Following example works fine
public class TestCounter extends WebPage {
private int counter = 0;
private Label message;
/**
*
*/
public TestCounter() {
message = new Label("message", new AbstractReadOnlyModel<String>(){
private static final long serialVersionUID = 1L;
public String getObject() {
counter++;
if(TestCounter.this.getCounter() == 0) {
return "Hi!";
} else {
return "I have been update " + getCounter();
}
};
});
message.setOutputMarkupId(true);
add(message);
message.add(new AbstractAjaxTimerBehavior(Duration.seconds(3)) {
private static final long serialVersionUID = 1L;
@Override
protected void onTimer(AjaxRequestTarget target) {
if(target != null) {
target.addComponent(message);
}
}
});
}
public int getCounter() {
return counter;
}
}
and
<html xmlns:wicket="org.apache.wicket">
<body>
<span wicket:id="message"></span>
</body>
</html>
On Wed, Nov 11, 2009 at 9:43 AM, Giambalvo, Christian <
christian.giamba...@excelsisnet.com> wrote:
> Btw, the exception is thrown on first call not on second round trip.
>
>
> -----Ursprüngliche Nachricht-----
> Von: Giambalvo, Christian [mailto:christian.giamba...@excelsisnet.com]
> Gesendet: Mittwoch, 11. November 2009 09:39
> An: users@wicket.apache.org
> Betreff: AW: AbstractAjaxTimerBehavior causes exception
>
> Hi Ernesto,
>
> the label was just an example.
> In my app i try to replace the navigation (you remember your suggestion
> with a timer?)
> The navigation is a panel. So recreate the whole panel and then try to
> replace it with the new one.
> This is where the AbstractAjaxTimerBehavior comes in.
>
> Greets Chris
>
>
> -----Ursprüngliche Nachricht-----
> Von: Ernesto Reinaldo Barreiro [mailto:reier...@gmail.com]
> Gesendet: Mittwoch, 11. November 2009 09:35
> An: users@wicket.apache.org
> Betreff: Re: AbstractAjaxTimerBehavior causes exception
>
> Hi Chris,
>
> Maybe it is because you are adding the timer to the label and later on
> replacing it is another component. Then the second AJAX round trip to the
> page will look for the AbstractAjaxTimerBehavior associated to the
> "message"
> component, but the new one does not have associated such a behavior. And
> you
> do not need to replace the label component (just udpate it via AJAX): just
> write a model that displays "If you see this message wicket is properly
> configured and running" if count =0 and "Test " + testCounter if >0.
>
> Best,
>
> Ernesto
>
> On Wed, Nov 11, 2009 at 9:21 AM, Giambalvo, Christian <
> christian.giamba...@excelsisnet.com> wrote:
>
> > Hi all,
> >
> >
> >
> > maybe i found a bug.
> >
> > Don't know if I'm doing something wrong.
> >
> > But it's a simple usecase.
> >
> >
> >
> > Following code produces an exception:
> >
> >
> >
> > public class HomePage extends WebPage {
> >
> >
> >
> > private static final long serialVersionUID = 1L;
> >
> >
> >
> > private static int testCounter = 0;
> >
> >
> >
> > public HomePage(final PageParameters parameters) {
> >
> >
> >
> > // Add the simplest type of label
> >
> > final Label test = new Label("message", "If you see this message
> > wicket is properly configured and running");
> >
> > test.add(new AbstractAjaxTimerBehavior(Duration.seconds(1))
> >
> > {
> >
> > @Override
> >
> > protected void onTimer(AjaxRequestTarget target)
> >
> > {
> >
> > Label t2 = new Label("message", "Test " + testCounter);
> >
> > test.replaceWith(t2);
> >
> > testCounter++;
> >
> > target.addComponent(test);
> >
> > }
> >
> > });
> >
> >
> >
> > add(test);
> >
> > }
> >
> > }
> >
> >
> >
> > Exception:
> >
> > Root cause:
> >
> > java.lang.IllegalStateException: No Page found for component [Component
> > id = message]
> > at org.apache.wicket.Component.getPage(Component.java:1754)
> > at org.apache.wicket.RequestCycle.urlFor(RequestCycle.java:872)
> > at org.apache.wicket.Component.urlFor(Component.java:3286)
> > at
> > org.apache.wicket.behavior.AbstractAjaxBehavior.getCallbackUrl(AbstractA
> > jaxBehavior.java:124)
> > at
> > org.apache.wicket.ajax.AbstractAjaxTimerBehavior.getCallbackScript(Abstr
> > actAjaxTimerBehavior.java:127)
> > at
> > org.apache.wicket.ajax.AbstractAjaxTimerBehavior.getJsTimeoutCall(Abstra
> > ctAjaxTimerBehavior.java:120)
> > at
> > org.apache.wicket.ajax.AbstractAjaxTimerBehavior.respond(AbstractAjaxTim
> > erBehavior.java:163)
> > at
> > org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDef
> > aultAjaxBehavior.java:299)
> > at
> > org.apache.wicket.request.target.component.listener.BehaviorRequestTarge
> > t.processEvents(BehaviorRequestTarget.java:119)
> > at
> > org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(Ab
> > stractRequestCycleProcessor.java:92)
> > at
> > org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java
> > :1250)
> > at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
> > at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
> > at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
> > at
> > org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:468
> > )
> > at
> > org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:
> > 301)
> > at
> > org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHan
> > dler.java:1157)
> > at
> > org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
> > at
> > org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:2
> > 16)
> > at
> > org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> > at
> > org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> > at
> > org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> > at
> > org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandler
> > Collection.java:230)
> > at
> > org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.jav
> > a:114)
> > at
> > org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> > at org.mortbay.jetty.Server.handle(Server.java:326)
> > at
> > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:536)
> > at
> > org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConne
> > ction.java:915)
> > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:405)
> > at
> > org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> > 409)
> > at
> > org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java
> > :582)
> >
> >
> >
> > Greets
> >
> > Chris
> >
> >
>
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