5 | Entity factory - best practices at the same time? Flying Banana Jiacong Xu Creating multiple EntityManagerFactory instances is thread safe but inefficient. It is more efficient to create one EntityManagerFactory per database |
5 | How to do multithreading with embedded ObjectDBHi, I've tried to implement a counter with ObjectDB, but the following code doesn't work as expected: final EntityManagerFactory emf = Persistence.createEntityManagerFactory("test.odb ... ); final EntityManagerFactory emf = Persistence.createEntityManagerFactory |
5 | Enhancement Check.persistence.Entity; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory ... [] args) { EntityManagerFactory emf = Persistence.createEntityManagerFactory("objectdb:test |
5 | Need help to make this test work and define proper annotations for entities Lists; import javax.persistence.EntityManagerFactory; import javax.persistence.GeneratedValue; import ... { EntityManagerFactory emf; EntityManager em; public void |
5 | remove & persist in same transaction => Attempt to reuse an existing primary key value javax.persistence.EntityManagerFactory; import javax.persistence.FlushModeType; import javax ... { public static void main(String[] args) { EntityManagerFactory emf; emf = Persistence |
5 | Failed to read DB file while online backup is running(); } } and here is the interesting part of JDODatabase: private EntityManagerFactory emf; private EntityManagerFactory getEntityManagerFactory() { if(emf == null) { synchronized (this) { if(emf |
5 | Deadlock, if two threads try to close an entity manager is closing the EntityManagerFactory that owns that EntityManager. Both threads require locks on both the EntityManager and the EntityManagerFactory but in a different order, so that can cause a deadlock |
1 | WeakRef Purge ObjectDb threads not stopping with Tomcat (in application container) with a an EntityManagerFactory scope thread. The new thread exists when the EntityManagerFactory is closed |
1 | Navigation through lazy loading from Detached Objects a semi detached state (in which they are still associated with the EntityManagerFactory and enable lazy ... "); EntityManagerFactory emf = Persistence.createEntityManagerFactory |
1 | huge heap usage one EntityManagerFactory with 105,689 EntityManager instances. This could be caused by creating EntityManager ... one EntityManagerFactory (EMF): support Support thanks, this helps pretty much hgzwicker Hans-Georg Zwicker |
