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Hibernate Vs EJB 3.0
Author :
Ramaswamy
Date : Thu Apr 10th, 2008
The J2EE field is agog with excitement about a very popular open-source technology , Hibernate , being elevated to the status of JCP standard. Feedback from J2EE programmers in industry says that knowledge of Hibernate is mandatory for all J2EE aspirants. In this short tutorial , the author attempts to trace the reasons for this new trend and to alert us , to the imminent and dramatic changes in the J2EE landscape.
Introduction to Java Persistence API(JPA)
Author :
Raja
Date : Fri Apr 13th, 2007
Java Persistence API (JPA) provides POJO (Plain Old Java Object) standard and object relational mapping (OR mapping) for data persistence among applications. Persistence, which deals with storing and retrieving of application data, can now be programmed with Java Persistence API starting from EJB 3.0 as a result of JSR 220. This API has borrowed many of the concepts and standards from leading persistence frameworks like Toplink (from Oracle) and Hibernate (from JBoss). One of the great benefits of JPA is that it is an independent API and can nicely integrate with J2EE as well as J2SE applications.
EJB 3.0 Timer Services - An Overview
Author :
Raja
Date : Wed Mar 28th, 2007
Starting from EJB 2.1, Timer Services are available for building J2EE Applications that depends on time based services. Time based services are mostly used in scheduling applications. Technically, these scheduling applications are called workflows. A workflow defines a configurable sequence of activities or tasks that will take place at a particular point of time. Before EJB 2.1, one has to manually code for building and deploying time-based workflow systems. But, with the invent of EJB 3.0, thanks to Annotations and Dependency injections, life has become still more easier for creating such applications.
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