package org.litesoft.p2pchat;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
// Copyright Status:
//
// All Software available from LiteSoft.org (including this file) is
// hereby released into the public domain.
//
// It is free! As in, you may use it freely in both commercial and
// non-commercial applications, bundle it with your software
// distribution, include it on a CD-ROM, list the source code in a book,
// mirror the documentation at your own web site, or use it in any other
// way you see fit.
//
// NO Warranty!
//
// All software is provided "as is".
//
// There is ABSOLUTELY NO WARRANTY OF ANY KIND: not for the design, fitness
// (for a particular purpose), level of errors (or lack thereof), or
// applicability of this software. The entire risk as to the quality
// and performance of this software is with you. Should this software
// prove defective, you assume the cost of all necessary servicing, repair
// or correction.
//
// In no event unless required by applicable law or agreed to in writing
// will any party who created or may modify and/or redistribute this
// software, be liable to you for damages, including any general,
// special, incidental or consequential damages arising out of the use or
// inability to use this software (including but not limited to loss of
// data or data being rendered inaccurate or losses sustained by you or
// third parties or a failure of this software to operate with any
// other programs), even if such holder or other party has been advised
// of the possibility of such damages.
//
// NOTE: Should you discover a bug, have a recogmendation for a change, wish
// to submit modifications, or wish to add new classes/functionality,
// please email them to:
//
// changes@litesoft.org
//
/**
* @author Devin Smith and George Smith
* @version 0.4 04/06/13 Add finish() to cleanly stop the PPM thread
* @version 0.3 02/02/02 Added IllegalArgument.ifNull for all public params that may not be null
* @version 0.2 01/28/02 Refactored and Added Licence
* @version 0.1 12/27/01 Initial Version
*/
public class PendingPeerManager extends Thread implements NewPeersSupport {
private UserDialog zUserDialog;
private PendingPeerLinkedList zPendingPeers = new PendingPeerLinkedList();
private PendingPeersSupport zPendingPeersSupport = null;
private int maxRetries = 3;
private boolean finish = false;
public PendingPeerManager(UserDialog pUserDialog) {
IllegalArgument.ifNull("UserDialog", zUserDialog = pUserDialog);
zUserDialog.setPendingPeerManager(this);
}
public void start(PendingPeersSupport pPendingPeersSupport) {
IllegalArgument.ifNull("PendingPeersSupport", zPendingPeersSupport = pPendingPeersSupport);
start();
}
public void addNewPeer(PeerInfo pInfo) {
IllegalArgument.ifNull("Info", pInfo);
zPendingPeers.add(null, pInfo);
}
public void addNewPeer(Socket pSocket) {
IllegalArgument.ifNull("Socket", pSocket);
InetAddress theirAddress = pSocket.getInetAddress();
String theirName = theirAddress.getHostName();
String theirIP = theirAddress.getHostAddress();
String name = theirIP.equals(theirName) ? null : "(Host: " + theirName + ")";
zPendingPeers.add(pSocket, new PeerInfo(name, theirIP));
}
public void addNewPeer(PeerInfo info, PeerReader reader, PeerWriter writer) {
zPendingPeersSupport.addActivePeer(info, reader, writer);
}
public void run() {
while (true) {
final PendingPeerNode next = zPendingPeers.next();
if (finish) {
return;
}
Runnable runnable = new Runnable() {
public void run() {
handleNewPeerClient(next);
}
};
new Thread(runnable).start();
}
}
public void finish() {
finish = true;
interrupt();
}
private void handleNewPeerClient(PendingPeerNode pPendingPeerNode) {
PeerInfo peerInfo = pPendingPeerNode.getPeerInfo();
if (zPendingPeersSupport.isAlreadyConnected(peerInfo)) {
return;
}
if ("true".equals(System.getProperty("debug"))) {
System.err.println("Attempting to contact " + peerInfo.format());
}
Socket socket = pPendingPeerNode.getSocket();
if (socket == null) {
try {
socket = getPeerClientSocketFromAddresses(peerInfo);
}
catch (IOException e) {
if ("true".equals(System.getProperty("debug"))) {
System.err.println("Failed to establish connection to " + peerInfo.format() + ": " + e.getMessage());
}
// If we're under the maximum number of retries, send this peer to the end of the queue
if (peerInfo.incrementFailureCount() <= maxRetries) {
zPendingPeers.add(socket, peerInfo);
}
else {
if ("true".equals(System.getProperty("debug"))) {
System.err.println("Maximum retries reached for " + peerInfo.format());
}
peerInfo.setFailureReason(e);
zUserDialog.showConnectFailed(peerInfo);
}
return;
}
}
InputStream inputStream = null;
OutputStream outputStream = null;
try {
inputStream = socket.getInputStream();
outputStream = socket.getOutputStream();
}
catch (IOException e) {
zUserDialog.showStreamsFailed(peerInfo);
try {
socket.close();
}
catch (IOException ignore) {
}
return;
}
zPendingPeersSupport.addActivePeer(peerInfo, inputStream, outputStream);
zUserDialog.showConnect(peerInfo);
}
private Socket getPeerClientSocketFromAddresses(PeerInfo pPeerInfo) throws IOException {
String pPeerAddresses = pPeerInfo.getAddresses();
int peerPort = pPeerInfo.getPort();
for (int i; -1 != (i = pPeerAddresses.indexOf(',')); pPeerAddresses = pPeerAddresses.substring(i + 1)) {
try {
return getPeerClientSocket(pPeerAddresses.substring(0, i), peerPort);
}
catch (IOException e) {
if ("true".equals(System.getProperty("debug"))) {
System.err.println("Failed to establish connection to " + pPeerAddresses.substring(0, i)
+ ":" + peerPort + ". " + e.getMessage());
}
}
}
return getPeerClientSocket(pPeerAddresses, peerPort);
}
private Socket getPeerClientSocket(String pPeerAddress, int pPeerPort) throws IOException {
Socket retval = new Socket(pPeerAddress, pPeerPort);
if ("true".equals(System.getProperty("debug"))) {
System.err.println("Established connection to " + pPeerAddress + ":" + pPeerPort);
}
return retval;
}
public void setMaxRetries(int maxRetries) {
this.maxRetries = maxRetries;
}
public void setSocketConnectTimeout(long socketConnectTimeout) {
}
}