public async Task <Device> GetAsync(string deviceId, bool loadTwin, CancellationToken cancellationToken)
{
Device result = null;
try
{
Azure.Devices.Device device = null;
Twin twin = null;
if (loadTwin)
{
var deviceTask = this.rateLimiting.LimitRegistryOperationsAsync(
() => this.registry.GetDeviceAsync(deviceId, cancellationToken));
var twinTask = this.rateLimiting.LimitTwinReadsAsync(
() => this.registry.GetTwinAsync(deviceId, cancellationToken));
await Task.WhenAll(deviceTask, twinTask);
device = deviceTask.Result;
twin = twinTask.Result;
}
else
{
device = await this.rateLimiting.LimitRegistryOperationsAsync(
() => this.registry.GetDeviceAsync(deviceId, cancellationToken));
}
if (device != null)
{
result = new Device(device, twin, this.ioTHubHostName);
}
}
catch (Exception e)
{
if (e.InnerException != null && e.InnerException.GetType() == typeof(TaskCanceledException))
{
// We get here when the cancellation token is triggered, which is fine
this.log.Debug("Get device task canceled", () => new { deviceId, e.Message });
return(null);
}
this.log.Error("Unable to fetch the IoT device", () => new { deviceId, e });
throw new ExternalDependencyException("Unable to fetch the IoT device.");
}
if (result == null)
{
throw new ResourceNotFoundException("The device doesn't exist.");
}
return(result);
}
/// <summary>
/// Get a client for the device
/// </summary>
public IDeviceClient GetClient(Device device, IoTHubProtocol protocol, IScriptInterpreter scriptInterpreter)
{
this.SetupHub();
var sdkClient = this.GetDeviceSdkClient(device, protocol);
var methods = new DeviceMethods(sdkClient, this.log, scriptInterpreter);
return(new DeviceClient(
device.Id,
protocol,
sdkClient,
methods,
this.log));
}
// Get a client for the device
public IDeviceClient GetClient(Device device, IoTHubProtocol protocol, IScriptInterpreter scriptInterpreter)
{
this.instance.InitRequired();
var sdkClient = this.GetDeviceSdkClient(device, protocol);
var methods = new DeviceMethods(sdkClient, this.log, this.diagnosticsLogger, scriptInterpreter);
return(new DeviceClient(
device.Id,
protocol,
sdkClient,
methods,
this.log));
}
// Get a client for the device
public IDeviceClient GetClient(Device device, IoTHubProtocol protocol)
{
this.instance.InitRequired();
IDeviceClientWrapper sdkClient = this.GetDeviceSdkClient(device, protocol);
var methods = new DeviceMethods(this.config, this.log, this.diagnosticsLogger);
return(new DeviceClient(
device.Id,
protocol,
sdkClient,
methods,
this.config,
this.log));
}
private IDeviceClientWrapper GetDeviceSdkClient(Device device, IoTHubProtocol protocol)
{
var connectionString = $"HostName={device.IoTHubHostName};DeviceId={device.Id};SharedAccessKey={device.AuthPrimaryKey}";
var userAgent = config.UserAgent;
IDeviceClientWrapper sdkClient;
switch (protocol)
{
case IoTHubProtocol.AMQP:
this.log.Debug("Creating AMQP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = this.deviceClient.CreateFromConnectionString(connectionString, TransportType.Amqp_Tcp_Only, userAgent);
break;
case IoTHubProtocol.MQTT:
this.log.Debug("Creating MQTT device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = this.deviceClient.CreateFromConnectionString(connectionString, TransportType.Mqtt_Tcp_Only, userAgent);
break;
case IoTHubProtocol.HTTP:
this.log.Debug("Creating HTTP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = this.deviceClient.CreateFromConnectionString(connectionString, TransportType.Http1, userAgent);
break;
default:
this.log.Error("Unable to create a client for the given protocol",
() => new { protocol });
throw new InvalidConfigurationException($"Unable to create a client for the given protocol ({protocol})");
}
sdkClient.DisableRetryPolicy();
if (this.config.IoTHubSdkDeviceClientTimeout.HasValue)
{
sdkClient.OperationTimeoutInMilliseconds = this.config.IoTHubSdkDeviceClientTimeout.Value;
}
return(sdkClient);
}
private Azure.Devices.Client.DeviceClient GetDeviceSdkClient(Device device, IoTHubProtocol protocol)
{
var connectionString = $"HostName={device.IoTHubHostName};DeviceId={device.Id};SharedAccessKey={device.AuthPrimaryKey}";
Azure.Devices.Client.DeviceClient sdkClient;
switch (protocol)
{
case IoTHubProtocol.AMQP:
this.log.Debug("Creating AMQP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Amqp_Tcp_Only);
break;
case IoTHubProtocol.MQTT:
this.log.Debug("Creating MQTT device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Mqtt_Tcp_Only);
break;
case IoTHubProtocol.HTTP:
this.log.Debug("Creating HTTP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Http1);
break;
default:
this.log.Error("Unable to create a client for the given protocol",
() => new { protocol });
throw new InvalidConfigurationException($"Unable to create a client for the given protocol ({protocol})");
}
sdkClient.SetRetryPolicy(new Azure.Devices.Client.NoRetry());
// When sending telemetry or other operations, wait only for preconfigured number of milliseconds.
