Writing Portable JPA Applications
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About "Writing Portable JPA Applications" topic:
Even though proprietary mapping products like Hibernate and TopLink still exist, they are now focused on providing their functionality through the JPA API, allowing all applications to be portable across JPA implementations. This refcard will give users enough to understand the basics of JPA and get started writing JPA applications. JPA applications covers entities, identifiers, O-R mappings, using an entity manager, creating and executing queries, and configuration of the persistence.xml file. Do share your views on this topic.
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hello folks I know, I was out of the date for a long time and may will be, because I'm really busy okay it doesn't matter I'm still playing with JPA and today we want talk about OpenJPA okay, OpenJPA is a JPA provider, and if we want use it we should know about something at the first lets talk about difference 1: Persistence.xml look at this persist configuration file ?xml version='1.0' encoding='UTF-8'? persistence version='1.0' xmlns='http://java.sun.com/xml/ns/persistence' persistence-unit name='JPA' transaction-type='RESOURCE_LOCAL' provider org.apache.openjpa.persistence.PersistenceProviderImpl /provider !--[0]-- class _PBeans.authors /class !--[1]-- class _PBeans.books /class class _P...
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