58 lines
1.5 KiB
Go
58 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-sdk-go/object/address"
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)
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// ObjectsNameCache provides lru cache for objects.
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// This cache contains mapping nice names to object addresses.
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// Key is bucketName+objectName.
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type ObjectsNameCache struct {
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cache gcache.Cache
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}
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const (
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// DefaultObjectsNameCacheSize is a default maximum number of entries in cache.
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DefaultObjectsNameCacheSize = 1e4
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// DefaultObjectsNameCacheLifetime is a default lifetime of entries in cache.
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DefaultObjectsNameCacheLifetime = time.Minute
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)
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// DefaultObjectsNameConfig returns new default cache expiration values.
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func DefaultObjectsNameConfig() *Config {
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return &Config{Size: DefaultObjectsNameCacheSize, Lifetime: DefaultObjectsNameCacheLifetime}
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}
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// NewObjectsNameCache creates an object of ObjectsNameCache.
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func NewObjectsNameCache(config *Config) *ObjectsNameCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &ObjectsNameCache{cache: gc}
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}
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// Get returns a cached object.
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func (o *ObjectsNameCache) Get(key string) *address.Address {
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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.(*address.Address)
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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 *ObjectsNameCache) Put(key string, address *address.Address) error {
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return o.cache.Set(key, address)
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}
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// Delete deletes an object from cache.
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func (o *ObjectsNameCache) Delete(key string) bool {
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return o.cache.Remove(key)
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}
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