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In the geronimo-web.xml file, application deployer maps the security roles, ejb names, database resources, JMS resources, etc. declared in web.xml to corresponding entities deployed in the server. In addition to that, if there are any web container specific configurations, such as Tomcat or Jetty specific, depending on the application needs, all these settings are configured as well here. If the web application depends on any third party libraries or other services running in the server, all these dependencies are declared in the plan. Some web applications require class loading requirements different from the default class loading hierarchybehavior. The geronimo-web.xml allows application deployer to configure this as well. There are many more configurations that could be done through geronimo-web.xml depending on the needs of web application. The following sections briefly explain how geronimo-web.xml can be used configure the web container and web applications.

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 Please observe the different namespace prefixes and corresponding namespaces used to configure dependencies and resource mapping.

The deployment plan starts with <sys:moduleId> to provide a unique module id configuration for the web application. In dependencies section, using <sys:dependency>, a dependency on "samples/EmployeeDatasource/2.1/rar" is configured. This is the module id of Datasource that connects to DB2. The web context root is configured by <context-root>. Since there is no namespace prefix for this tag, it is going to be the default namespace http://geronimo.apache.org/xml/ns/j2ee/web-2.0.1. The datasource name "jdbc/Datasource" is mapped to "SystemDatasource" using <naming:resource-ref>.

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