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@hyrmn hyrmn/oldway.cs
Last active Sep 23, 2019

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Polly.Contrib.WaitAndRetry examples
var transientErrors = new HashSet<WebExceptionStatus>(new[]
{
WebExceptionStatus.ConnectFailure,
WebExceptionStatus.ConnectionClosed,
WebExceptionStatus.KeepAliveFailure,
WebExceptionStatus.Pending,
WebExceptionStatus.PipelineFailure,
WebExceptionStatus.ProtocolError,
WebExceptionStatus.ReceiveFailure,
WebExceptionStatus.RequestCanceled,
WebExceptionStatus.SecureChannelFailure,
WebExceptionStatus.SendFailure,
WebExceptionStatus.Timeout
});
var retryTimes = new List<TimeSpan>
{
TimeSpan.FromMilliseconds(0),
TimeSpan.FromMilliseconds(50),
TimeSpan.FromMilliseconds(100),
TimeSpan.FromMilliseconds(150)
};
var retryPolicy = Policy
.Handle<WebException>(ex => transientErrors.Contains(ex.Status))
.OrInner<WebException>(ex => transientErrors.Contains(ex.Status))
.Or<TimeoutException>()
.OrInner<TimeoutException>()
.WaitAndRetry(retryTimes,
(exception, timeSpan, retryCount, context) =>
{
LogTo.Warning(
exception,
"WARNING: Unable to save to Raven, will retry after {RetryTimeSpan}, Retry attempt {RetryCount}",
timeSpan,
retryCount);
});
var constant = Backoff.ConstantBackoff(TimeSpan.FromMilliseconds(100), retryCount: 5, fastFirst: true);
var constantPolicy = Policy
.Handle<FooException>()
.WaitAndRetryAsync(constant);
var linear = Backoff.LinearBackoff(TimeSpan.FromMilliseconds(50), retryCount: 5, fastFirst: true);
var linearPolicy = Policy
.Handle<FooException>()
.WaitAndRetryAsync(linear);
var exponential = Backoff.ExponentialBackoff(TimeSpan.FromMilliseconds(20), retryCount: 5, fastFirst: true);
var exponentialPolicy = Policy
.Handle<FooException>()
.WaitAndRetryAsync(exponential);
var jittered = Backoff.DecorrelatedJitterBackoffV2(
medianFirstDelay: TimeSpan.FromMilliseconds(50)
retryCount: 5,
fastFirst: true);
var jitteredPolicy = Policy
.Handle<FooException>()
.WaitAndRetryAsync(jittered);
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