Using Application Insights in a worker role using OWIN Web API 2

Question

Hi,
Great work, I'm wondering if you had any guidance on using Application Insights with a worker role hosted Web API 2 application using OWIN ?
I'm planning to create a Delegating Handler as you don't have a Begin_Request event to issue the  ServerAnalytics.BeginRequest but anyone thoughts or guidance would be appreciated.
We are planning to try it out over the next few days so I'll report back my findings then.
Thanks
John

Answer 1

You can start with this (just an example, please adjust to your needs):
public class ApplicationInsightsHandler : DelegatingHandler
private TelemetryClient telemetryClient;
public ApplicationInsightsHandler()
this.telemetryClient = new TelemetryClient();
protected override Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
DateTimeOffset start = DateTime.Now;
return base.SendAsync(request, cancellationToken)
.ContinueWith<HttpResponseMessage>((responseToCompleteTask) =>
HttpResponseMessage response = responseToCompleteTask.Result;
int statusCode = (int)response.StatusCode;
this.telemetryClient.TrackRequest(request.RequestUri.AbsolutePath,
start, DateTimeOffset.Now - start,
statusCode.ToString(),
statusCode < 400);
return response;
Anastasia