Skip to main content

By clicking Submit, you agree to the developerWorks terms of use.

The first time you sign into developerWorks, a profile is created for you. Select information in your developerWorks profile is displayed to the public, but you may edit the information at any time. Your first name, last name (unless you choose to hide them), and display name will accompany the content that you post.

All information submitted is secure.

  • Close [x]

The first time you sign in to developerWorks, a profile is created for you, so you need to choose a display name. Your display name accompanies the content you post on developerworks.

Please choose a display name between 3-31 characters. Your display name must be unique in the developerWorks community and should not be your email address for privacy reasons.

By clicking Submit, you agree to the developerWorks terms of use.

All information submitted is secure.

  • Close [x]

Select a language:

  • Close [x]
  • Close [x]

Geronimo Beans and the EJB Query Language

Murali Vivekanandan (akvmurlai@gmail.com), Java Developer, Freelance
Murali Vivekanandan graduated with a master's degree in computer applications from the University of Pune and is currently helping a stealth-mode startup build its next-generation J2EE/Java EE product. In the past, he has worked as a J2EE architect and developer for Charles Schwab and Cisco Systems.

Summary:  Enterprise Java™Beans (EJB) are the building blocks of Java Platform, Enterprise Edition (Java EE) applications, and the EJB Query Language (EJB QL) allows you to write queries without any knowledge of the relational schema governing the entity beans. This tutorial explains core concepts of the EJB QL with the help of an example Web application using an entity bean that you'll deploy on the Apache Geronimo application server.

Date:  16 Jan 2007
Level:  Intermediate
PDF:  A4 and Letter (175 KB | 33 pages)Get Adobe® Reader®

Activity:  5038 views
Comments:  

Before you start

This tutorial is for EJB developers who want to leverage the power of declarative persistence using Geronimo Beans and EJB QL.

About this tutorial

This tutorial gets you up to speed using the EJB QL on the Apache Geronimo application server. To illustrate how to do this, you'll develop a simple yellow pages application that has entities with one-to-one, one-to-many, and many-to-many types of relationships. You'll set up the entity relationships in the EJB layer and use the EJB QL to query your entity model. In this tutorial you'll also implement finder methods, a key feature of the EJB QL, that retrieve entity bean instances through the database. Plus you'll learn basic Struts programming for the user interface (UI).

Prerequisites

You should have a high degree of familiarity with JavaServer Pages (JSP) and EJB.

System requirements

The following applications and tools are specifically used to run the code samples in this tutorial:

  • Apache Geronimo application server -- Download the Geronimo 1.1 binary distribution, (either the Tomcat or Jetty version will work). Extract the Geronimo 1.1 server binary release into the directory of your choice.
  • Database -- This tutorial uses Apache Derby, which is open source and lightweight and is embedded with Geronimo, so no separate download is required.
  • Java platform -- Download Java 2 Platform, Standard Edition (J2SE) 1.5 from Sun Microsystems.

1 of 10 | Next

Comments

Back to top

Close [x]

Help: Update or add to My dW interests

What's this?

This little timesaver lets you update your My developerWorks profile with just one click! The general subject of this content (AIX and UNIX, Information Management, Lotus, Rational, Tivoli, WebSphere, Java, Linux, Open source, SOA and Web services, Web development, or XML) will be added to the interests section of your profile, if it's not there already. You only need to be logged in to My developerWorks.

And what's the point of adding your interests to your profile? That's how you find other users with the same interests as yours, and see what they're reading and contributing to the community. Your interests also help us recommend relevant developerWorks content to you.

View your My developerWorks profile

Return from help

Close [x]

Help: Remove from My dW interests

What's this?

Removing this interest does not alter your profile, but rather removes this piece of content from a list of all content for which you've indicated interest. In a future enhancement to My developerWorks, you'll be able to see a record of that content.

View your My developerWorks profile

Return from help

static.content.url=http://www.ibm.com/developerworks/js/artrating/
SITE_ID=1
Zone=Open source, Java technology, WebSphere
ArticleID=188598
TutorialTitle=Geronimo Beans and the EJB Query Language
publish-date=01162007
author1-email=akvmurlai@gmail.com
author1-email-cc=

Table of contents

1 of 10 | Next

Next steps from IBM

With the WebSphere Application Server you can benefit from the simplified EJB 3.0 development experience, new persistence model, and interceptors.

Tags

Help
Use the search field to find all types of content in My developerWorks with that tag.

Use the slider bar to see more or fewer tags.

Popular tags shows the top tags for this particular content zone (for example, Java technology, Linux, WebSphere).

My tags shows your tags for this particular content zone (for example, Java technology, Linux, WebSphere).

Use the search field to find all types of content in My developerWorks with that tag. Popular tags shows the top tags for this particular content zone (for example, Java technology, Linux, WebSphere). My tags shows your tags for this particular content zone (for example, Java technology, Linux, WebSphere).

 

Dig deeper into Open source on developerWorks

Try IBM PureSystems. No charge.

IBM PureSystems on a kaleideoscope background

Experience today!

Get started with the cloud-based trial and pattern development kit.

Share this page:

  • Close [x]

Follow developerWorks:

  • Close [x]