public final  void event(Request request,
    Response response,
    CometEvent event) throws IOException, ServletException 
{
        // Ask this Host to process this request
        request.getHost().getPipeline().getFirst().event(request, response, event);
}

Process Comet event.

 public String getInfo() 
{
        return (info);
}

Return descriptive information about this Valve implementation.

 public final  void invoke(Request request,
    Response response) throws IOException, ServletException 
{
        // Select the Host to be used for this Request
        Host host = request.getHost();
        if (host == null) {
            response.sendError
                (HttpServletResponse.SC_BAD_REQUEST,
                 sm.getString("standardEngine.noHost", 
                              request.getServerName()));
            return;
        }
        // Ask this Host to process this request
        host.getPipeline().getFirst().invoke(request, response);
}

Select the appropriate child Host to process this request, based on the requested server name. If no matching Host can be found, return an appropriate HTTP error.