public void ApplyPatterns(EndpointTelemetryConfiguration telemetryConfiguration)
{
if (telemetryConfiguration.EndpointUrl.Publish == true)
{
EndpointUrl = telemetryConfiguration.EndpointUrl.PatternMatch(EndpointUrl);
}
if (telemetryConfiguration.NodeId.Publish == true)
{
NodeId = telemetryConfiguration.NodeId.PatternMatch(NodeId);
}
if (telemetryConfiguration.MonitoredItem.ApplicationUri.Publish == true)
{
ApplicationUri = telemetryConfiguration.MonitoredItem.ApplicationUri.PatternMatch(ApplicationUri);
}
if (telemetryConfiguration.MonitoredItem.DisplayName.Publish == true)
{
DisplayName = telemetryConfiguration.MonitoredItem.DisplayName.PatternMatch(DisplayName);
}
if (telemetryConfiguration.Value.Value.Publish == true)
{
Value = telemetryConfiguration.Value.Value.PatternMatch(Value);
}
if (telemetryConfiguration.Value.SourceTimestamp.Publish == true)
{
SourceTimestamp = telemetryConfiguration.Value.SourceTimestamp.PatternMatch(SourceTimestamp);
}
if (telemetryConfiguration.Value.StatusCode.Publish == true && StatusCode != null)
{
if (!string.IsNullOrEmpty(telemetryConfiguration.Value.StatusCode.Pattern))
{
Logger.Information($"'Pattern' settngs for StatusCode are ignored.");
}
}
if (telemetryConfiguration.Value.Status.Publish == true)
{
Status = telemetryConfiguration.Value.Status.PatternMatch(Status);
}
}
/// <summary>
/// The notification that the data for a monitored item has changed on an OPC UA server.
/// </summary>
public void MonitoredItemNotificationEventHandler(MonitoredItem monitoredItem, MonitoredItemNotificationEventArgs e)
{
try
{
if (e == null || e.NotificationValue == null || monitoredItem == null || monitoredItem.Subscription == null || monitoredItem.Subscription.Session == null)
{
return;
}
if (!(e.NotificationValue is MonitoredItemNotification notification))
{
return;
}
if (!(notification.Value is DataValue value))
{
return;
}
MessageData messageData = new MessageData();
if (IotCentralMode)
{
// for IoTCentral we use the DisplayName as the key in the telemetry and the Value as the value.
if (monitoredItem.DisplayName != null)
{
// use the DisplayName as reported in the MonitoredItem
messageData.DisplayName = monitoredItem.DisplayName;
}
if (value.Value != null)
{
// use the Value as reported in the notification event argument encoded with the OPC UA JSON endcoder
JsonEncoder encoder = new JsonEncoder(monitoredItem.Subscription.Session.MessageContext, false);
value.ServerTimestamp = DateTime.MinValue;
value.SourceTimestamp = DateTime.MinValue;
value.StatusCode = StatusCodes.Good;
encoder.WriteDataValue("Value", value);
string valueString = encoder.CloseAndReturnText();
// we only want the value string, search for everything till the real value starts
// and get it
string marker = "{\"Value\":{\"Value\":";
int markerStart = valueString.IndexOf(marker, StringComparison.InvariantCulture);
messageData.PreserveValueQuotes = true;
if (markerStart >= 0)
{
// we either have a value in quotes or just a value
int valueLength;
int valueStart = marker.Length;
if (valueString.IndexOf("\"", valueStart, StringComparison.InvariantCulture) >= 0)
{
// value is in quotes and two closing curly brackets at the end
valueStart++;
valueLength = valueString.Length - valueStart - 3;
}
else
{
// value is without quotes with two curly brackets at the end
valueLength = valueString.Length - marker.Length - 2;
messageData.PreserveValueQuotes = false;
}
messageData.Value = valueString.Substring(valueStart, valueLength);
}
Logger.Debug($" IoTCentral key: {messageData.DisplayName}");
Logger.Debug($" IoTCentral values: {messageData.Value}");
}
}
else
{
// update the required message data to pass only the required data to HubCommunication
EndpointTelemetryConfiguration telemetryConfiguration = GetEndpointTelemetryConfiguration(EndpointUrl);
// the endpoint URL is required to allow HubCommunication lookup the telemetry configuration
