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In part I, a GlassFish server was dedicated to hosting a single RoR application running on a native Ruby interpreter. Starting with changes in build 29, GlassFish v2 is capable of hosting multiple RoR applications along with your other web/ejb applications. All you need to do is make a couple of minor tweaks

Specify the context root associated with the RoR application in the descriptor file and the 'stripRequestURI' initialization paramater along with others specified in part I as illustrated below.

     <servlet>
        <servlet-name>cgi</servlet-name>
        <servlet-class>org.apache.catalina.servlets.CGIServlet</servlet-class>
        ...
        <init-param>
          <-- stripRequestURI parameter value maps to context root -->
          <-- in this case - http://.../ror/${ror-request-URI} -->
          <param-name>stripRequestURI</param-name>
          <param-value>/ror/</param-value>
        <init-param>
        ...
    </servlet>


    <servlet-mapping>
          <servlet-name>cgi</servlet-name>
          <url-pattern>/ror/*</url-pattern>
    </servlet-mapping>

Since Rails auto-generates links, you'll have to make the following change in config/routes.rb

  # Specify the context root as the relative URL for all requests
  ActionController::AbstractRequest.relative_url_root = "/ror"

  # Install the default route as the lowest priority.
  map.connect ':controller/:action/:id'

Rails application will be accessible @ http(s)://.../ror/...
Simply replicate the configuration with the customized value of context root and the 'cgiPathPrefix' initialization parameter pointing to each application's specific 'dispatch.cgi' to host multiple RoR applications !