This is my client code:
public class Client
{
IUserService userService;
public IUserService getUserService() {
return userService;
}
public void setUserService(IUserService userService) {
this.userService = userService;
}
public void callService()
{
System.out.println("===================================================");
IUser user = userService.getUser();
System.out.println(user.getUserString());
System.out.println("===================================================");
}
public static void main(String[] args) {
try
{
Resource res = new ClassPathResource("client.xml");
BeanFactory factory = new XmlBeanFactory(res);
Client client = (Client) factory.getBean("client");
client.callService();
}
catch (Exception e1)
{
System.out.println("" + e1);
}
}
> How are you calling this at the client end?
>
> ...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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> > [email protected]
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> >
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> >
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> > 4:45 PM
> >
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