The AppInsightsActivityListener listens for standard .NET System.Diagnostics.Activity and creates ApplicationInsights telemetry that corresponds to it, reducing the effort needed to instrument code.
The .NET libraries already emit the telemetry if there is a listener, so just adding this listener will send telemetry to an Application Insights workspace through the use of standard libraries such as the HttpClient. Adding you can create your own Activity instances to instrument your code as well, and it will be correlated within the disposable Activity instance's lifetime.
- Traces
- Events
- Baggage
- Tags
Traces are created for any ILogger calls and will be correlated if they are created within a parent Activity. An Activity may also create Events that occur throughout the course of the Activity and these will send events to Application Insights that are correlated with the Activity.
It's often useful to enrich an Activity with metadata to enable searching the telemetry, so Activity supports setting Baggage and Tags. Because baggage is passed down to nested activities, baggage created in a parent will be included in all the Application Insights telemetry created within that parent's scope. Tags are not passed down to child scopes.
let services = ServiceCollection()
services.AddAppInsightsActivityListener(fun opts -> opts.AddSource("MyApp").AddSource("System.Net.Http") |> ignore)
.AddLogging(fun builder ->
builder.SetMinimumLevel(LogLevel.Debug)
.AddFilter<ApplicationInsightsLoggerProvider>("", LogLevel.Information)
.AddFilter<ApplicationInsightsLoggerProvider>("Category", LogLevel.Information)
|> ignore) |> ignore
services.AddApplicationInsightsTelemetryWorkerService(fun options -> options.ConnectionString <- appInsightsConnStr) |> ignore
let serviceProvider = services.BuildServiceProvider()
let logger = serviceProvider.GetRequiredService<ILogger<Test>>()
let telemetryClient = serviceProvider.GetRequiredService<TelemetryClient>()
let activityListener = serviceProvider.GetRequiredService<AppInsightsActivityListener>()