Wicket Multi-Threading with access to the session

[Matthias Keller]

Hi






Thanks!

Matt


Here's the stacktrace:

WicketMessage: Method onFormSubmitted of interface 
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at component 
[MarkupContainer [Component id = SignupForm]] threw an exception

Root cause:

ExceptionConverter: java.io.IOException: No message found for 
the.document.has.no.pages

Complete stack:

org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of interface 
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at component 
[MarkupContainer [Component id = SignupForm]] threw an exception
at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:194)
at 
org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
at 
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
at 
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1175)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1252)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1353)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:355)

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at java.lang.reflect.Method.invoke(Method.java:597)
at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:183)
at 
org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
at 
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)
at 
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1175)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1252)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1353)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:355)

We have a complex application which needs to calculate some very expensive things. Those could easily be parallelized so we thought about having a thread pool to do that. Unfortunately, that code needs access to the localizer and the application (for some configuration values) so we're setting the Session and the Application explicitly in that thread using Application.set() and Session.set(). But this always leads to a strange error - I suspect it has something to do with the 'duplicated' session or application? Any hints about how to do this correctly? Do we need to do something special with the session or application at the end of the thread?

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