Thanks for the tip, Andreas, but three problems:
* pageValidate(..) does not have access to the rewind-phase.
Sometimes there is work I only want to do -- or /not/ do -- in this
phase, and I lose that control.
* pageValidate(..) on PageA is called even when it's just a
@DirectListener being called from PageA
* pageValidate(..) on PageA is called when PageA is merely injected
into another page, even if PageA is never actually used.
Those latter two issues are, obviously, slowing my application down.
So .. if not pageBeginRender(..) (because I can't do exception-possible
work because I can't send the user to an ad hoc page via
PageRedirectException) or pageValidate(..) (because it's called in two
places where the page isn't actually ultimately rendered), I'm confused
as to where I do the work to initialize a page with everything its
template needs to display. I want all this logic encapsulated in the
page itself, and not spread out to every page-listener that could
forward to it.
Currently, I have page-listeners call an initializePage(..) method on
the target page, which merely sets a few properties that my
pageBeginRender/pageValidate methods would use to query all the
necessary information out, and then the page-listener returns the
initialized page for rendering. I think my plan now is to refactor all
those initialization methods to do all the query-work themselves, and
then return either the target page, or an initialized error page, which
the page-listener will in turn return for rendering. That would
gracefully handle the latter two issues above, but initialization work
specific to the rewind phase is still lost to me.
Thanks,
Jim
Andreas Andreou wrote:
See the PageValidateListener interface
Implement that and move the redirect logic into
void pageValidate(PageEvent event);
On Wed, Aug 20, 2008 at 1:24 PM, Jim <[EMAIL PROTECTED]> wrote:
Hello,
I have PageA throwing a PageRedirectException to PageB in its
pageBeginRender, and PageB throwing a PageRedirectException to PageC in its
pageBeginRender. However, PageB's PageRedirectException is resulting in the
Tapestry exception-page, without trying to render PageC -- the
exception-report lists only "org.apache.tapestry.PageRedirectException" and
its stacktrace as the problem.
My expectation was that Tapestry would keep passing the baton from page to
page until one rendered -- is that not the intention?
Here's the stacktrace below where the PageRedirectException was thrown:
org.apache.tapestry.AbstractPage.firePageBeginRender(AbstractPage.java:409)
org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:244)
org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:400)
org.apache.tapestry.services.impl.DefaultResponseBuilder.renderResponse(DefaultResponseBuilder.java:159)
org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:33)
$ResponseRenderer_11bdf8e6cf5.renderResponse($ResponseRenderer_11bdf8e6cf5.java)
org.apache.tapestry.engine.AbstractEngine.renderResponse(AbstractEngine.java:201)
org.apache.tapestry.engine.AbstractEngine.handlePageRedirectException(AbstractEngine.java:329)
org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:245)
org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:54)
$WebRequestServicer_11bdf8e6d3d.service($WebRequestServicer_11bdf8e6d3d.java)
org.apache.tapestry.services.impl.DisableCachingFilter.service(DisableCachingFilter.java:54)
$WebRequestServicerFilter_11bdf8e6d3f.service($WebRequestServicerFilter_11bdf8e6d3f.java)
$WebRequestServicer_11bdf8e6d41.service($WebRequestServicer_11bdf8e6d41.java)
$WebRequestServicer_11bdf8e6d39.service($WebRequestServicer_11bdf8e6d39.java)
org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:61)
$ServletRequestServicer_11bdf8e6d1d.service($ServletRequestServicer_11bdf8e6d1d.java)
org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
$ServletRequestServicerFilter_11bdf8e6d1f.service($ServletRequestServicerFilter_11bdf8e6d1f.java)
$ServletRequestServicer_11bdf8e6d21.service($ServletRequestServicer_11bdf8e6d21.java)
org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
$ServletRequestServicerFilter_11bdf8e6d1b.service($ServletRequestServicerFilter_11bdf8e6d1b.java)
$ServletRequestServicer_11bdf8e6d21.service($ServletRequestServicer_11bdf8e6d21.java)
org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
$ServletRequestServicerFilter_11bdf8e6d19.service($ServletRequestServicerFilter_11bdf8e6d19.java)
$ServletRequestServicer_11bdf8e6d21.service($ServletRequestServicer_11bdf8e6d21.java)
$ServletRequestServicer_11bdf8e6d13.service($ServletRequestServicer_11bdf8e6d13.java)
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:126)
org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:103)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:810)
Thanks,
Jim
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