71 lines
1.9 KiB
Go
71 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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"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
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"github.com/bluele/gcache"
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"go.uber.org/zap"
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)
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// AccessControlCache provides lru cache for objects.
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type AccessControlCache 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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// DefaultAccessControlCacheLifetime is a default lifetime of entries in access' cache.
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DefaultAccessControlCacheLifetime = 1 * time.Minute
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// DefaultAccessControlCacheSize is a default maximum number of entries in access' cache.
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DefaultAccessControlCacheSize = 1e5
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)
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// DefaultAccessControlConfig returns new default cache expiration values.
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func DefaultAccessControlConfig(logger *zap.Logger) *Config {
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return &Config{
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Size: DefaultAccessControlCacheSize,
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Lifetime: DefaultAccessControlCacheLifetime,
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Logger: logger,
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}
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}
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// NewAccessControlCache creates an object of AccessControlCache.
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func NewAccessControlCache(config *Config) *AccessControlCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &AccessControlCache{cache: gc, logger: config.Logger}
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}
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// Get returns true if such key exists.
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func (o *AccessControlCache) Get(owner user.ID, key string) bool {
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entry, err := o.cache.Get(cacheKey(owner, key))
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if err != nil {
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return false
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}
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result, ok := entry.(bool)
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if !ok {
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o.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
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zap.String("expected", fmt.Sprintf("%T", result)))
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return false
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}
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return result
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}
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// Put puts an item to cache.
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func (o *AccessControlCache) Put(owner user.ID, key string) error {
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return o.cache.Set(cacheKey(owner, key), true)
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}
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// Delete deletes an object from cache.
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func (o *AccessControlCache) Delete(owner user.ID, key string) bool {
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return o.cache.Remove(cacheKey(owner, key))
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}
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func cacheKey(owner user.ID, key string) string {
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return owner.EncodeToString() + key
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}
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