58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package cache
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/bluele/gcache"
|
|
"github.com/nspcc-dev/neofs-api-go/pkg/object"
|
|
)
|
|
|
|
// SystemCache provides lru cache for objects.
|
|
// This cache contains "system" objects (bucket versioning settings, tagging object etc.).
|
|
// Key is bucketName+systemFileName.
|
|
type SystemCache struct {
|
|
cache gcache.Cache
|
|
}
|
|
|
|
const (
|
|
// DefaultSystemCacheSize is a default maximum number of entries in cache.
|
|
DefaultSystemCacheSize = 1e4
|
|
// DefaultSystemCacheLifetime is a default lifetime of entries in cache.
|
|
DefaultSystemCacheLifetime = 5 * time.Minute
|
|
)
|
|
|
|
// DefaultSystemConfig return new default cache expiration values.
|
|
func DefaultSystemConfig() *Config {
|
|
return &Config{Size: DefaultSystemCacheSize, Lifetime: DefaultSystemCacheLifetime}
|
|
}
|
|
|
|
// NewSystemCache creates an object of SystemCache.
|
|
func NewSystemCache(config *Config) *SystemCache {
|
|
gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
|
|
return &SystemCache{cache: gc}
|
|
}
|
|
|
|
// Get returns cached object.
|
|
func (o *SystemCache) 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 *SystemCache) Put(key string, obj *object.Object) error {
|
|
return o.cache.Set(key, obj)
|
|
}
|
|
|
|
// Delete deletes an object from cache.
|
|
func (o *SystemCache) Delete(key string) bool {
|
|
return o.cache.Remove(key)
|
|
}
|