TimeIt.cs

//usage:
//TimeIt(() => Extract(sql_trades, "03_Trade_Valid_" + timestamp + ".csv"), "Trade Extract");
static bool Retry(int count, Action action, Action<int> startCallback, Func<Exception, int, bool> exceptionCallback)
{
    if (count <= 0) { return false; } else
    {
        try
        {
            startCallback(count);
            action();
            return true;
        }
        catch (Exception exc)
        {
            if (!exceptionCallback(exc, count) || count <= 0) { return false; }
            else
            {
                return Retry(count - 1, action, startCallback, exceptionCallback); //with tail recursion but C# does not emit tail. prefix
            }
        }
    }
}
static void StartCallback(int curr_count, int startCount = 10, int millisecons = 15000)
{
    if (curr_count < startCount)
    {
        Thread.Sleep(millisecons);
    }
}
static bool ExceptionCallback(string actionName, string message, Exception exc, int curr_count)
{
    if (!exc.Message.Contains(message))
    {
        Console.WriteLine(actionName + ", quitting due to error: " + exc.Message);
        return false;
    }
    Console.WriteLine(actionName + ", retry countdown #" + curr_count + ": " + exc.Message);
    return true;
}
static void TimeIt(Action action, string actionName, int count = 10, string excMessage = "The command has timed out", int millisecons = 60000)
{
    Stopwatch clock = new Stopwatch();
    clock.Start();
    bool success = Retry(count, action, curr_count => 
        StartCallback(curr_count, count, millisecons), (exc, curr_count) => ExceptionCallback(actionName, excMessage, exc, curr_count));
    clock.Stop();
    Console.WriteLine(actionName + " " + (success?"succesful":"failed") + " after  " + clock.Elapsed.TotalSeconds.ToString("0.0") + " seconds");
}