J2EE, or the Java 2 Platform, Enterprise Edition, is a standard for development of enterprise applications based on reusable components in a multi-tier environment. In addition to the features of the Java 2 Platform, Standard Edition (J2SE), J2EE adds support for Enterprise Java Beans (EJBs), Java Server Pages (JSPs), Servlets, XML and many more. The J2EE architecture is used to bring together existing technologies and enterprise applications in a single, manageable environment.
Derby is a J2EE-conformant component in a distributed J2EE system. As such, it is one part of a larger system that includes, among other things, a JNDI server, a connection pool module, a transaction manager, a resource manager, and user applications. Within this system, Derby can serve as the resource manager.
For more information on J2EE and how to work in this environment, see the J2EE specification available at http://java.sun.com/j2ee/docs.html.
In order to qualify as a resource manager in a J2EE system, J2EE requires these basic areas of support. These three areas of support involve implementation of APIS and are described in "J2EE Compliance: Java Transaction API and javax.sql Extensions" in the Derby Reference Manual.
This chapter describes the Derby classes that implement the APIs and provides some implementation-specific details.