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EJB3.0 Stateless Session Beans with Glassfish 3.1.1 (Open Source Edition)

EJB is not difficult. Well, not as much if you do not have a good grasp of Servlet/JSP architecture and great deal of Java web technologies experience.  Almost the same stuff can be seen in the EJB world Рcontainer, container-managed objects, life-cycles, container callback methods, deploy-time descriptors, and etc.

So, if you are pretty familiar with the basics, EJB is easier than you think. EJB2.x or EJB3.x? It does not really matter.

Software applications used

  • Glassfish 3.1.1 – Open Source Edition
  • JDK1.6 update 21
  • Eclipse Ganymede
  • Windows XP

First, download a Glassfish installer from http://glassfish.java.net/, run it, and use default settings during installation. Then, create an Java project in Eclipse and reference the javax.ejb.jar (<GLASSFISH_HOME>/glassfish/module) library.

ejb_eclipse_ws

Eclipse Project

The client

The Remote Interface

The Local Interface

The Stateless Session bean

Then, build the codes in Eclipse and jar them up – including the client. This will make the testing the client easier but we need to specify the Main-Class during the creation of the jar file. Jar command:

glassfish_eclipse_bin_jar

Jar file

The Manifest.txt contains the following (plus a carriage return):

Finally, deploy the jar via GlassFish Server Administration Console.

namesearch_glassfish

Deployed EJB3.0 Session Bean

Now, let us test the client. Copy the jar file to the directory shown in the image just below and use appclient.bat.

glassfish_test_client

Test EJB client using appclient.bat

Karl San Gabriel

Karl San Gabriel

Java and Enterprise Technologies Expert