public TResult TryExecute <TResult>(Func <TResult> actionToPerform, Func <Exception, bool> isRetryableException, int retryCount = 5, TimeSpan?retryAttempt = null, bool isLinearRetry = false)
{
var retryAttemptInSeconds = retryAttempt.HasValue ? retryAttempt.Value.Seconds : _defaultRetryAttemptInSeconds;
var policies = new Policy[]
{
Policy.Handle <Exception>(isRetryableException)
.WaitAndRetry(
// number of retries
retryCount,
// backoff
retryTimeSpan => isLinearRetry ? TimeSpan.FromSeconds(retryAttemptInSeconds) : TimeSpan.FromSeconds(Math.Pow(2, retryAttemptInSeconds)),
// on retry
(exception, timeSpan, currentRetryCount, context) =>
{
var msg = $"Retry ({currentRetryCount} of {retryCount}) due to: {exception}.";
_logger.LogWarning(msg);
_logger.LogDebug(msg);
}),
Policy.Handle <Exception>(isRetryableException)
.CircuitBreaker(
// number of exceptions before breaking circuit
_exceptionsAllowedBeforeBreaking,
// time circuit opened before retry
TimeSpan.FromMinutes(1),
(exception, duration) =>
{
// on circuit opened
_logger.LogTrace("Circuit breaker opened");
},
() =>
{
// on circuit closed
_logger.LogTrace("Circuit breaker reset");
})
};
var policyWrap = PolicyWrap.Wrap(policies);
return(policyWrap.Execute <TResult>(actionToPerform));
}