001/* 002 * JGrapes Event Driven Framework 003 * Copyright (C) 2017-2018 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.util; 020 021import java.util.EventListener; 022 023/** 024 * Used to notify interested objects about the changed availability 025 * of permits. 026 */ 027public interface AvailabilityListener extends EventListener { 028 029 /** 030 * Called when the availability has changed. 031 * 032 * @param pool the pool 033 * @param available the available 034 */ 035 void availabilityChanged(PermitsPool pool, boolean available); 036 037}