Enterprise JavaBeans 3.0, 5th Edition

Chapter WORKBOOK 11. Exercises for Chapter 13

Exercise 13.1: EJB Timer Service

In this exercise, you will learn how to work with the EJB Timer Service. The example in this chapter matches the stateless session bean, ShipMaintenanceBean, that was defined in Chapter 13.

Start Up JBoss

If you already have JBoss running, there is no reason to restart it. Otherwise, start it up as instructed in the Workbook 1.

Initialize the Database

No database is used in this example.

Build and Deploy the Example Programs

Perform the following steps:

1. Open a command prompt or shell terminal and change to the ex13_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\ex13_1> set JAVA_HOME=C:\jdk1.5.0
   C:\workbook\ex13_1> set JBOSS_HOME=C:\wjboss-4.0.x

   Unix:

   $ export JAVA_HOME=/usr/local/jdk1.5.0
   $ export JBOSS_HOME=/usr/local/jboss-4.0

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

   Windows:

   C:\workbook\ex13_1> set PATH=..\ant\bin;%PATH%

   Unix:

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

4. Perform the build by typing ant .

As in the exercises in earlier chapters of this workbook, titan.jar is rebuilt, copied to the JBoss deploy directory, and redeployed by the application server.

Examine ShipMaintenanceBean

com.titan.processpayment.ShipMaintenanceBean is copied as is from Chapter 13, so we won’t go over it here.

Examine the Client

The client is the com.titan.clients.ScheduleMaintenace class:

package ...