Is value null? Also, what version of Tapestry are you using? I can't
exactly remember the exception, but if your using 5.4 you may need to added
secure="literal:NEVER" to your <t:select component.
On Fri, Dec 27, 2013 at 2:51 AM, Marco Wulf <w...@dsb.net> wrote:
> Hi all,
>
> I've a Problem with a two-way select. I saw the first select with the
> right content. If I change the fist selection,
> I want to update/show the second select but I get an NullPointerException.
> If I debug, the NullpointerException occures on the following line:
>
> *accounts = mapper.getAccountsByClient(value);*All variable(value,
> accounts, mapper) are not null and the debugger pop's up the source only
> for a millisecond.
> Can anyone helps me in this case?
> Thanks
>
> Marco
>
> sample.tml
> ...
> <t:zone t:id="selectZone" id="selectZone" t:update="show">
>
>
> <t:form t:type="form" t:id="selectForm" id="selectForm">
> <t:if test="clients">
> <t:zone t:id="selectClientZone" id="selectClientZone" t:update="show"
> style="display: inline;">
> Clients: <t:select t:id="idClients" id="clientSelect"
> model="clients" value="client" t:blankLabel="Choose..."
> zone="selectAccountZone"/>
> </t:zone>
> </t:if>
>
> <t:zone t:id="selectAccountZone" id="selectAccountZone"
> t:update="show" style="display: inline;">
> <t:if test="accounts">
> Accounts: <t:select t:id="idAccounts" id="accountSelect"
> value="account" model="accountSelectModel" encoder="wprAccountDataEncoder"
> t:blankLabel="Choose..." zone="accountZone"/>
> </t:if>
> </t:zone>
>
> </t:form>
>
> </t:zone>
> ...
>
> sample.java
> ...
> @OnEvent(value=EventConstants.VALUE_CHANGED, component="idClients")
> public Object changeOnSelectClients(String value) {
>
> accounts = mapper.getAccountsByClient(value); //
> *<-
> NullPointer somewhere in
> ComponentPageElementImpl.processEventTriggering(String,
> EventContext, ComponentEventCallback)* accountSelectModel =
> selectModelFactory.create(accounts, "accountName");
> System.out.println(account.toString());
> return selectAccountZone.getBody();
> }
> ...
>
> [ERROR] TapestryModule.RequestExceptionHandler Processing of request
> failed with uncaught exception:
> org.apache.tapestry5.runtime.ComponentEventException
> org.apache.tapestry5.runtime.ComponentEventException [at
> classpath:net/dsb/css/pages/wpr_account/ChangeAccount.tml, line 39]
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1141)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$3100(ComponentPageElementImpl.java:61)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1062)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1059)
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
> at
> org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.invoke(PerThreadOperationTracker.java:87)
> at
> org.apache.tapestry5.ioc.internal.RegistryImpl.invoke(RegistryImpl.java:1124)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementResourcesImpl.invoke(ComponentPageElementResourcesImpl.java:146)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1058)
> at
> org.apache.tapestry5.internal.services.AjaxComponentEventRequestHandler.handle(AjaxComponentEventRequestHandler.java:110)
> at
> org.apache.tapestry5.internal.services.ajax.AjaxFormUpdateFilter.handle(AjaxFormUpdateFilter.java:56)
> at $ComponentEventRequestHandler_4206f778622.handle(Unknown Source)
> at $ComponentEventRequestHandler_4206f77861c.handle(Unknown Source)
> at
> org.apache.tapestry5.internal.services.AjaxFilter.handle(AjaxFilter.java:42)
> at $ComponentEventRequestHandler_4206f77861e.handle(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$41.handle(TapestryModule.java:2476)
> at $ComponentEventRequestHandler_4206f77861e.handle(Unknown Source)
> at $ComponentEventRequestHandler_4206f778563.handle(Unknown Source)
> at
> org.apache.tapestry5.internal.services.ComponentRequestHandlerTerminator.handleComponentEvent(ComponentRequestHandlerTerminator.java:43)
> at
> org.apache.tapestry5.services.InitializeActivePageName.handleComponentEvent(InitializeActivePageName.java:39)
> at
> $ComponentRequestHandler_4206f778565.handleComponentEvent(Unknown Source)
> at
> $ComponentRequestHandler_4206f778531.handleComponentEvent(Unknown Source)
> at
> org.apache.tapestry5.internal.services.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:46)
