IBM manual Deployment procedure for a Java application, 152 DB2 Deployment Guide

Deployment procedure for a Java application

The procedure for deploying a Java application is simple and straightforward. These are the steps involved:

1.Package the application along with the IBM Data Server Driver. Include the Java runtime environment if required.

2.Copy the files to the target environment.

3.Make sure that the path and classpath are set up correctly.

We use an example to discuss the general idea of how to deploy a Java application with the IBM Data Server Driver and the Java runtime environment.

Both the Java runtime environment and the IBM Data Server Driver are files that can simply be copied along with your application. No specific install program is required for any of them. We build a directory structure containing all the files and then package this directory structure in a portable format. This can be a tar file on Linux and UNIX or a zip file on Windows. For demonstration purposes, we use the Windows environment and generate a self-extracting executable.

We use a Java sample application, MigrateExecuter, described in 5.6, “Samples

overview” on page 251 as the application to be deployed. The application is packaged in the Java archive file itso.jar. In the Java environment, we have to

specify where to find the Java runtime environment, and we have to set up the

Java classpath, which tells the Java runtime environment where to find components. We use the command file jmigrate.cmd to do this.

Example 4-2shows the working directory where we assemble our deployment structure.

Example 4-2 Deployment structure for our Java application

26-06-2008	21:34	<DIR>		db2
26-06-2008	21:27	<DIR>		jre1.6.0_05
20-06-2008	08:52		39.784	itso.jar
26-06-2008	21:49		619	jmigrate.cmd

In the DB2 directory, the files from the IBM Data Server Driver are located. These

are db2jcc.jar, db2jcc4.jar, sqlj.zip, and sqlj4.zip. The Java runtime environment is copied to the subdirectory jrel.6.0.0_05. This working directory is then compressed and extended into the self-extractable executable appjava.exe by

using WinZip. Our basic requirement is to copy all our files to a user-selected

directory. The use of WinZip is not required, but is used for convenience. We deploy our application by executing appjava.exe and selecting a target directory

for the installation. We are now ready to test our deployed application. We do this by executing jmigrate.cmd. A few key lines of the command file are listed in Example 4-3.

152DB2 Deployment Guide