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28 lines
682 B
Go
28 lines
682 B
Go
package backoff
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import (
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"math"
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"time"
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"github.com/hetznercloud/hcloud-go/v2/hcloud"
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)
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// From https://github.com/hetznercloud/terraform-provider-hcloud/blob/v1.46.1/internal/control/retry.go
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// Copyright (c) Hetzner Cloud GmbH
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// ExponentialBackoffWithLimit returns a [hcloud.BackoffFunc] which implements an exponential
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// backoff.
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// It uses the formula:
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//
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// min(b^retries * d, limit)
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func ExponentialBackoffWithLimit(b float64, d time.Duration, limit time.Duration) hcloud.BackoffFunc {
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return func(retries int) time.Duration {
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current := time.Duration(math.Pow(b, float64(retries))) * d
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if current > limit {
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return limit
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} else {
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return current
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}
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}
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}
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