frostfs-s3-gw/api/cache/buckets.go

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package cache
import (
"time"
"github.com/bluele/gcache"
"github.com/nspcc-dev/neofs-s3-gw/api"
)
type (
// BucketCache provides interface for lru cache for objects.
BucketCache interface {
Get(key string) *api.BucketInfo
Put(bkt *api.BucketInfo) error
Delete(key string) bool
}
// GetBucketCache contains cache with objects and lifetime of cache entries.
GetBucketCache struct {
cache gcache.Cache
lifetime time.Duration
}
)
// NewBucketCache creates an object of BucketCache.
func NewBucketCache(cacheSize int, lifetime time.Duration) *GetBucketCache {
gc := gcache.New(cacheSize).LRU().Build()
return &GetBucketCache{cache: gc, lifetime: lifetime}
}
// Get returns cached object.
func (o *GetBucketCache) Get(key string) *api.BucketInfo {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*api.BucketInfo)
if !ok {
return nil
}
return result
}
// Put puts an object to cache.
func (o *GetBucketCache) Put(bkt *api.BucketInfo) error {
return o.cache.SetWithExpire(bkt.Name, bkt, o.lifetime)
}
// Delete deletes an object from cache.
func (o *GetBucketCache) Delete(key string) bool {
return o.cache.Remove(key)
}