kubernetes retry_with_deadline 源码
kubernetes retry_with_deadline 代码
文件路径：/staging/src/k8s.io/client-go/tools/cache/retry_with_deadline.go
/*
Copyright 2022 The Kubernetes Authors.
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 cache
import (
"k8s.io/utils/clock"
"time"
)
type RetryWithDeadline interface {
After(error)
ShouldRetry() bool
}
type retryWithDeadlineImpl struct {
firstErrorTime time.Time
lastErrorTime time.Time
maxRetryDuration time.Duration
minResetPeriod time.Duration
isRetryable func(error) bool
clock clock.Clock
}
func NewRetryWithDeadline(maxRetryDuration, minResetPeriod time.Duration, isRetryable func(error) bool, clock clock.Clock) RetryWithDeadline {
return &retryWithDeadlineImpl{
firstErrorTime: time.Time{},
lastErrorTime: time.Time{},
maxRetryDuration: maxRetryDuration,
minResetPeriod: minResetPeriod,
isRetryable: isRetryable,
clock: clock,
}
}
func (r *retryWithDeadlineImpl) reset() {
r.firstErrorTime = time.Time{}
r.lastErrorTime = time.Time{}
}
func (r *retryWithDeadlineImpl) After(err error) {
if r.isRetryable(err) {
if r.clock.Now().Sub(r.lastErrorTime) >= r.minResetPeriod {
r.reset()
}
if r.firstErrorTime.IsZero() {
r.firstErrorTime = r.clock.Now()
}
r.lastErrorTime = r.clock.Now()
}
}
func (r *retryWithDeadlineImpl) ShouldRetry() bool {
if r.maxRetryDuration <= time.Duration(0) {
return false
}
if r.clock.Now().Sub(r.firstErrorTime) <= r.maxRetryDuration {
return true
}
r.reset()
return false
}
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