discoverylistener.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *
 * $Id: DiscoveryListener.java,v 1.10 2006/05/25 00:41:33 hamada Exp $
 *
 * Copyright (c) 2001-2006 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
 *    must not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
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 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: DiscoveryListener.java,v 1.10 2006/05/25 00:41:33 hamada Exp $
 *
 */

package net.jxta.discovery;

import java.util.EventListener;

/**
 *  The listener interface for receiving {@link DiscoveryEvent}s from the
 *  Discovery Service.
 *
 *  The following 2 examples illustrate how to implement a 
 *  <code>DiscoverListener</code>:
 *
 * <p/><b>Example 1:</b>
 * <pre>
 * DiscoveryListener myListener = new DiscoveryListener() {
 *   public void discoveryEvent(DiscoveryEvent e) {
 *     DiscoveryResponseMsg msg = e.getResponse();
 *     if (myQueryID == e.getQueryID()) {
 *       int advCount = msg.getResponseCount();
 *     }
 *   }
 *   discovery.addDiscoveryListener(myListener);
 *   int myQueryID = discovery.getRemoteAdvertisements(address,
 *     discovery.GROUP, attr, val,threshold);
 * </pre>
 *
 * <p/><b>Example 2:</b>
 * <pre>
 * public class JxtaAppDemo implements Runnable, DiscoveryListener {
 *          ..
 *          ..
 *  public void discoveryEvent(DiscoveryEvent ev) {
 *
 *     DiscoveryResponseMsg res = ev.getResponse();
 *     ..
 *     ..
 *     // see tutorial example 2 for full source
 *     // <a href="http://www.jxta.org/project/www/Tutorials.html">JXTA Tutorials</a>
 *     }
 * }
 * </pre>
 *
 *  @see net.jxta.discovery.DiscoveryService
 *  @see net.jxta.discovery.DiscoveryEvent
 **/
public interface DiscoveryListener extends EventListener {

    /**
     * Called to handle an event from the Discovery Service.
     *
     * @param event the discovery event
     */
    void discoveryEvent( DiscoveryEvent event );
}