[#38] Replace gcache with golang-lru

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

go.mod

@@ -4,13 +4,14 @@ go 1.16
 
 require (
 	github.com/antlr/antlr4/runtime/Go/antlr v0.0.0-20210521073959-f0d4d129b7f1
-	github.com/bluele/gcache v0.0.2
 	github.com/golang/mock v1.6.0
 	github.com/google/uuid v1.2.0
+	github.com/hashicorp/golang-lru v0.5.4
 	github.com/mr-tron/base58 v1.2.0
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.96.1
 	github.com/nspcc-dev/neofs-api-go v1.30.0
+	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/stretchr/testify v1.7.0
 	go.uber.org/zap v1.18.1
 	google.golang.org/grpc v1.41.0

pool/cache.go

@@ -3,44 +3,38 @@ package pool
 import (
 	"strings"
 
-	"github.com/bluele/gcache"
-	"github.com/nspcc-dev/neofs-api-go/pkg/session"
+	lru "github.com/hashicorp/golang-lru"
+	"github.com/nspcc-dev/neofs-sdk-go/session"
 )
 
 type SessionCache struct {
-	cache gcache.Cache
+	cache *lru.Cache
 }
 
-func NewCache() *SessionCache {
-	return &SessionCache{
-		cache: gcache.New(100).Build(),
+func NewCache() (*SessionCache, error) {
+	cache, err := lru.New(100)
+	if err != nil {
+		return nil, err
 	}
+
+	return &SessionCache{cache: cache}, nil
 }
 
 func (c *SessionCache) Get(key string) *session.Token {
-	tokenRaw, err := c.cache.Get(key)
-	if err != nil {
-		return nil
-	}
-	token, ok := tokenRaw.(*session.Token)
+	tokenRaw, ok := c.cache.Get(key)
 	if !ok {
 		return nil
 	}
-
-	return token
+	return tokenRaw.(*session.Token)
 }
 
-func (c *SessionCache) Put(key string, token *session.Token) error {
-	return c.cache.Set(key, token)
+func (c *SessionCache) Put(key string, token *session.Token) bool {
+	return c.cache.Add(key, token)
 }
 
 func (c *SessionCache) DeleteByPrefix(prefix string) {
-	for _, key := range c.cache.Keys(false) {
-		keyStr, ok := key.(string)
-		if !ok {
-			continue
-		}
-		if strings.HasPrefix(keyStr, prefix) {
+	for _, key := range c.cache.Keys() {
+		if strings.HasPrefix(key.(string), prefix) {
 			c.cache.Remove(key)
 		}
 	}

pool/pool.go

@@ -142,7 +142,10 @@ type pool struct {
 }
 
 func newPool(ctx context.Context, options *BuilderOptions) (Pool, error) {
-	cache := NewCache()
+	cache, err := NewCache()
+	if err != nil {
+		return nil, fmt.Errorf("couldn't create cache: %w", err)
+	}
 
 	clientPacks := make([]*clientPack, len(options.weights))
 	var atLeastOneHealthy bool

pool/pool_test.go

@@ -309,7 +309,6 @@ func TestTwoFailed(t *testing.T) {
 
 func TestSessionCache(t *testing.T) {
 	ctrl := gomock.NewController(t)
-	defer ctrl.Finish()
 
 	var tokens []*session.Token
 	clientBuilder := func(opts ...client.Option) (client.Client, error) {
@@ -339,6 +338,7 @@ func TestSessionCache(t *testing.T) {
 	opts := &BuilderOptions{
 		Key:                     &key.PrivateKey,
 		clientBuilder:           clientBuilder,
+		ClientRebalanceInterval: 30 * time.Second,
 	}
 
 	ctx, cancel := context.WithCancel(context.Background())
@@ -371,7 +371,6 @@ func TestSessionCache(t *testing.T) {
 
 func TestSessionCacheWithKey(t *testing.T) {
 	ctrl := gomock.NewController(t)
-	defer ctrl.Finish()
 
 	var tokens []*session.Token
 	clientBuilder := func(opts ...client.Option) (client.Client, error) {
@@ -439,6 +438,9 @@ func TestWaitPresence(t *testing.T) {
 	key, err := keys.NewPrivateKey()
 	require.NoError(t, err)
 
+	cache, err := NewCache()
+	require.NoError(t, err)
+
 	p := &pool{
 		sampler: NewSampler([]float64{1}, rand.NewSource(0)),
 		clientPacks: []*clientPack{{
@@ -446,7 +448,7 @@ func TestWaitPresence(t *testing.T) {
 			healthy: true,
 		}},
 		key:   &key.PrivateKey,
-		cache: NewCache(),
+		cache: cache,
 	}
 
 	t.Run("context canceled", func(t *testing.T) {

pool/sampler_test.go

@@ -77,12 +77,15 @@ func TestHealthyReweight(t *testing.T) {
 	key, err := keys.NewPrivateKey()
 	require.NoError(t, err)
 
+	cache, err := NewCache()
+	require.NoError(t, err)
+
 	p := &pool{
 		sampler: NewSampler(weights, rand.NewSource(0)),
 		clientPacks: []*clientPack{
 			{client: newNetmapMock(names[0], true), healthy: true, address: "address0"},
 			{client: newNetmapMock(names[1], false), healthy: true, address: "address1"}},
-		cache: NewCache(),
+		cache: cache,
 		key:   &key.PrivateKey,
 	}