Mike Keith

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The EJB 3.0 Java Persistence API (JPA) was released in May 2006 as part of the Java Enterprise Edition 5 (Java EE) platform, and it has already garnered a great deal of attention and praise. What began as merely an easier-to-use successor to the much-maligned container-managed persistence (CMP) portion of the EJB component standard soon evolved into a full-blown incorporation of the existing best practices of the most prominent and popular object-relational (O-R) persistence products in use. The result is that applications now have a modern standard for lightweight enterprise Java persistence that they can use in any compliant Java EE 5 application server, or in Java Standard Edition (SE) applications. The Spring application framework has been in existence for four years, and it has become a popular choice both in an application server context and standalone. Like ... (more)

Portable Persistence Using the EJB 3.0 Java Persistence API

Experience has taught us that it's not enough to simply have a persistence standard as part of an enterprise specification. It must be a standard that can solve people's problems and be useful to most of the applications that want to use it. While earlier versions of Enterprise JavaBeans (EJB) persistence met some of the needs, they were primarily focused on the distributed problem domain. It is now known, and has been proven by successful commercial products like Oracle TopLink and Open Source projects like JBoss Hibernate, that the objects to be persisted don't have to be any... (more)