Thanks Martin for the info.
A note in PageRequestHandlerTracker's javadoc can be very useful.
And it will be great if this is reflected in the wiki page "Request Cycle
in wicket 1.5<https://cwiki.apache.org/WICKET/requestcycle-in-wicket-15.html>
".
On Wed, Aug 29, 2012 at 3:03 PM, Martin Grigorov <mgrigo...@apache.org>wrote:
> Hi,
>
> Yes, you have to register it.
> It is not registered by default because not everyone needs it.
>
> On Wed, Aug 29, 2012 at 9:01 AM, James Eliyezar <ja...@mcruncher.com>
> wrote:
> > Guys,
> >
> > From the javadoc of IRequestCycleListener, I found that we have to
> > explicitly register the implementations.
> > I thought PageRequestHandlerTracker would have been registered by default
> > as that's from wicket.
> > So, when I registered it manually, it worked as expected. This is how I
> > registered it in the wicket application's "init" method.
> >
> > @Override
> >> public void init()
> >> {
> >> super.init();
> >> getRequestCycleListeners().add(new PageRequestHandlerTracker());
> >> }
> >>
> >
> > On Wed, Aug 29, 2012 at 2:41 PM, James Eliyezar <ja...@mcruncher.com>
> wrote:
> >
> >> Should I register PageRequestHandlerTracker anywhere?
> >>
> >>
> >> On Wed, Aug 29, 2012 at 2:40 PM, James Eliyezar <ja...@mcruncher.com
> >wrote:
> >>
> >>> Alright Paul.
> >>>
> >>> This is my code:
> >>>
> >>> public class HomePage extends WebPage
> >>>> {
> >>>> private static Logger logger =
> >>>> LoggerFactory.getLogger(HomePage.class);
> >>>> private static final long serialVersionUID = 1L;
> >>>>
> >>>> public HomePage(final PageParameters parameters)
> >>>> {
> >>>> add(new Label("version",
> >>>> getApplication().getFrameworkSettings().getVersion()));
> >>>> try {
> >>>> IPageRequestHandler lastHandler =
> >>>> PageRequestHandlerTracker.getLastHandler(RequestCycle.get());
> >>>> logger.debug("Last handler: {}", lastHandler);
> >>>> logger.debug("Requested page", lastHandler.getPage());
> >>>> } catch (Exception ex) {
> >>>> logger.error("Error", ex);
> >>>> }
> >>>> }
> >>>> }
> >>>>
> >>>>
> >>> This is the log with exception stack trace:
> >>>
> >>> [INFO] Started Jetty Server
> >>>> DEBUG - HomePage - Last handler: null
> >>>> ERROR - DefaultExceptionMapper - Unexpected error occurred
> >>>> org.apache.wicket.WicketRuntimeException: Can't instantiate page using
> >>>> constructor 'public
> >>>>
> org.apache.wicket.quickstart.HomePage(org.apache.wicket.request.mapper.parameter.PageParameters)'
> >>>> and argument ''. Might be it doesn't exist, may be it is not visible
> >>>> (public).
