forked from TrueCloudLab/frostfs-s3-gw
65 lines
1.6 KiB
Go
65 lines
1.6 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-s3-gw/api/data"
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"go.uber.org/zap"
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)
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// BucketCache contains cache with objects and the lifetime of cache entries.
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type BucketCache 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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// DefaultBucketCacheSize is a default maximum number of entries in cache.
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DefaultBucketCacheSize = 1e3
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// DefaultBucketCacheLifetime is a default lifetime of entries in cache.
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DefaultBucketCacheLifetime = time.Minute
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)
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// DefaultBucketConfig returns new default cache expiration values.
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func DefaultBucketConfig(logger *zap.Logger) *Config {
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return &Config{
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Size: DefaultBucketCacheSize,
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Lifetime: DefaultBucketCacheLifetime,
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Logger: logger,
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}
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}
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// NewBucketCache creates an object of BucketCache.
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func NewBucketCache(config *Config) *BucketCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &BucketCache{cache: gc, logger: config.Logger}
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}
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// Get returns a cached object.
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func (o *BucketCache) Get(key string) *data.BucketInfo {
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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.(*data.BucketInfo)
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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", "*data.BucketInfo"))
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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 *BucketCache) Put(bkt *data.BucketInfo) error {
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return o.cache.Set(bkt.Name, bkt)
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}
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// Delete deletes an object from cache.
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func (o *BucketCache) Delete(key string) bool {
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return o.cache.Remove(key)
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}
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