/// <summary>
/// Iterate through the current list of subscribed clients and invoke their HandleParameters event.
/// </summary>
/// <param name="paras">The ReefANgel parameters to send to individual clients</param>
public void SendParams(ReefAngelParams paras)
{
ThreadPool.QueueUserWorkItem
(
delegate
{
lock (clients)
{
List<Guid> disconnectedClientGuids = new List<Guid>();
foreach (KeyValuePair<Guid, IReefAngelCallback> client in clients)
{
try
{
client.Value.HandleParams(paras);
}
catch (Exception)
{
// There is a number of reasons an exception can occur here.
// The server might not be able to connect to client b/c of network error,
// early client terminiation w/out being able to unsubscribe first or comms object is killed.
// No matter the case - mark the client key for removal.
disconnectedClientGuids.Add(client.Key);
}
}
foreach (Guid clientGuid in disconnectedClientGuids)
{
clients.Remove(clientGuid);
}
}
}
);
}
/// <summary>
/// Parse the XML data sent from ReefAngel Controller and build a ReefAngelParams object that will be sent to individual subscribers.
/// </summary>
/// <param name="xml">The Received XML Data</param>
/// <returns>The Current Parameter values from the controller as a ReefAngelParam object.</returns>
private ReefAngelParams GenerateCurrentParams(string xml)
{
try
{
rdr = new StringReader(xml);
XDocument xdoc = XDocument.Load(rdr, LoadOptions.None);
XElement root = xdoc.Element("RA");
currentParams = new ReefAngelParams();
currentParams.ParamTime = DateTime.Now; //TODO: For simplicity I use the systems date/time. However in the future this value should probably come from controller for consistency.
currentParams.Temp1 = FormatTemp(root.Element("T1").Value.ToString());
currentParams.Temp2 = FormatTemp(root.Element("T2").Value.ToString());
currentParams.Temp3 = FormatTemp(root.Element("T3").Value.ToString());
currentParams.PH = FormatPH(root.Element("PH").Value.ToString());
BuildRelayStatuses(ToBinary(int.Parse(root.Element("R").Value.ToString())),
ToBinary(int.Parse(root.Element("RON").Value.ToString())),
ToBinary(int.Parse(root.Element("ROFF").Value.ToString())));
return currentParams;
}
catch (Exception ex)
{
// For some reason, controller will sometimes send partial data and incomplete xml causing xmlparse to fail. Ignore it for now and send null object.
//TODO: Hanlde the correct XMLParse Exception instead of generic Exception. Log exceptions.
currentParams = null;
return currentParams;
}
}
