• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

JPA optimistic lock problem

 
Greenhorn
Posts: 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi All,

Following is the code i wrote for updating into database using JPA.

package com.iflex.locking;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.LockModeType;
import javax.persistence.Query;

import com.iflex.jpa.Liability;

public class TestLock {

private EntityManager em = null;
private EntityManagerFactory emf = null;

public static void main(String[] args){
TestLock tLock = new TestLock();
tLock.updateLiab();
}

public void updateLiab(){
em = JPAEntityManager.getInstance().getEM();
Liability liab = null ;
Class c;
try {

em.getTransaction().begin();
Query query = em.createNamedQuery ("Liability.findAByLiabid");
query.setParameter ("liabId", "gmsliab");
List results = query.getResultList ();
if(results != null && results.size() > 0)
liab = (Liability)results.get(0);
System.out.println(liab.getLiabNo() + " "+ liab.getLiabName()+" "+liab.getLiabCcy()+" "
+liab.getVersion());

liab.setLiabCcy("ABP");
em.merge(liab);
em.getTransaction().commit();

}
catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

}
}


When i am trying to run above code following exception is coming ---
javax.persistence.RollbackException: javax.persistence.OptimisticLockException: Exception [TOPLINK-5006] (Oracle TopLink Essentials - 2006.8 (Build 060829)): oracle.toplink.essentials.exceptions.OptimisticLockException
Exception Description: The object [com.iflex.jpa.Liability@49cf9f] cannot be updated because it has changed or been deleted since it was last read.
Class> com.iflex.jpa.Liability Primary Key> [713, 0]
at oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.EntityTransactionImpl.commit(EntityTransactionImpl.java:109)
at oracle.toplink.essentials.internal.ejb.cmp3.transaction.EntityTransactionImpl.commit(EntityTransactionImpl.java:45)
at com.iflex.locking.TestLock.updateLiab(TestLock.java:45)
at com.iflex.locking.TestLock.main(TestLock.java:19)
Caused by: javax.persistence.OptimisticLockException: Exception [TOPLINK-5006] (Oracle TopLink Essentials - 2006.8 (Build 060829)): oracle.toplink.essentials.exceptions.OptimisticLockException
Exception Description: The object [com.iflex.jpa.Liability@49cf9f] cannot be updated because it has changed or been deleted since it was last read.
Class> com.iflex.jpa.Liability Primary Key> [713, 0]
at oracle.toplink.essentials.internal.ejb.cmp3.base.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:359)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1112)
at oracle.toplink.essentials.internal.ejb.cmp3.base.RepeatableWriteUnitOfWork.commitRootUnitOfWork(RepeatableWriteUnitOfWork.java:82)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.commitAndResume(UnitOfWorkImpl.java:842)
at oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.EntityTransactionImpl.commit(EntityTransactionImpl.java:90)
... 3 more
Caused by: Exception [TOPLINK-5006] (Oracle TopLink Essentials - 2006.8 (Build 060829)): oracle.toplink.essentials.exceptions.OptimisticLockException
Exception Description: The object [com.iflex.jpa.Liability@49cf9f] cannot be updated because it has changed or been deleted since it was last read.
Class> com.iflex.jpa.Liability Primary Key> [713, 0]
at oracle.toplink.essentials.exceptions.OptimisticLockException.objectChangedSinceLastReadWhenUpdating(OptimisticLockException.java:136)
at oracle.toplink.essentials.descriptors.VersionLockingPolicy.validateUpdate(VersionLockingPolicy.java:711)
at oracle.toplink.essentials.internal.queryframework.DatabaseQueryMechanism.updateObjectForWriteWithChangeSet(DatabaseQueryMechanism.java:1172)
at oracle.toplink.essentials.queryframework.UpdateObjectQuery.executeCommitWithChangeSet(UpdateObjectQuery.java:76)
at oracle.toplink.essentials.internal.queryframework.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:283)
at oracle.toplink.essentials.queryframework.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:67)
at oracle.toplink.essentials.queryframework.DatabaseQuery.execute(DatabaseQuery.java:609)
at oracle.toplink.essentials.queryframework.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:536)
at oracle.toplink.essentials.queryframework.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:123)
at oracle.toplink.essentials.queryframework.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:95)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2218)
at oracle.toplink.essentials.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:937)
at oracle.toplink.essentials.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:894)
at oracle.toplink.essentials.internal.sessions.CommitManager.commitChangedObjectsForClassWithChangeSet(CommitManager.java:294)
at oracle.toplink.essentials.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:180)
at oracle.toplink.essentials.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:2638)
at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1030)
at oracle.toplink.essentials.internal.ejb.cmp3.base.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:357)
... 7 more

Can somebody help me on this ???

 
reply
    Bookmark Topic Watch Topic
  • New Topic