org.hachreak.projects.networkcodingsip2peer.behavior.PublishEncodedFileClientBehavior.java Source code

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Here is the source code for org.hachreak.projects.networkcodingsip2peer.behavior.PublishEncodedFileClientBehavior.java

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/**
 * Copyright (C) 2013 Leonardo Rossi <leonardo.rossi@studenti.unipr.it>
 *
 * This source code 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 source code 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 source code; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

package org.hachreak.projects.networkcodingsip2peer.behavior;

import it.unipr.ce.dsg.s2p.org.json.JSONObject;
import it.unipr.ce.dsg.s2p.peer.NeighborPeerDescriptor;
import it.unipr.ce.dsg.s2p.peer.PeerListManager;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Properties;

import org.hachreak.projects.gfjama.matrix.GaloisField;
import org.hachreak.projects.networkcodingsip2peer.engine.CodingEngine;
import org.hachreak.projects.networkcodingsip2peer.engine.NetworkCodingEngine;
import org.hachreak.projects.networkcodingsip2peer.msg.EncodedFragmentPublishMessage;
import org.hachreak.projects.networkcodingsip2peer.peer.SimplePeer;
import org.hachreak.projects.networkcodingsip2peer.resource.EncodedFragment;
import org.hachreak.projects.networkcodingsip2peer.resource.MediaResource;

public class PublishEncodedFileClientBehavior extends Behavior {

    public static final String GF_N = "GF_n";
    public static final String REDUNDANCY_RATE = "redundancyRate";
    public static final String FRAGMENT_SIZE = "fragmentSize";

    private Properties configFile = new java.util.Properties();

    /**
     * GF(p^n) -> GF(2^n)
     */
    private static byte GF_n = 16;

    private static GaloisField galoisField = new GaloisField(GF_n);

    private int fragmentSize = 10000;

    private float redundancyRate = 5 / 2;

    //   private SimplePeer peer;
    private MediaResource mediaResource = null;
    private CodingEngine codingEngine;
    private List<EncodedFragment> fragments = new ArrayList<EncodedFragment>();
    private PeerListManager storePeerListManager;

    private List<EncodedFragment> fragmentsRetrieved = new ArrayList<EncodedFragment>();

    public PublishEncodedFileClientBehavior(SimplePeer peer, PeerListManager storePeerListManager, File file)
            throws IOException {
        super(peer);
        initPeerConfig(peer);
        this.storePeerListManager = storePeerListManager;
        this.mediaResource = new MediaResource(file, fragmentSize, galoisField);
        codingEngine = new NetworkCodingEngine(redundancyRate);
    }

    private void initPeerConfig(SimplePeer peer) throws IOException {
        initFromConfigFile();
    }

    protected void publishFile() throws Exception {
        fragments = codingEngine.encode(mediaResource);

        if (codingEngine.getOutputNumOfFragments(mediaResource) > storePeerListManager.size())
            throw new Exception("number of fragment > peer list size");

        Iterator<Entry<String, NeighborPeerDescriptor>> it = storePeerListManager.entrySet().iterator();
        int i = 0;
        while (it.hasNext()) {
            NeighborPeerDescriptor pd = it.next().getValue();

            EncodedFragment f = fragments.get(i);

            getPeer().send(pd, new EncodedFragmentPublishMessage(f));

            i++;
            if (i >= fragments.size())
                break;
        }
    }

    public void onReceivedJSONMsg(String type, JSONObject jsonMsg) {
        //      try {
        //         JSONObject params = jsonMsg.getJSONObject("payload").getJSONObject(
        //               "params");
        //
        //         if (type.equals(EncodedFragmentResponseMessage.MSG_FRAGMENT_RESPONSE)) {
        //
        //            // returned a fragment required
        //            fragmentsRetrieved.add(EncapsulatedEncodedFragment
        //                  .decodeJSONFragment(params));
        //
        //         }
        //      } catch (JSONException e) {
        //         // TODO Auto-generated catch block
        //         e.printStackTrace();
        //      }
    }

    /**
     * On run: start publishing of file
     */
    public void run() {
        try {
            publishFile();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * Load configuration file
     * 
     * @throws IOException
     */
    private void initFromConfigFile() throws IOException {
        InputStream i = new FileInputStream(getPeer().getPathConfig());

        // peer configuration
        configFile.load(i);

        if (configFile.containsKey(GF_N)) {
            GF_n = Byte.parseByte(configFile.getProperty(GF_N));

            galoisField = new GaloisField(GF_n);
        }

        if (configFile.containsKey(FRAGMENT_SIZE))
            fragmentSize = Integer.parseInt(configFile.getProperty(FRAGMENT_SIZE));

        if (configFile.containsKey(REDUNDANCY_RATE))
            redundancyRate = Float.parseFloat(configFile.getProperty(REDUNDANCY_RATE));

    }

    public CodingEngine getCodingEngine() {
        return codingEngine;
    }

    public MediaResource getMediaResource() {
        return mediaResource;
    }

}