protected Result CheckIfShouldRevive(ServiceStatusInformation serviceInfo, out bool shouldRevive, out TimeSpan?secondsToWait)
{
shouldRevive = false;
secondsToWait = null;
// This is not likely to ever happen, without significant rewrites.
if (serviceInfo == null)
{
return(Result.SingleFatal(Fatals.KeepAliveServicePassedNullService));
}
// Try, if it has never been tried before.
DateTime?lastAttempt;
if ((lastAttempt = serviceInfo.LastAttempt) == null)
{
shouldRevive = true;
return(Result.Success);
}
Result check;
if (!(check = GetRevivalTimespan(serviceInfo, out secondsToWait)))
{
return(check);
}
var timePassed = DateTime.Now - lastAttempt.Value;
shouldRevive = timePassed >= secondsToWait;
return(check);
}
protected Result GetRevivalTimespan(ServiceStatusInformation serviceInfo, out TimeSpan?secondsToWait)
{
secondsToWait = TimeSpan.FromTicks(long.MaxValue);
// This is not likely to ever happen, without significant rewrites.
if (serviceInfo == null)
{
return(Result.SingleFatal(Fatals.KeepAliveServicePassedNullService));
}
const int baseSeconds = 5;
const double growthRate = 1.2;
var attempts = serviceInfo.FailedAttempts;
var multiplier = Math.Pow(growthRate, attempts);
secondsToWait = TimeSpan.FromSeconds(baseSeconds * multiplier);
return(Result.Success);
}