code: protected DataSource getDataSource( HttpServletRequest request, String key )
      {
          // Return the requested data source instance
          return ( DataSource ) getServletContext().getAttribute( key + getModuleConfig().getPrefix() );
      }
docs: Return the specified data source for the current Struts module.
  
  @param request The servlet request we are processing
  @param key     The key specified in the
  <code>&lt;message-resources&gt;</code> element for the
  requested bundle