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• • Servlet and JSP's code will work equally well with Tomcat and Geronimo. So there are no modifications required on this part.
  • In Tomcat you may have configured security realms in server.xml, also a admin, manager roles can be added using tomcat-users.xml file. In geronimo same can be achieved by adding the following tags <security-realm-name>geronimo-admin</security-realm-name> <sec:security> </sec:security> in geronimo-web.xml(geronimo specific deployment descriptor also known as deployment plan). Users and Groups can be added to the default realm by using the Security => Console Realm menu from the Web console menu.

    Tomcat and Apache Derby

    For Tomcat to work with Apache Derby you have to download Apache Derby and configure environment variables like DERBY_INSTALL. You also need to make sure that the following jars are present in the classpath
    • lib/derby.jar
    • lib/derbytools.jar
    • lib/derbynet.jar
    • lib/derbyclient.jar
      To execute a sql command you have to use ij scipt which comes packaged with Apache Derby.

With regarda to Apache Geronimo there is no need for setting up environment variables or classpath. This is take care of by geronimo. Creating database table and database pool can be easily achieved by using web based Administrative Console. However you have to include a <dependency> </dependency> tag and <resource-ref> </resource-ref> tag in geronimo-web.xml so that the resources are visible to the deployed application.
All the other suggestions made in Tomcat only application is equally vaild in this scenario as well.