web.xml.erb

<!DOCTYPE web-app PUBLIC
  "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
  "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<% webxml.context_params.each do |k,v| %>
  <context-param>
    <param-name><%= k %></param-name>
    <param-value><%= v %></param-value>
  </context-param>
<% end %>

  <filter>
    <filter-name>RackFilter</filter-name>
    <filter-class>org.jruby.rack.RackFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>RackFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <listener>
    <listener-class><%= webxml.servlet_context_listener %></listener-class>
  </listener>

<% if webxml.jndi then [webxml.jndi].flatten.each do |jndi| %>
  <resource-ref>
    <res-ref-name><%= jndi %></res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
  </resource-ref>
<% end; end %>
</web-app>