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plugin/pkg/admission/eventratelimit/cache.go
56 строк
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Davanum Srinivas
switch from golang-lru to the one in k8s.io/utils
08 июл 2021, 05:31
Не верифицирован
08 июл 2021, 05:31
79d0c6c
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/* Copyright 2017 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 eventratelimit import ( "k8s.io/client-go/util/flowcontrol" "k8s.io/utils/lru" ) // cache is an interface for caching the limits of a particular type type cache interface { // get the rate limiter associated with the specified key get(key interface{}) flowcontrol.RateLimiter } // singleCache is a cache that only stores a single, constant item type singleCache struct { // the single rate limiter held by the cache rateLimiter flowcontrol.RateLimiter } func (c *singleCache) get(key interface{}) flowcontrol.RateLimiter { return c.rateLimiter } // lruCache is a least-recently-used cache type lruCache struct { // factory to use to create new rate limiters rateLimiterFactory func() flowcontrol.RateLimiter // the actual LRU cache cache *lru.Cache } func (c *lruCache) get(key interface{}) flowcontrol.RateLimiter { value, found := c.cache.Get(key) if !found { rateLimter := c.rateLimiterFactory() c.cache.Add(key, rateLimter) return rateLimter } return value.(flowcontrol.RateLimiter) }