Enterprise JavaBeans, Fourth Edition

Chapter 31. Exercises for Chapter 15

Exercise 15.1: Web Services and EJB 2.1

In this exercise, you will learn how to use JAX-RPC’s client and server-side programming model with EJB 2.1. You will expose a stateless session bean as a web service. You will also investigate how to connect to and invoke on an existing web service from within EJB code. The stateless session bean that is exposed models the TravelAgentEndpoint in Chapter 15 of the EJB book. The supporting code for the rest of this exercise is borrowed from the exercises for Chapter 11 (Workbook 8). This exercise also introduces another stateless session bean that acts as a JAX-RPC client to the TravelAgentEndpoint EJB.

Initialize Your Environment

Perform the following steps:

1. Open a command prompt or shell terminal and change to the ex15_1 directory created by the extraction process.

2. Set the JAVA_HOME and JBOSS_HOME environment variables to point to where your JDK and JBoss 4.0 are installed. Examples:

   Windows:C:\workbook\ex15_1> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex15_1> set JBOSS_HOME=C:\jboss-4.0

   Unix:$ export JAVA_HOME=/usr/local/jdk1.4.2 $ export JBOSS_HOME=/usr/local/jboss-4.0

3. Add ant to your execution path. Ant is the build utility.

   Windows:C:\workbook\ex15_1> set PATH=..\ant\bin;%PATH%

   Unix:$ export PATH=../ant/bin:$PATH

Clean the Database

You need to clean and refresh the database. To do this, first shutdown JBoss if you have it running and then run the ant clean.db.

Build and Deploy Example Programs

JBoss implements ...