Exception « EntityManager « JPA Q&A





1. JPA Exception: No Persistence provider for EntityManager named MyJPAApplicationPU    stackoverflow.com

I am newbie with JPA. I'm trying to run some sample code using JPA but I get the following exception:

javax.persistence.PersistenceException: No Persistence provider for EntityManager named MyJPAApplicationPU
I put my exception message ...

2. Hibernate Entitymanager remove elegantly without exception?    stackoverflow.com

Is there a more elegant way of avoiding javax.persistence.EntityNotFoundException when calling EntityManager.remove() on an object that may or may not currently exist in persistent state? I am trying to avoid a ...

3. Exception in example Using Hibernate Entity Manager in 2nd chapter of Java Persistence WithHibernate    coderanch.com

Hi, I am trying out the hello world example in the 2nd chapter (sesction 2.2.2 Using Hibernate Entity Manager)of Manning's Java Persistence with Hibernate book. I have created a simple java project in eclipse called HibernateEntityManager. I have included the following jars in the lib folder. antlr-2.7.6.jar asm-attrs-2.2.jar asm.jar c3p0-0.9.1.1.jar cglib.jar commons-collections-3.1.jar commons-logging-1.1.1.jar dom4j-1.6.1.jar ejb3-persistence.jar hibernate-annotations.jar hibernate-c3p0-3.3.1.GA.jar hibernate-entitymanager-3.3.2.GA.jar hibernate-jpa-2.0-api-1.0.0-CR-1.jar hibernate-tools-3.2.4.GA.jar hibernate3.jar ...

4. EntityManager exceptions and usage    forum.hibernate.org

Newbie Joined: Thu Nov 05, 2009 11:31 am Posts: 8 Hi, I have two applications that are effectively services. In order to conserve CPU I have EntityManagerFactory as a singleton, so it only gets called once. In order to conserve CPU I have an EntityManager created per thread, in an EntityManagerController, in order to not hit the thread safety issue. In ...

5. exception with nested second entity manager    forum.hibernate.org

hi, I have below exception (sorry for the full listing) when my session bean try to persist entity using an entity manager after invocation of another method which uses another entity manager on JBoss 4.2.0.RC2. What is solution for this kind of cases? Here a dummy session bean similar to mine: Code: @Stateless public class MySessionBean implements my MySessionRemote,MySessionLocal { ...