package org.jacorb.poa;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 1997-2004 Gerald Brose.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.omg.CORBA.INTERNAL;
import org.omg.PortableServer.POAManagerPackage.AdapterInactive;
import org.omg.PortableServer.POAManagerPackage.State;
/**
* The poa manager class, an implementation of org.omg.PortableServer.POAManager
*
* @author Reimo Tiedemann, FU Berlin
* @version $Id: POAManager.java,v 1.16 2006/05/22 15:03:49 alphonse.bendt Exp $
*/
public class POAManager
extends org.omg.PortableServer._POAManagerLocalBase
{
public State state = State.HOLDING;
private final org.jacorb.orb.ORB orb;
private final List poas = new ArrayList();
private POAManagerMonitor monitor;
protected boolean poaCreationFailed;
protected POAManager(org.jacorb.orb.ORB _orb)
{
orb = _orb;
monitor = new POAManagerMonitorLightImpl();
try
{
monitor.configure(orb.getConfiguration());
}
catch (org.apache.avalon.framework.configuration.ConfigurationException ce)
{
// Never thrown
}
monitor.init(this);
monitor.openMonitor();
monitor.printMessage("ready");
}
public void activate() throws AdapterInactive
{
checkCreation ();
switch (state.value())
{
case State._INACTIVE :
throw new AdapterInactive();
case State._ACTIVE :
break;
default:
state = State.ACTIVE;
monitor.setToActive();
final POA [] poaArray;
synchronized (this)
{
poaArray = (POA[]) poas.toArray(new POA[poas.size()]);
}
// notify all registered poas
Thread thread = new Thread()
{
public void run()
{
for (int i=0; i<poaArray.length; i++)
{
try {
poaArray[i].changeToActive();
} catch (Throwable e) {}
}
}
};
thread.setName("POAChangeToActive");
thread.start();
}
}
public void deactivate
(boolean etherealize_objects, boolean wait_for_completion)
throws AdapterInactive
{
checkCreation ();
if (wait_for_completion && isInInvocationContext())
{
throw new org.omg.CORBA.BAD_INV_ORDER();
}
switch (state.value())
{
case State._INACTIVE :
throw new AdapterInactive();
default :
state = State.INACTIVE;
monitor.setToInactive(wait_for_completion, etherealize_objects);
final boolean etherealize = etherealize_objects;
final POA [] poaArray;
synchronized (this)
{
poaArray = (POA[]) poas.toArray(new POA[poas.size()]);
}
// notify all registered poas
Thread thread = new Thread()
{
public void run()
{
for (int i=poaArray.length-1; i>=0; i--)
{
try {
poaArray[i].changeToInactive(etherealize);
} catch (Throwable e) {}
}
}
};
thread.setName("POAChangeToInactive");
thread.start();
if (wait_for_completion)
{
try {
thread.join();
} catch (InterruptedException e) {}
}
}
}
public void discard_requests(boolean wait_for_completion)
throws AdapterInactive
{
checkCreation ();
if (wait_for_completion && isInInvocationContext())
{
throw new org.omg.CORBA.BAD_INV_ORDER();
}
switch (state.value())
{
case State._INACTIVE :
throw new AdapterInactive();
case State._DISCARDING :
break;
default :
state = State.DISCARDING;
monitor.setToDiscarding(wait_for_completion);
final POA [] poaArray;
synchronized (this)
{
poaArray = (POA[]) poas.toArray(new POA[poas.size()]);
}
// notify all registered poas
Thread thread = new Thread()
{
public void run()
{
for (int i=poaArray.length-1; i>=0; i--)
{
try {
poaArray[i].changeToDiscarding();
} catch (Throwable e) {}
}
}
};
thread.setName("POAChangeToDiscarding");
thread.start();
if (wait_for_completion)
{
try {
thread.join();
} catch (InterruptedException e) {}
}
}
}
public State get_state()
{
return state;
}
protected synchronized POA getRegisteredPOA(String name)
{
POA result;
Iterator en = poas.iterator();
while (en.hasNext())
{
result = (POA) en.next();
if (name.equals(result._getQualifiedName()))
{
return result;
}
}
throw new INTERNAL
(
"POA not registered: " +
POAConstants.ROOT_POA_NAME+
POAConstants.OBJECT_KEY_SEPARATOR+
name
);
}
public void hold_requests(boolean wait_for_completion)
throws AdapterInactive
{
checkCreation ();
if (wait_for_completion && isInInvocationContext())
{
throw new org.omg.CORBA.BAD_INV_ORDER();
}
switch (state.value())
{
case State._INACTIVE :
throw new AdapterInactive();
case State._HOLDING :
break;
default :
state = State.HOLDING;
monitor.setToHolding(wait_for_completion);
final POA [] poaArray;
synchronized (this)
{
poaArray = (POA[]) poas.toArray(new POA[poas.size()]);
}
// notify all registered poas
Thread thread = new Thread()
{
public void run()
{
for (int i=poaArray.length-1; i>=0; i--)
{
try {
poaArray[i].changeToHolding();
} catch (Throwable e) {}
}
}
};
thread.setName("POAChangeToHolding");
thread.start();
if (wait_for_completion)
{
try {
thread.join();
} catch (InterruptedException e) {}
}
}
}
/**
* it returns true if the current thread is not in an invocation
* context dispatched by some POA belonging to the same ORB as this POAManager.
*/
private boolean isInInvocationContext()
{
try
{
if (orb.getPOACurrent().getORB() == orb)
{
return true;
}
}
catch (org.omg.PortableServer.CurrentPackage.NoContext e)
{
}
return false;
}
protected synchronized void registerPOA(POA poa)
{
if (!poas.contains(poa))
{
poas.add(poa);
monitor.addPOA(poa._getQualifiedName());
}
}
protected void setMonitor(POAManagerMonitor _monitor)
{
monitor = _monitor;
}
protected synchronized void unregisterPOA(POA poa)
{
poas.remove(poa);
monitor.removePOA(poa._getQualifiedName());
}
private void checkCreation ()
{
if (poaCreationFailed)
{
throw new org.omg.CORBA.INTERNAL ("POA Creation failed; unable to deactive");
}
}
}