/**
* Installs the network coordinate service on a given node.
* NCService instance can be installed on atmost one node.
* Each node is allowed to have only one NCService instance.
* @param node node for installing the service instance.
* @param InitialPoint a starting place for the NCService to use
*/
public NCService(Node node, Point InitialPoint)
{
_sync = new object();
_node = null;
_last_sample_instant = DateTime.MinValue;
_samples = new Hashtable();
_vivaldi_state = new VivaldiState();
_vivaldi_state.WeightedError = INITIAL_WEIGHTED_ERROR;
_vivaldi_state.Position = new Point();
_vivaldi_state.DistanceDelta = 0.0f;
if (InitialPoint == null)
{
InitialPoint = new Point();
}
_vivaldi_state.Position = InitialPoint;
if (node != null)
{
_node = node;
#if NC_DEBUG
Console.Error.WriteLine("[NCService] {0} Starting an instance of NCService.", node.Address);
#endif
lock (_sync) {
_rpc = _node.Rpc;
_rpc.AddHandler("ncserver", this);
_node.HeartBeatEvent += GetNextSample;
}
}
}
/**
* This method packages the current state of the network coordinates
* into a Hashtable than can be sent back as Brunet-Rpc result.
* @returns hashtable representing the network coordinate state.
*/
public Hashtable EchoVivaldiState()
{
#if NC_DEBUG
if (_node != null)
{
//Console.Error.WriteLine("[NCService] {0} EchoVivaldiState() method invoked.", _node.Address);
}
#endif
//get snapshot of the local vivaldi state
VivaldiState v_state = State;
//
// Hashtable containing the Vivaldi state.
//
Hashtable ht = new Hashtable();
//error
ht["error"] = v_state.WeightedError;
//local coordinates
Hashtable ht_position = new Hashtable();
ht_position["side"] = new ArrayList(v_state.Position.Side);
ht_position["height"] = v_state.Position.Height;
ht["position"] = ht_position;
ht["hostname"] = _hostname;
#if NC_DEBUG
if (_node != null)
{
//Console.Error.WriteLine("[NCService] {0} EchoVivaldiState() returning.", _node.Address);
}
#endif
return(ht);
}
/**
* Installs the network coordinate service on a given node.
* NCService instance can be installed on atmost one node.
* Each node is allowed to have only one NCService instance.
* @param node node for installing the service instance.
* @param InitialPoint a starting place for the NCService to use
*/
public NCService(Node node, Point InitialPoint) {
_sync = new object();
_node = null;
_last_sample_instant = DateTime.MinValue;
_samples = new Hashtable();
_vivaldi_state = new VivaldiState();
_vivaldi_state.WeightedError = INITIAL_WEIGHTED_ERROR;
_vivaldi_state.Position = new Point();
_vivaldi_state.DistanceDelta = 0.0f;
if(InitialPoint == null) {
InitialPoint = new Point();
}
_vivaldi_state.Position = InitialPoint;
if(node != null) {
_node = node;
#if NC_DEBUG
Console.Error.WriteLine("[NCService] {0} Starting an instance of NCService.", node.Address);
#endif
lock(_sync) {
_rpc = _node.Rpc;
_rpc.AddHandler("ncserver", this);
_node.HeartBeatEvent += GetNextSample;
}
}
}
