//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/narya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

package com.threerings.presents.server;

import com.threerings.util.signal.SignalManager;

import static com.threerings.presents.Log.log;

/**
 * Handles signals using Narya's native libsignal.
 */
public class NativeSignalHandler extends AbstractSignalHandler
    implements SignalManager.SignalHandler
{
    // from interface SignalManager.SignalHandler
    public boolean signalReceived (int signo)
    {
        switch (signo) {
        case SignalManager.SIGTERM:
            termReceived();
            break;
        case SignalManager.SIGINT:
            intReceived();
            break;
        case SignalManager.SIGHUP:
            hupReceived();
            break;
        case SignalManager.SIGUSR2:
            usr2Received();
            break;
        default:
            log.warning("Received unknown signal", "signo", signo);
            break;
        }
        return true;
    }

    @Override
    protected boolean registerHandlers ()
    {
        if (!SignalManager.servicesAvailable()) {
            return false;
        }
        SignalManager.registerSignalHandler(SignalManager.SIGTERM, this);
        SignalManager.registerSignalHandler(SignalManager.SIGINT, this);
        SignalManager.registerSignalHandler(SignalManager.SIGHUP, this);
        SignalManager.registerSignalHandler(SignalManager.SIGUSR2, this);
        return true;
    }
}
