Hi Josh,
Thanks for looking.
I'm afraid the stack trace I provided is a red herring and does not have any
bearing on the situation. It comes from the fact that my encoder was
getting purged from the session due to it being set as FLASH only. And this
exception actually only happens after I changed the code from:
<form t:id="parts" t:zone="nothingSelectedZone">
to
<form t:id="parts" t:zone="resultsZone">
which actually works... it's as if something in the form needs to be rebuilt
after the submit.
You say you were able to get my code to work? As is, or did you need to make
changes? I'd still like to have the flexibility to refresh the
nothingSelectedZone and not touch the resultsZone.
Cheers,
Levi
Josh Canfield wrote:
>
> Your example code works fine and the exception you provide makes it
> look like you're in a loop?
>
>> Caused by: java.lang.NullPointerException
>> at
>> org.apache.tapestry5.corelib.components.Loop.restoreStateFromStoredClientValue(Loop.java:457)
>
> That line from the code:
> // We assume that if an encoder is available when we rendered,
> that one will be available
> // when the form is submitted.
> Object restoredValue = encoder.toValue(clientValue);
>
> Makes me think that you aren't getting an encoder?
>
> Can you provide a simple and complete example that breaks?
> Josh
>
> On Fri, Oct 2, 2009 at 4:50 PM, xfile80303 <l...@grokers.net> wrote:
>>
>> Okay, I have some more information...
>>
>> When I click on the submit button, after the validation error, I see this
>> in
>> the log:
>>
>> ERROR [http-8080-5: RequestExceptionHandler]: Processing of request
>> failed
>> with uncaught exception:
>> org.apache.tapestry5.runtime.ComponentEventException
>> org.apache.tapestry5.runtime.ComponentEventException [at
>> classpath:com/java/dse/cwp/eos/pages/Search.tml, line 106]
>> at
>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1098)
>> at
>> org.apache.tapestry5.internal.services.AjaxComponentEventRequestHandler.handle(AjaxComponentEventRequestHandler.java:107)
>> at
>> $ComponentEventRequestHandler_12417a4b929.handle($ComponentEventRequestHandler_12417a4b929.java)
>> at
>> org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
>> at
>> $ComponentEventRequestHandler_12417a4b92b.handle($ComponentEventRequestHandler_12417a4b92b.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$36.handle(TapestryModule.java:2164)
>> at
>> $ComponentEventRequestHandler_12417a4b92b.handle($ComponentEventRequestHandler_12417a4b92b.java)
>> at
>> $ComponentEventRequestHandler_12417a4b911.handle($ComponentEventRequestHandler_12417a4b911.java)
>> at
>> org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
>> at
>> $ComponentRequestHandler_12417a4b80d.handleComponentEvent($ComponentRequestHandler_12417a4b80d.java)
>> at
>> org.apache.tapestry5.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:46)
>> at $Dispatcher_12417a4b819.dispatch($Dispatcher_12417a4b819.java)
>> at $Dispatcher_12417a4b80a.dispatch($Dispatcher_12417a4b80a.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:245)
>> at
>> org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$4.service(TapestryModule.java:778)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:767)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:85)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> com.java.dse.cwp.eos.services.EosModule$1.service(EosModule.java:254)
>> at
>> $RequestFilter_12417a4b806.service($RequestFilter_12417a4b806.java)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:90)
>> at
>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:81)
>> at
>> org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
>> at
>> org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:103)
>> at
>> $RequestHandler_12417a4b80b.service($RequestHandler_12417a4b80b.java)
>> at
>> $RequestHandler_12417a4b800.service($RequestHandler_12417a4b800.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:197)
>> at
>> org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:53)
>> at
>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>> at
>> org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
>> at
>> $HttpServletRequestFilter_12417a4b7ff.service($HttpServletRequestFilter_12417a4b7ff.java)
>> at
>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>> at
>> org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:726)
>> at
>> $HttpServletRequestHandler_12417a4b802.service($HttpServletRequestHandler_12417a4b802.java)
