J2SE « EntityManager « JPA Q&A

  1. JPA Q&A
  2. EntityManager
  3. J2SE




1. Reusable Hibernate EntityManager (J2SE)    stackoverflow.com

we are developing a J2SE application and we are using Hibernate for our persistence layer. For our database access I created a singleton class that has all the necessary methods to ...

2. How to prevent non-repeatable query results using persistence API in Java SE?    stackoverflow.com

I am using Java SE and learning about the use of a persistence API (toplink-essentials) to manage entities in a Derby DB. Note: this is (distance learning) university work, but it ...

3. JPA 2 - Using the EntityManager in JavaSE - a couple of questions    stackoverflow.com

I have a couple questions regarding using the entity manager in a JavaSE environment. I'm using the repository pattern to perform my CRUD operations on the database. There will be a base ...

4. J2SE JPA sharing Connections with EntityManager    java.net


public void contrivedExample() {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("pu");
EntityManager em;

em = emf.createEntityManager();
em.getTransaction().begin();
Customer cust = em.find(Customer.class, 1);
cust.setName("Bob Eubanks");
Connection c = ????; // What goes here??
PreparedStatement ps = c.prepareStatement("insert into log(msg) values ('inserted a customer')");
ps.executeUpdate();
ps.close();
c.close();
em.getTransaction().commit();
}

5. EntityManager returned as null in Java SE    forum.hibernate.org

Hi, I am getting a null EntityManager in Java SE. Following is my META-INF/persistence.xml. Please help. Code: ...