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https://issues.apache.org/jira/browse/WICKET-1403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12597792#action_12597792
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javadoc edited comment on WICKET-1403 at 5/18/08 1:33 AM:
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In the meantime, i found this little nasty hack to get the state serialized.
The Problem is, that Guice´s Type is not Serializable right now. The solution
was to store it in the Application´s MetaData, which is of course lost when
restarting the Application.
What i do here (see Attachment: GuiceProxyTargetLocator.java) is using XStream
in order to 'serialize' the Type to XML, which then can be serialized normally,
so that the MetaData-stuff can be dropped.
This is of course not a valid solution to the above problem, as it introduces a
dependency to XStream, but it temporarily makes the roundtrip with guice
possible.
To anyone using this hack: note that XStream does not necessarily behave
consistently on any JVM:
http://xstream.codehaus.org/faq.html#Compatibility.
I also asked the Guice-guys to make Type Serializable, which would solve the
whole thing.
was (Author: javadoc):
In the meantime, i found this little nasty hack to get the state serialized.
The Problem is, that Guice´s Type is not Serializable right now. The solution
was to store it in the Application´s MetaData, which is of course lost when
restarting the Application.
What i do here is using XStream in order to 'serialize' the Type to XML, which
then can be serialized normally, so that the MetaData-stuff can be dropped.
This is of course not a valid solution to the above problem, as it introduces a
dependency to XStream, but it temporarily makes the roundtrip with guice
possible.
To anyone using this hack: note that XStream does not necessarily behave
consistently on any JVM:
http://xstream.codehaus.org/faq.html#Compatibility.
I also asked the Guice-guys to make Type Serializable, which would solve the
whole thing.
> Reinjection fails after Server restart
> --------------------------------------
>
> Key: WICKET-1403
> URL: https://issues.apache.org/jira/browse/WICKET-1403
> Project: Wicket
> Issue Type: Bug
> Components: wicket-guice
> Affects Versions: 1.3.1
> Environment: Resin 3.1.5 with persistent sessions enabled,
> Apache Tomcat 6.0.16 with persistent sessions enabled
> Reporter: uwe schaefer
> Assignee: Alastair Maw
> Priority: Minor
> Attachments: example.zip, GuiceProxyTargetLocator.java
>
>
> Please see attached testcase.
> Steps to reproduce:
> * start it with mvn resin:run, go to http://localhost:8080/example
> * click a few times
> * stop & restart
> * reload the page (everything fine here (means reload obviously succeeds)
> * click again, you´ll face
> {code}
> Caused by: java.lang.NullPointerException: type
> at com.google.inject.util.Objects.nonNull(Objects.java:35)
> at com.google.inject.TypeLiteral.<init>(TypeLiteral.java:69)
> at
> com.google.inject.TypeLiteral$SimpleTypeLiteral.<init>(TypeLiteral.java:181)
> at com.google.inject.TypeLiteral.get(TypeLiteral.java:169)
> at
> org.apache.wicket.guice.GuiceProxyTargetLocator.locateProxyTarget(GuiceProxyTargetLocator.java:61)
> at
> org.apache.wicket.proxy.LazyInitProxyFactory$JdkHandler.invoke(LazyInitProxyFactory.java:412)
> at org.apache.wicket.proxy.$Proxy13.foo(Unknown Source)
> at org.codesmell.HomePage$1.onClick(HomePage.java:25)
> at org.apache.wicket.markup.html.link.Link.onLinkClicked(Link.java:214)
> ... 21 more
> {code}
> GuiceProxyTargetLocator does not seem to be coded to cope with this.
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