Enterprise JavaBeans, Fourth Edition

Chapter 22. Exercises for Chapter 4

Exercise 4.1: A Simple Entity Bean

The Cabin EJB demonstrates basic CMP 2.0 capability for a simple entity bean mapped to a single table. The following sections outline the steps necessary to build, deploy, and execute the Cabin EJB example. Please note that because you’re using JBoss’s default embedded database, you don’t need to configure the database or create tables. The code you’ll see here mirrors the example code provided in Chapter 4 of the EJB book.

Start Up JBoss

Start up JBoss as described in the JBoss Installation and Configuration chapter at the beginning of this workbook.

Initialize the Database

The database table for this exercise will automatically be created in JBoss’s default database, HypersonicSQL, when the EJB JAR is deployed.

Build and Deploy the Example Programs

Perform the following steps:

1. Open a command prompt or shell terminal and change to the ex04_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\ex04_1> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex04_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\ex04_1> set PATH=..\ant\bin;%PATH%

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

4. Perform the build by typing ant. Ant uses build.xml to figure out what to compile ...