Tapestry: How to redirect deprecated URLs to an error page

Question

I have legacy web application built using apache Tapestry. I have deprecated most of the application's functionality except few pages. I want this application to be running in production, but I want to redirect deprecated pages/URLs to some error page with 404 error code. Where should I configure it? I have web.xml and jboss-web.xml. Do I need to do it in some Tapestry configuration file?

Answer 1

You can contribute a RequestFilter to the RequestHandler service, i.e. in your AppModule:

public void contributeRequestHandler(
              OrderedConfiguration<RequestFilter> configuration)
{
    // Each contribution to an ordered configuration has a name,
    // When necessary, you may set constraints to precisely control
    // the invocation order of the contributed filter within the pipeline.

    configuration.add("DeprecatedURLs", new RequestFilter() {
        @Override
        public boolean service(Request request,
                               Response response,
                               RequestHandler handler) throws IOException
        {
            String path = request.getPath();
            if (isDeprecated(path))
            {
                response.sendError(404, "Not found");
                return;
            }

            return handler.service(request, response);
        }
    }, "before:*");
}

Notice the before:* ordering constraint, it should register this filter as the first in RequestHandler's configuration.