Hi Martin,
Sorry, should have mentioned that I also tried doing that. The result is
the orange exception page with "Unexpected Runtime Exception":
Last cause: null
Stacktrace
Root cause:
org.apache.wicket.RestartResponseException
Thanks,
Neil
On Mon, Feb 27, 2012 at 11:01 AM, Martin Grigorov <mgrigo...@apache.org>wrote:
> Hi,
>
> On Sat, Feb 25, 2012 at 12:20 AM, Neil Curzon <neil.cur...@gmail.com>
> wrote:
> > Hi all,
> >
> > We've been using an IRequestCycleListener in order to redirect to a
> certain
> > page for all requests if certain conditions are met. We're finding that
> > it's giving an exception in 1.5.4:
> >
> > java.lang.IllegalStateException: Header was already written to response!
> > at
> >
> org.apache.wicket.protocol.http.HeaderBufferingWebResponse.checkHeader(HeaderBufferingWebResponse.java:64)
> > at
> >
> org.apache.wicket.protocol.http.HeaderBufferingWebResponse.setDateHeader(HeaderBufferingWebResponse.java:134)
> > at
> >
> org.apache.wicket.protocol.http.BufferedWebResponse$SetDateHeaderAction.invoke(BufferedWebResponse.java:310)
> > at
> >
> org.apache.wicket.protocol.http.BufferedWebResponse.writeTo(BufferedWebResponse.java:580)
> > at
> >
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:185)
> > at
> >
> org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167)
> > at
> >
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:781)
> >
> > basically in our IRequestCycleListener we have
> >
> > @Override
> > public void onBeginRequest(RequestCycle cycle) {
> > if (<condition>)) {
> > cycle.setResponsePage(SpecificPage.class);
>
> better use: throw new RestartResponseException()
>
> this will both save you some CPU cycles and additionally will reset
> the WebResponse (drop any set headers and body)
>
> > }
> > }
> >
> > Is this the wrong way to do it? Or is this behavior expected? If it's not
> > expected, I will file a bug for this.
> >
> > Thanks,
> > Neil
>
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com
>
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