SessionFactoryServant.java

package test.servantscaling;

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

public class SessionFactoryServant
    extends SessionFactoryPOA
{
    private ORB orb;
    private POA poaList[];
    private POA currentPoa;
    private byte [][] objectIds;

    private int poa_kind = 0;
    private int nextId = 0;

    private SessionServant defServant;

    public class SessionLocator extends _ServantLocatorLocalBase {
	public void postinvoke(byte[] oid,
                               POA adapter,
                               String operation,
                               java.lang.Object the_cookie,
                               Servant the_servant)
        {
        }

	public Servant preinvoke(byte[] oid,
                                 POA adapter,
                                 String operation,
                                 CookieHolder the_cookie)
            throws org.omg.PortableServer.ForwardRequest {
            return defServant;
        }
    }

    public class SessionActivator extends _ServantActivatorLocalBase {
	public Servant incarnate(byte[] oid, POA adapter) throws ForwardRequest {
            objectIds[nextId++] = oid;
            return new SessionServant(oid);
        }

	public void etherealize(byte[] oid,
                         POA adapter,
                         Servant serv,
                         boolean cleanup_in_progress,
                         boolean remaining_activations)
        {
        }
    }

    public SessionFactoryServant( ORB orb)
    {
        try {
            this.orb = orb;

            org.omg.PortableServer.Current current =
                org.omg.PortableServer.CurrentHelper.narrow(orb.resolve_initial_references("POACurrent"));

            defServant = new SessionServant(current);
            ServantManager locator = new SessionLocator();
            ServantManager activator = new SessionActivator();

            POA rootPOA =
                POAHelper.narrow(orb.resolve_initial_references("RootPOA"));
            poaList = new POA[4];
            Policy userIdPolicy =
                rootPOA.create_id_assignment_policy (IdAssignmentPolicyValue.USER_ID);
            Policy multiIdPolicy =
                rootPOA.create_id_uniqueness_policy (IdUniquenessPolicyValue.MULTIPLE_ID);
            Policy retainPolicy =
                rootPOA.create_servant_retention_policy (ServantRetentionPolicyValue.NON_RETAIN);
            Policy defServPolicy =
                rootPOA.create_request_processing_policy (RequestProcessingPolicyValue.USE_DEFAULT_SERVANT);

            Policy servMangPolicy =
                rootPOA.create_request_processing_policy (RequestProcessingPolicyValue.USE_SERVANT_MANAGER);

            poaList[0] = rootPOA.create_POA ("sysId",
                                             rootPOA.the_POAManager(),
                                             new Policy[] {multiIdPolicy});
            poaList[1] = rootPOA.create_POA ("userId",
                                             rootPOA.the_POAManager(),
                                             new Policy[] {userIdPolicy, multiIdPolicy});
            poaList[2] = rootPOA.create_POA ("defserv",
                                             rootPOA.the_POAManager(),
                                             new Policy[]
                {userIdPolicy, multiIdPolicy, defServPolicy, retainPolicy});
            poaList[2].set_servant (defServant);

            poaList[3] = rootPOA.create_POA ("servloc",
                                         rootPOA.the_POAManager(),
                                         new Policy[]
            {userIdPolicy, multiIdPolicy, servMangPolicy});
        poaList[3].set_servant_manager (activator);
        } catch (Exception e) {
            e.printStackTrace();
        }
        currentPoa = poaList[0];
    }

    private void kill_old_ids () {
        if (objectIds == null)
            return;
        try {
            System.out.println ("deactivating " + objectIds.length + " objects");
            for (int i = 0; i < nextId; i++)
                currentPoa.deactivate_object (objectIds[i]);
        } catch (Exception ex) {}
        nextId = 0;
        objectIds = null;
    }

    public void set_poa (POA_Kind kind) {
        kill_old_ids();
        poa_kind = kind.value();
        currentPoa = poaList[poa_kind];
        System.out.println ("now using poa " + currentPoa.the_name());
    }

    public void create_sessions(int count)
    {
        kill_old_ids();
        try {
            if (poa_kind != 2)
                objectIds = new byte[count][];

            if (poa_kind > 1)
                return;  // nothing to do references returned on demand

            for (nextId = 0; nextId < count; nextId++) {
                byte objId[];
                SessionServant servant = new SessionServant();
                if (poa_kind == 1) {
                    objId = ("object " + Integer.toString(nextId)).getBytes();
                    currentPoa.activate_object_with_id(objId,defServant);
                } else
                    objId = currentPoa.activate_object (servant);
                servant.setID(objId);
                objectIds[nextId] = objId;
            }
        }
        catch( Throwable e ) {
            System.out.println ("Error activating objectID " + nextId);
            e.printStackTrace();
            throw new org.omg.CORBA.UNKNOWN();
        }
    }

    public Session get_session (int index)
    {
        try {
            org.omg.CORBA.Object obj = poa_kind < 2 ?
                currentPoa.id_to_reference(objectIds[index]) :
                currentPoa.create_reference_with_id (("object " + Integer.toString(index)).getBytes(),"IDL:test/serventscaling/Session:1.0");
            return SessionHelper.narrow(obj);
        } catch (Exception e) {
            e.printStackTrace();
            throw new org.omg.CORBA.UNKNOWN();
        }
    }

}