elanp2pserver.java

编辑视频文件

/*
 * File:     ElanP2PServer.java
 * Project:  MPI Linguistic Application
 * Date:     02 May 2007
 *
 * Copyright (C) 2001-2007  Max Planck Institute for Psycholinguistics
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * Created on Feb 17, 2004
 *
 * First onset to make Elan a service provider for collaborative annotation services
 *
 */
package mpi.eudico.p2p;

import mpi.eudico.client.annotator.commands.CommandAction;
import mpi.eudico.client.annotator.commands.ELANCommandFactory;

import mpi.eudico.server.corpora.clom.Transcription;

import net.jxta.credential.AuthenticationCredential;
import net.jxta.credential.Credential;

import net.jxta.discovery.DiscoveryService;

import net.jxta.document.AdvertisementFactory;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredTextDocument;

import net.jxta.endpoint.Message;

import net.jxta.exception.PeerGroupException;

import net.jxta.id.IDFactory;

import net.jxta.membership.Authenticator;
import net.jxta.membership.MembershipService;

import net.jxta.peergroup.PeerGroup;
import net.jxta.peergroup.PeerGroupFactory;
import net.jxta.peergroup.PeerGroupID;

import net.jxta.pipe.InputPipe;
import net.jxta.pipe.OutputPipe;
import net.jxta.pipe.PipeID;
import net.jxta.pipe.PipeMsgEvent;
import net.jxta.pipe.PipeMsgListener;
import net.jxta.pipe.PipeService;

import net.jxta.platform.ModuleClassID;
import net.jxta.platform.ModuleSpecID;

import net.jxta.protocol.ModuleClassAdvertisement;
import net.jxta.protocol.ModuleImplAdvertisement;
import net.jxta.protocol.ModuleSpecAdvertisement;
import net.jxta.protocol.PeerGroupAdvertisement;
import net.jxta.protocol.PipeAdvertisement;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;


/**
 * DOCUMENT ME!
 *
 * @author hennie
 */
public class ElanP2PServer implements PipeMsgListener {
    private static PeerGroup netGroup = null;
    private static DiscoveryService netDiscoSvc;

    //	private final static String SERVICE = "JXTASPEC:ELAN"; // service name

    /** Holds value of property DOCUMENT ME! */
    private final static String TAG = "DataTag"; // tag in message

    /** Holds value of property DOCUMENT ME! */
    private final static String COMMAND = "Command";

    /** Holds value of property DOCUMENT ME! */
    private final static String TRANSCRIPTION_ID = "TranscriptionID";

    /** Holds value of property DOCUMENT ME! */
    private final static String FILENAME = "pipeserver.adv"; // file containing pipe advert.
    private PeerGroup sessionGroup = null;
    private DiscoveryService sessionDiscoSvc;
    private PipeService pipeSvc;
    private InputPipe myPipe; // input pipe for the service
    private Message msg; // message received on input pipe
    private OutputPipe broadcastPipe;
    private Transcription transcription;

    /**
     * Creates a new ElanP2PServer instance
     *
     * @param theTranscription DOCUMENT ME!
     */
    public ElanP2PServer(Transcription theTranscription) {
        transcription = theTranscription;
    }

    /**
     * DOCUMENT ME!
     */
    public static void initP2P() {
        System.out.println("Setup Elan for p2p services");
        startJxta();
    }

    private static void startJxta() {
        try {
            // create, and Start the default jxta NetPeerGroup
            netGroup = PeerGroupFactory.newNetPeerGroup();
        } catch (PeerGroupException e) {
            // could not instanciate the group, print the stack and exit
            System.out.println("fatal error : group creation failure");
            e.printStackTrace();

            return;
        }

        // get the discovery, and pipe service
        System.out.println("Getting NetDiscoveryService");
        netDiscoSvc = netGroup.getDiscoveryService();

        //		System.out.println("Getting PipeService");
        //		pipeSvc = group.getPipeService();      
    }

    /**
     * DOCUMENT ME!
     */
    public void startServer() {
        sessionGroup = createGroup();

        if (sessionGroup != null) {
            joinGroup(sessionGroup);
        }

        try {
            System.out.println("Share " + transcription.getName() +
                " in p2p annotation session");

            sessionDiscoSvc = sessionGroup.getDiscoveryService();

            System.out.println("Getting Session PipeService");
            pipeSvc = sessionGroup.getPipeService();

            // Create the Module class advertisement associated with the service
            // We build the module class advertisement using the Advertisement
            // Factory class by passing it the type of the advertisement we
            // want to construct. The Module class advertisement is a
            // a very small advertisement that only advertises the existence
            // of service. In order to access the service, a peer will
            // have to discover the associated module spec advertisement.
            ModuleClassAdvertisement mcadv = (ModuleClassAdvertisement) AdvertisementFactory.newAdvertisement(ModuleClassAdvertisement.getAdvertisementType());

            mcadv.setName("JXTAMOD:ELAN");
            mcadv.setDescription(
                "First attempt to provide p2p annotation services");

            ModuleClassID mcID = IDFactory.newModuleClassID();
            mcadv.setModuleClassID(mcID);

            // Ok the Module Class advertisement was created, just publish
            // it in my local cache and to my peergroup. This
            // is the NetPeerGroup
            sessionDiscoSvc.publish(mcadv, DiscoveryService.ADV);
            sessionDiscoSvc.remotePublish(mcadv, DiscoveryService.ADV);

            // Create the Module Spec advertisement associated with the service
            // We build the module Spec Advertisement using the advertisement
            // Factory class by passing in the type of the advertisement we
            // want to construct. The Module Spec advertisement will contain
            // all the information necessary for a client to contact the service
            // for instance it will contain a pipe advertisement to
            // be used to contact the service
            ModuleSpecAdvertisement mdadv = (ModuleSpecAdvertisement) AdvertisementFactory.newAdvertisement(ModuleSpecAdvertisement.getAdvertisementType());

            // Setup some of the information field about the servive. In this
            // example, we just set the name, provider and version and a pipe
            // advertisement. The module creates an input pipes to listen
            // on this pipe endpoint.
            mdadv.setName(transcription.getName());
            mdadv.setVersion("Version 1.0");
            mdadv.setCreator("mpi.nl");

            ModuleSpecID id = (ModuleSpecID) IDFactory.newModuleSpecID(mcID);

            mdadv.setModuleSpecID(id);
            mdadv.setSpecURI("http://www.mpi.nl/tools");

            // Create a pipe advertisement for the Service. The client MUST use