peerpingaction.java

jxta官方例程

/*
*  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 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
*  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,
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*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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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: PeerPingAction.java,v 1.20 2006/07/12 21:24:29 nano Exp $
*/

package net.jxta.myjxta.ui.action;

import net.jxta.endpoint.MessageElement;
import net.jxta.endpoint.StringMessageElement;
import net.jxta.myjxta.View;
import net.jxta.myjxta.dialog.DialogMessage;
import net.jxta.myjxta.dialog.commands.PingCommand;
import net.jxta.myjxta.dialog.util.RemoteCommandInvoker;
import net.jxta.myjxta.plugin.ISelectableNode;
import net.jxta.myjxta.presence.PeerStatus;
import net.jxta.myjxta.presence.PresenceController;
import net.jxta.myjxta.util.Group;
import net.jxta.myjxta.util.GroupNode;
import net.jxta.myjxta.util.JxtaNode;
import net.jxta.myjxta.util.Peer;
import net.jxta.myjxta.util.PeerNode;
import net.jxta.protocol.PipeAdvertisement;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;

import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

/**
 * @author james todd [gonzo at jxta dot org]
 * @version $Id: PeerPingAction.java,v 1.20 2006/07/12 21:24:29 nano Exp $
 */

public class PeerPingAction
        extends PeerStatusAction {

    private static final int INTERVAL = 250;
    private static final int MAX = INTERVAL * 4 * 20;

    private static final Logger LOG = Logger.getLogger(PeerPingAction.class.getName());

    private View view = null;

    public PeerPingAction(String name, View view) {
        super(name, view);

        this.view = view;

        if (LOG.isEnabledFor(Level.INFO)) {
            LOG.info("PeerStatusAction instantiated");
        }
    }

    public boolean isEnabled() {
        ISelectableNode[] selectedNodes = this.view.getControl().getPluginContainer().getSelectedNodes();
        if (selectedNodes.length == 0) return false;
        for (int i = 0; i < selectedNodes.length; i++) {
            if (!(selectedNodes[i].getJxtaNode() != null)) {
                return false;
            }
        }
        return true;
    }

    public void actionPerformed(ActionEvent ae) {
        PeerNode[] nodes = getNodes();
        if (nodes.length < 1) {
            return;
        }
        PeerNode firstPeerNode = nodes[0];

        final Group g = ((GroupNode) (firstPeerNode.getParent())).getGroup();

        for (int i = 0; i < nodes.length; i++) {
            final PeerNode p = nodes[i];
            final Thread pingThread = new Thread(new Runnable() {
                public void run() {

                    process(g, p);
                }
            }, getClass().getName() + ":getConnection");
            pingThread.setDaemon(true);
            pingThread.start();
        }
    }

    protected PeerNode[] getNodes() {
        ISelectableNode[] selection = this.view.getControl().getPluginContainer().getSelectedNodes();
        ArrayList<JxtaNode> result = new ArrayList<JxtaNode>();
        for (int i = 0; i < selection.length; i++) {
            ISelectableNode iSelectableNode = selection[i];
            JxtaNode jxtaNode = iSelectableNode.getJxtaNode();
            if (jxtaNode instanceof PeerNode) {
                result.add(jxtaNode);
            }
        }
        return result.toArray(new PeerNode[0]);

    }

    private void process(Group g, PeerNode pn) {
        final Peer p = pn != null ? pn.getPeer() : null;
        if (p == null)
            throw new IllegalStateException("peer node doesnt have a peer object!");


        final PipeAdvertisement pipeAdvertisement = p.getPipeAdvertisement();
        RemoteCommandInvoker cf = new RemoteCommandInvoker(g, pipeAdvertisement,
                new PingCommand(), this.view.getControl());


        pn.setInfo(PeerNode.CONNECTION_ONGOING, "true", true);
        Map<String, MessageElement> messages = new HashMap<String, MessageElement>();

        messages.put(PingCommand.REQUESTOR_PIPE, new StringMessageElement(PingCommand.REQUESTOR_PIPE, g.getOwnPeersCommandId().toString(), null));
        messages.put(PingCommand.REQUESTOR_STATE, new StringMessageElement(PingCommand.REQUESTOR_STATE, PresenceController.getOnlineStatusState(pipeAdvertisement, g), null));
        messages.put(PingCommand.REQUESTOR_STATE_MESSAGE, new StringMessageElement(PingCommand.REQUESTOR_STATE_MESSAGE, PresenceController.getOwnPeerState(g).getStatusMessage(), null));
        cf.invoke(MAX, messages);

        DialogMessage r = cf.getResponse();
        LOG.info("Ping response:" + r);


        String res = r != null ? r.getCommand() : null;

        if (res != null) {
            MessageElement oppositeSideHasDiscoverdOurPeer = r.getMessageElement(PingCommand.REQUESTOR_DISCOVERED);
            MessageElement oppositeSideStatus = r.getMessageElement(PingCommand.RESPONDER_STATE);
            MessageElement oppositeSideStatusMessage = r.getMessageElement(PingCommand.RESPONDER_STATE_MESSAGE);
//            Resource rs = new Resource();

//            try {
//                rs.load(new ByteArrayInputStream(res.getBytes()));
//            } catch (ResourceNotFoundException rnfe) {
//                rnfe.printStackTrace();
//            }

            Boolean oppositePeerHasDiscovered = null;
            if (oppositeSideHasDiscoverdOurPeer != null) {
                if ("true".equalsIgnoreCase(oppositeSideHasDiscoverdOurPeer.toString()))
                    oppositePeerHasDiscovered = Boolean.TRUE;
                else
                    oppositePeerHasDiscovered = Boolean.FALSE;
            }

            PeerStatus opposidePresenceStatus = null;
            if (oppositeSideStatus != null) {
                String message = oppositeSideStatusMessage != null ? oppositeSideStatusMessage.toString() : null;
                opposidePresenceStatus = PeerStatus.getPeerStatus(oppositeSideStatus.toString(), message);
            }

            //suboptimal... we should be able to transfer more than one parameter to the node

            //no notify for this one (next one will notify listeners)
            pn.setInfo(PeerNode.STATUS_REVERSE_DISCOVERED, oppositePeerHasDiscovered, false);
            pn.setInfo(PeerNode.STATUS_REACHABLE, Boolean.TRUE, false);
            pn.setInfo(PeerNode.STATUS_PRESENCE, opposidePresenceStatus, true);


        } else {
            pn.setInfo(PeerNode.STATUS_REACHABLE, Boolean.FALSE, true);
        }
        pn.setInfo(PeerNode.CONNECTION_ONGOING, null, true);
    }

}