September 2011
Intermediate to advanced
528 pages
19h 57m
English
Content preview from Oracle WebLogic Server 11g Administration Handbook Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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JPA and TopLink
The Java Persistence API (JPA) is a Java specification for persisting and managing data between Java objects and classes, and a relational database. JPA is part of the EJB 3.0 specification, is intended to replace the EJB 2 CMP entity bean specification, and is a current industry standard for object-relational mapping (ORM). You can choose from open source and commercial JPA implementations, and a Java EE 5 application server such as Oracle WebLogic Server supports the use of JPA.
Unlike the EJB 2 CMP specification, JPA allows you to define object-relational mappings through standard annotations or XML. JPA includes the object-level query language JPQL to allow the querying of objects from a relational database. It also defines ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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