> >>>> at
> >>>>
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:193)
> >>>> at
> >>>>
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:76)
> >>>> at
> >>>>
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:46)
> >>>> at
> >>>>
> org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:103)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.PageProvider.resolvePageInstance(PageProvider.java:274)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.PageProvider.getPageInstance(PageProvider.java:165)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:93)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:237)
> >>>> at
> >>>>
> org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167)
> >>>> at
> >>>>
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784)
> >>>> at
> >>>>
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> >>>> at
> >>>>
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255)
> >>>> at
> >>>>
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212)
> >>>> at
> >>>>
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283)
> >>>> at
> >>>>
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188)
> >>>> at
> >>>>
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:244)
> >>>> at
> >>>>
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1326)
> >>>> at
> >>>>
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
> >>>> at
> >>>>
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)
> >>>> at
> >>>>
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ContextHandler.__doHandle(ContextHandler.java:940)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java)
> >>>> at
> >>>>
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)
> >>>> at
> >>>>
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:874)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
> >>>> at
> >>>>
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
> >>>> at org.eclipse.jetty.server.Server.handle(Server.java:349)
> >>>> at
> >>>>
> org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)
> >>>> at
> >>>>
> org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:904)
> >>>> at
> org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:565)
> >>>> at
> >>>> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:217)
> >>>> at
> >>>>
> org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:46)
> >>>> at
> >>>>
> org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:545)
> >>>> at
> >>>>
> org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:43)
> >>>> at
> >>>>
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598)
> >>>> at
> >>>>
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:533)
> >>>> at java.lang.Thread.run(Thread.java:662)
> >>>> Caused by: java.lang.reflect.InvocationTargetException
> >>>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> >>>> Method)
> >>>> at
> >>>>
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> >>>> at
> >>>>
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> >>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> >>>> at
> >>>>
> org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:170)
> >>>> ... 41 more
> >>>> Caused by: java.lang.NullPointerException
> >>>> at org.apache.wicket.quickstart.HomePage.<init>(HomePage.java:22)
> >>>> ... 46 more
> >>>>
> >>>>
> >>> I've attached a quickstart project to recreate the problem.
> >>>
> >>> - Unzip it
> >>> - mvn clean package jetty:run
> >>> - Point your browser to http://localhost:8080
> >>> - Watch out the console for the exception.
> >>>
> >>>
> >>> On Wed, Aug 29, 2012 at 12:53 PM, Paul Borș <p...@bors.ws> wrote:
> >>>
> >>>> Might help if you provide a stack trace for the NPE :)
> >>>>
> >>>> Have a great day,
> >>>> Paul Borș
> >>>>
> >>>> On Aug 29, 2012, at 0:37, James Eliyezar <ja...@mcruncher.com> wrote:
> >>>>
> >>>> > Hi,
> >>>> >
> >>>> > We recently migrated our application to wicket-1.5.8.
> >>>> >
> >>>> > We have an audit aspect based on Spring AOP that shall log the
> actions
> >>>> > performed in the current page.
> >>>> > In wicket 1.4 we use to get that like
> >>>> > "RequestCycle.get().getResponsePage()".
> >>>> >
> >>>> > This has changed and I know that wicket 1.5 doesn't support this
> >>>> anymore.
> >>>> >
> >>>> > The suggested method as per the wiki is to "use a custom
> >>>> > RequestCycleListener<
> >>>> https://cwiki.apache.org/WICKET/requestcycle-in-wicket-15.html>
> >>>> > ".
> >>>> >
> >>>> > Fortunately, as highlighted in the mailing list, there is a new
> class
> >>>> in
> >>>> > wicket 1.5.8 named
> >>>> > PageRequestHandlerTracker<
> >>>>
> http://apache-wicket.1842946.n4.nabble.com/Interpolate-response-with-IResponseFilter-td4651476.html
> >>>> >to
> >>>> > meet this common requirement.
> >>>> >
> >>>> > However, when we use
> >>>> > PageRequestHandlerTracker.getLastHandler(RequestCycle.get()),
> >>>> > and then attempt to call #getPage(), a null pointer exception is
> >>>> thrown.
> >>>> >
> >>>> > Am I doing something wrong here? Please give your suggestions.
> >>>> >
> >>>> > --
> >>>> > Thanks & regards
> >>>> > James Selvakumar
> >>>> > mcruncher.com
> >>>>
> >>>> ---------------------------------------------------------------------
> >>>> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> >>>> For additional commands, e-mail: users-h...@wicket.apache.org
> >>>>
> >>>>
> >>>
> >>>
> >>> --
> >>> Thanks & regards
> >>> James Selvakumar
> >>> mcruncher.com
> >>>
> >>>
> >>
> >>
> >> --
> >> Thanks & regards
> >> James Selvakumar
> >> mcruncher.com
> >>
> >>
> >
> >
> > --
> > Thanks & regards
> > James Selvakumar
> > mcruncher.com
>
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
> For additional commands, e-mail: users-h...@wicket.apache.org
>
>
--
Thanks & regards
James Selvakumar
mcruncher.com
