frostfs-s3-gw/api/cache/names.go
Denis Kirillov 300d4359d8 [#465] Handle cache cast failure
Signed-off-by: Denis Kirillov <denis@nspcc.ru>
2022-06-07 17:20:26 +03:00

67 lines
1.8 KiB
Go

package cache
import (
"fmt"
"time"
"github.com/bluele/gcache"
oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
"go.uber.org/zap"
)
// ObjectsNameCache provides lru cache for objects.
// This cache contains mapping nice names to object addresses.
// Key is bucketName+objectName.
type ObjectsNameCache struct {
cache gcache.Cache
logger *zap.Logger
}
const (
// DefaultObjectsNameCacheSize is a default maximum number of entries in cache.
DefaultObjectsNameCacheSize = 1e4
// DefaultObjectsNameCacheLifetime is a default lifetime of entries in cache.
DefaultObjectsNameCacheLifetime = time.Minute
)
// DefaultObjectsNameConfig returns new default cache expiration values.
func DefaultObjectsNameConfig(logger *zap.Logger) *Config {
return &Config{
Size: DefaultObjectsNameCacheSize,
Lifetime: DefaultObjectsNameCacheLifetime,
Logger: logger,
}
}
// NewObjectsNameCache creates an object of ObjectsNameCache.
func NewObjectsNameCache(config *Config) *ObjectsNameCache {
gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
return &ObjectsNameCache{cache: gc, logger: config.Logger}
}
// Get returns a cached object. Returns nil if value is missing.
func (o *ObjectsNameCache) Get(key string) *oid.Address {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(oid.Address)
if !ok {
o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)),
zap.String("expected", "oid.Address"))
return nil
}
return &result
}
// Put puts an object to cache.
func (o *ObjectsNameCache) Put(key string, address oid.Address) error {
return o.cache.Set(key, address)
}
// Delete deletes an object from cache.
func (o *ObjectsNameCache) Delete(key string) bool {
return o.cache.Remove(key)
}