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Posted to users@tapestry.apache.org by Peter Stavrinides <p....@albourne.com> on 2007/10/10 17:04:52 UTC
T5 Cryptic Error
Hi All
I use Tapestry 5, Java 6 with the maven plugin in eclipse 3.3. I am
building a user specific navigation component, and I am getting this
strange error:
java.lang.LinkageError
loader constraint violation: when resolving method
"com.web.services.BreadCrumbs.getRootLink()Lcom/web/components/IrmLink;"
the class loader (instance of
org/apache/tapestry/internal/services/ComponentInstantiatorSourceImpl$PackageAwareLoader)
of the current class, com/web/components/Navigation, and the class
loader (instance of org/mortbay/jetty/webapp/WebAppClassLoader) for
resolved class, com/web/services/BreadCrumbs, have different Class
objects for the type com/web/components/IrmLink used in the signature
I have tried to clean the project several times thinking this is an
issue with cached resources on the classpath, but have had no luck, so I
am starting to wonder if this could relate to Java 6 and the maven plugin.
Has anyone seen this before?
thanks for your help.
Peter
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Re: T5 Cryptic Error
Posted by Peter Stavrinides <p....@albourne.com>.
Oh I see! thanks !!
My BreadCrumbs class needs to be an ASO which is needed by the
navigation component, it also requires ComponentResources. I was
injecting them (using @Inject and @ApplicationState)
So instead I should use InjectService("ComponentResources") in the
BreadCrumbsImpl constructor and then Navigation should implement
BreadCrumbs. But I'm not sure how to create the service as an ASO in
AppModule, perhaps:
@Inject
private ComponentResources resources_;
public void contributeApplicationStateManager(
MappedConfiguration<Class, ApplicationStateContribution>
configuration) {
ApplicationStateCreator<BreadCrumbs> creator = new
ApplicationStateCreator<BreadCrumbs>() {
public BreadCrumbs create() {
return new BreadCrumbs(resources_);
}
};
configuration.add(BreadCrumbs.class, new
ApplicationStateContribution(
"session", creator));
}
Thanks again,
Peter
Howard Lewis Ship wrote:
> Please check out:
> http://tapestry.apache.org/tapestry5/tapestry-core/guide/reload.html
>
> Basically, you shouldn't mix component classes with services classes. When
> you do so, you need to define an interface for your components to implement.
>
> On 10/10/07, Peter Stavrinides <p....@albourne.com> wrote:
>
>> Hi All
>>
>> I use Tapestry 5, Java 6 with the maven plugin in eclipse 3.3. I am
>> building a user specific navigation component, and I am getting this
>> strange error:
>>
>> java.lang.LinkageError
>> loader constraint violation: when resolving method
>> "com.web.services.BreadCrumbs.getRootLink()Lcom/web/components/IrmLink;"
>> the class loader (instance of
>>
>> org/apache/tapestry/internal/services/ComponentInstantiatorSourceImpl$PackageAwareLoader)
>> of the current class, com/web/components/Navigation, and the class
>> loader (instance of org/mortbay/jetty/webapp/WebAppClassLoader) for
>> resolved class, com/web/services/BreadCrumbs, have different Class
>> objects for the type com/web/components/IrmLink used in the signature
>>
>> I have tried to clean the project several times thinking this is an
>> issue with cached resources on the classpath, but have had no luck, so I
>> am starting to wonder if this could relate to Java 6 and the maven plugin.
>>
>> Has anyone seen this before?
>>
>> thanks for your help.
>>
>> Peter
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
>> For additional commands, e-mail: users-help@tapestry.apache.org
>>
>>
>>
>
>
>
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Re: T5 Cryptic Error
Posted by Howard Lewis Ship <hl...@gmail.com>.
Please check out:
http://tapestry.apache.org/tapestry5/tapestry-core/guide/reload.html
Basically, you shouldn't mix component classes with services classes. When
you do so, you need to define an interface for your components to implement.
On 10/10/07, Peter Stavrinides <p....@albourne.com> wrote:
>
> Hi All
>
> I use Tapestry 5, Java 6 with the maven plugin in eclipse 3.3. I am
> building a user specific navigation component, and I am getting this
> strange error:
>
> java.lang.LinkageError
> loader constraint violation: when resolving method
> "com.web.services.BreadCrumbs.getRootLink()Lcom/web/components/IrmLink;"
> the class loader (instance of
>
> org/apache/tapestry/internal/services/ComponentInstantiatorSourceImpl$PackageAwareLoader)
> of the current class, com/web/components/Navigation, and the class
> loader (instance of org/mortbay/jetty/webapp/WebAppClassLoader) for
> resolved class, com/web/services/BreadCrumbs, have different Class
> objects for the type com/web/components/IrmLink used in the signature
>
> I have tried to clean the project several times thinking this is an
> issue with cached resources on the classpath, but have had no luck, so I
> am starting to wonder if this could relate to Java 6 and the maven plugin.
>
> Has anyone seen this before?
>
> thanks for your help.
>
> Peter
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
Howard M. Lewis Ship
Partner and Senior Architect at Feature50
Creator Apache Tapestry and Apache HiveMind