pingcommand.java

用jxse开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能

/*
*  Copyright (c) 2001 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 discalimer 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
*  permission of Sun.
*
*  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
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
*  ITS 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.
*  ====================================================================
*
*  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: PingCommand.java,v 1.12 2007/01/26 21:54:26 bondolo Exp $
*/

package net.jxta.myjxta.dialog.commands;

import net.jxta.endpoint.MessageElement;
import net.jxta.endpoint.StringMessageElement;
import net.jxta.id.IDFactory;
import net.jxta.myjxta.dialog.Dialog;
import net.jxta.myjxta.dialog.DialogMessage;
import net.jxta.myjxta.presence.PeerStatus;
import net.jxta.myjxta.presence.PresenceController;
import net.jxta.myjxta.util.RateLimitedOriginatorSearcher;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.PipeID;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Logger;

/**
 * The The base Dialog for Group Chats.
 * ge
 *
 * @author james todd [gonzo at jxta dot org]
 * @version $Id: PingCommand.java,v 1.12 2007/01/26 21:54:26 bondolo Exp $
 */

public class PingCommand
        extends AbstractCommand {

    public static final String ID = PingCommand.class.getName();
    public static final String RESPONSE = "pong";
    public static final String REQUESTOR_PIPE = "RequestorPipe";
    public static final String REQUESTOR_STATE = "RequestorState";
    public static final String REQUESTOR_STATE_MESSAGE = "RequestorStateMessage";
    public static final String RESPONDER_STATE = "ResponderState";
    public static final String RESPONDER_STATE_MESSAGE = "ResponderStateMessage";


    private static final Logger LOG = Logger.getLogger(PingCommand.class.getName());
    public static final String REQUESTOR_DISCOVERED = "RequestorDiscovered";

    public String getId() {
        return ID;
    }

    public boolean process(Dialog dialog, DialogMessage msg) {
        String cmd = msg != null ? msg.getCommand() : null;
        PeerGroup pg = dialog.getGroup().getPeerGroup();
        DialogMessage dm = new DialogMessage(pg.getPeerName(), null,
                pg.getPeerGroupID().toString(), pg.getPeerGroupName());

        if (cmd != null &&
                cmd.length() > 0) {
            setCommand(cmd);
            setReply(RESPONSE);
            setStatus(true);
            dm.setCommand(getResponse());
        }

        MessageElement senderPipeMessageElement = msg.getMessageElement(PingCommand.REQUESTOR_PIPE);
        String senderPipe = senderPipeMessageElement != null ? senderPipeMessageElement.toString() : null;

        MessageElement senderStateMessageElement = msg.getMessageElement(PingCommand.REQUESTOR_STATE);
        String senderState = senderStateMessageElement != null ? senderStateMessageElement.toString() : null;

        MessageElement senderStateUserMessageMessageElement = msg.getMessageElement(PingCommand.REQUESTOR_STATE_MESSAGE);
        String senderStateUserMessage = senderStateUserMessageMessageElement != null ? senderStateUserMessageMessageElement.toString() : null;

        LOG.log(java.util.logging.Level.INFO,
                "got a ping-request from:" + senderPipe + "/" + senderState);
        boolean found = false;
        PipeID pipeID;
        try {
            if (senderPipe != null && senderPipe.trim().length() > 0) {
                pipeID = (PipeID) IDFactory.fromURI(new URI(senderPipe));
                final PeerStatus peerStatus = PeerStatus.getPeerStatus(senderState, senderStateUserMessage);
                found = PresenceController.updateLastSeen(dialog.getGroup(), msg.getOriginator(), pipeID, peerStatus);
                if (!found) {
                    RateLimitedOriginatorSearcher searcher = new RateLimitedOriginatorSearcher(dialog.getGroup(), dialog.getMyJXTA());
                    if (!searcher.searchedRecently(msg.getOriginator())) {
                        searcher.search(msg.getOriginator());
                    } else {
                        LOG.log(java.util.logging.Level.WARNING,
                                "flood ping from:" + msg.getOriginator());
                    }
                }
            }

        } catch (URISyntaxException e) {
            e.printStackTrace();
        }


        dm.addMessageElement(PingCommand.RESPONDER_STATE, new StringMessageElement(PingCommand.RESPONDER_STATE, PresenceController.getOnlineStatusState(null, dialog.getGroup()), null));
        dm.addMessageElement(PingCommand.RESPONDER_STATE_MESSAGE, new StringMessageElement(PingCommand.RESPONDER_STATE_MESSAGE, PresenceController.getOwnPeerState(dialog.getGroup()).getStatusMessage(), null));
        dm.addMessageElement(PingCommand.REQUESTOR_DISCOVERED, new StringMessageElement(PingCommand.REQUESTOR_DISCOVERED, Boolean.toString(found), null));
        dialog.dispatch(dm);

        return getStatus();
    }
}