/**
* Invoked when the request channel is closed.
*/
protected void CloseHandler(object o, EventArgs args)
{
RequestState request = null;
lock (_sync) {
//retrieve the request state assiciated with the closed channel
request = (RequestState)_channel_to_state[o];
if (request == null)
{
//cannot happen
Console.Error.WriteLine("VTS unable to retrieve request for a closed channel");
return;
}
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1} channel closed.", _node.Address, request.Start);
#endif
_channel_to_state.Remove(o);
_num_requests--;
}
/**
* The request object has been removed the shared data structure.
* Since no one alse has access to it, it can be accessed outside the lock.
*/
SortedList sorted_result = new SortedList();
#if VTS_DEBUG
SortedList sorted_stat = new SortedList();
#endif
NCService.VivaldiState local_vs = _nc_service.State;
foreach (Address target in request.ResultTable.Keys)
{
object[] curr_result = (object[])request.ResultTable[target];
NCService.VivaldiState vs = (NCService.VivaldiState)curr_result[0];
double d = local_vs.Position.GetEucledianDistance(vs.Position);
sorted_result[d] = target;
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1}, dest: {2}, distance: {3}",
_node.Address, request.Start, target, d);
string host = (string)curr_result[1];
sorted_stat[d] = new object[] { d, host };
#endif
}
#if VTS_DEBUG
lock (_sync) {
_query_list.Add(sorted_stat);
}
#endif
request.Callback(request.Start, sorted_result, request.Current);
}
/**
* Invoked when a result is enqueued into the channel.
*/
protected void EnqueueHandler(object o, EventArgs args)
{
Channel q = (Channel)o;
bool close_channel = false;
lock (_sync) {
try {
RpcResult result = q.Dequeue() as RpcResult;
Hashtable ht = (Hashtable)result.Result;
Hashtable ht_position = (Hashtable)ht["position"];
NCService.VivaldiState vs = new NCService.VivaldiState();
vs.Position = new Point((double[])((ArrayList)ht_position["side"]).ToArray(typeof(double)), (double)ht_position["height"]);
vs.WeightedError = (double)ht["error"];
ForwardingSender fs = result.ResultSender as ForwardingSender;
//record this information in the request state.
RequestState request = (RequestState)_channel_to_state[q];
if (request != null)
{
//make sure this is not our own reply
if (!fs.Destination.Equals(_node.Address))
{
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1}, dest: {2}", _node.Address, request.Start, fs.Destination);
#endif
request.ResultTable[fs.Destination] = new object[] { vs, (string)ht["hostname"] };
}
if (request.ResultTable.Keys.Count >= (int)request.Range * 0.75)
{
close_channel = true;
}
}
} catch {}
}
if (close_channel)
{
q.Close();
}
}
/**
* Invoked when a result is enqueued into the channel.
*/
protected void EnqueueHandler(object o, EventArgs args) {
Channel q = (Channel) o;
bool close_channel = false;
lock(_sync) {
try {
RpcResult result = q.Dequeue() as RpcResult;
Hashtable ht = (Hashtable) result.Result;
Hashtable ht_position = (Hashtable) ht["position"];
NCService.VivaldiState vs = new NCService.VivaldiState();
vs.Position = new Point((double[]) ((ArrayList) ht_position["side"]).ToArray(typeof(double)), (double) ht_position["height"]);
vs.WeightedError = (double) ht["error"];
ForwardingSender fs = result.ResultSender as ForwardingSender;
//record this information in the request state.
RequestState request = (RequestState) _channel_to_state[q];
if (request != null) {
//make sure this is not our own reply
if (!fs.Destination.Equals(_node.Address)) {
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1}, dest: {2}", _node.Address, request.Start, fs.Destination);
#endif
request.ResultTable[fs.Destination] = new object[] {vs, (string) ht["hostname"]};
}
if (request.ResultTable.Keys.Count >= (int) request.Range*0.75) {
close_channel = true;
}
}
} catch {}
}
if (close_channel) {
q.Close();
}
}
