About EntityManagerFactory
Database Connection using JPA
Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction.... following topics: Overview EntityManagerFactory EntityManager ... for every HTTP request. The main role of an EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to interact with ...
Obtaining a JPA Database Connection
Shows how to use Java/JPA to connect to the ObjectDB Object Database.... Reference Page... instance. Obtaining an EntityManagerFactory Obtaining an EntityManager ... of two steps. First we need to obtain an instance of EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to interact with ...
Step 3: Add a Context Listener Class
Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in an Eclipse Web Application.... database, which will be represented by a JPA's EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to interact with ...
Step 3: Add a Context Listener Class
Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in a NetBeans Web Application.... database, which will be represented by a JPA's EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to interact with ...
Shared (L2) Entity Cache
Explains how to set and use the EntityManagerFactory's shared cache (L2 / level 2) in JPA 2.... cache of entity objects, which is managed by the EntityManagerFactory javax.persistence.EntityManagerFactory JPA interface Interface used to interact with ...
Chapter 3 - Using JPA
Explains how to store, retrieve, update and delete entity objects using JPA. This chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: Database Connection using JPA Working with JPA Entity Objects ...
JPA Reference (JavaDoc)
Java/JPA API Reference (based on the JPA 3 JavaDoc)... javax.persistence.Persistence javax.persistence.EntityManagerFactory javax.persistence.EntityManager ...
javax.persistence.EntityManagerFactory
Interface used to interact with the entity manager factory for the persistence unit.(Interface of JPA)
Issues with JDO Casting & Full Qualified Names
hi! See this query and the comments about failures. This is really urgent for us because as you've stated, this is the only workaround for now to proper casting AND map KEY access though it isn't working correctly either.. ... ; import javax. persistence . EntityManagerFactory ; import javax. persistence . Persistence ... String [ ] args ) { EntityManagerFactory emf = Persistence . createEntityManagerFactory ...
ArrayIndexOutOfBoundsException at com.objectdb.o.ALS.c(ALS.java:89)
Hi all, I have created a packet grabber using JNetPcap. It creates a scala actor (java thread) for every packet grabbed which connect to an OpenDB database to add or update relevant entry's. Everything works fine until packets arrive with a time difference in the order of microseconds. Every scala actor opens a connection to the database, does what it needs to do, and then closes the connection. Something like: ... Line 16 in ArpMonitor.scala: val emf : EntityManagerFactory = Persistence . createEntityManagerFactory ... that usually it is more efficient to create a single EntityManagerFactory with multiple EntityManager instances. It is ...
