public CircuitBreakerOptions Build()
{
var circuitBreakerOptions = new CircuitBreakerOptions();
if (_circuitBreakerOptionsSection != null && _circuitBreakerOptionsSection.Exists())
{
circuitBreakerOptions = _circuitBreakerOptionsSection.Get <CircuitBreakerOptions>();
_services.Configure <CircuitBreakerOptions>(_circuitBreakerOptionsSection);
}
else
{
circuitBreakerOptions.OpenToHalfOpenWaitTimeInSeconds = _openToHalfOpenWaitTimeInSeconds;
circuitBreakerOptions.ConcurrentHalfOpenAttempts = _concurrentHalfOpenAttempts;
circuitBreakerOptions.NumberOfFailuresBeforeOpen = _numberOfFailuresBeforeOpen;
circuitBreakerOptions.NumberOfHalfOpenSuccessesToClose = _numberOfHalfOpenSuccessesToClose;
circuitBreakerOptions.SecondsOpenBeforeCriticalFailureNotification = _secondsOpenBeforeCriticalFailureNotification;
}
if (_exceptionPredicates.Count > 0)
{
_services.AddSingleton <ICircuitBreakerExceptionPredicatesProvider>(new ConfigCircuitBreakerExceptionPredicatesProvider(_exceptionPredicates));
}
_services.AddSingleton(circuitBreakerOptions);
return(circuitBreakerOptions);
}
public CircuitBreaker(ICircuitBreakerStateStore stateStore,
CircuitBreakerOptions circuitBreakerOptions,
ILogger <CircuitBreaker> logger,
ICircuitBreakerExceptionEvaluator exceptionEvaluator)
{
if (circuitBreakerOptions is null)
{
throw new ArgumentNullException(nameof(circuitBreakerOptions));
}
_stateStore = stateStore ?? throw new ArgumentNullException(nameof(stateStore));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
_exceptionEvaluator = exceptionEvaluator ?? throw new ArgumentNullException(nameof(exceptionEvaluator));
_openToHalfOpenWaitTime = TimeSpan.FromSeconds(circuitBreakerOptions.OpenToHalfOpenWaitTimeInSeconds);
_concurrentHalfOpenAttempts = circuitBreakerOptions.ConcurrentHalfOpenAttempts;
_numberOfFailuresBeforeOpen = circuitBreakerOptions.NumberOfFailuresBeforeOpen;
_numberOfHalfOpenSuccessesToClose = circuitBreakerOptions.NumberOfHalfOpenSuccessesToClose;
_timeOpenBeforeCriticalFailureNotification = TimeSpan.FromSeconds(circuitBreakerOptions.SecondsOpenBeforeCriticalFailureNotification);
_halfOpenSemaphore = new SemaphoreSlim(_concurrentHalfOpenAttempts, _concurrentHalfOpenAttempts);
_timer = new Timer(CriticalFailureNotification);
}