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Java example source code file (POAPolicyMediatorBase_R.java)

This example Java source code file (POAPolicyMediatorBase_R.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

activeobjectmap, aomentry, calling, exiting, objectalreadyactive, objectnotactive, poafactory, poamanagerimpl, poapolicymediatorbase_r, policies, servant, servantalreadyactive, servantnotactive, wrongpolicy

The POAPolicyMediatorBase_R.java Java example source code

/*
 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
 * 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
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.corba.se.impl.oa.poa ;

import org.omg.PortableServer.Servant ;

import org.omg.PortableServer.POAPackage.WrongPolicy ;
import org.omg.PortableServer.POAPackage.ServantNotActive ;
import org.omg.PortableServer.POAPackage.ServantAlreadyActive ;
import org.omg.PortableServer.POAPackage.ObjectNotActive ;
import org.omg.PortableServer.POAPackage.ObjectAlreadyActive ;

import com.sun.corba.se.impl.orbutil.concurrent.SyncUtil ;

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

import com.sun.corba.se.impl.javax.rmi.CORBA.Util ;

import com.sun.corba.se.impl.oa.NullServantImpl ;

public abstract class POAPolicyMediatorBase_R extends POAPolicyMediatorBase {
    protected ActiveObjectMap activeObjectMap ;

    POAPolicyMediatorBase_R( Policies policies, POAImpl poa )
    {
        super( policies, poa ) ;

        // assert policies.retainServants() && policies.useActiveObjectMapOnly()
        if (!policies.retainServants())
            throw poa.invocationWrapper().policyMediatorBadPolicyInFactory() ;

        activeObjectMap = ActiveObjectMap.create(poa, !isUnique);
    }

    public void returnServant()
    {
        // NO-OP
    }

    public void clearAOM()
    {
        activeObjectMap.clear() ;
        activeObjectMap = null ;
    }

    protected Servant internalKeyToServant( ActiveObjectMap.Key key )
    {
        AOMEntry entry = activeObjectMap.get(key);
        if (entry == null)
            return null ;

        return activeObjectMap.getServant( entry ) ;
    }

    protected Servant internalIdToServant( byte[] id )
    {
        ActiveObjectMap.Key key = new ActiveObjectMap.Key( id ) ;
        return internalKeyToServant( key ) ;
    }

    protected void activateServant( ActiveObjectMap.Key key, AOMEntry entry, Servant servant )
    {
        setDelegate(servant, key.id );

        if (orb.shutdownDebugFlag) {
            System.out.println("Activating object " + servant +
                " with POA " + poa);
        }

        activeObjectMap.putServant( servant, entry ) ;

        if (Util.isInstanceDefined()) {
            POAManagerImpl pm = (POAManagerImpl)poa.the_POAManager() ;
            POAFactory factory = pm.getFactory() ;
            factory.registerPOAForServant(poa, servant);
        }
    }

    public final void activateObject(byte[] id, Servant servant)
        throws WrongPolicy, ServantAlreadyActive, ObjectAlreadyActive
    {
        if (isUnique && activeObjectMap.contains(servant))
            throw new ServantAlreadyActive();
        ActiveObjectMap.Key key = new ActiveObjectMap.Key( id ) ;

        AOMEntry entry = activeObjectMap.get( key ) ;

        // Check for an ObjectAlreadyActive error
        entry.activateObject() ;
        activateServant( key, entry, servant ) ;
    }

    public Servant deactivateObject( byte[] id )
        throws ObjectNotActive, WrongPolicy
    {
        ActiveObjectMap.Key key = new ActiveObjectMap.Key( id ) ;
        return deactivateObject( key ) ;
    }

    protected void deactivateHelper( ActiveObjectMap.Key key, AOMEntry entry,
        Servant s ) throws ObjectNotActive, WrongPolicy
    {
        // Default does nothing, but the USE_SERVANT_MANAGER case
        // must handle etherealization

        activeObjectMap.remove(key);

        if (Util.isInstanceDefined()) {
            POAManagerImpl pm = (POAManagerImpl)poa.the_POAManager() ;
            POAFactory factory = pm.getFactory() ;
            factory.unregisterPOAForServant(poa, s);
        }
    }

    public Servant deactivateObject( ActiveObjectMap.Key key )
        throws ObjectNotActive, WrongPolicy
    {
        if (orb.poaDebugFlag) {
            ORBUtility.dprint( this,
                "Calling deactivateObject for key " + key ) ;
        }

        try {
            AOMEntry entry = activeObjectMap.get(key);
            if (entry == null)
                throw new ObjectNotActive();

            Servant s = activeObjectMap.getServant( entry ) ;
            if (s == null)
                throw new ObjectNotActive();

            if (orb.poaDebugFlag) {
                System.out.println("Deactivating object " + s + " with POA " + poa);
            }

            deactivateHelper( key, entry, s ) ;

            return s ;
        } finally {
            if (orb.poaDebugFlag) {
                ORBUtility.dprint( this,
                    "Exiting deactivateObject" ) ;
            }
        }
    }

    public byte[] servantToId( Servant servant ) throws ServantNotActive, WrongPolicy
    {
        // XXX needs to handle call from an invocation on this POA

        if (!isUnique && !isImplicit)
            throw new WrongPolicy();

        if (isUnique) {
            ActiveObjectMap.Key key = activeObjectMap.getKey(servant);
            if (key != null)
                return key.id ;
        }

        // assert !isUnique || (servant not in activateObjectMap)

        if (isImplicit)
            try {
                byte[] id = newSystemId() ;
                activateObject( id, servant ) ;
                return id ;
            } catch (ObjectAlreadyActive oaa) {
                // This can't occur here, since id is always brand new.
                throw poa.invocationWrapper().servantToIdOaa( oaa ) ;
            } catch (ServantAlreadyActive s) {
                throw poa.invocationWrapper().servantToIdSaa( s ) ;
            } catch (WrongPolicy w) {
                throw poa.invocationWrapper().servantToIdWp( w ) ;
            }

        throw new ServantNotActive();
    }
}

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