Re: Standalone distro broken when working with extensions?

[Jim Marino]

A multiparent classloader along with something that calculates the  
transitive closure of extension dependencies would probably fix this,  
something along the lines of (not having looked closely at this):

1. As the extension is being loaded, the following would happen:
- A classloader would be created for the extension's system  
composite. This would have as one of its parents the classloader of  
the parent composite. Another parent would be a classloader that was  
instantiated for the main dependency jar, call that the "extension  
classloader". Additional dependencies would be loaded in classloaders  
which were parents to the extension classloader

2. As the application composite is loaded, the following would then  
happen:

- the application classloader will have multiple parents: the  
classloader of the parent application context and the "extension  
classloader" defined above.

If someone can point me to the specific problem, I can take a look.   
In any event, we should generally not be setting CCL and only do so  
in very specific circumstances.

Jim

On Aug 18, 2006, at 11:45 AM, Raymond Feng wrote:

Hi,

I created a JIRA against Axis2: http://issues.apache.org/jira/ 
browse/AXIS2-1047

Does it make sense?

Thanks,
Raymond

----- Original Message ----- From: "ant elder" <[EMAIL PROTECTED]>
To: <tuscany-dev@ws.apache.org>
Sent: Friday, August 18, 2006 7:29 AM
Subject: Re: Standalone distro broken when working with extensions?


The problem is
org.apache.axis2.deployment.DescriptionBuilder.processMessageReceiver 
s its
using the thread context class loader to find the Axis2 message  
receiver
classes but thats not going contain them as they are in the  
Tuscany launcher
boot or extension class loader.

  ...ant

On 8/18/06, ant elder <[EMAIL PROTECTED]> wrote:

I feel your pain Rick, I'm having similar problems getting  
servlet based
services to go with one classloader issue after another. I'd hit  
this
problem you're seeing and had just bypassed the axis bit to see  
what other
problems i hit next. The one thats next is too hard so i'll go  
back now and
try to work out whats going on here with the axis2 config...

