Mercurial > hg > release > thermostat-1.0
view common/core/src/main/java/com/redhat/thermostat/common/ActionNotifier.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
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date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | ae64ab3629ca |
children |
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/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.common; import java.util.Collection; import java.util.concurrent.CopyOnWriteArrayList; import java.util.logging.Level; import java.util.logging.Logger; import com.redhat.thermostat.common.utils.LoggingUtils; public class ActionNotifier<T extends Enum<?>> { private static final Logger logger = LoggingUtils.getLogger(ActionNotifier.class); public ActionNotifier(Object source) { this.source = source; listeners = new CopyOnWriteArrayList<ActionListener<T>>(); } private final Collection<ActionListener<T>> listeners; private final Object source; public void addActionListener(ActionListener<T> listener) { listeners.add(listener); } public void removeActionListener(ActionListener<T> listener) { listeners.remove(listener); } public void fireAction(T actionId) { fireAction(actionId, null); } public int listenersCount() { return listeners.size(); } public void fireAction(T actionId, Object payload) { ActionEvent<T> action = new ActionEvent<>(source, actionId); action.setPayload(payload); for (ActionListener<T> listener : listeners) { try { listener.actionPerformed(action); } catch (Exception e) { // a listener throwing exception is BAD // unfortunately, all we can do is make sure other listeners continue working logger.log(Level.WARNING, "a listener threw an unexpected exception", e); } } } }