Thanks Igor,
I have seen that the Objects class provides a static setter in order to
use a different Implementation of IObjectStreamFactory instead of the
DefaultObjectStreamFactory.
Where would you recommend to place the code to set my own implementation
of IObjectStreamFactory using the static setter provided by Objects. I
am not sure if it is "enough" to place it in the init method of my class
that derives from org.apache.wicket.Application. (i.e., may the Objects
instance be cleared at some time by the GC?)
thanks,
andr
On 02.11.2009 17:28, Igor Vaynberg wrote:
that should most likely work without problems.
-igor
On Mon, Nov 2, 2009 at 1:47 AM, Andreas Maza<andr.m...@gmail.com> wrote:
just to circumvent the problem for a while, I am thinking of the following
workaround:
what would be the implications if I change the implementation of
IObjectStreamFactor.DefaultObjectStreamFactory so that
newObjectInputStream() and newObjectOutputStream return the regular JDK
ObjectInputStream and ObjectOutputStream, respectively?
To my mind, this would eliminate the AccessControlException problem since I
am not subclassing ObjectInputStream and ObjectOutputStream.
thanks,
andr
On 30.10.2009 10:27, A. Maza wrote:
yes, except the fact that I am trying to use a Memcache-based
implementation of the IPageStore instead of the HTTPSessionStore (based on
the TerracottaPageStore. However, in my case the exception occurs when I am
trying to serialize the page using the provided method of the
AbstractPageStore.
The exception of the second stacktrace I posted was reported by another
user in the GAE forum [1], but happening in a totally different scenario.
In my initial post I forgot the link to the issue I have opened on the GAE
project site. [2]
I am using Wicket 1.4.3 (I have also tried it with 1.4.2) and the latest
GAE SDK (1.2.6)
regards,
andr
[1]
<http://groups.google.com/group/google-appengine-java/browse_thread/thread/b80648c126778ef5/0a259ba5bba8078f?lnk=gst&q=wicket+accesscontrolexception#0a259ba5bba8078f>
[2]<http://code.google.com/p/googleappengine/issues/detail?id=2334>
On 29.10.2009 21:56, Esteban Masoero wrote:
I'm sure the answer is "yes" but to be sure: have you done everything
that is said here
http://stronglytypedblog.blogspot.com/2009/04/wicket-on-google-app-engine.html
?
Also, what versions of gae sdk and wicket are you using?
A. Maza escribió:
Hi,
I've encountered now (and have seen reported by other users) several
different cases where Wicket on GAE throws an AccessControlException
when serializing an object to a byte array.
Although this is clearly an issue of GAE permissions, I would like to
ask if someone could give me a hint, why this exception occurs or if
someone may know a workaround. I've already filed an issue for this on
the GAE project site [1] and would forward any findings of the wicket
community.
Below I include snippets of two different stacktraces.
Thanks in advance,
andr
<snip1>
java.security.AccessControlException: access denied
(java.io.SerializablePermission enableSubclassImplementation)
at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at
java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at
com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:151)
at java.io.ObjectOutputStream.<init>(ObjectOutputStream.java:253)
at
org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory$2.<init>(IObjectStreamFactory.java:150)
at
org.apache.wicket.util.io.IObjectStreamFactory$DefaultObjectStreamFactory.newObjectOutputStream(IObjectStreamFactory.java:114)
at
org.apache.wicket.util.lang.Objects.objectToByteArray(Objects.java:1111)
at
org.apache.wicket.protocol.http.pagestore.AbstractPageStore.serializePage(AbstractPageStore.java:203)
</snip1>
<snip2>
(java.io.SerializablePermission enableSubstitution)
at java.security.AccessControlContext.checkPermission
(AccessControlContext.java:264)
at java.security.AccessController.checkPermission
(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:
532)
at com.google.appengine.tools.development.DevAppServerFactory
$CustomSecurityManager.checkPermission(DevAppServerFactory.java:122)
at java.io.ObjectOutputStream.enableReplaceObject
(ObjectOutputStream.java:556)
at org.apache.wicket.util.lang.Objects
$ReplaceObjectOutputStream.<init>(Objects.java:179)
at org.apache.wicket.util.lang.Objects
$ReplaceObjectOutputStream.<init>(Objects.java:170)
at org.apache.wicket.util.lang.Objects.cloneModel(Objects.java:442)
at org.apache.wicket.version.undo.ModelChange.<init>(ModelChange.java:
103)
at org.apache.wicket.version.undo.ChangeList.componentModelChanging
(ChangeList.java:64)
at
org.apache.wicket.version.undo.UndoPageVersionManager.componentModelChanging
(UndoPageVersionManager.java:123)
at org.apache.wicket.Page.componentModelChanging(Page.java:1555)
at org.apache.wicket.Component.modelChanging(Component.java:2197)
at org.apache.wicket.Component.setDefaultModelObject(Component.java:
3020)
at
org.apache.wicket.extensions.markup.html.tabs.TabbedPanel.setSelectedTab
(TabbedPanel.java:346)
at org.apache.wicket.extensions.markup.html.tabs.TabbedPanel$5.onClick
(TabbedPanel.java:327)
at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:
221)
</snip2>
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