Hi Vincent, You encountered the bug with filter that was just fixed in the latest snapshot. Please try it. Also, I'll modify the default StatusFilter to also catch Throwable and think about a way to let you plug a custom StatusFilter.
Best regards, Jerome > -----Message d'origine----- > De : news [mailto:[EMAIL PROTECTED] De la part de Vincent > Envoyé : vendredi 27 octobre 2006 20:03 > À : discuss@restlet.tigris.org > Objet : Filter questions > > Hi everybody, > > The (rather long) discussion I had on htis forum with some of > you convinced me > to give restlet a try and see if it'd be a good fit for our > next project. > I've been playing with the framework for a few days now and I > hit my first snag. > > Here it goes: > > My initial configuration is: > > (filter1) ------- <router> ----- [handler1] > | > |---------- [handler2] > > > Now, when a handler throws an Error, it is not caught because > StatusFilter.doHandle only catches Exceptions. > The second problem is that the call to the error-throwing > handler never returns. > > > So I decided to add a second filter, that has pretty much the > same behavior as > Status Filter, except that it catches Throwable. > Here is the new configuration (see below for the code): > > > (filter1) ------- (filter2) ------- <router> ----- [handler1] > | > |---------- [handler2] > > But much to my surprise, filter2.doHandle is never executed (although > filter2.beforeHandle gets executed). > > > So, here are my questions: > > 1- how come filter2.doHandle is not executed? > Does it have something to do with scorers and the fact > that filter2 does not > score high enough? > I must admit I don't get this scoring thing. If somebody > could shed some > light, that'd be great. > > 2- How do I subclass StatusFilter to change its behaviour? > I.e how do I make > ApplicationHelper.start instanciate my StatusHelper class? > > > Thanks, > > -Vincent. > > PS: I'm testing with the Simple web server. > > > -------------------------------------------------------------- > -------------------------------- > import org.restlet.*; > import org.restlet.data.*; > > public class Test { > public static void main(String[] args) > { > Container container = new Container(); > container.getServers().add(Protocol.HTTP, 8182); > > Application application = new Application(container) > { > public Restlet createRoot() > { > // first filter > Filter filter1 = new Filter(getContext()){ > public void beforeHandle(Request request, Response > response){ > System.out.println("In filter1.beforeHandle"); > } > }; > > // second filter - chain it to the first filter > Filter filter2 = new Filter(getContext()){ > public void beforeHandle(Request request, Response > response){ > System.out.println("In filter2.beforeHandle");// > This method gets > executed > } > public void dohandle(Request request, Response response){ > try{ > System.out.println("in filter2.doHandle"); // > How come we never > execute this? > super.doHandle(request, response); > } catch(Throwable t){ > t.printStackTrace(); > response.setStatus(Status.SERVER_ERROR_INTERNAL); > } > } > }; > filter1.setNext(filter2); > > // A router with 2 handlers - chain it to the second filter > Router router = new Router(getContext()); > > router.attach("/foo$",new Handler(){ > public void handle(Request request, Response response){ > response.setEntity("handler foo", MediaType.TEXT_PLAIN); > } > }); > > router.attach("/bar$",new Handler(){ > public void handle(Request request, Response response){ > throw new Error("boo!"); > //throw new NullPointerException("boo!"); > } > }); > filter2.setNext(router); > > return filter1; > } > }; > container.getDefaultHost().attach("", application); > try { > container.start(); > } > catch(Exception e){ > e.printStackTrace(); > } > } > } > > >
