eclipse « EntityManager « JPA Q&A

1. Referencing a JPA project from an Eclipse Plugin results in "PersistenceException: No Persistence provider for EntityManager"

I am trying to create an Eclipse application that uses JPA for persistence.
I am trying to use EclipseLink as my provider (more specific org.eclipse.persistence.jpa.PersistenceProvider) and Derby as my database.
Currently ...

2. no persistence provider for entitymanager error on table creating from the entity

i'm new with JPA2.0 and I faced the problem creating the tables from the entities. Details: I've created the tables in MySQL and create the project in Eclipse Helios. In the beginning i've ...

3. I keep getting "No Persistence provider for EntityManager" when trying to run JPA tutorial

I am trying to get the tutorial at to work. It has not been so simple. I know this is probably stupid simple for most people but I ...

4. JPA: How create a JPA project with injection in entity manager?

I'm starting with JPA, so I found recently about injection in EntityManager. I'm using Java EE Web Developers (Indigo), GlassFish, I didn't found any good (updated) tutorial about it, please could anyone ...

5. Hibernate: How configure EntityManager in Hibernate?

I create a hibernate project with 'hibernate tools'provide by JBoss to Eclipse. Generated the Entities (POJO's) and then the DAO's. This way for example:

@Table(name = "area", catalog = "project_schema", uniqueConstraints = @UniqueConstraint(columnNames = ...

6. Java persistence entity manager factory returning null

I am using MySql database with JPA. my persistence.xml looks like

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
    xmlns="" xmlns:xsi=""
    <persistence-unit name="citheph">

7. JEE 6 / Glassfish v3 / Eclipse - JPA Entity Manager Issues

There is nothing wrong with your persistence.xml or with your EJB. I think you are not invoking the EJB correctly from your JSF managed bean. Looking at your first posting, I have a feeling you are directly calling the EJB class instead of obtaining an EJB reference via @EJB. So, do something like this in your managed bean: