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Java example source code file (POAPolicyMediatorImpl_NR_USM.java)

This example Java source code file (POAPolicyMediatorImpl_NR_USM.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

cookieholder, noservant, objectalreadyactive, objectnotactive, poaimpl, poapolicymediatorbase, poapolicymediatorimpl_nr_usm, servant, servantalreadyactive, servantlocator, servantmanager, servantnotactive, string, util, wrongpolicy

The POAPolicyMediatorImpl_NR_USM.java Java example source code

/*
 * Copyright (c) 2002, 2003, 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 java.util.Enumeration ;

import org.omg.PortableServer.POA ;
import org.omg.PortableServer.Servant ;
import org.omg.PortableServer.ServantManager ;
import org.omg.PortableServer.ServantLocator ;
import org.omg.PortableServer.ForwardRequest ;
import org.omg.PortableServer.POAPackage.NoServant ;
import org.omg.PortableServer.POAPackage.WrongPolicy ;
import org.omg.PortableServer.POAPackage.ObjectNotActive ;
import org.omg.PortableServer.POAPackage.ServantNotActive ;
import org.omg.PortableServer.POAPackage.ObjectAlreadyActive ;
import org.omg.PortableServer.POAPackage.ServantAlreadyActive ;
import org.omg.PortableServer.ServantLocatorPackage.CookieHolder ;

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

/** Implementation of POARequesHandler that provides policy specific
 * operations on the POA.
 */
public class POAPolicyMediatorImpl_NR_USM extends POAPolicyMediatorBase {
    private ServantLocator locator ;

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

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

        if (!policies.useServantManager())
            throw poa.invocationWrapper().policyMediatorBadPolicyInFactory() ;

        locator = null ;
    }

    protected java.lang.Object internalGetServant( byte[] id,
        String operation ) throws ForwardRequest
    {
        if (locator == null)
            throw poa.invocationWrapper().poaNoServantManager() ;

        CookieHolder cookieHolder = orb.peekInvocationInfo().getCookieHolder() ;

        // Try - finally is J2EE requirement.
        java.lang.Object servant;
        try{
            poa.unlock() ;

            servant = locator.preinvoke(id, poa, operation, cookieHolder);
            if (servant == null)
                servant = new NullServantImpl( poa.omgInvocationWrapper().nullServantReturned() ) ;
            else
                setDelegate( (Servant)servant, id);
        } finally {
            poa.lock() ;
        }

        return servant;
    }

    public void returnServant()
    {
        OAInvocationInfo info = orb.peekInvocationInfo();
        if (locator == null)
            return;

        try {
            poa.unlock() ;
            locator.postinvoke(info.id(), (POA)(info.oa()),
                info.getOperation(), info.getCookieHolder().value,
                (Servant)(info.getServantContainer()) );
        } finally {
            poa.lock() ;
        }
    }

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

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

    public ServantManager getServantManager() throws WrongPolicy
    {
        return locator ;
    }

    public void setServantManager( ServantManager servantManager ) throws WrongPolicy
    {
        if (locator != null)
            throw poa.invocationWrapper().servantManagerAlreadySet() ;

        if (servantManager instanceof ServantLocator)
            locator = (ServantLocator)servantManager;
        else
            throw poa.invocationWrapper().servantManagerBadType() ;
    }

    public Servant getDefaultServant() throws NoServant, WrongPolicy
    {
        throw new WrongPolicy();
    }

    public void setDefaultServant( Servant servant ) throws WrongPolicy
    {
        throw new WrongPolicy();
    }

    public final void activateObject(byte[] id, Servant servant)
        throws WrongPolicy, ServantAlreadyActive, ObjectAlreadyActive
    {
        throw new WrongPolicy();
    }

    public Servant deactivateObject( byte[] id ) throws ObjectNotActive, WrongPolicy
    {
        throw new WrongPolicy();
    }

    public byte[] servantToId( Servant servant ) throws ServantNotActive, WrongPolicy
    {
        throw new WrongPolicy();
    }

    public Servant idToServant( byte[] id )
        throws WrongPolicy, ObjectNotActive
    {
        throw new WrongPolicy();
    }
}

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