forked from TrueCloudLab/frostfs-s3-gw
67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package cache
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import (
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"fmt"
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"time"
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"github.com/bluele/gcache"
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oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
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"go.uber.org/zap"
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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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logger *zap.Logger
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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(logger *zap.Logger) *Config {
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return &Config{
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Size: DefaultObjectsNameCacheSize,
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Lifetime: DefaultObjectsNameCacheLifetime,
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Logger: logger,
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}
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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, logger: config.Logger}
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}
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// Get returns a cached object. Returns nil if value is missing.
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func (o *ObjectsNameCache) Get(key string) *oid.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.(oid.Address)
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if !ok {
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o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)),
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zap.String("expected", fmt.Sprintf("%T", result)))
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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 oid.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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