diff options
Diffstat (limited to 'vendor/github.com/cenkalti/backoff')
14 files changed, 357 insertions, 493 deletions
diff --git a/vendor/github.com/cenkalti/backoff/v4/context.go b/vendor/github.com/cenkalti/backoff/v4/context.go deleted file mode 100644 index 48482330e..000000000 --- a/vendor/github.com/cenkalti/backoff/v4/context.go +++ /dev/null @@ -1,62 +0,0 @@ -package backoff - -import ( - "context" - "time" -) - -// BackOffContext is a backoff policy that stops retrying after the context -// is canceled. -type BackOffContext interface { // nolint: golint - BackOff - Context() context.Context -} - -type backOffContext struct { - BackOff - ctx context.Context -} - -// WithContext returns a BackOffContext with context ctx -// -// ctx must not be nil -func WithContext(b BackOff, ctx context.Context) BackOffContext { // nolint: golint - if ctx == nil { - panic("nil context") - } - - if b, ok := b.(*backOffContext); ok { - return &backOffContext{ - BackOff: b.BackOff, - ctx: ctx, - } - } - - return &backOffContext{ - BackOff: b, - ctx: ctx, - } -} - -func getContext(b BackOff) context.Context { - if cb, ok := b.(BackOffContext); ok { - return cb.Context() - } - if tb, ok := b.(*backOffTries); ok { - return getContext(tb.delegate) - } - return context.Background() -} - -func (b *backOffContext) Context() context.Context { - return b.ctx -} - -func (b *backOffContext) NextBackOff() time.Duration { - select { - case <-b.ctx.Done(): - return Stop - default: - return b.BackOff.NextBackOff() - } -} diff --git a/vendor/github.com/cenkalti/backoff/v4/exponential.go b/vendor/github.com/cenkalti/backoff/v4/exponential.go deleted file mode 100644 index aac99f196..000000000 --- a/vendor/github.com/cenkalti/backoff/v4/exponential.go +++ /dev/null @@ -1,216 +0,0 @@ -package backoff - -import ( - "math/rand" - "time" -) - -/* -ExponentialBackOff is a backoff implementation that increases the backoff -period for each retry attempt using a randomization function that grows exponentially. - -NextBackOff() is calculated using the following formula: - - randomized interval = - RetryInterval * (random value in range [1 - RandomizationFactor, 1 + RandomizationFactor]) - -In other words NextBackOff() will range between the randomization factor -percentage below and above the retry interval. - -For example, given the following parameters: - - RetryInterval = 2 - RandomizationFactor = 0.5 - Multiplier = 2 - -the actual backoff period used in the next retry attempt will range between 1 and 3 seconds, -multiplied by the exponential, that is, between 2 and 6 seconds. - -Note: MaxInterval caps the RetryInterval and not the randomized interval. - -If the time elapsed since an ExponentialBackOff instance is created goes past the -MaxElapsedTime, then the method NextBackOff() starts returning backoff.Stop. - -The elapsed time can be reset by calling Reset(). - -Example: Given the following default arguments, for 10 tries the sequence will be, -and assuming we go over the MaxElapsedTime on the 10th try: - - Request # RetryInterval (seconds) Randomized Interval (seconds) - - 1 0.5 [0.25, 0.75] - 2 0.75 [0.375, 1.125] - 3 1.125 [0.562, 1.687] - 4 1.687 [0.8435, 2.53] - 5 2.53 [1.265, 3.795] - 6 3.795 [1.897, 5.692] - 7 5.692 [2.846, 8.538] - 8 8.538 [4.269, 12.807] - 9 12.807 [6.403, 19.210] - 10 19.210 backoff.Stop - -Note: Implementation is not thread-safe. -*/ -type ExponentialBackOff struct { - InitialInterval time.Duration - RandomizationFactor float64 - Multiplier float64 - MaxInterval time.Duration - // After MaxElapsedTime the ExponentialBackOff returns Stop. - // It never stops if MaxElapsedTime == 0. - MaxElapsedTime time.Duration - Stop time.Duration - Clock Clock - - currentInterval time.Duration - startTime time.Time -} - -// Clock is an interface that returns