Getting Started with Java IDL:Developing the Hello World Server

[oll3i]

i m trying to write a hello world server but i get the following 3 errors
cd u please help me

javac HelloServer.jav a HelloApp/*.java
HelloServer.jav a:52: cannot find symbol
symbol: class _HelloImplBase
class HelloServant extends _HelloImplBase
^
HelloServer.jav a:26: connect(org.omg .CORBA.Object) in org.omg.CORBA.O RB cannot b
e applied to (HelloServant)
orb.connect(hel loRef);
^
HelloServer.jav a:35: rebind(org.omg. CosNaming.NameC omponent[],org.omg.CORBA. Obje
ct) in org.omg.CosNami ng.NamingContex tOperations cannot be applied to (org.omg.C
osNaming.NameCo mponent[],HelloServant)
ncRef.rebind(pa th, helloRef);
^
Note: HelloApp\HelloP OA.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
3 errors

[oll3i]

and the hello server looks like this

// The package containing our stubs.
import HelloApp.*;

// HelloServer will use the naming service.
import org.omg.CosNaming.*;

// The package containing special exceptions thrown by the name service.
import org.omg.CosNaming.NamingContextPackage.*;

// All CORBA applications need these classes.
import org.omg.CORBA.*;



public class HelloServer 
{
  public static void main(String args[])
  {
    try{
    
      // Create and initialize the ORB
      ORB orb = ORB.init(args, null);
      
      // Create the servant and register it with the ORB
      HelloServant helloRef = new HelloServant();
      orb.connect(helloRef);
      
      // Get the root naming context
      org.omg.CORBA.Object objRef = orb.resolve_initial_references("NameService");
      NamingContext ncRef = NamingContextHelper.narrow(objRef);
      
      // Bind the object reference in naming
      NameComponent nc = new NameComponent("Hello", " ");
      NameComponent path[] = {nc};
      ncRef.rebind(path, helloRef);
      
      // Wait for invocations from clients
      java.lang.Object sync = new java.lang.Object();
      synchronized(sync){
        sync.wait();
      }
      
    } catch(Exception e) {
        System.err.println("ERROR: " + e);
        e.printStackTrace(System.out);
      }  
  }
}



class HelloServant extends _HelloImplBase
{
  public String sayHello()
  {
    return "\nHello world!!\n";
  
  }
}

[oll3i]

idlj -fall Hello.idl didnt generate the _HelloImplBase. java

[vijayflex]

Instead of trying "idlj -fall Hello.idl" command try this command "idlj -fall -oldImplBase -keep Hello.idl". This command will generate _HelloImplBase. java. Then go to HelloServer.jav a --->> add one more empty member function to the class "HelloServa nt"
public void shutdown()
{

}
Hope this will help. :-)