/** {@inheritDoc} */
public void addHostListener(HostListener listener) {
synchronized (listeners) {
listeners.add(listener);
if (task == null) {
task = new NotifierTask();
timer.schedule(task, 0, interval);
}
}
}
/**
* @param _port
* @param id
* @throws RemoteException
* @throws UnknownHostException
*/
public Chord(int _port, int id) throws RemoteException, UnknownHostException {
finger = new Finger[(1 << M)]; // 1 << M = 2^(M)
// TODO: set the fingers in the array to null
i = id;
port = _port;
// TODO: determine the current IP of the machine
predecessor = null;
InetAddress ip = InetAddress.getLocalHost();
successor = new Finger(ip.getHostAddress(), i, i);
Timer timer = new Timer();
timer.scheduleAtFixedRate(
new TimerTask() {
@Override
public void run() {
try {
stabilize();
} catch (RemoteException | UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
fixFingers();
checkPredecessor();
}
},
500,
500);
try {
// create the registry and bind the name and object.
System.out.println("Starting RMI at port=" + port);
registry = LocateRegistry.createRegistry(port);
registry.rebind("Chord", this);
} catch (RemoteException e) {
throw e;
}
}