57 lines
1.3 KiB
Go
57 lines
1.3 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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"github.com/nspcc-dev/neofs-api-go/pkg/object"
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)
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type (
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// SystemCache provides interface for lru cache for objects.
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// This cache contains "system" objects (bucket versioning settings, tagging object etc.).
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// Key is bucketName+systemFileName.
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SystemCache interface {
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Get(key string) *object.Object
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Put(key string, obj *object.Object) error
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Delete(key string) bool
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}
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// SysCache contains cache with objects and lifetime of cache entries.
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SysCache 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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// NewSystemCache creates an object of SystemCache.
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func NewSystemCache(cacheSize int, lifetime time.Duration) *SysCache {
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gc := gcache.New(cacheSize).LRU().Build()
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return &SysCache{cache: gc, lifetime: lifetime}
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}
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// Get returns cached object.
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func (o *SysCache) Get(key string) *object.Object {
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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.(*object.Object)
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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 *SysCache) Put(key string, obj *object.Object) error {
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return o.cache.SetWithExpire(key, obj, o.lifetime)
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}
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// Delete deletes an object from cache.
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func (o *SysCache) Delete(key string) bool {
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return o.cache.Remove(key)
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}
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