messageData.EndpointUrl = EndpointUrl;
if (telemetryConfiguration.NodeId.Publish == true)
{
messageData.NodeId = OriginalId;
}
if (telemetryConfiguration.MonitoredItem.ApplicationUri.Publish == true)
{
messageData.ApplicationUri = (monitoredItem.Subscription.Session.Endpoint.Server.ApplicationUri + (string.IsNullOrEmpty(OpcSession.PublisherSite) ? "" : $":{OpcSession.PublisherSite}"));
}
if (telemetryConfiguration.MonitoredItem.DisplayName.Publish == true && monitoredItem.DisplayName != null)
{
// use the DisplayName as reported in the MonitoredItem
messageData.DisplayName = monitoredItem.DisplayName;
}
if (telemetryConfiguration.Value.SourceTimestamp.Publish == true && value.SourceTimestamp != null)
{
// use the SourceTimestamp as reported in the notification event argument in ISO8601 format
messageData.SourceTimestamp = value.SourceTimestamp.ToString("o", CultureInfo.InvariantCulture);
}
if (telemetryConfiguration.Value.StatusCode.Publish == true && value.StatusCode != null)
{
// use the StatusCode as reported in the notification event argument
messageData.StatusCode = value.StatusCode.Code;
}
if (telemetryConfiguration.Value.Status.Publish == true && value.StatusCode != null)
{
// use the StatusCode as reported in the notification event argument to lookup the symbolic name
messageData.Status = StatusCode.LookupSymbolicId(value.StatusCode.Code);
}
if (telemetryConfiguration.Value.Value.Publish == true && value.Value != null)
{
// use the Value as reported in the notification event argument encoded with the OPC UA JSON endcoder
JsonEncoder encoder = new JsonEncoder(monitoredItem.Subscription.Session.MessageContext, false);
value.ServerTimestamp = DateTime.MinValue;
value.SourceTimestamp = DateTime.MinValue;
value.StatusCode = StatusCodes.Good;
encoder.WriteDataValue("Value", value);
string valueString = encoder.CloseAndReturnText();
// we only want the value string, search for everything till the real value starts
// and get it
string marker = "{\"Value\":{\"Value\":";
int markerStart = valueString.IndexOf(marker, StringComparison.InvariantCulture);
messageData.PreserveValueQuotes = true;
if (markerStart >= 0)
{
// we either have a value in quotes or just a value
int valueLength;
int valueStart = marker.Length;
if (valueString.IndexOf("\"", valueStart, StringComparison.InvariantCulture) >= 0)
{
// value is in quotes and two closing curly brackets at the end
valueStart++;
valueLength = valueString.Length - valueStart - 3;
}
else
{
// value is without quotes with two curly brackets at the end
valueLength = valueString.Length - marker.Length - 2;
messageData.PreserveValueQuotes = false;
}
messageData.Value = valueString.Substring(valueStart, valueLength);
}
}
// currently the pattern processing is done here, which adds runtime to the notification processing.
// In case of perf issues it can be also done in CreateJsonMessageAsync of IoTHubMessaging.cs.
// apply patterns
messageData.ApplyPatterns(telemetryConfiguration);
Logger.Debug($" ApplicationUri: {messageData.ApplicationUri}");
Logger.Debug($" EndpointUrl: {messageData.EndpointUrl}");
Logger.Debug($" DisplayName: {messageData.DisplayName}");
Logger.Debug($" Value: {messageData.Value}");
}
// add message to fifo send queue
if (monitoredItem.Subscription == null)
{
Logger.Debug($"Subscription already removed. No more details available.");
}
else
{
Logger.Debug($"Enqueue a new message from subscription {(monitoredItem.Subscription == null ? "removed" : monitoredItem.Subscription.Id.ToString(CultureInfo.InvariantCulture))}");
Logger.Debug($" with publishing interval: {monitoredItem.Subscription.PublishingInterval} and sampling interval: {monitoredItem.SamplingInterval}):");
}
HubCommunication.Enqueue(messageData);
}
catch (Exception ex)
{
Logger.Error(ex, "Error processing monitored item notification");
}
}
