RE: a question about rmi sample

Uh uh, yes, that may be true. We probably need to subclass
ObjectOutput/InputStream in order to fix that. It's not very hard, but
it takes some additional work.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
yiming wang
Sent: den 5 juni 2003 09:22
To: [email protected]
Subject: Re: [Nanning-developer] a question about rmi sample

hi jon,

Every thing is ok now!
i can use "MyObject" in client side, any operation on 
that object will be result at server side.

more step, i meet another problem:

In MyStatelessService.java, add following codes
public Collection getAllObjects();

then in MyStatelessServiceImpl.java
public Collection getAllObjects() {
		return
((MySystem)CurrentPrevayler.getSystem()).getAllObjects();
	}

test code:
Collection col = myService.getAllObjects();
for (Iterator it = col.iterator(); it.hasNext();) {
    MyObject o2 = (MyObject)it.next();
    String v2 = o2.getValue();
    System.out.println("value: " + v2);
}

run test case with "java -ea", but throws following
exception:
java.lang.ClassCastException
	at
com.tirsen.nanning.samples.rmi.RemoteAspect.invoke(RemoteAspect.java:21)
	at
com.tirsen.nanning.MixinInstance$InvocationImpl.invokeNext(MixinInstance
.java:96)
	at
com.tirsen.nanning.MixinInstance.invokeMethod(MixinInstance.java:164)
	at
com.tirsen.nanning.AspectInstance.invoke(AspectInstance.java:96)
	at $Proxy2.getValue(Unknown Source)
	at
com.tirsen.nanning.samples.rmi.RemoteCallServerTest.testStatelessRemoteC
all(RemoteCallServerTest.java:90)
....

MyObject has been already add @remote tag, but when 
they in a Collection, they can't be marshal as remote 
stub, is it current restrict? any solution to resolve
such requirement?

thanks again!

--- Jon Tirsén <[email protected]> wrote:
> Ni hao!
> 
> Try to make sure that the attributes really are
> loaded, for example do:
> assertTrue(Attributes.hasAttribute(MyObject.class,
> "remote"));
> 
> Also try to execute java with asserts enabled, ie:
> "java -ea". You may get a different more helpful
> error-message.
> 
> If this doesn't help you either I need to look
> deeper
> into the problem. I can to that later this weekend.
> 
>  --- yiming wang <[email protected]> skrev: >
> &#21776;&#26480;&#65306;
> >     &#20320;&#22909;&#65281;
> >     Firstly, i wish your speach on Nanning will
> get
> > successful.
> > 
> >     I am sure the attributes are correct, because
> > the 
> > other test cases can pass with no problem.
> > 
> >     As your said:
> >     "Basically the framework doesn't know that it
> > should
> >     marshal this object as a client stub and
> > therefor 
> >     the object is incorrect on the client side."
> > 
> >     I guess that it is usage of aspect instance in
> 
> > client side, may be not a bug. so, how to declare 
> > "MyObject.java" then it can be marshal as a client
> > stub?
> > 
> >     i have been add @remote and @service tag to
> > "MyObject.java", but not work.
> > 
> > &#29579;&#20134;&#26126;
> > 2003.6.3
> > 
> > --- Jon Tirsén <[email protected]> wrote:
> > > I am currently in London and using an internet
> > cafe
> > > to
> > > answer. Therefor I don't have access to the code
> > and
> > > can't verify this. But...
> > > 
> > > I think you haven't compiled the attributes or
> > > haven't
> > > included them in the classpath or haven't added
> it
> > > to
> > > the search-path with Attributes.addSearchPath.
> > > Basically the framework doesn't know that it
> > should
> > > marshal this object as a client stub and
> therefor
> > > the
> > > object is incorrect on the client side.
> > > 
> > > If the error persists please answer back and I
> > will
> > > try to have a closer look at this when I get
> back
> > > from
> > > London.
> > > 
> > > Btw, if any of you guys are in London tomorrow
> > > evening
> > > come by XTC. I will be there and might give an
> > > improvised speach on Nanning. See
> > > www.xpdeveloper.com
> > > 
> > > Tip: If you execute Nanning with assertions
> > enabled
> > > (using java -ea) better error-messages will
> > appear.
> > > 
> > > tang jie
> > > 
> > >  --- yiming wang <[email protected]> skrev: > hi
> > jon,
> > > > 
> > > > In MyStatelessService.java, add following
> codes:
> > > > 
> > > > 	public MyObject getMyObject();
> > > > 
> > > > then, in MyStatelessServiceImpl.java:
> > > > 
> > > > 	public MyObject getMyObject() {
> > > >     	    return
> > > >
> > >
> >
>
((MySystem)CurrentPrevayler.getSystem()).getMyObject();
> > > >         }
> > > > 
> > > > finally, in RemoteCallServerTest.java, add
> > > following
> > > > test codes:
> > > > 
> > > > 	MyObject myObject = myService.getMyObject();
> > > >         String value = myObject.getValue();
> > > > 
> > > > when i run the test case, throws the following
> > > > exception:
> > > > 
> > > > java.lang.ClassCastException
> > > > 	at
> > > >
> > >
> >
>
com.tirsen.nanning.samples.rmi.RemoteAspect.invoke(RemoteAspect.java:21)
> > > > 	at
> > > >
> > >
> >
>
com.tirsen.nanning.MixinInstance$InvocationImpl.invokeNext(MixinInstance
.java:96)
> > > > 	at
> > > >
> > >
> >
>
com.tirsen.nanning.MixinInstance.invokeMethod(MixinInstance.java:164)
> > > > 	at
> > > >
> > >
> >
>
com.tirsen.nanning.AspectInstance.invoke(AspectInstance.java:96)
> > > > 	at $Proxy2.getValue(Unknown Source)
> > > > 	at
> > > >
> > >
> >
>
com.tirsen.nanning.samples.rmi.RemoteCallServerTest.testStatelessRemoteC
all(RemoteCallServerTest.java:77)
> > > > 	at
> > > >
> > >
> >
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> > > > Method)
> > > > 	at
> > > >
> > >
> >
>
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)
> > > > 	at
> > > >
> > >
> >
>
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)
> > > > 	at
> > > java.lang.reflect.Method.invoke(Method.java:324)
> > > > 	at
> > > >
> > >
> >
> junit.framework.TestCase.runTest(TestCase.java:154)
> > > > 	at
> > > >
> > >
> >
> junit.framework.TestCase.runBare(TestCase.java:127)
> > > > 	at
> > > >
> > >
> >
>
junit.framework.TestResult$1.protect(TestResult.java:106)
> > > > 	at
> > > >
> > >
> >
>
junit.framework.TestResult.runProtected(TestResult.java:124)
> > > > 	at
> > > >
> > >
> >
> junit.framework.TestResult.run(TestResult.java:109)
> > > > 	at
> > > junit.framework.TestCase.run(TestCase.java:118)
> > > > 	at
> > > >
> > >
> >
>
junit.framework.TestSuite.runTest(TestSuite.java:208)
> > > > 	at
> > > >
> > junit.framework.TestSuite.run(TestSuite.java:203)
> > > > ......
> > > > 
> > > > how to resolve such problem?
> > > > 
> > > > i have two scenarios:
> > > > 1. at client, i only use MyObject to get Data,
> > not
> 
=== message truncated ===


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