// This setting sets how throttling affects the application. The default SDK value is 4 minutes,
// that causes high CPU usage. However extreme lower values such as 10000 milliseconds causes
// memory leaks leading to simulator crashing and termination of telemetry.
sdkClient.OperationTimeoutInMilliseconds = (uint)this.servicesConfig.IoTSdkConnectTimeout;
return(sdkClient);
}
// Get the device from the registry
public async Task <Device> GetAsync(string deviceId)
{
this.instance.InitRequired();
this.log.Debug("Fetching device from registry", () => new { deviceId });
var start = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
long GetTimeSpentMsecs() => DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - start;
Device result = null;
try
{
Azure.Devices.Device device = await this.registry.GetDeviceAsync(deviceId);
if (device != null)
{
result = new Device(device, this.ioTHubHostName);
}
else
{
var timeSpentMsecs = GetTimeSpentMsecs();
this.log.Debug("Device not found", () => new { timeSpentMsecs, deviceId });
}
}
catch (Exception e) when(e is TaskCanceledException || e.InnerException is TaskCanceledException)
{
var timeSpentMsecs = GetTimeSpentMsecs();
this.log.Error("Get device task timed out", () => new { timeSpentMsecs, deviceId, e.Message });
throw new ExternalDependencyException("Get device task timed out", e);
}
catch (Exception e)
{
var timeSpentMsecs = GetTimeSpentMsecs();
const string MSG = "Unable to fetch the IoT device";
this.log.Error(MSG, () => new { timeSpentMsecs, deviceId, e });
this.diagnosticsLogger.LogServiceError(MSG, new { timeSpentMsecs, deviceId, e.Message });
throw new ExternalDependencyException(MSG);
}
return(result);
}
private Azure.Devices.Client.DeviceClient GetDeviceSdkClient(Device device, IoTHubProtocol protocol)
{
var connectionString = $"HostName={device.IoTHubHostName};DeviceId={device.Id};SharedAccessKey={device.AuthPrimaryKey}";
Azure.Devices.Client.DeviceClient sdkClient;
switch (protocol)
{
case IoTHubProtocol.AMQP:
this.log.Debug("Creating AMQP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Amqp_Tcp_Only);
break;
case IoTHubProtocol.MQTT:
this.log.Debug("Creating MQTT device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Mqtt_Tcp_Only);
break;
case IoTHubProtocol.HTTP:
this.log.Debug("Creating HTTP device client",
() => new { device.Id, device.IoTHubHostName });
sdkClient = Azure.Devices.Client.DeviceClient.CreateFromConnectionString(connectionString, TransportType.Http1);
break;
default:
this.log.Error("Unable to create a client for the given protocol",
() => new { protocol });
throw new InvalidConfigurationException($"Unable to create a client for the given protocol ({protocol})");
}
sdkClient.SetRetryPolicy(new NoRetry());
sdkClient.OperationTimeoutInMilliseconds = SDK_CLIENT_TIMEOUT;
return(sdkClient);
}
/// <summary>
/// Get the device from the registry
/// </summary>
public async Task <Device> GetAsync(string deviceId)
{
this.SetupHub();
this.log.Debug("Fetching device from registry", () => new { deviceId });
Device result = null;
var now = DateTimeOffset.UtcNow;
try
{
var device = await this.GetRegistry().GetDeviceAsync(deviceId);
if (device != null)
{
result = new Device(device, this.ioTHubHostName);
}
else
{
this.log.Debug("Device not found", () => new { deviceId });
}
}
catch (Exception e)
{
if (e.InnerException != null && e.InnerException.GetType() == typeof(TaskCanceledException))
{
var timeSpent = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - now.ToUnixTimeMilliseconds();
this.log.Error("Get device task timed out", () => new { timeSpent, deviceId, e.Message });
throw;
}
this.log.Error("Unable to fetch the IoT device", () => new { deviceId, e });
throw new ExternalDependencyException("Unable to fetch the IoT device");
}
return(result);
}
