The configuration for an entity manager is bound tothe factory that created it. Whether application or container managed, the factory needs a persistence unit from which to create an entity manager. A persistence unit dictates the settings to connect to the database and the list of entities that can be managed in a persistence context. […]
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This article shows how to configure the persistence of a application, that run into an application server, using J2EE 6 standards like JPA2, JTA and EJB 3.1. The configuration below is valid for JBoss 7 AS and MySQL 5.
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Sometimes can be useful configure DB access using a datasource configured in the application server where software module runs. This can be done connecting to the datasource using JNDI. JNDI really shines when you have to move an application between environments: development to integration to test to production. If you configure each app server to […]
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Spring framework allows to easily configure an Hibernate datasource. When using an ORM framework on its own, you have to configure its resource factory with its API. For Hibernate and JPA, you have to build a session factory and an entity manager factory from the native Hibernate API and JPA. You have no choice but […]
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