001/*
002 * JGrapes Event Driven Framework
003 * Copyright (C) 2022 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.events;
020
021import org.jgrapes.core.Event;
022import org.jgrapes.io.IOSubchannel;
023
024/**
025 * This event is fired on {@link IOSubchannel}s that are created
026 * by provider components before their first usage for {@link Input}
027 * or {@link Output} events.
028 * 
029 * The subsequent {@link Opened} event (or some specialization) will
030 * be sent only after the {@link Opening} event has completed. This
031 * allows components to set up additional data processing for the newly
032 * created {@link IOSubchannel} before data is sent to it.
033 */
034public class Opening<T> extends Event<T> {
035
036}