forked from TrueCloudLab/frostfs-s3-gw
62 lines
1.5 KiB
Go
62 lines
1.5 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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// ObjectsCache provides interface for lru cache for objects.
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type ObjectsCache interface {
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Get(address *object.Address) *object.Object
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Put(address *object.Address, obj object.Object) error
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Delete(address *object.Address) bool
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}
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const (
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// DefaultObjectsCacheLifetime is a default lifetime of objects in cache.
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DefaultObjectsCacheLifetime = time.Minute * 5
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// DefaultObjectsCacheSize is a default maximum number of objects in cache.
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DefaultObjectsCacheSize = 1e6
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)
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type (
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// ObjectHeadersCache contains cache with objects and lifetime of cache entries.
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ObjectHeadersCache 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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// New creates an object of ObjectHeadersCache.
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func New(cacheSize int, lifetime time.Duration) *ObjectHeadersCache {
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gc := gcache.New(cacheSize).LRU().Build()
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return &ObjectHeadersCache{cache: gc, lifetime: lifetime}
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}
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// Get returns cached object.
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func (o *ObjectHeadersCache) Get(address *object.Address) *object.Object {
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entry, err := o.cache.Get(address.String())
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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 *ObjectHeadersCache) Put(address *object.Address, obj object.Object) error {
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return o.cache.SetWithExpire(address.String(), obj, o.lifetime)
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}
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// Delete deletes an object from cache.
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func (o *ObjectHeadersCache) Delete(address *object.Address) bool {
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return o.cache.Remove(address.String())
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}
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