forked from TrueCloudLab/frostfs-s3-gw
58 lines
1.4 KiB
Go
58 lines
1.4 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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// SystemCache provides 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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type SystemCache struct {
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cache gcache.Cache
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}
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const (
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// DefaultSystemCacheSize is a default maximum number of entries in cache.
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DefaultSystemCacheSize = 1e4
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// DefaultSystemCacheLifetime is a default lifetime of entries in cache.
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DefaultSystemCacheLifetime = 5 * time.Minute
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)
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// DefaultSystemConfig return new default cache expiration values.
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func DefaultSystemConfig() *Config {
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return &Config{Size: DefaultSystemCacheSize, Lifetime: DefaultSystemCacheLifetime}
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}
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// NewSystemCache creates an object of SystemCache.
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func NewSystemCache(config *Config) *SystemCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &SystemCache{cache: gc}
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}
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// Get returns cached object.
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func (o *SystemCache) 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 *SystemCache) Put(key string, obj *object.Object) error {
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return o.cache.Set(key, obj)
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}
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// Delete deletes an object from cache.
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func (o *SystemCache) Delete(key string) bool {
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return o.cache.Remove(key)
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}
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