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Programming WebLogic Enterprise JavaBeans

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Introduction and Roadmap

This section describes the contents and organization of this guide—Programming WebLogic Enterprise Java Beans.


Document Scope and Audience

This document is a resource for software developers who develop applications that include WebLogic Server® Enterprise Java Beans (EJBs). It also contains information that is useful for business analysts and system architects who are evaluating WebLogic Server or considering the use of WebLogic Server EJBs for a particular application.

The topics in this document are relevant during the design and development phases of a software project. The document also includes topics that are useful in solving application problems that are discovered during test and pre-production phases of a project.

This document does not address production phase administration, monitoring, or performance tuning. For links to WebLogic Server documentation and resources for these topics, see Related Documentation.

It is assumed that the reader is familiar with J2EE and EJB concepts. This document emphasizes the value-added features provided by WebLogic Server EJBs and key information about how to use WebLogic Server features and facilities to get an EJB application up and running.


Guide to this Document


Related Documentation

This document contains EJB-specific design and development information.

For comprehensive guidelines for developing, deploying, and monitoring WebLogic Server applications, see the following documents:


Samples and Tutorials for the EJB Developer

In addition to this document, BEA Systems provides a variety of code samples and tutorials for EJB developers. The examples and tutorials illustrate WebLogic Server EJBs in action, and provide practical instructions on how to perform key EJB development tasks.

BEA recommends that you run some or all of the EJB examples before developing your own EJBs.

Avitek Medical Records Application (MedRec) and Tutorials

MedRec is an end-to-end sample J2EE application shipped with WebLogic Server that simulates an independent, centralized medical record management system. The MedRec application provides a framework for patients, doctors, and administrators to manage patient data using a variety of different clients.

MedRec demonstrates WebLogic Server and J2EE features, and highlights BEA-recommended best practices. MedRec is included in the WebLogic Server distribution, and can be accessed from the Start menu on Windows machines. For Linux and other platforms, you can start MedRec from the WL_HOME\samples\domains\medrec directory, where WL_HOME is the top-level installation directory for WebLogic Platform.

MedRec includes a service tier comprised primarily of EJBs that work together to process requests from Web applications, Web services, and workflow applications, and future client applications. The application includes message-driven, stateless session, stateful session, and entity EJBs.

As companion documentation to the MedRec application, BEA provides tutorials that provide step-by-step procedures for key development tasks, including EJB-specific tasks, such as:

EJB Examples in the WebLogic Server Distribution

WebLogic Server 9.0 optionally installs API code examples in WL_HOME\samples\server\examples\src\examples\ejb, where WL_HOME is the top-level directory of your WebLogic Server installation. You can start the examples server, and obtain information about the samples and how to run them from the WebLogic Server 9.0 Start menu.

Additional EJB Examples Available for Download

Additional API examples for download at These examples are distributed as ZIP files that you can unzip into an existing WebLogic Server samples directory structure.

You build and run the downloadable examples in the same manner as you would an installed WebLogic Server example. For more information, see the download pages of individual examples at


New and Changed EJB Features in This Release

For information about new and changed features in WebLogic Server 9.0 see:


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