public static ExceptionPolicy CircuitBreak(this PolicyBuilder<ExceptionHandler> builder, TimeSpan duration, int threshold)
{
Guard.Against.Null(builder, "builder cannot be null");
if (duration == default(TimeSpan))
throw new ArgumentOutOfRangeException("duration", "must be greater than zero");
if (threshold <= 0)
throw new ArgumentOutOfRangeException("threshold", "must be greater than zero");
var breaker = new CircuitBreaker(duration, threshold);
return new ExceptionPolicy(action => ImplementPolicy(action, builder.Condition, breaker));
}
private static void ImplementPolicy(Action action, ExceptionHandler isHandled, CircuitBreaker breaker)
{
if (breaker.IsBroken)
throw breaker.LastException;
try
{
action();
breaker.Reset();
return;
}
catch (Exception ex)
{
if (!isHandled(ex))
throw;
breaker.TryBreak(ex);
throw;
}
}