current time for BackOff. -type Clock interface { - Now() time.Time -} - -// ExponentialBackOffOpts is a function type used to configure ExponentialBackOff options. -type ExponentialBackOffOpts func(*ExponentialBackOff) - -// Default values for ExponentialBackOff. -const ( - DefaultInitialInterval = 500 * time.Millisecond - DefaultRandomizationFactor = 0.5 - DefaultMultiplier = 1.5 - DefaultMaxInterval = 60 * time.Second - DefaultMaxElapsedTime = 15 * time.Minute -) - -// NewExponentialBackOff creates an instance of ExponentialBackOff using default values. -func NewExponentialBackOff(opts ...ExponentialBackOffOpts) *ExponentialBackOff { - b := &ExponentialBackOff{ - InitialInterval: DefaultInitialInterval, - RandomizationFactor: DefaultRandomizationFactor, - Multiplier: DefaultMultiplier, - MaxInterval: DefaultMaxInterval, - MaxElapsedTime: DefaultMaxElapsedTime, - Stop: Stop, - Clock: SystemClock, - } - for _, fn := range opts { - fn(b) - } - b.Reset() - return b -} - -// WithInitialInterval sets the initial interval between retries. -func WithInitialInterval(duration time.Duration) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.InitialInterval = duration - } -} - -// WithRandomizationFactor sets the randomization factor to add jitter to intervals. -func WithRandomizationFactor(randomizationFactor float64) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.RandomizationFactor = randomizationFactor - } -} - -// WithMultiplier sets the multiplier for increasing the interval after each retry. -func WithMultiplier(multiplier float64) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.Multiplier = multiplier - } -} - -// WithMaxInterval sets the maximum interval between retries. -func WithMaxInterval(duration time.Duration) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.MaxInterval = duration - } -} - -// WithMaxElapsedTime sets the maximum total time for retries. -func WithMaxElapsedTime(duration time.Duration) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.MaxElapsedTime = duration - } -} - -// WithRetryStopDuration sets the duration after which retries should stop. -func WithRetryStopDuration(duration time.Duration) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.Stop = duration - } -} - -// WithClockProvider sets the clock used to measure time. -func WithClockProvider(clock Clock) ExponentialBackOffOpts { - return func(ebo *ExponentialBackOff) { - ebo.Clock = clock - } -} - -type systemClock struct{} - -func (t systemClock) Now() time.Time { - return time.Now() -} - -// SystemClock implements Clock interface that uses time.Now(). -var SystemClock = systemClock{} - -// Reset the interval back to the initial retry interval and restarts the timer. -// Reset must be called before using b. -func (b *ExponentialBackOff) Reset() { - b.currentInterval = b.InitialInterval - b.startTime = b.Clock.Now() -} - -// NextBackOff calculates the next backoff interval using the formula: -// Randomized interval = RetryInterval * (1 ± RandomizationFactor) -func (b *ExponentialBackOff) NextBackOff() time.Duration { - // Make sure we have not gone over the maximum elapsed time. - elapsed := b.GetElapsedTime() - next := getRandomValueFromInterval(b.RandomizationFactor, rand.Float64(), b.currentInterval) - b.incrementCurrentInterval() - if b.MaxElapsedTime != 0 && elapsed+next > b.MaxElapsedTime { - return b.Stop - } - return next -} - -// GetElapsedTime returns the elapsed time since an ExponentialBackOff instance -// is created and is reset when Reset() is called. -// -// The elapsed time is computed using time.Now().UnixNano(). It is -// safe to call even while the backoff policy is used by a running -// ticker. -func (b *ExponentialBackOff) GetElapsedTime() time.Duration { - return b.Clock.Now().Sub(b.startTime) -} - -// Increments the