Enterprise JavaBeans, Fourth Edition

Exercise 7.2:Entity Relationships in CMP 2.0, Part 2

The example programs in Exercise 7.2 illustrate the remaining four types of entity-bean relationship:

• Many-to-one unidirectional (Cruise-Ship)

• One-to-many bidirectional (Cruise-Reservation)

• Many-to-many bidirectional (Customer-Reservation)

• Many-to-many unidirectional (Cabin-Reservation)

Start Up JBoss

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

Initialize the Database

No database is initialization needed; JBoss will create the needed tables at bean deployment.

Build and Deploy the Example Programs

Perform the following steps:

1. Open a command prompt or shell terminal and change to the ex07_2 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\ex07_2> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex07_2> 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\ex07_2> 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

No new concepts are introduced in the JBoss-specific deployment descriptors.

Examine and Run the Client Applications

This exercise uses six example programs to demonstrate ...