public async Task RunAsync()
{
ConsoleLogger.LogInfo($"IotHubHost={EnvironmentVariables.IotHubHost}, GatewayHost={EnvironmentVariables.EdgeHubHost}, ParentEdgeDeviceId={EnvironmentVariables.EdgeDeviceId}, LeafDevicePrefix={EnvironmentVariables.LeafDeviceIdPrefix}.");
var cancellationTokenSource = new CancellationTokenSource(TestPeriod);
var device = await DeviceManager.RetrieveDeviceAsync();
var deviceId = device.Id;
d2cMessagesTopic = string.Format(CultureInfo.InvariantCulture, TelemetryTopicPattern, deviceId);
c2dMessagesTopic = string.Format(CultureInfo.InvariantCulture, C2DMessagesTopicPattern, deviceId);
var host = EnvironmentVariables.EdgeHubHost == null ? EnvironmentVariables.IotHubHost : EnvironmentVariables.EdgeHubHost;
mqttClient = new MQTTnetClient(host, 8883, true);
mqttClient.RegisterConnectionStatusListener(this);
mqttClient.RegisterMessageHandler(this);
while (!mqttClient.IsConnected())
{
try
{
var username = $"{host}/{WebUtility.UrlEncode(deviceId)}/?api-version=2018-06-30";
var password = DeviceManager.CreateDeviceSasToken(host, deviceId, device.Authentication.SymmetricKey.PrimaryKey, Convert.ToInt32(TokenTTL.TotalSeconds));
await mqttClient.ConnectAsync(deviceId, username, password, new CancellationTokenSource(OperationTimeOut).Token);
}
catch (Exception ex)
{
ConsoleLogger.LogInfo($"Connect device {deviceId} to {host} with native MQTT client failed, retry after 1 second: {ex}");
await Task.Delay(TimeSpan.FromSeconds(1));
}
}
var subscriptions = new Dictionary <string, Qos>()
{
[$"{c2dMessagesTopic}/#"] = Qos.AtLeastOnce,
[$"{TwinUpdateTopic}/#"] = Qos.AtMostOnce,
[$"{MethodRequestTopic}/#"] = Qos.AtMostOnce
};
if (EnvironmentVariables.CustomSubscriptionTopics != null)
{
var customTopics = EnvironmentVariables.CustomSubscriptionTopics.Split(";");
foreach (var topic in customTopics)
{
subscriptions[topic] = Qos.AtLeastOnce;
}
}
await mqttClient.SubscribeAsync(subscriptions, new CancellationTokenSource(OperationTimeOut).Token);
await Task.WhenAll(D2CLoop(deviceId, cancellationTokenSource.Token), C2DLoop(deviceId, cancellationTokenSource.Token));
await mqttClient.DisconnectAsync(new CancellationTokenSource(OperationTimeOut).Token);
}