52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
/*
|
|
Copyright 2019 The Kubernetes Authors All rights reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package retry
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/cenkalti/backoff"
|
|
)
|
|
|
|
const defaultMaxRetries = 113
|
|
|
|
// Expo is exponential backoff retry.
|
|
// initInterval is the initial waiting time to start with.
|
|
// maxTime is the max time allowed to spend on the all the retries.
|
|
// maxRetries is the optional max number of retries allowed with default of 13.
|
|
func Expo(callback func() error, initInterval time.Duration, maxTime time.Duration, maxRetries ...uint64) error {
|
|
maxRetry := uint64(defaultMaxRetries) // max number of times to retry
|
|
if maxRetries != nil {
|
|
maxRetry = maxRetries[0]
|
|
}
|
|
|
|
b := backoff.NewExponentialBackOff()
|
|
b.MaxElapsedTime = maxTime
|
|
b.InitialInterval = initInterval
|
|
b.RandomizationFactor = 0.5
|
|
b.Multiplier = 1.5
|
|
bm := backoff.WithMaxRetries(b, maxRetry)
|
|
return backoff.Retry(callback, bm)
|
|
}
|
|
|
|
// RetriableError is an error that can be tried again
|
|
type RetriableError struct {
|
|
Err error
|
|
}
|
|
|
|
func (r RetriableError) Error() string { return "Temporary Error: " + r.Err.Error() }
|