Enterprise JavaBeans, Fourth Edition

Chapter 26. Exercises for Chapter 8

Exercise 8.1: Simple EJB QL Statements

The exercises in this section reveal some of the basic aspects of EJB QL programming and functionality. You’ll explore basic finder methods, ejbSelect methods, and the use of the IN operation in EJB QL queries.

Start Up JBoss

If you already have JBoss running, there is no reason to restart it.

Build and Deploy the Example Programs

Perform the following steps:

1. Open a command prompt or shell terminal and change to the ex08_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\ex08_1> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex08_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.

   Windows:C:\workbook\ex08_1> set PATH=..\ant\bin;%PATH%

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

4. Perform the build by typing ant.

As in the last exercise, you will see titan.jar rebuilt, copied to the JBoss deploy directory, and redeployed by the application server.

Examine the JBoss-Specific Files

This exercise introduces no new features in JBoss-specific files. If you think you need to, review Exercise 6.1 of this workbook to understand the JBoss-specific files in this example.

Initialize the Database

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