/**
* Update handles announcing an event to a group of peers
*
* @param event the event we are announcing
* @param manager the manager
* @return arraylist the arraylist of updated peers
*/
@SuppressWarnings("unchecked")
public ArrayList<Peer> update(String event, Manager manager) {
this.event = event;
this.requestString = createURL(this.announce);
HashMap<ByteBuffer, Object> response = null;
try {
byte[] trackerResponse = sendGETRecieveResponse();
if (trackerResponse == null) {
log.severe("Error communicating with tracker");
try {
manager.close();
} catch (IOException e) {
log.severe("Error closing manager after miscommunication with tracker");
}
return null;
}
response = (HashMap<ByteBuffer, Object>) Bencoder2.decode(trackerResponse);
} catch (BencodingException e1) {
log.severe("Error decoding tracker response");
try {
manager.close();
} catch (IOException e) {
log.severe("Error closing manager after miscommunication with tracker");
}
return null;
}
if (response.containsKey(KEY_FAILURE)) {
log.severe("Uh-oh. Failure from the tracker!");
try {
manager.close();
} catch (IOException e) {
log.severe("Error closing manager after miscommunication with tracker");
}
return null;
}
ArrayList<Peer> peers = new ArrayList<Peer>();
this.interval = (Integer) response.get(KEY_INTERVAL);
List<Map<ByteBuffer, Object>> peersList =
(List<Map<ByteBuffer, Object>>) response.get(KEY_PEERS);
// TODO: Check if peersList is null!
if (peersList == null) {
log.severe("Error: list of peers given by tracker is null");
return null;
}
for (Map<ByteBuffer, Object> rawPeer : peersList) {
int peerPort = ((Integer) rawPeer.get(KEY_PORT)).intValue();
byte[] peerId = ((ByteBuffer) rawPeer.get(KEY_PEERID)).array();
String ip = null;
try {
ip = new String(((ByteBuffer) rawPeer.get(KEY_IP)).array(), "ASCII");
} catch (UnsupportedEncodingException e) {
log.severe("Unable to parse encoding");
continue;
}
peers.add(new Peer(peerId, peerPort, ip, manager));
}
log.fine("Converted: " + (peers));
return peers;
}
public static void main(String[] args) {
// boolean ready = false;
// final Vector<Phidget> attachedPhidgets = new Vector<Phidget>();
Manager mgr;
try {
mgr = new Manager();
mgr.open();
/*
* With listeners...
*/
mgr.addAttachListener(
new AttachListener() {
@Override
public void attached(AttachEvent ae) {
try {
System.out.println(
"Phidget attached: "
+ ae.getSource().getDeviceName()
+ " sn="
+ ae.getSource().getSerialNumber());
} catch (PhidgetException e) {
e.printStackTrace();
}
}
});
mgr.addDetachListener(
new DetachListener() {
@Override
public void detached(DetachEvent de) {
try {
System.out.print(de.getSource().getSerialNumber() + " detached.");
} catch (PhidgetException e) {
e.printStackTrace();
}
}
});
while (true) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
mgr.close();
}
}
/*
* Without listeners...
*/
// while(!ready){
// if(!mgr.getPhidgets().isEmpty()){
// // get and create the phidgets
// Vector currPhidgets = mgr.getPhidgets();
// for(int i = 0; i < currPhidgets.size(); i++){
// Phidget p = (Phidget) currPhidgets.elementAt(i);
// int sn = p.getSerialNumber();
// p.open(sn);
// p.waitForAttachment();
// attachedPhidgets.addElement(p);
// System.out.println(p.getDeviceName() + ": " + sn + " attached.");
// }
// ready = true;
// }
//
// try {
// Thread.sleep(500);
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
//
// }
// System.out.println("All done!");
// for(Phidget ap : attachedPhidgets){
// ap.close();
// }
// mgr.close();
} catch (PhidgetException e1) {
e1.printStackTrace();
}
System.exit(0);
}