current interval by multiplying it with the multiplier. -func (b *ExponentialBackOff) incrementCurrentInterval() { - // Check for overflow, if overflow is detected set the current interval to the max interval. - if float64(b.currentInterval) >= float64(b.MaxInterval)/b.Multiplier { - b.currentInterval = b.MaxInterval - } else { - b.currentInterval = time.Duration(float64(b.currentInterval) * b.Multiplier) - } -} - -// Returns a random value from the following interval: -// [currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval]. -func getRandomValueFromInterval(randomizationFactor, random float64, currentInterval time.Duration) time.Duration { - if randomizationFactor == 0 { - return currentInterval // make sure no randomness is used when randomizationFactor is 0. - } - var delta = randomizationFactor * float64(currentInterval) - var minInterval = float64(currentInterval) - delta - var maxInterval = float64(currentInterval) + delta - - // Get a random value from the range [minInterval, maxInterval]. - // The formula used below has a +1 because if the minInterval is 1 and the maxInterval is 3 then - // we want a 33% chance for selecting either 1, 2 or 3. - return time.Duration(minInterval + (random * (maxInterval - minInterval + 1))) -} diff --git a/vendor/github.com/cenkalti/backoff/v4/retry.go b/vendor/github.com/cenkalti/backoff/v4/retry.go deleted file mode 100644 index b9c0c51cd..000000000 --- a/vendor/github.com/cenkalti/backoff/v4/retry.go +++ /dev/null @@ -1,146 +0,0 @@ -package backoff - -import ( - "errors" - "time" -) - -// An OperationWithData is executing by RetryWithData() or RetryNotifyWithData(). -// The operation will be retried using a backoff policy if it returns an error. -type OperationWithData[T any] func() (T, error) - -// An Operation is executing by Retry() or RetryNotify(). -// The operation will be retried using a backoff policy if it returns an error. -type Operation func() error - -func (o Operation) withEmptyData() OperationWithData[struct{}] { - return func() (struct{}, error) { - return struct{}{}, o() - } -} - -// Notify is a notify-on-error function. It receives an operation error and -// backoff delay if the operation failed (with an error). -// -// NOTE that if the backoff policy stated to stop retrying, -// the notify function isn't called. -type Notify func(error, time.Duration) - -// Retry the operation o until it does not return error or BackOff stops. -// o is guaranteed to be run at least once. -// -// If o returns a *PermanentError, the operation is not retried, and the -// wrapped error is returned. -// -// Retry sleeps the goroutine for the duration returned by BackOff after a -// failed operation returns. -func Retry(o Operation, b BackOff) error { - return RetryNotify(o, b, nil) -} - -// RetryWithData is like Retry but returns data in the response too. -func RetryWithData[T any](o OperationWithData[T], b BackOff) (T, error) { - return RetryNotifyWithData(o, b, nil) -} - -// RetryNotify calls notify function with the error and wait duration -// for each failed attempt before sleep. -func RetryNotify(operation Operation, b BackOff, notify Notify) error { - return RetryNotifyWithTimer(operation, b, notify, nil) -} - -// RetryNotifyWithData is like RetryNotify but returns data in the response too. -func RetryNotifyWithData[T any](operation OperationWithData[T], b BackOff, notify Notify) (T, error) { - return doRetryNotify(operation, b, notify, nil) -} - -// RetryNotifyWithTimer calls notify function with the error and wait duration using the given Timer -// for each failed attempt before sleep. -// A default timer that uses system timer is used when nil is passed. -func RetryNotifyWithTimer(operation Operation, b BackOff, notify Notify, t Timer) error { - _, err := doRetryNotify(operation.withEmptyData(), b, notify, t) - return err -} - -// RetryNotifyWithTimerAndData is like RetryNotifyWithTimer but returns data in the response too. -func RetryNotifyWithTimerAndData[T any](operation OperationWithData[T], b BackOff, notify Notify, t Timer) (T, error) { - return doRetryNotify(operation, b, notify, t) -} - -func doRetryNotify[T any](operation OperationWithData[T], b BackOff, notify Notify, t Timer) (T, error) { - var ( - err error - next time.Duration - res T - ) - if t == nil { - t = &defaultTimer{} - } - - defer func() { - t.Stop() - }() - - ctx := getContext(b) - - b.Reset() - for { - res, err = operation() - if err == nil { - return res, nil - } - - var permanent *PermanentError - if errors.As(err, &permanent) { - return res, permanent.Err - } - - if next = b.NextBackOff(); next == Stop { - if cerr := ctx.Err(); cerr != nil { - return res, cerr - } - - return res, err - } - - if notify != nil { - notify(err, next) - } - - t.Start(next) - - select { - case <-ctx.Done(): - return res, ctx.Err() - case <-t.C(): - } - } -} - -// PermanentError signals that the operation should not be retried. -type PermanentError struct { - Err error -} - -func (e *PermanentError) Error() string { - return e.Err.Error() -} - -func (e *PermanentError) Unwrap() error { - return e.Err -} - -func (e *PermanentError) Is(target error) bool { - _, ok := target.(*PermanentError) - return ok -} - -// Permanent wraps the given err in a *PermanentError. -func Permanent(err error) error { - if err == nil { - return nil - } - return &PermanentError{ - Err: err, - } -} diff --git a/vendor/github.com/cenkalti/backoff/v4/tries.go b/vendor/github.com/cenkalti/backoff/v4/tries.go deleted file mode 100644 index 28d58ca37..000000000 --- a/vendor/github.com/cenkalti/backoff/v4/tries.go +++ /dev/null @@ -1,38 +0,0 @@ -package backoff - -import "time" - -/* -WithMaxRetries creates a wrapper around another BackOff, which will -return Stop if NextBackOff() has been called too many times since -the last time Reset() was called - -Note: Implementation is not thread-safe. -*/ -func WithMaxRetries(b BackOff, max uint64) BackOff { - return &backOffTries{delegate: b, maxTries: max} -} - -type backOffTries struct { - delegate BackOff - maxTries uint64 - numTries uint64 -} - -func (b *backOffTries) NextBackOff() time.Duration { - if b.maxTries == 0 { - return Stop - } - if b.maxTries > 0 { - if b.maxTries <= b.numTries { - return Stop - } - b.numTries++ - } - return b.delegate.NextBackOff() -} - -func (b *backOffTries) Reset() { - b.numTries = 0 - b.delegate.Reset() -} diff --git a/vendor/github.com/cenkalti/backoff/v4/.gitignore b/vendor/github.com/cenkalti/backoff/v5/.gitignore index 50d95c548..50d95c548 100644 --- a/vendor/github.com/cenkalti/backoff/v4/.gitignore +++ b/vendor/github.com/cenkalti/backoff/v5/.gitignore diff --git a/vendor/github.com/cenkalti/backoff/v5/CHANGELOG.md b/vendor/github.com/cenkalti/backoff/v5/CHANGELOG.md new file mode 100644 index 000000000..658c37436 --- /dev/null +++ b/vendor/github.com/cenkalti/backoff/v5/CHANGELOG.md @@ -0,0 +1,29 @@ +# Changelog + +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), +and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). + +## [5.0.0] - 2024-12-19 + +### Added + +- RetryAfterError can be returned from an operation to indicate how long to wait before the next retry. + +### Changed + +- Retry function now accepts additional options for specifying max number of tries and max elapsed time. +- Retry function now accepts a context.Context. +- Operation function signature changed to return result (any type) and error. + +### Removed + +- RetryNotify* and RetryWithData functions. Only single Retry function remains. +- Optional arguments from ExponentialBackoff constructor. +- Clock and Timer interfaces. + +### Fixed + +- The original error is returned from Retry if there's a PermanentError. (#144) +- The Retry function respects the wrapped PermanentError. (#140) diff --git a/vendor/github.com/cenkalti/backoff/v4/LICENSE b/vendor/github.com/cenkalti/backoff/v5/LICENSE index 89b817996..89b817996 100644 --- a/vendor/github.com/cenkalti/backoff/v4/LICENSE +++ b/vendor/github.com/cenkalti/backoff/v5/LICENSE diff --git a/vendor/github.com/cenkalti/backoff/v4/README.md b/vendor/github.com/cenkalti/backoff/v5/README.md index 9433004a2..4611b1d17 100644 --- a/vendor/github.com/cenkalti/backoff/v4/README.md +++ b/vendor/github.com/cenkalti/backoff/v5/README.md @@ -1,4 +1,4 @@ -# Exponential Backoff [![GoDoc][godoc image]][godoc] [![Coverage Status][coveralls image]][coveralls] +# Exponential Backoff [![GoDoc][godoc image]][godoc] This is a Go port of the exponential backoff algorithm from [Google's HTTP Client Library for Java][google-http-java-client]. @@ -9,9 +9,11 @@ The retries exponentially increase and stop increasing when a certain threshold ## Usage -Import path is `github.com/cenkalti/backoff/v4`. Please note the version part at the end. +Import path is `github.com/cenkalti/backoff/v5`. Please note the version part at the end. -Use https://pkg.go.dev/github.com/cenkalti/backoff/v4 to view the documentation. +For most cases, use `Retry` function. See [example_test.go][example] for an example. + +If you have specific needs, copy `Retry` function (from [retry.go][retry-src]) into your code and modify it as needed. ## Contributing @@ -19,12 +21,11 @@ Use https://pkg.go.dev/github.com/cenkalti/backoff/v4 to view the documentation. * Please don't send a PR without opening an issue and discussing it first. * If proposed change is not a common use case, I will probably not accept it. -[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v4 +[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v5 [godoc image]: https://godoc.org/github.com/cenkalti/backoff?status.png -[coveralls]: https://coveralls.io/github/cenkalti/backoff?branch=master -[coveralls image]: https://coveralls.io/repos/github/cenkalti/backoff/badge.svg?branch=master [google-http-java-client]: https://github.com/google/google-http-java-client/blob/da1aa993e90285ec18579f1553339b00e19b3ab5/google-http-client/src/main/java/com/google/api/client/util/ExponentialBackOff.java [exponential backoff wiki]: http://en.wikipedia.org/wiki/Exponential_backoff -[advanced example]: https://pkg.go.dev/github.com/cenkalti/backoff/v4?tab=doc#pkg-examples +[retry-src]: https://github.com/cenkalti/backoff/blob/v5/retry.go +[example]: https://github.com/cenkalti/backoff/blob/v5/example_test.go diff --git a/vendor/github.com/cenkalti/backoff/v4/backoff.go b/vendor/github.com/cenkalti/backoff/v5/backoff.go index 3676ee405..dd2b24ca7 100644 --- a/vendor/github.com/cenkalti/backoff/v4/backoff.go +++ b/vendor/github.com/cenkalti/backoff/v5/backoff.go @@ -15,16 +15,16 @@ import "time" // BackOff is a backoff policy for retrying an operation. type BackOff interface { // NextBackOff returns the duration to wait before retrying the operation, - // or backoff. Stop to indicate that no more retries should be made. + // backoff.Stop to indicate that no more retries should be made. // // Example usage: // - // duration := backoff.NextBackOff(); - // if (duration == backoff.Stop) { - // // Do not retry operation. - // } else { - // // Sleep for duration and retry operation. - // } + // duration := backoff.NextBackOff() + // if duration == backoff.Stop { + // // Do not retry operation. + // } else { + // // Sleep for duration and retry operation. + // } // NextBackOff() time.Duration diff --git a/vendor/github.com/cenkalti/backoff/v5/error.go b/vendor/github.com/cenkalti/backoff/v5/error.go new file mode 100644 index 000000000..beb2b38a2 --- /dev/null +++ b/vendor/github.com/cenkalti/backoff/v5/error.go @@ -0,0 +1,46 @@ +package backoff + +import ( + "fmt" + "time" +) + +// PermanentError signals that the operation should not be retried. +type PermanentError struct { + Err error +} + +// Permanent wraps the given err in a *PermanentError. +func Permanent(err error) error { + if err == nil { + return nil + } + return &PermanentError{ + Err: err, + } +} + +// Error returns a string representation of the Permanent error. +func (e *PermanentError) Error() string { + return e.Err.Error() +} + +// Unwrap returns the wrapped error. +func (e *PermanentError) Unwrap() error { + return e.Err +} + +// RetryAfterError signals that the operation should be retried after the given duration. +type RetryAfterError struct { + Duration time.Duration +} + +// RetryAfter returns a RetryAfter error that specifies how long to wait before retrying. +func RetryAfter(seconds int) error { + return &RetryAfterError{Duration: time.Duration(seconds) * time.Second} +} + +// Error returns a string representation of the RetryAfter error. +func (e *RetryAfterError) Error() string { + return fmt.Sprintf("retry after %s", e.Duration) +} diff --git a/vendor/github.com/cenkalti/backoff/v5/exponential.go b/vendor/github.com/cenkalti/backoff/v5/exponential.go new file mode 100644 index 000000000..c1f3e442d --- /dev/null +++ b/vendor/github.com/cenkalti/backoff/v5/exponential.go @@ -0,0 +1,125 @@ +package backoff + +import ( + "math/rand" + "time" +) + +/* +ExponentialBackOff is a backoff implementation that increases the backoff +period for each retry attempt using a randomization function that grows exponentially. + +NextBackOff() is calculated using the following formula: + + randomized interval = + RetryInterval * (random value in range [1 - RandomizationFactor, 1 + RandomizationFactor]) + +In other words NextBackOff() will range between the randomization factor +percentage below and above the retry interval. + +For example, given the following parameters: + + RetryInterval = 2 + RandomizationFactor = 0.5 + Multiplier = 2 + +the actual backoff period used in the next retry attempt will range between 1 and 3 seconds, +multiplied by the exponential, that is, between 2 and 6 seconds. + +Note: MaxInterval caps the RetryInterval and not the randomized interval. + +If the time elapsed since an ExponentialBackOff instance is created goes past the +MaxElapsedTime, then the method NextBackOff() starts returning backoff.Stop. + +The elapsed time can be reset by calling Reset(). + +Example: Given the following default arguments, for 10 tries the sequence will be, +and assuming we go over the MaxElapsedTime on the 10th try: + + Request # RetryInterval (seconds) Randomized Interval (seconds) + + 1 0.5 [0.25, 0.75] + 2 0.75 [0.375, 1.125] + 3 1.125 [0.562, 1.687] + 4 1.687 [0.8435, 2.53] + 5 2.53 [1.265, 3.795] + 6 3.795 [1.897, 5.692] + 7 5.692 [2.846, 8.538] + 8 8.538 [4.269, 12.807] + 9 12.807 [6.403, 19.210] + 10 19.210 backoff.Stop + +Note: Implementation is not thread-safe. +*/ +type ExponentialBackOff struct { + InitialInterval time.Duration + RandomizationFactor float64 + Multiplier float64 + MaxInterval time.Duration + + currentInterval time.Duration +} + +// Default values for ExponentialBackOff. +const ( + DefaultInitialInterval = 500 * time.Millisecond + DefaultRandomizationFactor = 0.5 + DefaultMultiplier = 1.5 + DefaultMaxInterval = 60 * time.Second +) + +// NewExponentialBackOff creates an instance of ExponentialBackOff using default values. +func NewExponentialBackOff() *ExponentialBackOff { + return &ExponentialBackOff{ + InitialInterval: DefaultInitialInterval, + RandomizationFactor: DefaultRandomizationFactor, + Multiplier: DefaultMultiplier, + MaxInterval: DefaultMaxInterval, + } +} + +// Reset the