forked from TrueCloudLab/frostfs-s3-gw
79 lines
1.9 KiB
Go
79 lines
1.9 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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"github.com/nspcc-dev/neofs-sdk-go/object"
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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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// ObjectsCache provides lru cache for objects.
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type ObjectsCache 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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// DefaultObjectsCacheLifetime is a default lifetime of entries in objects' cache.
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DefaultObjectsCacheLifetime = time.Minute * 5
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// DefaultObjectsCacheSize is a default maximum number of entries in objects' cache.
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DefaultObjectsCacheSize = 1e6
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)
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// DefaultObjectsConfig returns new default cache expiration values.
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func DefaultObjectsConfig(logger *zap.Logger) *Config {
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return &Config{
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Size: DefaultObjectsCacheSize,
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Lifetime: DefaultObjectsCacheLifetime,
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Logger: logger,
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}
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}
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// New creates an object of ObjectHeadersCache.
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func New(config *Config) *ObjectsCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &ObjectsCache{cache: gc, logger: config.Logger}
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}
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// Get returns a cached object.
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func (o *ObjectsCache) Get(address oid.Address) *object.Object {
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entry, err := o.cache.Get(address.EncodeToString())
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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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o.logger.Warn("invalid cache entry type", zap.String("actual", fmt.Sprintf("%T", entry)),
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zap.String("expected", "object.Object"))
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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 *ObjectsCache) Put(obj object.Object) error {
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cnrID, ok := obj.ContainerID()
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if !ok {
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return fmt.Errorf("empty container id")
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}
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objID, ok := obj.ID()
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if !ok {
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return fmt.Errorf("empty object id")
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}
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var addr oid.Address
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addr.SetContainer(cnrID)
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addr.SetObject(objID)
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return o.cache.Set(addr.EncodeToString(), obj)
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}
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// Delete deletes an object from cache.
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func (o *ObjectsCache) Delete(address oid.Address) bool {
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return o.cache.Remove(address.EncodeToString())
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}
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