001/*
002 * Ad Hoc Polling Application
003 * Copyright (C) 2018 Michael N. Lipp
004 * 
005 * This program is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Affero General Public License as published by 
007 * the Free Software Foundation; either version 3 of the License, or 
008 * (at your option) any later version.
009 * 
010 * This program is distributed in the hope that it will be useful, but 
011 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
012 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License 
013 * for more details.
014 * 
015 * You should have received a copy of the GNU Affero General Public License along 
016 * with this program; if not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jgrapes.io;
020
021import org.jgrapes.core.Channel;
022import org.jgrapes.core.Component;
023import org.jgrapes.core.annotation.Handler;
024import org.jgrapes.io.events.Close;
025import org.jgrapes.io.events.Purge;
026
027/**
028 * A component that handles {@link Purge} events
029 * by unconditionally firing a {@link Close} events as response.
030 */
031public class PurgeTerminator extends Component {
032
033    /**
034     * @param componentChannel
035     */
036    public PurgeTerminator(Channel componentChannel) {
037        super(componentChannel);
038    }
039
040    /**
041     * Handles a {@link Purge} event by sending a {@link Close} event.
042     *
043     * @param event the event
044     * @param channel the channel
045     */
046    @Handler
047    public void onPurge(Purge event, IOSubchannel channel) {
048        // Needn't close this more than once
049        event.stop();
050        channel.respond(new Close());
051    }
052}