interval back to the initial retry interval and restarts the timer. +// Reset must be called before using b. +func (b *ExponentialBackOff) Reset() { + b.currentInterval = b.InitialInterval +} + +// NextBackOff calculates the next backoff interval using the formula: +// +// Randomized interval = RetryInterval * (1 ± RandomizationFactor) +func (b *ExponentialBackOff) NextBackOff() time.Duration { + if b.currentInterval == 0 { + b.currentInterval = b.InitialInterval + } + + next := getRandomValueFromInterval(b.RandomizationFactor, rand.Float64(), b.currentInterval) + b.incrementCurrentInterval() + return next +} + +// Increments the current interval by multiplying it with the multiplier. +func (b *ExponentialBackOff) incrementCurrentInterval() { + // Check for overflow, if overflow is detected set the current interval to the max interval. + if float64(b.currentInterval) >= float64(b.MaxInterval)/b.Multiplier { + b.currentInterval = b.MaxInterval + } else { + b.currentInterval = time.Duration(float64(b.currentInterval) * b.Multiplier) + } +} + +// Returns a random value from the following interval: +// +// [currentInterval - randomizationFactor * currentInterval, currentInterval + randomizationFactor * currentInterval]. +func getRandomValueFromInterval(randomizationFactor, random float64, currentInterval time.Duration) time.Duration { + if randomizationFactor == 0 { + return currentInterval // make sure no randomness is used when randomizationFactor is 0. + } + var delta = randomizationFactor * float64(currentInterval) + var minInterval = float64(currentInterval) - delta + var maxInterval = float64(currentInterval) + delta + + // Get a random value from the range [minInterval, maxInterval]. + // The formula used below has a +1 because if the minInterval is 1 and the maxInterval is 3 then + // we want a 33% chance for selecting either 1, 2 or 3. + return time.Duration(minInterval + (random * (maxInterval - minInterval + 1))) +} diff --git a/vendor/github.com/cenkalti/backoff/v5/retry.go b/vendor/github.com/cenkalti/backoff/v5/retry.go new file mode 100644 index 000000000..e43f47fb8 --- /dev/null +++ b/vendor/github.com/cenkalti/backoff/v5/retry.go @@ -0,0 +1,139 @@ +package backoff + +import ( + "context" + "errors" + "time" +) + +// DefaultMaxElapsedTime sets a default limit for the total retry duration. +const DefaultMaxElapsedTime = 15 * time.Minute + +// Operation is a function that attempts an operation and may be retried. +type Operation[T any] func() (T, error) + +// Notify is a function called on operation error with the error and backoff duration. +type Notify func(error, time.Duration) + +// retryOptions holds configuration settings for the retry mechanism. +type retryOptions struct { + BackOff BackOff // Strategy for calculating backoff periods. + Timer timer // Timer to manage retry delays. + Notify Notify // Optional function to notify on each retry error. + MaxTries uint // Maximum number of retry attempts. + MaxElapsedTime time.Duration // Maximum total time for all retries. +} + +type RetryOption func(*retryOptions) + +// WithBackOff configures a custom backoff strategy. +func WithBackOff(b BackOff) RetryOption { + return func(args *retryOptions) { + args.BackOff = b + } +} + +// withTimer sets a custom timer for managing delays between retries. +func withTimer(t timer) RetryOption { + return func(args *retryOptions) { + args.Timer = t + } +} + +// WithNotify sets a notification function to handle retry errors. +func WithNotify(n Notify) RetryOption { + return func(args *retryOptions) { + args.Notify = n + } +} + +// WithMaxTries limits the number of retry attempts. +func WithMaxTries(n uint) RetryOption { + return func(args *retryOptions) { + args.MaxTries = n + } +} + +// WithMaxElapsedTime limits the total duration for retry