/**
* Another responsibility of this interface is to calculate the time a node has to taken out of rotation
* based on the number of attempts to revive it. For very advance usecases this might be something of interest
* to provide a custom implementation for.
*/
[U] public void DeadTimeoutCalculation()
{
var dateTimeProvider = new DateTimeProvider();
/**
* The default timeout calculation is: `min(timeout * 2 ^ (attempts * 0.5 -1), maxTimeout)`
* The default values for `timeout` and `maxTimeout` are
*/
var timeout = TimeSpan.FromMinutes(1);
var maxTimeout = TimeSpan.FromMinutes(30);
/**
* Plotting these defaults looks as followed:
*
*[[timeout]]
*.Default formula, x-axis time in minutes, y-axis number of attempts to revive
* image::timeoutplot.png[dead timeout]
*
* The goal here is that whenever a node is resurected and is found to still be offline we send it
* back to the doghouse for an ever increasingly long period untill we hit a bounded maximum.
*/
var timeouts = Enumerable.Range(0, 30)
.Select(attempt => dateTimeProvider.DeadTime(attempt, timeout, maxTimeout))
.ToList();
foreach (var increasedTimeout in timeouts.Take(10))
{
increasedTimeout.Should().BeWithin(maxTimeout);
}
}
