public async Task Run(
[EdgeHubTrigger("opc")] Message message,
[EdgeHub(OutputName = "dtdl")] IAsyncCollector <Message> output,
ILogger logger
)
{
byte[] messageBytes = message.GetBytes();
logger.LogInformation($"OPC-UA Message Recieved: {Encoding.UTF8.GetString(messageBytes)}");
var opcMessages = new OpcMessage[] { };
try
{
opcMessages = JsonConvert.DeserializeObject <OpcMessage[]>(Encoding.UTF8.GetString(messageBytes));
}
catch (Exception e)
{
logger.LogInformation($"Failed to deserialize opc message as an array. Exception: {e}");
logger.LogInformation($"Attempting single instance deserialization");
opcMessages[0] = JsonConvert.DeserializeObject <OpcMessage>(Encoding.UTF8.GetString(messageBytes));
}
var dtdlMessages = BuildDtdlMessage(opcMessages);
for (int i = 0; i < dtdlMessages.Length; i++)
{
var messageString = JsonConvert.SerializeObject(dtdlMessages[i]);
var outputMessageString = Encoding.UTF8.GetBytes(messageString);
var outputMessage = new Message(outputMessageString);
await output.AddAsync(outputMessage);
}
}
private static async Task <MessageResponse> ProcessOPCInput(Message message, object userContext)
{
Console.WriteLine("Processing OPC input");
var counterValue = Interlocked.Increment(ref counter);
try
{
ModuleClient deviceClient = (ModuleClient)userContext;
var opcMessage = new OpcMessage(message);
List <DynoCard> cards = new List <DynoCard>();
if (opcMessage != null)
{
// var dynoCard = await opcMessage.ToDynoCard();
// if (dynoCard.SurfaceCard != null && dynoCard.PumpCard != null)
// {
// cards.Add(dynoCard);
// Console.WriteLine("Parsing OPC dyno card values.");
// }
}
foreach (var card in cards)
{
string json = JsonConvert.SerializeObject(card);
//System.Console.WriteLine(json);
int cardID = await(new DataHelper()).PersistDynoCard(card);
if (cardID > 0)
{
card.Id = cardID;
var dynoCardMessage = card.ToDeviceMessage();
await deviceClient.SendEventAsync("output1", dynoCardMessage);
}
}
// Indicate that the message treatment is completed
return(MessageResponse.Completed);
}
catch (AggregateException ex)
{
foreach (Exception exception in ex.InnerExceptions)
{
Console.WriteLine();
Console.WriteLine("Error in OPC input: {0}", exception);
}
return(MessageResponse.Completed);
}
catch (Exception ex)
{
Console.WriteLine();
Console.WriteLine("Error in OPC input: {0}", ex.Message);
return(MessageResponse.Completed);
}
}
private static void HandleMessageReceived(object sender, OpcMessage message)
{
Log.DebugFormat("Handling message received {0}", message);
if (message.Command == OpcCommandType.SetPixels)
{
// render no more data than we can (pixel count)
for (int i = 0; i < _renderer.PixelCount; i++)
{
var r = message.Data[i * 3];
var g = message.Data[i * 3 + 1];
var b = message.Data[i * 3 + 2];
_renderer.SetPixelColor(i, r, g, b);
}
_renderer.Show();
}
}
/// <summary>
/// Creates a dyanmic object in the appropraite DTDL format
/// </summary>
/// <param name="opcMessage">The OPC-UA message to convert</param>
private dynamic BuildDtdlMessage(OpcMessage opcMessage)
{
dynamic dtdlMessage = new ExpandoObject();
var dict = (IDictionary <string, object>)dtdlMessage;
dict.Add("NodeId", ParseNodeId(opcMessage.NodeId));
if (string.IsNullOrEmpty(opcMessage.ApplicationUri))
{
dict.Add("ApplicationUri", _Options.DefaultApplicationUri);
}
else
{
dict.Add("ApplicationUri", ParseApplicationUri(opcMessage.ApplicationUri));
}
dict.Add("Status", opcMessage.Status);
dict.Add("SourceTimestamp", opcMessage.Value.SourceTimestamp);
dict.Add(opcMessage.DisplayName, opcMessage.Value.Value);
return(dtdlMessage);
}
private static void HandleMessageReceived(OpcMessage message)
{
Console.WriteLine(message.ToString(12));
}
