/// <summary>
/// Handler for receiving data from the MQTT server. This is where the main functionality is placed.
/// It simplay grabs an MQTT message, tries to parse it into a HEUCOD BasicEvent.
/// If sucecsful the data is stored in the datastore, providing it with the current time stamp.
/// Please note, this could cause expections if many services try to create events simulatanously.
/// If this happens, a random back-off and wait algorithm needs to be implented.
/// As an alternative GUID could be used as identifier. However, this has twice the length of the
/// current long - and it does not provide the same sequence which is supplied by using DateTime.UtcNow.Ticks
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
LastEvent = DateTime.Now;
// newTask.Start(() =>
try
{
var message = (Encoding.UTF8.GetString(e.Message));
//Check whether this contains a string with patientid - if not - it is not properly formatted - and worthless
if (message.ToLower().Contains("patientid"))
{
var newevent = BasicEvent.FromJson(message);
if (newevent.PatientId == "2")
{
newevent.Id = DateTime.UtcNow.Ticks.ToString();
if (newevent.SensorType.Contains("ToothBrush"))
{
Console.WriteLine("Just detected a toothbrushing event which lasted " + newevent.Value + " seconds - of type: " + newevent.SensorType);
}
if (newevent.SensorType.Contains("Bath") && newevent.Value == 1)
{
Console.WriteLine("Just detected bathroom movement of type: " + newevent.SensorType);
}
}
}
}
catch (Exception ex)
{
//TODO: Add logging in case of errors - and also implement a back-off and wait and retry - in case
//the ID is already used by the database.
Console.WriteLine("Error in service: " + ex);
Log.Logger.Error("Error while reciving event: " + ex);
}
}
private BasicEvent ParseEvent(byte[] message)
{
return(BasicEvent.FromJson(Encoding.UTF8.GetString(message)));
}