/// <summary>
/// The client MUST be connected to access to this service.
/// Demands the server a subscription to a channel.
/// The server will check if not already subscribed and if authorized subscribe him.
/// </summary>
/// <param name="actor">channel id</param>
/// <param name="messageDelegate">An action notified when a result issued</param>
public void Subscribe(string actor, Action <HMessage> messageDelegate)
{
if (messageDelegate == null)
{
throw new MissingAttrException("messageDelegate");
}
HMessage cmdMessage = BuildCommand(actor, "hSubscribe", null, null, null);
cmdMessage.SetTimeout(options.GetMsgTimeout());
this.Send(cmdMessage, messageDelegate);
}
