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MDB implementation analysis Anchor analysis
EJB implementations may vary from one vendor to another. The purpose of this section is to provide an EJB specific feature-to-feature comparison between JBoss v4 and Apache Geronimo so you can clearly identify the differences and plan accordingly before migration.
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Sample application Anchor sample
Order processing application has two defined message queues to recieve orders and consignments. Order requests can be generated and sent via the company's web application. When order requests are recieved to the order queue, a MDB will be triggered. It will carry out the next level of order request processing by saving those requests in to a server repository. Those saved order requests will be processed by a company employee later.
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The JBoss enviroment Anchor 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 order_manager directory is created. From now on this directory will be referred as <order_manager_home>. In the <order_manager_home>/config directory open the build.properties file and edit the geronimo.home & xdoclet.home as given in below.
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From a command prompt or shell go to the <order_manager_home> directory and run the ant jboss command. This will create the EAR file and place it directly into the <order_manager_home>/releases/jboss directory.
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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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Download and install Geronimo from the following URL:
http://geronimo.apache.org/downloads.html
Step-by-step migration Anchor migration
Summary Anchor summary summary
The sample application used for this migration exercise, while simple, provides you with detailed instructions on how to migrate an application that uses MDB from JBoss V4.0.5 to Apache Geronimo. The modifications to make this happen were restricted to the xml configuration files with no java code changes necessary.