EJB 3.0, Java Persistence API with JBoss and Connect for JDBC
This article provides all the information you need to use the Progress DataDirect JDBC drivers with these Java technologies. Java Platform, Enterprise Edition (Java EE) is the industry standard for developing portable, robust, scalable and secure server-side Java applications. Java EE provides web services, component model, management, and communications APIs that make it the industry standard for implementing enterprise-class service-oriented architecture (SOA) and next-generation web applications.
The Enterprise JavaBeans (EJB) architecture is a component-based architecture for development and deployment of component-based distributed applications. Applications written using Enterprise JavaBeans are scalable, transactional, and multi-user secure. These applications may be written once, and then deployed on any server platform that supports the EJB specification.
The Java Persistence API (JPA) provides a POJO (plain old Java Object) persistence model for object-relational mapping. It contains a full object/relational mapping specification supporting the use of Java language metadata annotations and/or XML descriptors to define the mapping between Java objects and a relational database. It supports a rich, SQL-like query language (which is a significant extension upon EJB Query Language) for both static and dynamic queries. It also supports the use of pluggable persistence providers.
The JPA specification was introduced by Sun as a means to combine the best ideas from many sources in the new persistence API and create a lightweight, easy to use API which is integrated into any Java EE 5 application server.
JPA provides a standardized means for mapping relational data to Java objects, while also handling the way these objects are stored in the database and removing the need to code directly to the JDBC API.
