THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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In this article will help you migrate servlets and JSPs deployed JBoss v4.0.5 to Apache Geronimo v1.1. This article is part of a series of migration articles covering different types of applications migration.
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Servlets and JSPs implementation analysis Anchor
Servlets and JSPs implementations may vary from one application server to another. The purpose of this section is to provide servlets and JSPs specific feature-to-feature comparison between JBoss and Apache Geronimo so you can clearly identify the differences and plan accordingly before migration.
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Feature | JBoss 4.0.5 | Apache Geronimo |
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Deployment descriptor/plan | jboss-web.xml | geronimo-web.xml |
Method of deployment | Copy the package (ear, war, rar or jar) to the deploy folder of the JBoss server <jboss_home>/server/<your_server_name>/deploy | Deployer tool available in server's bin directory |
Web container | Apache Tomcat 5.5 | Jetty and/or Apache Tomcat |
Sample application Anchor application application
The College Fest application handles registration for events at a college festival. This is an extremely simple application that does not use any type of database. The College Fest application has the following four pages:
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The JBoss enviroment Anchor jboss jboss
This section shows you how and where the sample JBoss reference environment was installed so you can map this scenario to your own implementation.
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After extracting the zip file, a college_fest directory is created. Open the config/build.properties file and edit the properties to match your environment as shown in the following example:
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This build script depends on Geronimo v1.1 or later version
In the college_fest directory you can find build.xml which has the build information for the both JBoss and Geronimo version of sample application. For this particular sample application the use the jboss target.
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With this command, Ant will use the targets defined in build.xml file to build the College Fest application for the JBoss server. The following example shows the definitions in build.xml file.
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The war created by the ant build contains a JBoss specific deployment descriptor, the jboss-web.xml file in the WEB-INF directory of the WAR is shown in the following example.
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Deploy the sample application
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The Geronimo enviroment Anchor geronimo geronimo
Download and install Geronimo from the following URL:
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The release notes available there provide clear instructions on system requirements and how to install and start Geronimo. Throughout the rest of this article we will refer to the Geronimo installation directory as <geronimo_home>.
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If you are planning to run JBoss and Geronimo on the same machine consider to change the default service ports on, at least, one of these servers.
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Step-by-step migration Anchor
In order to migrate the College Fest application to Geronimo you need to replace the jboss-web.xml file with a geronimo-web.xml file which is the Geronimo specific descriptor file. The geronimo-web.xml file is located in the WEB-INF directory withing the college_fest directory structure. The Geronimo deployment plan geronimo-web.xml is illustrated in the following example.
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Given that College Fest is a very simple application, the Geronimo deployment plan will also be very simple. Remember that this application does not use any database access nor has security configured. While reading other articles in the JBoss to Geronimo migration series, you will notice how the complexity of the deployment plan increases as the sample applications for the different migration scenarios also grow in complexity.
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Repeat the steps you did when testing the application on the JBoss environment.
Summary Anchor summary summary
This article has shown you how to migrate a simple Servlet and JSPs application, from JBoss to the Apache Geronimo application server. You followed step-by-step instructions to build the application, deploy and run it, and then migrate it to the Geronimo environment.
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