private void RemoveSubscription(string id, ref int subscriptions)
{
object o;
if (Subscribers.TryRemove(id, out o))
{
if (!Subscribers.Any())
{
var variable = new List <string> {
Name
};
var parent = Parent;
while (parent != null)
{
variable.Insert(0, parent.Name);
parent = parent.Parent;
}
using (var guard = new ReaderGuard(_papperLock))
{
_papper.SetActiveState(false, variable.FirstOrDefault(), variable.Skip(1).Aggregate((a, b) => $"{a}.{b}"));
_papper.UnsubscribeDataChanges(Name, OnDataChanged);
}
}
Interlocked.Decrement(ref subscriptions);
}
foreach (var child in Childs)
{
child.Value.RemoveSubscription(id, ref subscriptions);
}
}
public static Packet AtomicValueFrom(IDataRowReader reader)
{
using (ReaderGuard rg = new ReaderGuard(reader))
{
if (reader.HasNext())
{
return(new Packet(reader.ReadNext().FetchField(0), PacketType.Atomic));
}
}
return(new Packet(null, PacketType.Atomic));
}
public static PacketArray AtomicArrayFrom(IDataRowReader reader)
{
PacketArray array = new PacketArray();
using (ReaderGuard rg = new ReaderGuard(reader))
{
while (reader.HasNext())
{
array.Add(new Packet(reader.ReadNext().FetchField(0), PacketType.Atomic));
}
}
return(array);
}
public static PacketArray DatasetArrayFrom(IDataRowReader reader)
{
PacketArray array = new PacketArray();
using (ReaderGuard rg = new ReaderGuard(reader))
{
while (reader.HasNext())
{
array.Add(new Packet(DatasetFromRow(reader.Headers, reader.ReadNext()), PacketType.Dataset));
}
}
return(array);
}
public static PacketDataset DatasetFrom(IDataRowReader reader)
{
using (ReaderGuard rg = new ReaderGuard(reader))
{
if (reader.HasNext())
{
return(DatasetFromRow(reader.Headers, reader.ReadNext()));
}
else
{
return(new PacketDataset());
}
}
}
public int AddSubscribtion(string id, IEnumerable <IEnumerable <string> > vars)
{
var updated = 0;
var varNames = new List <string>();
foreach (var variablePath in vars)
{
if (UpdateSubscribtion(id, variablePath, false, ref _subscriptions))
{
varNames.Add(variablePath.Aggregate((a, b) => $"{a}.{b}"));
updated++;
}
}
if (_subscriptions > 0 && _dataChanged != null)
{
using (var guard = new ReaderGuard(_papperLock))
{
_papper.SetActiveState(true, Name, varNames.ToArray());
_papper.SubscribeDataChanges(Name, OnDataChanged);
}
}
return(updated);
}
public int RemoveRawSubscription(string id, IEnumerable <string> adresses)
{
var updated = 0;
foreach (var address in adresses)
{
if (UpdateSubscribtion(id, new List <string> {
address
}, true, ref _subscriptions))
{
updated++;
}
}
if (_subscriptions <= 0 && _dataChanged != null)
{
using (var guard = new ReaderGuard(_papperLock))
{
_papper.SetRawActiveState(false, Name, adresses.ToArray());
_papper.UnsubscribeRawDataChanges(Name, OnDataChanged);
}
}
return(updated);
}
