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

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package cache
import (
"fmt"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
"github.com/bluele/gcache"
"go.uber.org/zap"
)
// AccessControlCache provides lru cache for objects.
type AccessControlCache struct {
cache gcache.Cache
logger *zap.Logger
}
const (
// DefaultAccessControlCacheLifetime is a default lifetime of entries in access' cache.
DefaultAccessControlCacheLifetime = 1 * time.Minute
// DefaultAccessControlCacheSize is a default maximum number of entries in access' cache.
DefaultAccessControlCacheSize = 1e5
)
// DefaultAccessControlConfig returns new default cache expiration values.
func DefaultAccessControlConfig(logger *zap.Logger) *Config {
return &Config{
Size: DefaultAccessControlCacheSize,
Lifetime: DefaultAccessControlCacheLifetime,
Logger: logger,
}
}
// NewAccessControlCache creates an object of AccessControlCache.
func NewAccessControlCache(config *Config) *AccessControlCache {
gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
return &AccessControlCache{cache: gc, logger: config.Logger}
}
// Get returns true if such key exists.
func (o *AccessControlCache) Get(owner user.ID, key string) bool {
entry, err := o.cache.Get(cacheKey(owner, key))
if err != nil {
return false
}
result, ok := entry.(bool)
if !ok {
o.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
zap.String("expected", fmt.Sprintf("%T", result)))
return false
}
return result
}
// Put puts an item to cache.
func (o *AccessControlCache) Put(owner user.ID, key string) error {
return o.cache.Set(cacheKey(owner, key), true)
}
// Delete deletes an object from cache.
func (o *AccessControlCache) Delete(owner user.ID, key string) bool {
return o.cache.Remove(cacheKey(owner, key))
}
func cacheKey(owner user.ID, key string) string {
return owner.EncodeToString() + key
}