public static Forecast FallbackPolicyExample()
{
/*
* This example will try to call the default service, if that fails it will call an alternate service that provides
* the same information.
*/
var result = FallbackPolicy.GetFallbackPolicy(_fallbackWeatherService.GetForecast)
.Execute(() => _weatherService.GetForecast(true));
return(result);
}
public static Forecast CircuitBreakerExample(bool shouldFail = true)
{
/*
* This example will trigger a circuit breaker. It will make WeatherService unavailable for a period of time after N failures.
* As an additional example, we will combine this circuit breaker so all subsequent calls will fallback fo FallbackWeatherService
* while the circuit is broken.
*/
var fallbackPolicy = FallbackPolicy.GetFallbackPolicy(_fallbackWeatherService.GetForecast);
var policyWrap = fallbackPolicy.Wrap(CircuitBreakerPolicy.circuitBreakerPolicy);
var result = policyWrap.Execute(() => _weatherService.GetForecast(shouldFail));
return(result);
}
public static Forecast WrapPoliciesExample()
{
var retryPolicy = RetryPolicy.GetRetryPolicy(1);
var retryAndWaitPolicy = RetryPolicy.GetRetryAndWaitPolicy(1);
var fallbackPolicy = FallbackPolicy.GetFallbackPolicy(_fallbackWeatherService.GetForecast);
// Policy Wrap can combine multiple policies.
// In this example, try retrying immediately first, then wait N seconds to retry, and if that fails, use a fallback.
// Policy run order is from the latest wrapped to the first wrapped.
// This will execute retry, then retryAndWait and finally fallback.
var policyWrap = fallbackPolicy.Wrap(retryAndWaitPolicy).Wrap(retryPolicy);
var result = policyWrap.Execute(() => _weatherService.GetForecast(true));
return(result);
}