communicationeventobserver.java

自己写的一个聊天的小程序 请多多指教

/*
 * Copyright (c) 2003 - 2007, Silvio Meier and Tobias Reinhard
 *
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 *
 *   o Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer.
 *   o Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution.
 *   o The names of its contributors may not be used to endorse 
 *     or promote products derived from this software without 
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.sf.cscc;

/**
 * This interface has to be implemented by observers which want
 * to be notified about the communication events that occurred.
 *
 *	@author			Silvio Meier (SM)
 *	@copyright      Silvio Meier, Tobias Reinhard, 2003
 *	@history		2003-05-14 SM First Version
 *                  2003-05-14 SM working on additional methods and events,
 *                  correction of some comments.
 *                  2003-05-20 TR Comments corrected
 *	@version		$Date: 2007/07/01 17:04:05 $, $Author: reode_orm $, $Revision: 1.1 $
 */
public interface CommunicationEventObserver {
    /**
     *   This interface method is called by objects of the type
     *   {@link net.sf.cscc.CommunicationEventObservable}.
     *   The implementing class of this interface has to register at an
     *   instance of of the class {@link net.sf.cscc.CommunicationEventObservable}
     *   to get notifications about new communication events in the event queue.
     *   This is done by calling the method {@link net.sf.cscc.ServerConnectionManager#addObserver(CommunicationEventObserver o)}
     *   for observing the communication events of the server, respectively the
     *   method {@link net.sf.cscc.ClientConnectionManager#addObserver(CommunicationEventObserver o)}
     *   for the communication events of the client.
     *
     *   @pre ce != null
     *   @post true
     *   @param ce CommunicationEvent which is delivered to the implementor of
     *             this interface (ie. the observer).
     */
    void receiveEvent(CommunicationEvent ce);
}