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Connection.java
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Connection.java
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/**
*
* @author Joel
*/
import java.io.IOException;
import java.net.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
public class Connection {
//Properties of this peer
private int myListenerPort;
private BitMap myBitMap;
private int myPeerID;
private String myHostName;
//Common config properties
private configProperties myCommonConfig;
private final int pieceSize;
private final int OPTIMISTIC_UNCHOKING_INTERVAL;
final int NUM_PREFERRED_NEIGHBORS;
private final int UNCHOKING_INTERVAL;
private AtomicInteger UnchokedPeer_Prev;
private ConcurrentHashMap<Integer, ClientConnection> peerConnectionMap;
private Map<Integer, Double> downloadrate_peer;
private Set<Integer> setofChokedPeers = new ConcurrentSkipListSet<Integer>();
private Set<Integer> myInterestedNeighbours;
private List<Integer> connectedPeersList;
private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
private Map<Integer, PeerConfig> peerInfoMap;
WriteLog w = new WriteLog();
public Connection(configProperties myCommonConfig, Map<Integer, PeerConfig> peerMap, int myPeerID) throws IOException, InterruptedException {
this.myCommonConfig = myCommonConfig;
PeerConfig myConfig = peerMap.get(myPeerID);
this.myHostName = myConfig.getHostName();
this.myListenerPort = myConfig.getListeningPort();
System.out.println("My host name = " + myHostName + " and my listening port is " + myListenerPort);
this.pieceSize = myCommonConfig.getPieceSize();
this.peerInfoMap = peerMap;
this.myPeerID = myPeerID;
this.downloadrate_peer = new HashMap<Integer, Double>();
this.myInterestedNeighbours = new ConcurrentSkipListSet<Integer>();
connectedPeersList = new ArrayList<Integer>();
this.NUM_PREFERRED_NEIGHBORS = myCommonConfig.getNumPreferredNeighbours();
this.UNCHOKING_INTERVAL = myCommonConfig.getUnchokingInterval();
this.OPTIMISTIC_UNCHOKING_INTERVAL = myCommonConfig.getOptimisticUnchokingInterval();
this.peerConnectionMap = new ConcurrentHashMap<Integer, ClientConnection>();
connectedPeersList.addAll(this.peerInfoMap.keySet());
UnchokedPeer_Prev = new AtomicInteger(-1);
//begin connection
this.begin();
}
public void begin() throws SocketTimeoutException, IOException, InterruptedException {
Thread serverThread = new Thread(new ServerConnection(myHostName, myListenerPort, this));
serverThread.start();
this.myBitMap = new BitMap(myPeerID, myCommonConfig, peerInfoMap.keySet(), this.peerInfoMap.get(myPeerID).hasCompleteFile(), this, this.peerInfoMap);
this.processPeerInfoMap();
scheduler.scheduleAtFixedRate(new ManageNeighbours(this), 0, UNCHOKING_INTERVAL, TimeUnit.SECONDS);
scheduler.scheduleAtFixedRate(new ManageOptimisticNeighbours(this), 0, OPTIMISTIC_UNCHOKING_INTERVAL, TimeUnit.SECONDS);
}
//Create client connections for peers with clientID < myPeerID
private void processPeerInfoMap() throws SocketTimeoutException, IOException {
for (Integer a : this.peerInfoMap.keySet()) {
if (a < myPeerID) {
System.out.println("Creating a client for " + myPeerID);
ClientConnection newClient = new ClientConnection(this.peerInfoMap.get(a).getHostName(),
this.peerInfoMap.get(a).getListeningPort(), this);
MessageHandler aMessageHandler = new MessageHandler(newClient, this);
(new Thread(aMessageHandler)).start();
this.peerConnectionMap.put(a, newClient);
}
}
}
public void sendGroupMessage(List<Integer> peerIDList, byte[] data) throws IOException {
for (Integer a : peerIDList) {
if (this.peerConnectionMap.containsKey(a)) {
this.peerConnectionMap.get(a).send(data);
}
}
}
public void sendPeerMessage(int peerID, byte[] data) throws IOException {
boolean hasKey = this.peerConnectionMap.containsKey(peerID);
if (hasKey == true) {
this.peerConnectionMap.get(peerID).send(data);
}
}
public BitMap getBitMap() {
return this.myBitMap;
}
public int getMyPeerID() {
return this.myPeerID;
}
public void reportInterestedPeer(int peerID) {
this.myInterestedNeighbours.add(new Integer(peerID));
}
public void reportNotInterestedPeer(int peerID) {
this.myInterestedNeighbours.remove(new Integer(peerID));
}
//Gets list of peers involved in this file transaction
public List<Integer> getconnectedPeersList() {
return connectedPeersList;
}
public List<Integer> computeAndGetWastePeersList() {
List<Integer> wastePeersList = new ArrayList<Integer>();
for (Integer peerID : connectedPeersList) {
if (!myBitMap.hasInterestingPiece(peerID)) {
wastePeersList.add(peerID);
}
}
return wastePeersList;
}
public synchronized void addOrUpdatedownloadrate_peer(Integer peerId, long elapsedTime) {
double downloadRate = (double) this.pieceSize / elapsedTime;
downloadrate_peer.put(peerId, downloadRate);
}
public synchronized void resetdownloadrate_peer(Integer peerId) {
downloadrate_peer.put(peerId, 0.0);
}
public double getDownloadRate(Integer peerId) {
if (this.downloadrate_peer.containsKey(peerId)) {
return downloadrate_peer.get(peerId);
} else {
return -1;
}
}
public Set<Integer> getmyInterestedNeighbours() {
return this.myInterestedNeighbours;
}
//Send choke message and adds it to list of choked peers
public void reportChokedPeer(Integer peerID) throws IOException, InterruptedException {
this.sendPeerMessage(peerID, new ChokeMessage().getFullMessage());
this.setofChokedPeers.add(peerID);
}
//Send unchoke message and remove it from list of choked peers
public void reportUnchokedPeer(int peerID) throws IOException, InterruptedException {
this.sendPeerMessage(peerID, new UnchokedMessage().getFullMessage());
this.setofChokedPeers.remove(peerID);
}
public Set<Integer> getChokedPeers() {
return this.setofChokedPeers;
}
public int getUnchokedPeer_Prev() {
return UnchokedPeer_Prev.get();
}
public void setUnchokedPeer_Prev(int peerId) {
this.UnchokedPeer_Prev.set(peerId);
}
public void reportNewClientConnection(int clientID, ClientConnection aClient) {
this.peerConnectionMap.put(clientID, aClient);
}
public void QuitProcess() {
try {
Thread.yield();
} catch (Exception e) {
}
scheduler.shutdown();
}
}