frostfs-s3-gw/api/cache/system.go
Denis Kirillov 4bb885d526 [#122] Refactor
Signed-off-by: Denis Kirillov <denis@nspcc.ru>
2021-08-25 14:49:21 +03:00

57 lines
1.3 KiB
Go

package cache
import (
"time"
"github.com/bluele/gcache"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
)
type (
// SystemCache provides interface for lru cache for objects.
// This cache contains "system" objects (bucket versioning settings, tagging object etc.).
// Key is bucketName+systemFileName.
SystemCache interface {
Get(key string) *object.Object
Put(key string, obj *object.Object) error
Delete(key string) bool
}
// SysCache contains cache with objects and lifetime of cache entries.
SysCache struct {
cache gcache.Cache
lifetime time.Duration
}
)
// NewSystemCache creates an object of SystemCache.
func NewSystemCache(cacheSize int, lifetime time.Duration) *SysCache {
gc := gcache.New(cacheSize).LRU().Build()
return &SysCache{cache: gc, lifetime: lifetime}
}
// Get returns cached object.
func (o *SysCache) Get(key string) *object.Object {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*object.Object)
if !ok {
return nil
}
return result
}
// Put puts an object to cache.
func (o *SysCache) Put(key string, obj *object.Object) error {
return o.cache.SetWithExpire(key, obj, o.lifetime)
}
// Delete deletes an object from cache.
func (o *SysCache) Delete(key string) bool {
return o.cache.Remove(key)
}