>> at
>> $HttpServletRequestHandler_12417a4b7fd.service($HttpServletRequestHandler_12417a4b7fd.java)
>> at
>> org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:127)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>> at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>> at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>> at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>> at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>> at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
>> at
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
>> at
>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
>> at
>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
>> at java.lang.Thread.run(Thread.java:637)
>> Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException [at
>> classpath:com/java/dse/cwp/eos/pages/Search.tml, line 130]
>> at
>> org.apache.tapestry5.corelib.components.Form.executeStoredActions(Form.java:495)
>> at
>> org.apache.tapestry5.corelib.components.Form._$advised$onAction(Form.java:378)
>> at
>> org.apache.tapestry5.corelib.components.Form$onAction$invocation_12417a50156.invokeAdvisedMethod(Form$onAction$invocation_12417a50156.java)
>> at
>> org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:71)
>> at
>> org.apache.tapestry5.ioc.internal.services.LoggingAdvice.advise(LoggingAdvice.java:37)
>> at
>> org.apache.tapestry5.internal.transform.LogWorker$1.advise(LogWorker.java:54)
>> at
>> org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:80)
>> at
>> org.apache.tapestry5.corelib.components.Form.onAction(Form.java)
>> at
>> org.apache.tapestry5.corelib.components.Form.dispatchComponentEvent(Form.java)
>> at
>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:910)
>> at
>> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1081)
>> ... 52 more
>> Caused by: java.lang.NullPointerException
>> at
>> org.apache.tapestry5.corelib.components.Loop.restoreStateFromStoredClientValue(Loop.java:457)
>> at
>> org.apache.tapestry5.corelib.components.Loop.access$500(Loop.java:44)
>> at
>> org.apache.tapestry5.corelib.components.Loop$RestoreStateFromStoredClientValue.execute(Loop.java:165)
>> at
>> org.apache.tapestry5.corelib.components.Loop$RestoreStateFromStoredClientValue.execute(Loop.java:154)
>> at
>> org.apache.tapestry5.corelib.components.Form.executeStoredActions(Form.java:480)
>> ... 62 more
>>
>>
>> I would really appreciate some help understanding why this is broken.
>>
>> Thanks,
>>
>> Levi
>>
>>
>> xfile80303 wrote:
>>>
>>> Hello all,
>>>
>>> I'm seing some interesting behavior I hope you can help me sort out.
>>>
>>> I have a form which I would like to display an error message (custom)
>>> should the form validation fail. I'd like to do this via AJAX since the
>>> contents of the form are created via AJAX and refreshing the page to
>>> display this error message will lose this context.
>>>
>>> So, I have something like this:
>>>
>>> <t:zone t:id="nothingSelectedZone" id="nothingSelectedZone"
>>> visible="${errorVisible}">
>>> No items have been selected.
>>> </t:zone>
>>>
>>> <t:zone t:id="resultsZone" id="resultsZone" visible="${resultsVisible}">
>>> <form t:id="parts" t:zone="nothingSelectedZone">
>>> <input type="button" t:type="submit" value="Do It"/>
>>> </form>
>>> </t:zone>
>>>
>>> void onValidateFormFromParts()
>>> {
>>> if (isValid())
>>> {
>>> _parts.recordError("No items selected.");
>>> }
>>> else
>>> {
>>> _parts.clearErrors();
>>> }
>>> errorVisible = _parts.getHasErrors();
>>> }
>>>
>>> Object onSuccessFromParts()
>>> {
>>> return otherPage;
>>> }
>>>
>>> Object onFailureFromParts()
>>> {
>>> return nothingSelectedZone.getBody();
>>> }
>>>
>>> If there's no error with validation, the success method gets called
>>> fine,
>>> and I am redirected to the otherPage.
>>> If there is an error with validation, the nothingSelectedZone is updated
>>> and the error message is displayed.
>>> However, if, after a validation error I try to re-submit the form,
>>> nothing
>>> happens at all. I've put breakpoints in my debugger on these three
>>> methods and they don't get hit in this case. It's as if the form submit
>>> is not taking place after the initial validation error.
>>>
>>> I'd love some input.
>>>
>>> Thanks,
>>>
>>> Levi
>>>
>>>
>>
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>
>
>
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