forked from TrueCloudLab/frostfs-s3-gw
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package cache
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import (
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"time"
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"github.com/bluele/gcache"
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cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
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"github.com/nspcc-dev/neofs-api-go/pkg/owner"
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)
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type (
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// BucketCache provides interface for lru cache for objects.
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BucketCache interface {
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Get(key string) *BucketInfo
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Put(bkt *BucketInfo) error
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Delete(key string) bool
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}
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// BucketInfo stores basic bucket data.
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BucketInfo struct {
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Name string
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CID *cid.ID
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Owner *owner.ID
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Created time.Time
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BasicACL uint32
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}
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// GetBucketCache contains cache with objects and lifetime of cache entries.
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GetBucketCache struct {
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cache gcache.Cache
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lifetime time.Duration
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}
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)
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// NewBucketCache creates an object of BucketCache.
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func NewBucketCache(cacheSize int, lifetime time.Duration) *GetBucketCache {
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gc := gcache.New(cacheSize).LRU().Build()
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return &GetBucketCache{cache: gc, lifetime: lifetime}
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}
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// Get returns cached object.
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func (o *GetBucketCache) Get(key string) *BucketInfo {
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entry, err := o.cache.Get(key)
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if err != nil {
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return nil
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}
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result, ok := entry.(*BucketInfo)
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if !ok {
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return nil
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}
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return result
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}
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// Put puts an object to cache.
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func (o *GetBucketCache) Put(bkt *BucketInfo) error {
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return o.cache.SetWithExpire(bkt.Name, bkt, o.lifetime)
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}
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// Delete deletes an object from cache.
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func (o *GetBucketCache) Delete(key string) bool {
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return o.cache.Remove(key)
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}
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const bktVersionSettingsObject = ".s3-versioning-settings"
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// SettingsObjectName is system name for bucket settings file.
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func (b *BucketInfo) SettingsObjectName() string {
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return bktVersionSettingsObject
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}
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// SystemObjectKey is key to use in SystemCache.
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func (b *BucketInfo) SystemObjectKey(obj string) string {
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return b.Name + obj
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}
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