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https://issues.apache.org/jira/browse/WICKET-3483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000025#comment-13000025
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Martin Grigorov commented on WICKET-3483:
-----------------------------------------
Hi,
I don't have applications running on GAE. I find GAE too restrictive for web
applications.
I created a GAE account some time ago just to test Wicket 1.5.
"I am tempted to think that returning "false" in PageManager.isReplicated() is
to blame, it should probably be overridden to "true"".
Which PageManager do you mean ?
IPageManager has no such method.
IDataStore has one and the recommended implementation for GAE (see
gae-initializer, it uses HttpSessionDataStore) returns "true".
DiskDataStore, the default one for Wicket apps, doesn't support replication.
gae-initializer is hosted at GitHub -
https://github.com/wicketstuff/core/tree/master/jdk-1.5-parent/gae-initializer-parent
> NullPointerException in PersistentPageManager's page cache
> ----------------------------------------------------------
>
> Key: WICKET-3483
> URL: https://issues.apache.org/jira/browse/WICKET-3483
> Project: Wicket
> Issue Type: Bug
> Components: wicket-core
> Affects Versions: 1.5-RC2
> Environment: Google AppEngine
> Reporter: Martin Grigorov
> Assignee: Martin Grigorov
> Fix For: 1.5-RC3
>
>
> From a private email to me by a user:
> Hi,
> I'm trying to use your gae-initializer to get your test application working
> on GAE. I'm using version 1.5-rc2 of wicket and your initializer. Using GAE
> sdk 1.4.2.
> I'm getting the same problem the person on the 1.5-rc1 release page was
> getting, and I can't get around it.
> The homepage loads, but the other page throws the same null pointer exception
> he was getting:
> java.lang.NullPointerException
> at
> org.apache.wicket.page.PersistentPageManager$SessionEntry.findPage(PersistentPageManager.java:117)
> ....
> --------------------------------
> The problem is that
> org.apache.wicket.page.PersistentPageManager.SessionEntry.addPage(IManageablePage)
> adds even 'null' pages.
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