/*
* File : SuperSeedPiece.java
* Created : 13 dec. 2003}
* By : Olivier
*
* Azureus - a Java Bittorrent client
*
* 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.
*
* 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 ( see the LICENSE file ).
*
* 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
*/
package org.gudy.azureus2.core3.peer.impl.control;
import org.gudy.azureus2.core3.peer.PEPeer;
import org.gudy.azureus2.core3.peer.impl.PEPeerControl;
import org.gudy.azureus2.core3.util.*;
/**
* @author Olivier
*
*/
public class SuperSeedPiece {
//private PEPeerControl manager;
private int pieceNumber;
private int level;
private long timeFirstDistributed;
private PEPeer firstReceiver;
//private int numberOfPeersWhenFirstReceived;
private int timeToReachAnotherPeer;
// use class monitor to reduce number of monitor objects (low contention here)
private static AEMonitor class_mon = new AEMonitor( "SuperSeedPiece:class" );
public SuperSeedPiece(PEPeerControl manager,int _pieceNumber) {
Ignore.ignore( manager );
pieceNumber = _pieceNumber;
level = 0;
}
public void peerHasPiece(PEPeer peer) {
try{
class_mon.enter();
//System.out.println("piece: #"+pieceNumber+" , old level:"+level+", timeFirstDistributed:"+timeFirstDistributed+ "/ timetoreachanotherpeer:"+timeToReachAnotherPeer);
if(level < 2) {
// first time that somebody tells us this piece exists elsewhere
// if peer=null, it is due to bitfield scan, so firstreceiver gets NULL
firstReceiver = peer;
timeFirstDistributed = SystemTime.getCurrentTime();
//numberOfPeersWhenFirstReceived = manager.getNbPeers();
level = 2;
}
else {
// level=2 or 3 and we arrive here when somebody has got the piece, either BT_HAVE or bitfield scan
// if we are here due to bitfield scan, 'peer' = null --> do nothing
// if level=2 --> mark piece redistributed, set speedstatus of firstreceiver, bump level to 3
// if level=3 --> this piece has been already seen at 3rd party earlier, do nothing
if(peer != null && firstReceiver != null && level==2) {
timeToReachAnotherPeer = (int) (SystemTime.getCurrentTime() - timeFirstDistributed);
firstReceiver.setUploadHint(timeToReachAnotherPeer);
level = 3;
}
}
}
finally{
class_mon.exit();
}
}
public int getLevel() {
return level;
}
public void pieceRevealedToPeer() {
try{
class_mon.enter();
level = 1;
}finally{
class_mon.exit();
}
}
/**
* @return Returns the pieceNumber.
*/
public int getPieceNumber() {
return pieceNumber;
}
public void peerLeft() {
if(level == 1)
level = 0;
}
public void updateTime() {
if(level < 2)
// not yet distributed, no effect on speed status
return;
if(timeToReachAnotherPeer > 0)
// piece has been seen elsewhere, no effect on speed status any more
return;
if(firstReceiver == null)
// piece was found due to bitfield scan, no idea how it got distributed
return;
int timeToSend = (int) (SystemTime.getCurrentTime() - timeFirstDistributed);
if(timeToSend > firstReceiver.getUploadHint())
firstReceiver.setUploadHint(timeToSend);
}
}