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Add NullObject & FileNotFound exception handling for publishing telemetry data

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This commit is contained in:
Denis-Cosmin Nutiu 2019-11-15 17:53:20 +02:00
parent 572c12d43f
commit 70c1dc290c
4 changed files with 46 additions and 19 deletions
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12
NucuCar.Sensors/EnvironmentSensor/Sensor.cs
View file

@ -104,9 +104,17 @@ namespace NucuCar.Sensors.EnvironmentSensor
$"{_lastMeasurement.Temperature:N2} \u00B0C | {_lastMeasurement.Pressure:N2} hPa | {_lastMeasurement.Humidity:N2} %rH");
}
public string GetIdentifier()
{
return nameof(EnvironmentSensor);
}
public Dictionary<string, double> GetTelemetryData()
{
return new Dictionary<string, double>
Dictionary<string, double> returnValue = null;
if (_lastMeasurement != null)
{
returnValue = new Dictionary<string, double>
{
["temperature"] = _lastMeasurement.Temperature,
["humidity"] = _lastMeasurement.Humidity,
@ -114,5 +122,7 @@ namespace NucuCar.Sensors.EnvironmentSensor
["voc"] = _lastMeasurement.VolatileOrganicCompound
};
}
return returnValue;
}
}
}

2
NucuCar.Sensors/Telemetry/ITelemetrySensor.cs
View file

@ -1,9 +1,11 @@
using System;
using System.Collections.Generic;
namespace NucuCar.Sensors.Telemetry
{
public interface ITelemetrySensor
{
string GetIdentifier();
/* Dictionary containing the topic and the value */
Dictionary<string, double> GetTelemetryData();
}

21
NucuCar.Sensors/Telemetry/TelemetryService.cs
View file

@ -53,7 +53,7 @@ namespace NucuCar.Sensors.Telemetry
jwt = Jose.JWT.Encode(new Dictionary<string, object>()
{
["iat"] = DateTime.UtcNow,
["exp"] = DateTime.UtcNow.AddMinutes(60),
["exp"] = DateTime.UtcNow.AddDays(60),
["aud"] = ProjectId
}, rsa, Jose.JwsAlgorithm.RS256);
}
@ -74,7 +74,11 @@ namespace NucuCar.Sensors.Telemetry
public async Task StartAsync()
{
var options = new ManagedMqttClientOptionsBuilder()
_logger.LogInformation("Starting the MQTT client.");
ManagedMqttClientOptions options;
try
{
options = new ManagedMqttClientOptionsBuilder()
.WithAutoReconnectDelay(TimeSpan.FromSeconds(5))
.WithClientOptions(new MqttClientOptionsBuilder()
.WithClientId($"projects/{ProjectId}/locations/{Region}/registries/{RegistryId}/devices/{DeviceId}")
@ -82,9 +86,15 @@ namespace NucuCar.Sensors.Telemetry
.WithTcpServer("mqtt.googleapis.com")
.WithTls().Build())
.Build();
}
catch (IOException e)
{
_logger.LogCritical(e.Message);
throw;
}
_logger.LogInformation("Starting the MQTT client.");
await _mqttClient.StartAsync(options);
_logger.LogInformation("Started the MQTT client!");
}
public async Task PublishDataAsync(CancellationToken cancellationToken)
@ -92,6 +102,11 @@ namespace NucuCar.Sensors.Telemetry
foreach (var sensor in _registeredSensors)
{
var data = sensor.GetTelemetryData();
if (data == null)
{
_logger.LogWarning($"Warning! Data for {sensor.GetIdentifier()} is null!");
continue;
}
await UploadData(data, cancellationToken);
}
}

6
NucuCar.Sensors/appsettings.json
View file

@ -1,16 +1,16 @@
{
"Telemetry": {
"Enabled": true,
"Interval": 5000,
"Interval": 3000,
"ProjectId": "playground-239221",
"DeviceId": "3087236321317137",
"RegistryId": "Development",
"Region": "europe-west1",
"RS256File": "Certificates\\key.key"
"RS256File": "/home/denis/Projects/RiderProjects/NucuCar/NucuCar.Sensors/Certificates/jwt.key"
},
"EnvironmentSensor": {
"Enabled": true,
"Telemetry": false,
"Telemetry": true,
"MeasurementInterval": 1000
},
"Logging": {