private MqttCacheTopic(IMqttConnection connection, MqttCacheTopic parent, string level)
{
_connection = connection;
Level = level;
Parent = parent;
Topic = parent.Topic == null //i.e. Root
? level
: parent.Topic + "/" + level;
var engine = Run().Replay(1, Scheduler.Immediate);
_subscription = engine.Connect();
_status = engine;
}
private int _pendingInitializers; // even if we should have only one concurrent initializer, be safer
public MqttCache(IMqttConnection connection)
{
Root = new MqttCacheTopic(connection);
}