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 <[email protected]> wrote:
> Should I register PageRequestHandlerTracker anywhere?
>
>
> On Wed, Aug 29, 2012 at 2:40 PM, James Eliyezar <[email protected]>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 <[email protected]> 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 <[email protected]> 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: [email protected]
>>> For additional commands, e-mail: [email protected]
>>>
>>>
>>
>>
>> --
>> Thanks & regards
>> James Selvakumar
>> mcruncher.com
>>
>>
>
>
> --
> Thanks & regards
> James Selvakumar
> mcruncher.com
>
>
--
Thanks & regards
James Selvakumar
mcruncher.com
