private async Task <T> SendDropEtwEvent <T>(Task <T> task) where T : DropOperationBaseEvent
{
long startTime = DateTime.UtcNow.Ticks;
T dropEvent = null;
try
{
dropEvent = await task;
return(dropEvent);
}
finally
{
// if 'task' failed, create an event indicating an error
if (dropEvent == null)
{
dropEvent = Activator.CreateInstance <T>();
dropEvent.Succeeded = false;
dropEvent.ErrorMessage = "internal error";
}
// common properties: execution time, drop type, drop url
dropEvent.ElapsedTimeTicks = DateTime.UtcNow.Ticks - startTime;
dropEvent.DropType = "VsoDrop";
if (m_dropClientTask.IsCompleted && !m_dropClientTask.IsFaulted)
{
dropEvent.DropUrl = (await m_dropClientTask).DropUrl;
}
// send event
m_etwLogger.Log(dropEvent);
}
}
/// <summary>
/// Logs a generic <see cref="DropOperationBaseEvent"/> by delegating based on the type of <paramref name="e"/>.
/// </summary>
public static void Log(this ICloudBuildLogger logger, DropOperationBaseEvent e)
{
switch (e.Kind)
{
case EventKind.DropCreation:
logger.Log((DropCreationEvent)e);
return;
case EventKind.DropFinalization:
logger.Log((DropFinalizationEvent)e);
return;
default:
Contract.Assert(false, "Unsupported " + nameof(DropOperationBaseEvent) + " " + e.Kind);
return;
}
}