В Main или Init Method вашего модуля IotEdge вы должны создать ModuleClient и подключить его к MethodHandler:
AmqpTransportSettings amqpSetting = new AmqpTransportSettings(TransportType.Amqp_Tcp_Only);
ITransportSettings[] settings = { amqpSetting };
ModuleClient ioTHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings);
await ioTHubModuleClient.OpenAsync();
await ioTHubModuleClient.SetMethodHandlerAsync("MyDirectMethodName", MyDirectMethodHandler, null);
Затем вам нужно добавить DirectMethodHandler в свой модуль IotEge:
static async Task<MethodResponse> MyDirectMethodHandler(MethodRequest methodRequest, object userContext)
{
Console.WriteLine($"My direct method has been called!");
var payload = methodRequest.DataAsJson;
Console.WriteLine($"Payload: {payload}");
try
{
// perform your computation using the payload
}
catch (Exception e)
{
Console.WriteLine($"Computation failed! Error: {e.Message}");
return new MethodResponse(Encoding.UTF8.GetBytes("{\"errormessage\": \"" + e.Message + "\"}"), 500);
}
Console.WriteLine($"Computation successfull.");
return new MethodResponse(Encoding.UTF8.GetBytes("{\"status\": \"ok\"}"), 200);
}
Затем из вашего основного приложения .Net вы можете запустить прямой метод следующим образом:
var iotHubConnectionString = "MyIotHubConnectionString";
var deviceId = "MyDeviceId";
var moduleId = "MyModuleId";
var methodName = "MyDirectMethodName";
var payload = "MyJsonPayloadString";
var cloudToDeviceMethod = new CloudToDeviceMethod(methodName, TimeSpan.FromSeconds(10));
cloudToDeviceMethod.SetPayloadJson(payload);
ServiceClient serviceClient = ServiceClient.CreateFromConnectionString(iotHubConnectionString);
try
{
var methodResult = await serviceClient.InvokeDeviceMethodAsync(deviceId, moduleId, cloudToDeviceMethod);
if(methodResult.Status == 200)
{
// Handle Success
}
else if (methodResult.Status == 500)
{
// Handle Failure
}
}
catch (Exception e)
{
// Device does not exist or is offline
Console.WriteLine(e.Message);
}
person
René
schedule
11.01.2019