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Enterprise JavaBeans, Fourth Edition by Richard Monson-Haefel, Bill Burke, Sacha Labourey

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Exercise 4.2: A Simple Session Bean

In this exercise, you will create and build the TravelAgent EJB. This simple bean illustrates the use of a stateless session bean and mirrors the code shown in Chapter 4 of the EJB section of this book.

Start Up JBoss

If you already have JBoss running, there is no reason to restart it. Otherwise, start it up as instructed in the JBoss Installation and Configuration chapter.

Initialize the Database

The database should contain the 100 rows created by a successful execution of the test programs from the previous exercise, Client_1 and Client_2.

Build and Deploy the Example Programs

Perform the following steps:

  1. Open a command prompt or shell terminal and change to the ex04_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\ex04_2> set JAVA_HOME=C:\jdk1.4.2 C:\workbook\ex04_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. Ant is the build utility.

    Windows: C:\workbook\ex04_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

In this example, the jboss.xml deployment descriptor overrides the default JNDI binding for ...

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