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

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package cache
import (
"fmt"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"github.com/bluele/gcache"
"go.uber.org/zap"
)
// ObjectsCache provides lru cache for objects.
type ObjectsCache struct {
cache gcache.Cache
logger *zap.Logger
}
const (
// DefaultObjectsCacheLifetime is a default lifetime of entries in objects' cache.
DefaultObjectsCacheLifetime = time.Minute * 5
// DefaultObjectsCacheSize is a default maximum number of entries in objects' cache.
DefaultObjectsCacheSize = 1e6
)
// DefaultObjectsConfig returns new default cache expiration values.
func DefaultObjectsConfig(logger *zap.Logger) *Config {
return &Config{
Size: DefaultObjectsCacheSize,
Lifetime: DefaultObjectsCacheLifetime,
Logger: logger,
}
}
// New creates an object of ObjectHeadersCache.
func New(config *Config) *ObjectsCache {
gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
return &ObjectsCache{cache: gc, logger: config.Logger}
}
// GetObject returns a cached object info.
func (o *ObjectsCache) GetObject(address oid.Address) *data.ExtendedObjectInfo {
entry, err := o.cache.Get(address)
if err != nil {
return nil
}
result, ok := entry.(*data.ExtendedObjectInfo)
if !ok {
o.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
zap.String("expected", fmt.Sprintf("%T", result)))
return nil
}
return result
}
// PutObject puts an object info to cache.
func (o *ObjectsCache) PutObject(obj *data.ExtendedObjectInfo) error {
return o.cache.Set(obj.ObjectInfo.Address(), obj)
}
// Delete deletes an object from cache.
func (o *ObjectsCache) Delete(address oid.Address) bool {
return o.cache.Remove(address)
}