5 | JPA - ExceptionInInitializerError when creating EntityManager { EntityManagerFactory emf = javax.persistence.Persistence.createEntityManagerFactory("tmpCLMSPU ... static { javax.persistence.EntityManagerFactory emf = javax.persistence.Persistence |
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 | 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 |
5 | Cannot sort descending, when ordering by caluculated float in a method main(String[] args) { EntityManagerFactory emf = Persistence ... ("javaapplication.*"); EntityManagerFactory emf = Persistence |
5 | Mysterious "Attempt to persist a reference to a non managed instance" error.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import ... ) { Enhancer.enhance("failing.*"); EntityManagerFactory emf = Persistence |
5 | use of Singleton into tomcathi all. i would write a class singleton that encapsulate the entitymanagerFACTORY into it.(the entitymanagerFactory IS A property of the only instance of class singleton. (the class singleton is not a Ejb!!!!!!!!!). into tomcat it not possible use ejbs............. i have to manage the concurrency |
5 | Selective merge/cascade of detatched entity-persisted) company. The following code was run: EntityManagerFactory emf = Persistence ... for improvement would be where I'm inserting a new company each time, such as: EntityManagerFactory emf |
4 | Remove not working;drop"; EntityManagerFactory emf = Persistence.createEntityManagerFactory(url |
4 | Issue with orphanRemoval and multiple EntityManagers){ EntityManagerFactory emf = Persistence.createEntityManagerFactory( "objectdb:test.tmp |
4 | problem when primary key value is zero) { EntityManagerFactory emf = Persistence.createEntityManagerFactory |
