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15

JBOSS AS7 7.1.1 - Entity not persisted and createNamedQuery fire exception

) {   javax.persistence.EntityTransaction et = em.getTransaction();   if ( et.isActive ... () {   withinTransaction("findAllGuests");   javax.persistence.EntityTransaction et = em.getTransaction();   javax
15

Mysterious "Attempt to persist a reference to a non managed instance" error

.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import ... = new Ostrich();       Index d = new Index(o, dEntries);         EntityTransaction tx = em
11

zip file or JAR manifest missing

operation. public class PageTest { protected static EntityTransaction trans = SingleManager.getTrans
11

failure to enforce NOT NULL for java.lang.String

(); EntityTransaction tr = em.getTransaction(); Request r = new Request(); r.setUsername(null
11

"Attempt to lock a non entity object" error

JDO Transaction, and then beginTransaction(), lock(), and rollback() on a JPA EntityTransaction
11

How to delete M2M relationship?

, Timeslot ts) { EntityTransaction transaction = em.getTransaction(); try
11

find() delay

.createEntityManager();   EntityTransaction trans = em.getTransaction();   int iBlock = 3;   //* codes-1
11

Cascading merge() leading to "Attempt to persist a reference to a non managed instance" error

");     EntityManager em = emf.createEntityManager();     EntityTransaction tx = em.getTransaction
11

Method Invocation On All Entities

part: em = emf.createEntityManager(); EntityTransaction trans = em.getTransaction(); trans
11

Query results are not up to date for entities, not primitives

"); EntityManager em2 = emf   .createEntityManager(); EntityTransaction tr = em2   .getTransaction

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ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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