Enrich TraceEvent to include invoked function name

Here’s how we’re currently writing function invocation exceptions to Application Insights:

var logger = container.GetInstance<IExceptionLogger>();
var traceMonitor = new TraceMonitor()
    .Filter(e => e.Exception != null)
    .Subscribe(f =>
        {
            foreach (var e in f.Events.ToArray())
            {
                logger.LogException(e.Source, e.Exception.InnerException ?? e.Exception);
            }
        });

config.Tracing.Tracers.Add(traceMonitor);

The problem is that e.Source always equals to WebJobs.Execution. Is it possible to replace it with respectful function name, or add a new property if this would be a breaking change otherwise?

[abatishchev]

Please add! This will significantly improve the readability of the telemetry (we write logs and exceptions to AI).

[brettsam]

TraceEvent.Properties will now include function information – available properties found here: https://github.com/Azure/azure-webjobs-sdk/blob/master/src/Microsoft.Azure.WebJobs.Host/Loggers/TraceEventExtensions.cs