/// <summary>
/// Record the duration and, optionally, set the timestamp to the current time.
/// </summary>
/// <param name="telemetry">Telemetry item object to update.</param>
/// <param name="duration">The duration of the operation.</param>
private static void StopImpl(OperationTelemetry telemetry, TimeSpan duration)
{
telemetry.Duration = duration;
if (telemetry.Timestamp == DateTimeOffset.MinValue)
{
telemetry.Timestamp = PreciseTimestamp.GetUtcNow();
}
RichPayloadEventSource.Log.ProcessOperationStop(telemetry);
}
/// <summary>
/// An extension to telemetry item that initializes the timer for the respective telemetry
/// using a timestamp from a high-resolution <see cref="Stopwatch"/>.
/// </summary>
/// <param name="telemetry">Telemetry item object that calls this extension method.</param>
/// <param name="timestamp">A high-resolution timestamp from <see cref="Stopwatch"/>.</param>
public static void Start(this OperationTelemetry telemetry, long timestamp)
{
telemetry.Timestamp = PreciseTimestamp.GetUtcNow();
// Begin time is used internally for calculating duration of operation at the end call,
// and hence is stored using higher precision Clock.
// Stopwatch.GetTimestamp() is used (instead of ElapsedTicks) as it is thread-safe.
telemetry.BeginTimeInTicks = timestamp;
RichPayloadEventSource.Log.ProcessOperationStart(telemetry);
}