poapolicymediatorimpl_nr_usm.java

java1.6众多例子参考

/*
 * @(#)POAPolicyMediatorImpl_NR_USM.java	1.26 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

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();
    }
}