/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.impl.naming.cosnaming;

// Get CORBA type

import org.omg.CORBA.INITIALIZE;

import org.omg.CORBA.ORB;

import org.omg.CORBA.CompletionStatus;

import org.omg.CORBA.Policy;

import org.omg.CORBA.INTERNAL;

import org.omg.PortableServer.POA;

import org.omg.PortableServer.LifespanPolicyValue;

import org.omg.PortableServer.RequestProcessingPolicyValue;

import org.omg.PortableServer.IdAssignmentPolicyValue;

import org.omg.PortableServer.ServantRetentionPolicyValue;

// Get org.omg.CosNaming types

import org.omg.CosNaming.NamingContext;

// Import transient naming context

import com.sun.corba.se.impl.naming.cosnaming.TransientNamingContext;

import com.sun.corba.se.impl.orbutil.ORBConstants;

import com.sun.corba.se.spi.logging.CORBALogDomains;

import com.sun.corba.se.impl.logging.NamingSystemException;

/**

 * Class TransientNameService implements a transient name service

 * using TransientNamingContexts and TransientBindingIterators, which

 * implement the org.omg.CosNaming::NamingContext and org.omg.CosNaming::BindingIterator

 * interfaces specfied by the OMG Common Object Services Specification.

 * <p>

 * The TransientNameService creates the initial NamingContext object.

 * @see NamingContextImpl

 * @see BindingIteratorImpl

 * @see TransientNamingContext

 * @see TransientBindingIterator

 */

public class TransientNameService

{

    /**

     * Constructs a new TransientNameService, and creates an initial

     * NamingContext, whose object

     * reference can be obtained by the initialNamingContext method.

     * @param orb The ORB object

     * @exception org.omg.CORBA.INITIALIZE Thrown if

     * the TransientNameService cannot initialize.

     */

    public TransientNameService(com.sun.corba.se.spi.orb.ORB orb )

        throws org.omg.CORBA.INITIALIZE

    {

        // Default constructor uses "NameService" as the key for the Root Naming

        // Context. If default constructor is used then INS's object key for

        // Transient Name Service is "NameService"

        initialize( orb, "NameService" );

    }

    /**

     * Constructs a new TransientNameService, and creates an initial

     * NamingContext, whose object

     * reference can be obtained by the initialNamingContext method.

     * @param orb The ORB object

     * @param nameserviceName Stringified key used for INS Service registry

     * @exception org.omg.CORBA.INITIALIZE Thrown if

     * the TransientNameService cannot initialize.

     */

    public TransientNameService(com.sun.corba.se.spi.orb.ORB orb,

        String serviceName ) throws org.omg.CORBA.INITIALIZE

    {

        // This constructor gives the flexibility of providing the Object Key

        // for the Root Naming Context that is registered with INS.

        initialize( orb, serviceName );

    }

    /**

     * This method initializes Transient Name Service by associating Root

     * context with POA and registering the root context with INS Object Keymap.

     */

    private void initialize( com.sun.corba.se.spi.orb.ORB orb,

        String nameServiceName )

        throws org.omg.CORBA.INITIALIZE

    {

        NamingSystemException wrapper = NamingSystemException.get( orb,

            CORBALogDomains.NAMING ) ;

        try {

            POA rootPOA = (POA) orb.resolve_initial_references(

                ORBConstants.ROOT_POA_NAME );

            rootPOA.the_POAManager().activate();

            int i = 0;

            Policy[] poaPolicy = new Policy[3];

            poaPolicy[i++] = rootPOA.create_lifespan_policy(

                LifespanPolicyValue.TRANSIENT);

            poaPolicy[i++] = rootPOA.create_id_assignment_policy(

                IdAssignmentPolicyValue.SYSTEM_ID);

            poaPolicy[i++] = rootPOA.create_servant_retention_policy(

                ServantRetentionPolicyValue.RETAIN);

            POA nsPOA = rootPOA.create_POA( "TNameService", null, poaPolicy );

            nsPOA.the_POAManager().activate();

            // Create an initial context

            TransientNamingContext initialContext =

                new TransientNamingContext(orb, null, nsPOA);

            byte[] rootContextId = nsPOA.activate_object( initialContext );

            initialContext.localRoot =

                nsPOA.id_to_reference( rootContextId );

            theInitialNamingContext = initialContext.localRoot;

            orb.register_initial_reference( nameServiceName,

                theInitialNamingContext );

        } catch (org.omg.CORBA.SystemException e) {

            throw wrapper.transNsCannotCreateInitialNcSys( e ) ;

        } catch (Exception e) {

            throw wrapper.transNsCannotCreateInitialNc( e ) ;

        }

    }

    /**

     * Return the initial NamingContext.

     * @return the object reference for the initial NamingContext.

     */

    public org.omg.CORBA.Object initialNamingContext()

    {

        return theInitialNamingContext;

    }

    // The initial naming context for this name service

    private org.omg.CORBA.Object theInitialNamingContext;

}