org.omg.PortableServer

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1. Creating a Portable Server

import org.omg.PortableServer.*;
import org.omg.PortableServer.POAManagerPackage.*;

public class POAServer {
    public static void main(String[] args) {
        try {
            POA poa = POAHelper.init(new POAManager[0]);
            poa.the_POAManager().activate();
            System.out.println("Server is ready to accept requests.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2. Creating a Servant

import org.omg.PortableServer.*;
import org.omg.CORBA.*;

public class Servant extends PortableServer.Servant {
    public void operation() {
        // Implementation of the operation
    }
}

3. Registering a Servant with a POA

import org.omg.PortableServer.*;
import org.omg.CORBA.*;

public class RegisterServant {
    public static void main(String[] args) {
        POA poa = POAHelper.init(new POAManager[0]);
        ObjectRef ref = poa.servant_to_reference(new Servant());
        System.out.println("Servant reference: " + ref.value());
    }
}

4. Activating a POA

import org.omg.PortableServer.*;
import org.omg.PortableServer.POAManagerPackage.*;

public class ActivatePOA {
    public static void main(String[] args) {
        POA poa = POAHelper.init(new POAManager[0]);
        try {
            poa.the_POAManager().activate();
            System.out.println("POA is now active.");
        } catch (AdapterInactive aie) {
            System.out.println("POA is already active.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

5. Deactivating a POA

import org.omg.PortableServer.*;
import org.omg.PortableServer.POAManagerPackage.*;

public class DeactivatePOA {
    public static void main(String[] args) {
        POA poa = POAHelper.init(new POAManager[0]);
        try {
            poa.the_POAManager().deactivate(true);
            System.out.println("POA is now inactive.");
        } catch (AdapterInactive aie) {
            System.out.println("POA is already inactive.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

6. Obtaining a POA Manager

import org.omg.PortableServer.*;
import org.omg.PortableServer.POAManagerPackage.*;

public class GetPOAManager {
    public static void main(String[] args) {
        POA poa = POAHelper.init(new POAManager[0]);
        POAManager manager = poa.the_POAManager();
        System.out.println("POA Manager: " + manager);
    }
}

7. Getting a Servant's Object Reference

import org.omg.PortableServer.*;
import org.omg.CORBA.*;

public class GetServantRef {
    public static void main(String[] args) {
        POA poa = POAHelper.init(new POAManager[0]);
        Servant servant = new Servant();
        ObjectRef ref = poa.servant_to_reference(servant);
        System.out.println("Servant reference: " + ref.value());
    }
}

8. Creating a Remote Object Reference

import org.omg.PortableServer.POAPackage.*;
import org.omg.CORBA.*;

public class CreateRemoteRef {
    public static void main(String[] args) {
        String host = "localhost";
        int port = 1050;
        String objectKey = "MyObject";
        String ref = "corbaloc:iiop:localhost:1050/MyObject";
        try {
            ORB orb = ORB.init(args, null);
            org.omg.CORBA.Object obj = orb.resolve_initial_references("RootPOA");
            POAManager manager = org.omg.PortableServer.POAManagerHelper.narrow(obj);
            ServerAddress addr = new ServerAddress(host, port);
            ServerAddress[] addrs = new ServerAddress[]{addr};
            ServerLocation[] locs = new ServerLocation[addrs.length];
            for (int i = 0; i < addrs.length; i++) {
                locs[i] = new ServerLocation(addrs[i]);
            }
            ObjectID objID = new ObjectID(objectKey);
            ObjectReferenceTemplate tmpl = new ObjectReferenceTemplate(locs, objID);
            ObjectRef refObj = manager.create_reference_with_id(tmpl);
            System.out.println("Remote object reference: " + refObj.value());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

9. Creating a Servant Object

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
import org.omg.CORBA.ORB;

public class CreateServant {
    public static void main(String[] args) {
        try {
            ORB orb = ORB.init(args, null);
            POA rootPOA = (POA) orb.resolve_initial_references("RootPOA");
            Servant servant = new Servant();
            rootPOA.activate_object(servant);
            org.omg.CORBA.Object objRef = rootPOA.servant_to_reference(servant);
            System.out.println("Servant object reference: " + objRef.value());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

10. Resolving a Servant Object by Reference

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
import org.omg.CORBA.ORB;
import org.omg.CORBA.Object;

public class ResolveServant {
    public static void main(String[] args) {
        try {
            ORB orb = ORB.init(args, null);
            POA rootPOA = (POA) orb.resolve_initial_references("RootPOA");
            String ref = "corbaloc:iiop:localhost:1050/MyObject";
            org.omg.CORBA.Object objRef = orb.string_to_object(ref);
            Servant servant = rootPOA.reference_to_servant(objRef);
            System.out.println("Resolved servant: " + servant);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

11. Activating a Servant in a POA

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;

public class ActivateServant {
    public static void main(String[] args) {
        try {
            POA poa = POAHelper.init(new POAManager[0]);
            Servant servant = new Servant();
            poa.activate_object(servant);
            System.out.println("Servant activated in POA.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

12. Deactivating a Servant in a POA

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;

public class DeactivateServant {
    public static void main(String[] args) {
        try {
            POA poa = POAHelper.init(new POAManager[0]);
            Servant servant = new Servant();
            poa.deactivate_object(servant);
            System.out.println("Servant deactivated in POA.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

13. Getting a POA from the ORB

import org.omg.PortableServer.POA;
import org.omg.CORBA.ORB;

public class GetPOAFromORB {
    public static void main(String[] args) {
        try {
            ORB orb = ORB.init(args, null);
            POA poa = (POA) orb.resolve_initial_references("RootPOA");
            System.out.println("POA obtained from ORB: " + poa);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

14. Registering a Server with the ORB

import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant