73 lines
2 KiB
Go
73 lines
2 KiB
Go
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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/policy-engine/pkg/chain"
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"git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
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"github.com/bluele/gcache"
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"go.uber.org/zap"
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)
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// MorphPolicyCache provides lru cache for listing policies stored in policy contract.
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type MorphPolicyCache struct {
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cache gcache.Cache
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logger *zap.Logger
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}
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type MorphPolicyCacheKey struct {
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Target engine.Target
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Name chain.Name
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}
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const (
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// DefaultMorphPolicyCacheSize is a default maximum number of entries in cache.
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DefaultMorphPolicyCacheSize = 1e4
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// DefaultMorphPolicyCacheLifetime is a default lifetime of entries in cache.
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DefaultMorphPolicyCacheLifetime = time.Minute
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)
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// DefaultMorphPolicyConfig returns new default cache expiration values.
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func DefaultMorphPolicyConfig(logger *zap.Logger) *Config {
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return &Config{
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Size: DefaultMorphPolicyCacheSize,
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Lifetime: DefaultMorphPolicyCacheLifetime,
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Logger: logger,
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}
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}
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// NewMorphPolicyCache creates an object of MorphPolicyCache.
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func NewMorphPolicyCache(config *Config) *MorphPolicyCache {
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gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
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return &MorphPolicyCache{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 *MorphPolicyCache) Get(key MorphPolicyCacheKey) []*chain.Chain {
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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.([]*chain.Chain)
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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 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 *MorphPolicyCache) Put(key MorphPolicyCacheKey, list []*chain.Chain) error {
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return o.cache.Set(key, list)
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}
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// Delete deletes an object from cache.
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func (o *MorphPolicyCache) Delete(key MorphPolicyCacheKey) bool {
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return o.cache.Remove(key)
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}
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