forked from toolshed/abra
refactor: urfave v3
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38
vendor/github.com/cenkalti/backoff/v4/exponential.go
generated
vendored
38
vendor/github.com/cenkalti/backoff/v4/exponential.go
generated
vendored
@ -11,17 +11,17 @@ period for each retry attempt using a randomization function that grows exponent
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NextBackOff() is calculated using the following formula:
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randomized interval =
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RetryInterval * (random value in range [1 - RandomizationFactor, 1 + RandomizationFactor])
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randomized interval =
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RetryInterval * (random value in range [1 - RandomizationFactor, 1 + RandomizationFactor])
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In other words NextBackOff() will range between the randomization factor
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percentage below and above the retry interval.
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For example, given the following parameters:
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RetryInterval = 2
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RandomizationFactor = 0.5
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Multiplier = 2
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RetryInterval = 2
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RandomizationFactor = 0.5
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Multiplier = 2
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the actual backoff period used in the next retry attempt will range between 1 and 3 seconds,
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multiplied by the exponential, that is, between 2 and 6 seconds.
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@ -36,18 +36,18 @@ The elapsed time can be reset by calling Reset().
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Example: Given the following default arguments, for 10 tries the sequence will be,
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and assuming we go over the MaxElapsedTime on the 10th try:
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Request # RetryInterval (seconds) Randomized Interval (seconds)
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Request # RetryInterval (seconds) Randomized Interval (seconds)
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1 0.5 [0.25, 0.75]
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2 0.75 [0.375, 1.125]
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3 1.125 [0.562, 1.687]
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4 1.687 [0.8435, 2.53]
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5 2.53 [1.265, 3.795]
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6 3.795 [1.897, 5.692]
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7 5.692 [2.846, 8.538]
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8 8.538 [4.269, 12.807]
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9 12.807 [6.403, 19.210]
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10 19.210 backoff.Stop
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1 0.5 [0.25, 0.75]
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2 0.75 [0.375, 1.125]
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3 1.125 [0.562, 1.687]
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4 1.687 [0.8435, 2.53]
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5 2.53 [1.265, 3.795]
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6 3.795 [1.897, 5.692]
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7 5.692 [2.846, 8.538]
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8 8.538 [4.269, 12.807]
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9 12.807 [6.403, 19.210]
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10 19.210 backoff.Stop
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Note: Implementation is not thread-safe.
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*/
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@ -167,8 +167,7 @@ func (b *ExponentialBackOff) Reset() {
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}
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// NextBackOff calculates the next backoff interval using the formula:
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//
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// Randomized interval = RetryInterval * (1 ± RandomizationFactor)
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// Randomized interval = RetryInterval * (1 ± RandomizationFactor)
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func (b *ExponentialBackOff) NextBackOff() time.Duration {
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// Make sure we have not gone over the maximum elapsed time.
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elapsed := b.GetElapsedTime()
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@ -201,8 +200,7 @@ func (b *ExponentialBackOff) incrementCurrentInterval() {
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}
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// Returns a random value from the following interval:
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//
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// [currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval].
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// [currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval].
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func getRandomValueFromInterval(randomizationFactor, random float64, currentInterval time.Duration) time.Duration {
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if randomizationFactor == 0 {
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return currentInterval // make sure no randomness is used when randomizationFactor is 0.
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