Getting Started with WebSphere Application Server

Chapter 5 – Enterprise Java Beans 93
car
Listing 5.5 - Defining the configuration id of EJB testejb
As shown in the above listing, this EJB is in group com.ibm.wasce.start with artifact as
testejb. Its version number is 1.0 while its type is car. After deployed in Community
Edition, the EJB will be placed in the following directory.
/repository/com.ibm.wasce.start/testejb/1.0/testejb-1.0.car/
5.2.2.2 Packaging the EJB
Packaging the EJB means that you can bundle the EJB java class and deployment plan
into a JAR package. You can do this by exporting the EJB project in Eclipse or just
packaging the EJB resources with the jar script.
5.2.2.3 Deploying the EJB
To deploy the EJB jar package in Community Edition, use this command:
/bin/deploy.[bat/sh] deploy –username system –password manager
[jarfile]
Note:
In Community Edition, you don’t have to deploy EJBs with a deployment descriptor since
your EJBs include annotations defined in the EJB 3.0 specification.
5.3 Working with EJBs in Community Edition
To make use of EJBs, a client must invoke the EJB interface methods. The client may be a
servlet or an application client.
5.3.1 Using EJBs in a servlet
To make use of EJBs in a servlet you have to:
1. Refer to the EJB in the Servlet
2. Add the EJB to the dependency list of the servlet.
5.3.1.1 Refer to the EJB in the servlet
You can use the annotation @EJB to reference the EJB in a Java class. You can declare a
class field referring to an EJB with this annotation in front of it. Listing 5.6 provides an
example.