   ...ant


On 8/18/06, Rick Rineholt < [EMAIL PROTECTED]> wrote:
>
> Wanting to run some webservices (axis) client bindings from the a
> command line environment I've encountered several roadblocks.  
It was
> possible to previously use the standalone distro, create an  
extension
> directory drop the jar containing the extension into that  
directory and
> put all jars it depends on into the boot directory.  I know  
putting all
> the dependent jars into the boot was a temporary workaround.
> I've not done any deep analysis on this but I suspect some of the
> binding initialization is happening when only the application
> classloader is in scope.  I've also tried another approach by just
> including the extensions (axis) dependent jars on the original
> classpath.  Doing this seem to have the system scan those jars  
as "sca
> bundles (jars)" looking for a default.scdl and throwing an  
exception if
> its not found.
>
> Is there a correct way to make this work with what is in SVN ?   
If yes,
> how?
> If not, anyone know of a quick workaround so I can make  
progress on
> this?  I'd prefer a solution not involving running in some other
> environment (junit, eclipse, maven etc).
> If no, anone working on this? Any idea how soon it can  be  
fixed?  Need
> help?
> Thanks
>
> Running this I see:
> log4j:WARN No appenders could be found for logger
> (org.apache.axiom.om.util.StAXUtils).
> log4j:WARN Please initialize the log4j system properly.
> Exception in thread "main"
> org.apache.tuscany.spi.component.TargetException: Error  
initializing
> component instance [directoryScanExtender]
>     at
> org.apache.tuscany.core.implementation.PojoAtomicComponent.init(
> PojoAtomicComponent.java:96)
>     at
> org.apache.tuscany.core.component.scope.InstanceWrapperImpl.start(
> InstanceWrapperImpl.java:49)
>     at
>
>  
org.apache.tuscany.core.component.scope.ModuleScopeContainer.eagerIn 
itComponents
> (ModuleScopeContainer.java:154)
>     at
>  
org.apache.tuscany.core.component.scope.ModuleScopeContainer.onEvent 
(
> ModuleScopeContainer.java :68)
>     at
> org.apache.tuscany.spi.component.AbstractSCAObject.publish(
> AbstractSCAObject.java:92)
>     at
>
>  
org.apache.tuscany.core.implementation.composite.AbstractCompositeCo 
mponent.publish
> (AbstractCompositeComponent.java :178)
>     at
>
>  
org.apache.tuscany.core.implementation.composite.AbstractCompositeCo 
mponent.start
> (AbstractCompositeComponent.java:117)
>     at
> org.apache.tuscany.core.launcher.LauncherImpl.bootRuntime(
> LauncherImpl.java :100)
>     at
> org.apache.tuscany.core.launcher.MainLauncherImpl.boot(
> MainLauncherImpl.java:140)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at
> sun.reflect.NativeMethodAccessorImpl.invoke (
> NativeMethodAccessorImpl.java:39)
>     at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:25)
>     at java.lang.reflect.Method.invoke(Method.java:585)
>     at org.apache.tuscany.hostutil.LaunchHelper.invoke (
> LaunchHelper.java:96)
>     at
> org.apache.tuscany.launcher.MainLauncherBooter.main(
> MainLauncherBooter.java:51)
> Caused by:  
org.apache.tuscany.core.injection.ObjectCallbackException:
> Exception thrown by callback method [public void
>  
org.apache.tuscany.core.services.extension.DirectoryScanExtender.ini 
t()]
>     at
> org.apache.tuscany.core.injection.MethodEventInvoker.invokeEvent(
> MethodEventInvoker.java:46)
>     at
> org.apache.tuscany.core.implementation.PojoAtomicComponent.init (
> PojoAtomicComponent.java:94)
>     ... 14 more
> Caused by: org.apache.tuscany.spi.ObjectCreationException:  
Exception
> thrown by setter [setServletHost]
>     at
> org.apache.tuscany.core.injection.MethodInjector.inject (
> MethodInjector.java:54)
>     at
>
>  
org.apache.tuscany.core.implementation.PojoAtomicComponent.createIns 
tance
> (PojoAtomicComponent.java:123)
>     at
>
>  
org.apache.tuscany.core.component.scope.ModuleScopeContainer.eagerIn 
itComponents(
> ModuleScopeContainer.java:153)
>     at
>  
org.apache.tuscany.core.component.scope.ModuleScopeContainer.onEvent 
(
> ModuleScopeContainer.java:68)
>     at
> org.apache.tuscany.spi.component.AbstractSCAObject.publish(
> AbstractSCAObject.java :92)
>     at
>
>  
org.apache.tuscany.core.implementation.composite.AbstractCompositeCo 
mponent.publish
> (AbstractCompositeComponent.java:178)
>     at
>
>  
org.apache.tuscany.core.implementation.composite.AbstractCompositeCo 
mponent.start(
> AbstractCompositeComponent.java:117)
>     at
>
>  
org.apache.tuscany.core.services.extension.DirectoryScanExtender.dep 
loyExtension
> (DirectoryScanExtender.java:120)
>     at
>  
org.apache.tuscany.core.services.extension.DirectoryScanExtender.ini 
t (
> DirectoryScanExtender.java:83)
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at
> sun.reflect.NativeMethodAccessorImpl.invoke(
> NativeMethodAccessorImpl.java:39)
>     at
> sun.reflect.DelegatingMethodAccessorImpl.invoke (
> DelegatingMethodAccessorImpl.java:25)
>     at java.lang.reflect.Method.invoke(Method.java:585)
>     at
> org.apache.tuscany.core.injection.MethodEventInvoker.invokeEvent(
> MethodEventInvoker.java:42)
>     ... 15 more
> Caused by: java.lang.reflect.InvocationTargetException
>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     at
> sun.reflect.NativeMethodAccessorImpl.invoke(
> NativeMethodAccessorImpl.java:39)
>     at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:25)
>     at java.lang.reflect.Method.invoke(Method.java:585)
>     at
> org.apache.tuscany.core.injection.MethodInjector.inject (
> MethodInjector.java:46)
>     ... 28 more
> Caused by: org.apache.axis2.AxisFault: ClassNotFoundException  
Error in
> loading message receivers
> org.apache.axis2.receivers.RawXMLINOnlyMessageReceiver
>     at
>
>  
org.apache.axis2.deployment.URLBasedAxisConfigurator.getAxisConfigur 
ation(
> URLBasedAxisConfigurator.java:75)
>     at
>
>  
org.apache.axis2.context.ConfigurationContextFactory.createConfigura 
tionContext
> (ConfigurationContextFactory.java:61)
>     at
>
>  
org.apache.tuscany.binding.axis2.util.TuscanyAxisConfigurator.getCon 
figurationContext(
> TuscanyAxisConfigurator.java:40)
>     at
>  
org.apache.tuscany.binding.axis2.Axis2BindingBuilder.setServletHost(
> Axis2BindingBuilder.java:49)
>     ... 33 more
>
>
>  
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