frostfs-s3-gw/api/cache/objects.go

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package cache
import (
"time"
"github.com/bluele/gcache"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
)
// ObjectsCache provides lru cache for objects.
type ObjectsCache struct {
cache gcache.Cache
}
const (
// DefaultObjectsCacheLifetime is a default lifetime of entries in objects' cache.
DefaultObjectsCacheLifetime = time.Minute * 5
// DefaultObjectsCacheSize is a default maximum number of entries in objects' in cache.
DefaultObjectsCacheSize = 1e6
)
// DefaultObjectsConfig return new default cache expiration values.
func DefaultObjectsConfig() *Config {
return &Config{Size: DefaultObjectsCacheSize, Lifetime: DefaultObjectsCacheLifetime}
}
// New creates an object of ObjectHeadersCache.
func New(config *Config) *ObjectsCache {
gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
return &ObjectsCache{cache: gc}
}
// Get returns cached object.
func (o *ObjectsCache) Get(address *object.Address) *object.Object {
entry, err := o.cache.Get(address.String())
if err != nil {
return nil
}
result, ok := entry.(object.Object)
if !ok {
return nil
}
return &result
}
// Put puts an object to cache.
func (o *ObjectsCache) Put(obj object.Object) error {
return o.cache.Set(obj.ContainerID().String()+"/"+obj.ID().String(), obj)
}
// Delete deletes an object from cache.
func (o *ObjectsCache) Delete(address *object.Address) bool {
return o.cache.Remove(address.String())
}