public void Invoke()
{
if (_random.Intn(100) < _value)
{
throw new Exception("Nemesis exception ヽ(`Д´)ﾉ");
}
}
/// <summary>
/// Calculate returns a random duration of time in the
/// range [0, 2^(backoffLevel-1) * <see cref="IBackoffConfig.BackoffMultiplier"/>).
/// </summary>
/// <param name="backoffConfig">Read only configuration values related to backoff.</param>
/// <param name="backoffLevel">
/// The backoff level (>= 1) used to calculate backoff duration.
/// <paramref name="backoffLevel"/> increases/decreases with successive failures/successes.
/// </param>
/// <returns>A <see cref="BackoffCalculation"/> object with the backoff duration and whether to increase
/// the backoff level.</returns>
public BackoffCalculation Calculate(IBackoffConfig backoffConfig, int backoffLevel)
{
rngOnce.Do(() =>
{
// lazily initialize the RNG
if (rng != null)
{
return;
}
rng = new RNGCryptoServiceProvider();
}
);
var backoffDuration = new TimeSpan(backoffConfig.BackoffMultiplier.Ticks *
(long)Math.Pow(2, backoffLevel - 1));
int maxBackoffMilliseconds = (int)backoffDuration.TotalMilliseconds;
int backoffMilliseconds = maxBackoffMilliseconds == 0 ? 0 : rng.Intn(maxBackoffMilliseconds);
return(new BackoffCalculation
{
Duration = TimeSpan.FromMilliseconds(backoffMilliseconds),
IncreaseBackoffLevel = backoffDuration < backoffConfig.MaxBackoffDuration
});
}
public void IntnRange()
{
Assert.Throws <ArgumentOutOfRangeException>(() => _rng.Intn(0));
Assert.Throws <ArgumentOutOfRangeException>(() => _rng.Intn(-1));
}