package org.jacorb.notification;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 1997-2014 Gerald Brose / The JacORB Team.
*
* 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.Collections;
import java.util.Iterator;
import java.util.List;
import org.slf4j.Logger;
import org.jacorb.notification.util.LogUtil;
import org.omg.CosNotification.EventType;
import org.omg.CosNotifyComm.InvalidEventType;
import org.omg.CosNotifyComm.NotifyPublishOperations;
/**
* Utility class that manages subscriptions of NotifyPublishers and broadcasting of offer_change requests.
*
* @author Alphonse Bendt
*/
public class OfferManager extends EventTypeSet implements NotifyPublishOperations
{
public static final OfferManager NULL_MANAGER = new OfferManager(Collections.EMPTY_LIST);
private final List listeners_;
private final Logger logger_ = LogUtil.getLogger(getClass().getName());
public OfferManager()
{
this(new ArrayList());
}
private OfferManager(List list)
{
listeners_ = list;
}
////////////////////////////////////////
public void addListener(NotifyPublishOperations listener)
{
synchronized (listeners_)
{
listeners_.add(listener);
}
}
public void removeListener(NotifyPublishOperations listener)
{
synchronized (listeners_)
{
listeners_.remove(listener);
}
}
public void actionSetChanged(EventType[] added, EventType[] removed)
{
synchronized (listeners_)
{
// use a iterator on a copy of the original list here.
// otherwise the iterator would fail if the list would be
// modified concurrently which happens during offer_change.
Iterator _i = new ArrayList(listeners_).iterator();
while (_i.hasNext())
{
NotifyPublishOperations _listener = (NotifyPublishOperations) _i.next();
try
{
_listener.offer_change(added, removed);
} catch (Exception e)
{
logger_.warn("offer_change failed for " + _listener, e);
}
}
}
}
public void offer_change(EventType[] added, EventType[] removed) throws InvalidEventType
{
changeSet(added, removed);
}
public EventType[] obtain_offered_types()
{
return getAllTypes();
}
}