ceph-csi/vendor/github.com/aws/aws-sdk-go-v2/aws/retryer.go
dependabot[bot] 66785c3bba rebase: bump github.com/aws/aws-sdk-go-v2/service/sts
Bumps [github.com/aws/aws-sdk-go-v2/service/sts](https://github.com/aws/aws-sdk-go-v2) from 1.19.0 to 1.19.2.
- [Release notes](https://github.com/aws/aws-sdk-go-v2/releases)
- [Changelog](https://github.com/aws/aws-sdk-go-v2/blob/main/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go-v2/compare/service/s3/v1.19.0...service/ecs/v1.19.2)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go-v2/service/sts
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
2023-06-22 06:59:34 +00:00

128 lines
4.7 KiB
Go

package aws
import (
"context"
"fmt"
"time"
)
// RetryMode provides the mode the API client will use to create a retryer
// based on.
type RetryMode string
const (
// RetryModeStandard model provides rate limited retry attempts with
// exponential backoff delay.
RetryModeStandard RetryMode = "standard"
// RetryModeAdaptive model provides attempt send rate limiting on throttle
// responses in addition to standard mode's retry rate limiting.
//
// Adaptive retry mode is experimental and is subject to change in the
// future.
RetryModeAdaptive RetryMode = "adaptive"
)
// ParseRetryMode attempts to parse a RetryMode from the given string.
// Returning error if the value is not a known RetryMode.
func ParseRetryMode(v string) (mode RetryMode, err error) {
switch v {
case "standard":
return RetryModeStandard, nil
case "adaptive":
return RetryModeAdaptive, nil
default:
return mode, fmt.Errorf("unknown RetryMode, %v", v)
}
}
func (m RetryMode) String() string { return string(m) }
// Retryer is an interface to determine if a given error from a
// attempt should be retried, and if so what backoff delay to apply. The
// default implementation used by most services is the retry package's Standard
// type. Which contains basic retry logic using exponential backoff.
type Retryer interface {
// IsErrorRetryable returns if the failed attempt is retryable. This check
// should determine if the error can be retried, or if the error is
// terminal.
IsErrorRetryable(error) bool
// MaxAttempts returns the maximum number of attempts that can be made for
// an attempt before failing. A value of 0 implies that the attempt should
// be retried until it succeeds if the errors are retryable.
MaxAttempts() int
// RetryDelay returns the delay that should be used before retrying the
// attempt. Will return error if the delay could not be determined.
RetryDelay(attempt int, opErr error) (time.Duration, error)
// GetRetryToken attempts to deduct the retry cost from the retry token pool.
// Returning the token release function, or error.
GetRetryToken(ctx context.Context, opErr error) (releaseToken func(error) error, err error)
// GetInitialToken returns the initial attempt token that can increment the
// retry token pool if the attempt is successful.
GetInitialToken() (releaseToken func(error) error)
}
// RetryerV2 is an interface to determine if a given error from an attempt
// should be retried, and if so what backoff delay to apply. The default
// implementation used by most services is the retry package's Standard type.
// Which contains basic retry logic using exponential backoff.
//
// RetryerV2 replaces the Retryer interface, deprecating the GetInitialToken
// method in favor of GetAttemptToken which takes a context, and can return an error.
//
// The SDK's retry package's Attempt middleware, and utilities will always
// wrap a Retryer as a RetryerV2. Delegating to GetInitialToken, only if
// GetAttemptToken is not implemented.
type RetryerV2 interface {
Retryer
// GetInitialToken returns the initial attempt token that can increment the
// retry token pool if the attempt is successful.
//
// Deprecated: This method does not provide a way to block using Context,
// nor can it return an error. Use RetryerV2, and GetAttemptToken instead.
GetInitialToken() (releaseToken func(error) error)
// GetAttemptToken returns the send token that can be used to rate limit
// attempt calls. Will be used by the SDK's retry package's Attempt
// middleware to get a send token prior to calling the temp and releasing
// the send token after the attempt has been made.
GetAttemptToken(context.Context) (func(error) error, error)
}
// NopRetryer provides a RequestRetryDecider implementation that will flag
// all attempt errors as not retryable, with a max attempts of 1.
type NopRetryer struct{}
// IsErrorRetryable returns false for all error values.
func (NopRetryer) IsErrorRetryable(error) bool { return false }
// MaxAttempts always returns 1 for the original attempt.
func (NopRetryer) MaxAttempts() int { return 1 }
// RetryDelay is not valid for the NopRetryer. Will always return error.
func (NopRetryer) RetryDelay(int, error) (time.Duration, error) {
return 0, fmt.Errorf("not retrying any attempt errors")
}
// GetRetryToken returns a stub function that does nothing.
func (NopRetryer) GetRetryToken(context.Context, error) (func(error) error, error) {
return nopReleaseToken, nil
}
// GetInitialToken returns a stub function that does nothing.
func (NopRetryer) GetInitialToken() func(error) error {
return nopReleaseToken
}
// GetAttemptToken returns a stub function that does nothing.
func (NopRetryer) GetAttemptToken(context.Context) (func(error) error, error) {
return nopReleaseToken, nil
}
func nopReleaseToken(error) error { return nil }