/* * Copyright 2004-2005 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package net.sf.jml.event;import net.sf.jml.MsnMessenger;/** * Msn messenger listener. *  * @author Roger Chen */public interface MsnMessengerListener {    /**     * Login completed.     *      * @param messenger     * 		the MsnMessenger who login     */    public void loginCompleted(MsnMessenger messenger);    /**     * Logout. Even not login completed may logout.     *      * @param messenger     * 		MsnMessenger     */    public void logout(MsnMessenger messenger);    /**     * Caught exception.     *      * @param messenger     * 		MsnMessenger     * @param throwable     *      cause     */    public void exceptionCaught(MsnMessenger messenger, Throwable throwable);}