| // Copyright Istio 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 ( |
| "sync" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/operator/pkg/metrics" |
| "github.com/apache/dubbo-go-pixiu/operator/pkg/object" |
| ) |
| |
| // ObjectCache is a cache of objects, |
| type ObjectCache struct { |
| // Cache is a cache keyed by object Hash() function. |
| Cache map[string]*object.K8sObject |
| Mu *sync.RWMutex |
| } |
| |
| var ( |
| // objectCaches holds the latest copy of each object applied by the controller. The caches are divided by component |
| // name. |
| objectCaches = make(map[string]*ObjectCache) |
| objectCachesMu sync.RWMutex |
| ) |
| |
| // FlushObjectCaches flushes all object caches. |
| func FlushObjectCaches() { |
| objectCachesMu.Lock() |
| defer objectCachesMu.Unlock() |
| objectCaches = make(map[string]*ObjectCache) |
| metrics.CacheFlushTotal.Increment() |
| } |
| |
| // GetCache returns the object Cache for the given name, creating one in the global Cache if needed. |
| func GetCache(name string) *ObjectCache { |
| objectCachesMu.Lock() |
| defer objectCachesMu.Unlock() |
| |
| // Create and/or get the Cache corresponding to the CR name we're processing. Per name partitioning is required to |
| // prune the Cache to remove any objects not in the manifest generated for a given CR. |
| if objectCaches[name] == nil { |
| objectCaches[name] = &ObjectCache{ |
| Cache: make(map[string]*object.K8sObject), |
| Mu: &sync.RWMutex{}, |
| } |
| } |
| return objectCaches[name] |
| } |
| |
| // RemoveObject removes object with objHash in the Cache with the given name from the object Cache. |
| func RemoveObject(name, objHash string) { |
| objectCachesMu.Lock() |
| objectCache := objectCaches[name] |
| objectCachesMu.Unlock() |
| |
| if objectCache != nil { |
| objectCache.Mu.Lock() |
| delete(objectCache.Cache, objHash) |
| objectCache.Mu.Unlock() |
| } |
| } |