frostfs-s3-gw/api/cache/system.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"
"github.com/bluele/gcache"
"go.uber.org/zap"
)
// SystemCache provides lru cache for objects.
// This cache contains "system" objects (bucket versioning settings, tagging object etc.).
// Key is bucketName+systemFilePath.
type SystemCache struct {
cache gcache.Cache
logger *zap.Logger
}
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 returns new default cache expiration values.
func DefaultSystemConfig(logger *zap.Logger) *Config {
return &Config{
Size: DefaultSystemCacheSize,
Lifetime: DefaultSystemCacheLifetime,
Logger: logger,
}
}
// 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, logger: config.Logger}
}
// GetObject returns a cached object.
func (o *SystemCache) GetObject(key string) *data.ObjectInfo {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*data.ObjectInfo)
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
}
// GetLockInfo returns a cached object.
func (o *SystemCache) GetLockInfo(key string) *data.LockInfo {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*data.LockInfo)
if !ok {
return nil
}
return result
}
func (o *SystemCache) GetCORS(key string) *data.CORSConfiguration {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*data.CORSConfiguration)
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
}
func (o *SystemCache) GetSettings(key string) *data.BucketSettings {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(*data.BucketSettings)
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
}
// GetTagging returns tags of a bucket or an object.
func (o *SystemCache) GetTagging(key string) map[string]string {
entry, err := o.cache.Get(key)
if err != nil {
return nil
}
result, ok := entry.(map[string]string)
if !ok {
return nil
}
return result
}
// PutObject puts an object to cache.
func (o *SystemCache) PutObject(key string, obj *data.ObjectInfo) error {
return o.cache.Set(key, obj)
}
// PutLockInfo puts an object to cache.
func (o *SystemCache) PutLockInfo(key string, lockInfo *data.LockInfo) error {
return o.cache.Set(key, lockInfo)
}
func (o *SystemCache) PutCORS(key string, obj *data.CORSConfiguration) error {
return o.cache.Set(key, obj)
}
func (o *SystemCache) PutSettings(key string, settings *data.BucketSettings) error {
return o.cache.Set(key, settings)
}
// PutTagging puts tags of a bucket or an object.
func (o *SystemCache) PutTagging(key string, tagSet map[string]string) error {
return o.cache.Set(key, tagSet)
}
// Delete deletes an object from cache.
func (o *SystemCache) Delete(key string) bool {
return o.cache.Remove(key)
}