The main idea is to hide UserImpl from client side completely. I can believe
you that pojos transporting works just fine, but that's not what I need )
> I do this, but not with interfaces...
>
> I use hessian to return pojo's just fine.
>
> From the examples, pojo's are usually not interfaces in spring, rather
> the services/dao are interfaces. Do you need user to be an interface?
>
> I have a user service that I implemented with hessian/spring/hibernate.
> Can I ask a little more about your project?
>
> Phillip
>
> ...y ...ich wrote:
>
> >Greeting,
> >
> >I want to implement a simple client-server application with the following
> >feature: client receives some remote object and call it's method. I don't
> >have an intention to use EJBs so my question if this possible with pure
> >Spring Remoting features like Hessian.
> >
> >The remote object that is being passed is
> >
> >Code:
> >
> >import interfaces.IUser;
> >
> >public class UserImpl implements IUser
> >{
> >
> > public String getAge() {
> >
> > return " 27 y.o ";
> > }
> >
> > public String getName()
> > {
> > return " John Doe ";
> > }
> >
> > public String getSex()
> > {
> > return " M ";
> > }
> >
> > public String getUserString() {
> >
> > return getName() + getAge() + getSex();
> > }
> >
> >}
> >
> >The client side has only IUser in its classpath, not UserImpl. So when I
> >call Hessian Service, I receive en error like this
> >
> >Code:
> >
> >java.lang.InstantiationException: interfaces.IUser
> > at java.lang.Class.newInstance0(Unknown Source)
> > at java.lang.Class.newInstance(Unknown Source)
> > at
> > com.caucho.hessian.io.JavaDeserializer.instantiate(JavaDeserializer.java:172)
> > at
> > com.caucho.hessian.io.JavaDeserializer.readMap(JavaDeserializer.java:112)
> > at com.caucho.hessian.io.HessianInput.readObject(HessianInput.java:662)
> > at com.caucho.hessian.io.HessianInput.readReply(HessianInput.java:241)
> > at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:179)
> > at $Proxy0.getUser(Unknown Source)
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> > at java.lang.reflect.Method.invoke(Unknown Source)
> > at
> > org.springframework.remoting.caucho.HessianClientInterceptor.invoke(HessianClientInterceptor.java:163)
> > at
> > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
> > at
> > org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:210)
> > at $Proxy1.getUser(Unknown Source)
> > at client.Client.callService(Client.java:39)
> > at client.Client.main(Client.java:56)
> >
> >
> >I haven't looked at Hessian source code, but I could presume that it tries
> >to instantiate UserImpl on the client side, where such class is absent in
> >the classpath.
> >
> >
> >Can I configure Hessian somehow to send UserImpl class information with
> >serialized UserImpl object?
> >
> >Thanks in advance!
> >
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> >
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