attempts. +func WithMaxElapsedTime(d time.Duration) RetryOption { + return func(args *retryOptions) { + args.MaxElapsedTime = d + } +} + +// Retry attempts the operation until success, a permanent error, or backoff completion. +// It ensures the operation is executed at least once. +// +// Returns the operation result or error if retries are exhausted or context is cancelled. +func Retry[T any](ctx context.Context, operation Operation[T], opts ...RetryOption) (T, error) { + // Initialize default retry options. + args := &retryOptions{ + BackOff: NewExponentialBackOff(), + Timer: &defaultTimer{}, + MaxElapsedTime: DefaultMaxElapsedTime, + } + + // Apply user-provided options to the default settings. + for _, opt := range opts { + opt(args) + } + + defer args.Timer.Stop() + + startedAt := time.Now() + args.BackOff.Reset() + for numTries := uint(1); ; numTries++ { + // Execute the operation. + res, err := operation() + if err == nil { + return res, nil + } + + // Stop retrying if maximum tries exceeded. + if args.MaxTries > 0 && numTries >= args.MaxTries { + return res, err + } + + // Handle permanent errors without retrying. + var permanent *PermanentError + if errors.As(err, &permanent) { + return res, err + } + + // Stop retrying if context is cancelled. + if cerr := context.Cause(ctx); cerr != nil { + return res, cerr + } + + // Calculate next backoff duration. + next := args.BackOff.NextBackOff() + if next == Stop { + return res, err + } + + // Reset backoff if RetryAfterError is encountered. + var retryAfter *RetryAfterError + if errors.As(err, &retryAfter) { + next = retryAfter.Duration + args.BackOff.Reset() + } + + // Stop retrying if maximum elapsed time exceeded. + if args.MaxElapsedTime > 0 && time.Since(startedAt)+next > args.MaxElapsedTime { + return res, err + } + + // Notify on error if a notifier function is provided. + if args.Notify != nil { + args.Notify(err, next) + } + + // Wait for the next backoff period or context cancellation. + args.Timer.Start(next) + select { + case <-args.Timer.C(): + case <-ctx.Done(): + return res, context.Cause(ctx) + } + } +} diff --git a/vendor/github.com/cenkalti/backoff/v4/ticker.go b/vendor/github.com/cenkalti/backoff/v5/ticker.go index df9d68bce..f0d4b2ae7 100644 --- a/vendor/github.com/cenkalti/backoff/v4/ticker.go +++ b/vendor/github.com/cenkalti/backoff/v5/ticker.go @@ -1,7 +1,6 @@ package backoff import ( - "context" "sync" "time" ) @@ -14,8 +13,7 @@ type Ticker struct { C <-chan time.Time c chan time.Time b BackOff - ctx context.Context - timer Timer + timer timer stop chan struct{} stopOnce sync.Once } @@ -27,22 +25,12 @@ type Ticker struct { // provided backoff policy (notably calling NextBackOff or Reset) // while the ticker is running. func NewTicker(b BackOff) *Ticker { - return NewTickerWithTimer(b, &defaultTimer{}) -} - -// NewTickerWithTimer returns a new Ticker with a custom timer. -// A default timer that uses system timer is used when nil is passed. -func NewTickerWithTimer(b BackOff, timer Timer) *Ticker { - if timer == nil { - timer = &defaultTimer{} - } c := make(chan time.Time) t := &Ticker{ C: c, c: c, b: b, - ctx: getContext(b), - timer: timer, + timer: &defaultTimer{}, stop: make(chan struct{}), } t.b.Reset() @@ -73,8 +61,6 @@ func (t *Ticker) run() { case <-t.stop: t.c = nil // Prevent future ticks from being sent to the channel. return - case <-t.ctx.Done(): - return } } } diff --git a/vendor/github.com/cenkalti/backoff/v4/timer.go b/vendor/github.com/cenkalti/backoff/v5/timer.go index 8120d0213..a89530974 100644 --- a/vendor/github.com/cenkalti/backoff/v4/timer.go +++ b/vendor/github.com/cenkalti/backoff/v5/timer.go @@ -2,7 +2,7 @@ package backoff import "time" -type Timer interface { +type timer interface { Start(duration time.Duration) Stop() C() <-chan time.Time |