EntityManager) this.workingMemory
.getEnvironment().get( EnvironmentName.ENTITY_MANAGER );
the em is null.
Because of this I am getting Null Pointer exception when it try to
run the
code
if (workItemInfo == null) {
workItemInfo = em.find(WorkItemInfo.class, id);
}
Can you tell me why I getting NPE when I try to run the jar file in
my
application.
While the code run successfully when I try to run sample test case
for
that.
Please help me to get through the situation.
Thanks & Regards
Pardeep Ruhil
L&T Infotech Ltd
Mumbai
Ph: +919820283884
Larsen & Toubro Infotech Ltd.
www.Lntinfotech.com
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