> at $Dispatcher_4206f778534.dispatch(Unknown Source)
> at $Dispatcher_4206f77852e.dispatch(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:302)
> at net.dsb.css.services.AppModule$1.service(AppModule.java:95)
> at $RequestFilter_4206f77852d.service(Unknown Source)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at
> org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$3.service(TapestryModule.java:902)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$2.service(TapestryModule.java:892)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at
> org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:90)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:105)
> at
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:95)
> at
> org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:85)
> at
> org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:119)
> at $RequestHandler_4206f77852f.service(Unknown Source)
> at $RequestHandler_4206f778522.service(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:253)
> at
> org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:53)
> at $HttpServletRequestHandler_4206f778524.service(Unknown Source)
> at
> org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
> at $HttpServletRequestFilter_4206f778520.service(Unknown Source)
> at $HttpServletRequestHandler_4206f778524.service(Unknown Source)
> at
> org.apache.tapestry5.services.TapestryModule$1.service(TapestryModule.java:852)
> at $HttpServletRequestHandler_4206f778524.service(Unknown Source)
> at $HttpServletRequestHandler_4206f77851f.service(Unknown Source)
> at
> org.apache.tapestry5.TapestryFilter.doFilter(TapestryFilter.java:171)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:417)
> at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> at
> org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:324)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> Caused by: org.apache.tapestry5.ioc.internal.OperationException [at
> classpath:net/dsb/css/pages/wpr_account/ChangeAccount.tml, line 39]
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.logAndRethrow(OperationTrackerImpl.java:121)
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:88)
> at
> org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.invoke(PerThreadOperationTracker.java:87)
> at
> org.apache.tapestry5.ioc.internal.RegistryImpl.invoke(RegistryImpl.java:1124)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementResourcesImpl.invoke(ComponentPageElementResourcesImpl.java:146)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerContextEvent(ComponentPageElementImpl.java:1058)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.triggerEvent(ComponentPageElementImpl.java:1031)
> at
> org.apache.tapestry5.internal.structure.InternalComponentResourcesImpl.triggerEvent(InternalComponentResourcesImpl.java:292)
> at
> org.apache.tapestry5.corelib.components.Select.onChange(Select.java:220)
> at
> org.apache.tapestry5.corelib.components.Select.dispatchComponentEvent(Select.java)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:940)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1117)
> ... 69 more
> Caused by: org.apache.tapestry5.runtime.ComponentEventException [at
> classpath:net/dsb/css/pages/wpr_account/ChangeAccount.tml, line 39]
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1141)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.access$3100(ComponentPageElementImpl.java:61)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1062)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$5.invoke(ComponentPageElementImpl.java:1059)
> at
> org.apache.tapestry5.ioc.internal.OperationTrackerImpl.invoke(OperationTrackerImpl.java:74)
> ... 79 more
> Caused by: java.lang.NullPointerException
> at
> net.dsb.css.pages.wpr_account.ChangeAccount.changeOnSelectClients(ChangeAccount.java:178)
> at
> net.dsb.css.pages.wpr_account.ChangeAccount.dispatchComponentEvent(ChangeAccount.java)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.dispatchEvent(ComponentPageElementImpl.java:932)
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl.processEventTriggering(ComponentPageElementImpl.java:1117)
> ... 83 more
>
>
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--
George Christman
www.CarDaddy.com
P.O. Box 735
Johnstown, New York
