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/*
Copyright 2016 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 workqueue
// RateLimitingInterface is an interface that rate limits items being added to the queue.
type RateLimitingInterface interface {
DelayingInterface
// AddRateLimited adds an item to the workqueue after the rate limiter says it's ok
AddRateLimited(item interface{})
// Forget indicates that an item is finished being retried. Doesn't matter whether it's for perm failing
// or for success, we'll stop the rate limiter from tracking it. This only clears the `rateLimiter`, you
// still have to call `Done` on the queue.
Forget(item interface{})
// NumRequeues returns back how many times the item was requeued
NumRequeues(item interface{}) int
}
// NewRateLimitingQueue constructs a new workqueue with rateLimited queuing ability
// Remember to call Forget! If you don't, you may end up tracking failures forever.
func NewRateLimitingQueue(rateLimiter RateLimiter) RateLimitingInterface {
return &rateLimitingType{
DelayingInterface: NewDelayingQueue(),
rateLimiter: rateLimiter,
}
}
func NewNamedRateLimitingQueue(rateLimiter RateLimiter, name string) RateLimitingInterface {
return &rateLimitingType{
DelayingInterface: NewNamedDelayingQueue(name),
rateLimiter: rateLimiter,
}
}
// rateLimitingType wraps an Interface and provides rateLimited re-enquing
type rateLimitingType struct {
DelayingInterface
rateLimiter RateLimiter
}
// AddRateLimited AddAfter's the item based on the time when the rate limiter says it's ok
func (q *rateLimitingType) AddRateLimited(item interface{}) {
q.DelayingInterface.AddAfter(item, q.rateLimiter.When(item))
}
func (q *rateLimitingType) NumRequeues(item interface{}) int {
return q.rateLimiter.NumRequeues(item)
}
func (q *rateLimitingType) Forget(item interface{}) {
q.rateLimiter.Forget(item)
}