?? eventdispatcher.java
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/* * Java SMPP API * Copyright (C) 1998 - 2002 by Oran Kelly * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * A copy of the LGPL can be viewed at http://www.gnu.org/copyleft/lesser.html * Java SMPP API author: orank@users.sf.net * Java SMPP API Homepage: http://smppapi.sourceforge.net/ * $Id: EventDispatcher.java,v 1.3 2005/05/09 21:04:52 orank Exp $ */package ie.omk.smpp.event;import ie.omk.smpp.Connection;import ie.omk.smpp.message.SMPPPacket;import java.util.Iterator;/** * This interface defines the observable side of the observer pattern for * asynchronous SMPP event notification. Each {@link ie.omk.smpp.Connection} * object will have an implementation of the <code>EventDispatcher</code> * interface which it uses to deliver events to interested listeners. By * removing the actual dispatching of events from the internals of the * Connection, applications may provide their own event dispatch implementations * for their <code>Connection</code> objects which better suit how those * applications work. * * @author Oran Kelly * @see ie.omk.smpp.event.SimpleEventDispatcher */public interface EventDispatcher { /** * Initialise the event dispatcher. The <code>init</code> method will be * called by the <code>Connection</code> before it makes any attempt to * add any observers or deliver any events via the dispatcher. */ public void init(); /** * Event dispatcher clean up. The <code>destroy</code> method will be * called by the <code>Connection</code> when it is finished delivering * events to it and the receiver daemon thread is exiting. Any initialising * done in the <code>init</code> method can be cleaned up here. * <p> * The <code>destroy</code> method <b>must not </b> interfere with the * delivery of any events notified to the event dispatcher before the call * to this method. * </p> */ public void destroy(); /** * Add an observer to this event dispatcher. * * @param observer * the observer object to add. */ public void addObserver(ConnectionObserver observer); /** * Remove an observer from this event dispatcher. * * @param observer * the observer object to remove from the registered observers. */ public void removeObserver(ConnectionObserver observer); /** * Get an iterator over the currently registered observers. * * @return an iterator object which iterates over all registered observers. */ public Iterator observerIterator(); /** * Notify all registered observers of an SMPP event. * * @param event * the SMPP event to notify observers of. */ public void notifyObservers(Connection conn, SMPPEvent event); /** * Notify all registered observers of a received SMPP packet. * * @param packet * the SMPP packet to notify observers of. */ public void notifyObservers(Connection conn, SMPPPacket packet);}
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