CORBA Example Hello

Hello.idl

// file Hello.idl
module HelloApp{
  interface Hello{
    string sayHello();
  };
};

import HelloApp.*;
import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;

public class HelloClient 
{
    public static void main(String args[])
    {
	try{
	    // create and initialize the ORB
	    ORB orb = ORB.init(args, null);

            // get the root naming context
            org.omg.CORBA.Object objRef = 
		orb.resolve_initial_references("NameService");
            NamingContext ncRef = NamingContextHelper.narrow(objRef);
 
            // resolve the Object Reference in Naming
            NameComponent nc = new NameComponent("Hello", "");
            NameComponent path[] = {nc};
            Hello helloRef = HelloHelper.narrow(ncRef.resolve(path));

	    // call the Hello server object and print results
	    String Hello = helloRef.sayHello();
	    System.out.println(Hello);

	} catch (Exception e) {
	    System.out.println("ERROR : " + e) ;
	    e.printStackTrace(System.out);
	}
    }
}

/*
 * File: ./HelloApp/_HelloStub.java
 * From: Hello.idl
 * Date: Sat Jan 10 20:18:06 1998
 *   By: idltojava Java IDL 1.2 Nov 12 1997 12:23:47
 */

package HelloApp;
public class _HelloStub
	extends org.omg.CORBA.portable.ObjectImpl
    	implements HelloApp.Hello {

    public _HelloStub(org.omg.CORBA.portable.Delegate d) {
          super();
          _set_delegate(d);
    }

    private static final String _type_ids[] = {
        "IDL:HelloApp/Hello:1.0"
    };

    public String[] _ids() { return (String[]) _type_ids.clone(); }

    //	IDL operations
    //	    Implementation of ::HelloApp::Hello::sayHello
    public String sayHello()
 {
           org.omg.CORBA.Request r = _request("sayHello");
           r.set_return_type(org.omg.CORBA.ORB.init().get_primitive_tc(org.omg.CORBA.TCKind.tk_string));
           r.invoke();
           String __result;
           __result = r.return_value().extract_string();
           return __result;
   }

};

/*
 * File: ./HelloApp/Hello.java
 * From: Hello.idl
 * Date: Sat Jan 10 20:18:06 1998
 *   By: idltojava Java IDL 1.2 Nov 12 1997 12:23:47
 */

package HelloApp;
public interface Hello
    extends org.omg.CORBA.Object {
    String sayHello()
;
}

/*
 * File: ./HelloApp/_HelloImplBase.java
 * From: Hello.idl
 * Date: Sat Jan 10 20:18:06 1998
 *   By: idltojava Java IDL 1.2 Nov 12 1997 12:23:47
 */

package HelloApp;
public abstract class _HelloImplBase extends org.omg.CORBA.DynamicImplementation implements HelloApp.Hello {
    // Constructor
    public _HelloImplBase() {
         super();
    }
    // Type strings for this class and its superclases
    private static final String _type_ids[] = {
        "IDL:HelloApp/Hello:1.0"
    };

    public String[] _ids() { return (String[]) _type_ids.clone(); }

    private static java.util.Dictionary _methods = new java.util.Hashtable();
    static {
      _methods.put("sayHello", new java.lang.Integer(0));
     }
    // DSI Dispatch call
    public void invoke(org.omg.CORBA.ServerRequest r) {
       switch (((java.lang.Integer) _methods.get(r.op_name())).intValue()) {
           case 0: // HelloApp.Hello.sayHello
              {
              org.omg.CORBA.NVList _list = _orb().create_list(0);
              r.params(_list);
              String ___result;
                            ___result = this.sayHello();
              org.omg.CORBA.Any __result = _orb().create_any();
              __result.insert_string(___result);
              r.result(__result);
              }
              break;
            default:
              throw new org.omg.CORBA.BAD_OPERATION(0, org.omg.CORBA.CompletionStatus.COMPLETED_MAYBE);
       }
 }
}

import HelloApp.*;

import org.omg.CosNaming.*;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CORBA.*;

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

public class HelloServer {

    public static void main(String args[])
    {
	try{
	    // create and initialize the ORB
	    ORB orb = ORB.init(args, null);

	    // create 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);
	}
    }
}