public async Task CreateRouteAsync(RequestContext context)
{
var client = new AzureDigitalTwinsAPIClient(new TokenCredentials(context.Token.RawData));
client.BaseUri = new Uri($"https://{context.Host}/");
_log.LogInformation($"Creating route for {context.InstanceName}");
await client.EventRoutes.AddAsync(RouteId, new Sdk.Models.EventRoute(EndpointId, filter: "true"));
}
public static async Task Run([EventHubTrigger("iothub-wsgrp", Connection = "EventHubConnectionAppSetting")] EventData[] events, ILogger log)
{
var exceptions = new List <Exception>();
if (client == null)
{
await Authenticate(log);
}
else
{
foreach (EventData eventData in events)
{
try
{
if (!flush)
{
string messageBody = Encoding.UTF8.GetString(eventData.Body.Array, eventData.Body.Offset, eventData.Body.Count);
JObject messageData = JObject.Parse(messageBody);
string deviceId = eventData.SystemProperties["iothub-connection-device-id"].ToString();
await ProcessDataForDevice(messageData, deviceId, log);
}
await Task.Yield();
}
catch (Exception e)
{
// We need to keep processing the rest of the batch - capture this exception and continue.
// Also, consider capturing details of the message that failed processing so it can be processed again later.
exceptions.Add(e);
client = null;
}
}
// Once processing of the batch is complete, if any messages in the batch failed processing throw an exception so that there is a record of the failure.
if (exceptions.Count > 1)
{
throw new AggregateException(exceptions);
}
if (exceptions.Count == 1)
{
throw exceptions.Single();
}
}
}
public async Task <bool> CheckAccessAsync()
{
if (Token == null)
{
return(false);
}
var client = new AzureDigitalTwinsAPIClient(new TokenCredentials(Token.RawData));
client.BaseUri = new Uri($"https://{Host}/");
try
{
await client.DigitalTwinModels.ListAsync(digitalTwinModelsListOptions : new DigitalTwinModelsListOptions(maxItemCount: 1));
return(true);
}
catch (Exception)
{
return(false);
}
}
public async static Task Authenticate(ILogger log)
{
var azureServiceTokenProvider = new AzureServiceTokenProvider();
string accessToken = await azureServiceTokenProvider.GetAccessTokenAsync(adtAppId);
var wc = new System.Net.Http.HttpClient();
wc.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
try
{
TokenCredentials tk = new TokenCredentials(accessToken);
client = new AzureDigitalTwinsAPIClient(tk)
{
BaseUri = new Uri(adtInstanceUrl)
};
log.LogInformation($"Azure Digital Twins client connection created.");
}
catch (Exception)
{
log.LogError($"Azure Digital Twins client connection failed.");
}
}
