Exercise 7.3: Cascade Deletes in CMP 2.0
This very short exercise demonstrates the use of the automatic cascade-delete feature of CMP 2.0 containers. It does this with an example Customer bean and some other beans related to it.
Build and Deploy the Example Programs
Perform the following steps:
Open a command prompt or shell terminal and change to the
ex07_3directory created by the extraction process.Set the
JAVA_HOMEandJBOSS_HOMEenvironment variables to point to where your JDK and JBoss 4.0 are installed. Examples:Windows: C:\workbook\ex07_3> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex07_3> set JBOSS_HOME=C:\jboss-4.0Unix: $ export JAVA_HOME=/usr/local/jdk1.4.2 $ export JBOSS_HOME=/usr/local/jboss-4.0Add
antto your execution path.Windows: C:\workbook\ex07_3> set PATH=..\ant\bin;%PATH%Unix: $ export PATH=../ant/bin:$PATHPerform 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
There are no new JBoss configuration files or components in this exercise.
Examine and Run the Client Applications
Client_73
is a simple example to
demonstrate cascade-delete. The example code is pretty
straightforward and needs no explanation.
In order to run Client_73, invoke the Ant task
run.client_73. Remember to set your
JBOSS_HOME and PATH environment
variables. The output should look something like this:
C:\workbook\ex07_3>ant run.client_73 Buildfile: build.xml ...