Re: Wicket Multi-Threading with access to the session

[Matthias Keller]

Hi Ernesto




Matt

On 2010-02-10 12:18, Ernesto Reinaldo Barreiro wrote:

Thanks for your reply. This would basically be possible but very complicated because the threads need dozens to hundreds of values, so it would be a very tedious and complicated task to collect everything in advance just to pass it to those threads.

Why not just "collect" the information you need and pass it to the thread?
Can't you know in advance which localized values you are going to need?

Best,

Ernesto


On Wed, Feb 10, 2010 at 12:08 PM, Matthias Keller
<matthias.kel...@ergon.ch>wrote:

Hi

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?

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)

--
matthias.kel...@ergon.ch  +41 44 268 83 98
Ergon Informatik AG, Kleinstrasse 15, CH-8008 Zürich
http://www.ergon.ch
______________________________________________________________
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