[#137] pool: drop sessionTokenThreshold

Description

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

pool/cache.go

@@ -3,7 +3,6 @@ package pool
 import (
 	"strings"
 	"sync/atomic"
-	"time"
 
 	lru "github.com/hashicorp/golang-lru"
 	"github.com/nspcc-dev/neofs-sdk-go/session"
@@ -15,7 +14,6 @@ type sessionCache struct {
 }
 
 type cacheValue struct {
-	atime time.Time
 	token *session.Token
 }
 
@@ -43,8 +41,6 @@ func (c *sessionCache) Get(key string) *session.Token {
 		return nil
 	}
 
-	value.atime = time.Now()
-
 	if value.token == nil {
 		return nil
 	}
@@ -54,18 +50,8 @@ func (c *sessionCache) Get(key string) *session.Token {
 	return &res
 }
 
-func (c *sessionCache) GetAccessTime(key string) (time.Time, bool) {
-	valueRaw, ok := c.cache.Peek(key)
-	if !ok {
-		return time.Time{}, false
-	}
-
-	return valueRaw.(*cacheValue).atime, true
-}
-
 func (c *sessionCache) Put(key string, token *session.Token) bool {
 	return c.cache.Add(key, &cacheValue{
-		atime: time.Now(),
 		token: token,
 	})
 }

pool/cache_test.go

@@ -2,7 +2,6 @@ package pool
 
 import (
 	"testing"
-	"time"
 
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neofs-sdk-go/session"
@@ -10,32 +9,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestSessionCache_GetAccessTime(t *testing.T) {
-	const key = "Foo"
-
-	cache, err := newCache()
-	require.NoError(t, err)
-
-	st := session.NewToken()
-	st.SetExp(1)
-
-	cache.Put(key, st)
-
-	t1, ok := cache.GetAccessTime(key)
-	require.True(t, ok)
-
-	time.Sleep(10 * time.Millisecond)
-
-	t2, ok := cache.GetAccessTime(key)
-	require.True(t, ok)
-	require.Equal(t, t1, t2)
-
-	_ = cache.Get(key)
-	t3, ok := cache.GetAccessTime(key)
-	require.True(t, ok)
-	require.NotEqual(t, t1, t3)
-}
-
 func TestSessionCache_GetUnmodifiedToken(t *testing.T) {
 	const key = "Foo"
 	target := sessiontest.Token()

pool/pool.go

@@ -58,7 +58,6 @@ type InitParameters struct {
 	nodeDialTimeout           time.Duration
 	healthcheckTimeout        time.Duration
 	clientRebalanceInterval   time.Duration
-	sessionTokenThreshold     time.Duration
 	sessionExpirationDuration uint64
 	nodeParams                []NodeParam
 
@@ -94,11 +93,6 @@ func (x *InitParameters) SetClientRebalanceInterval(interval time.Duration) {
 	x.clientRebalanceInterval = interval
 }
 
-// SetSessionThreshold specifies the max session token life time for PutObject operation.
-func (x *InitParameters) SetSessionThreshold(threshold time.Duration) {
-	x.sessionTokenThreshold = threshold
-}
-
 // SetSessionExpirationDuration specifies the session token lifetime in epochs.
 func (x *InitParameters) SetSessionExpirationDuration(expirationDuration uint64) {
 	x.sessionExpirationDuration = expirationDuration
@@ -464,7 +458,6 @@ type Pool struct {
 	closedCh        chan struct{}
 	cache           *sessionCache
 	stokenDuration  uint64
-	stokenThreshold time.Duration
 	rebalanceParams rebalanceParameters
 	clientBuilder   func(endpoint string) (client, error)
 	logger          *zap.Logger
@@ -479,7 +472,6 @@ type innerPool struct {
 const (
 	defaultSessionTokenExpirationDuration = 100 // in blocks
 
-	defaultSessionTokenThreshold = 5 * time.Second
 	defaultRebalanceInterval = 25 * time.Second
 	defaultRequestTimeout    = 4 * time.Second
 )
@@ -508,7 +500,6 @@ func NewPool(options InitParameters) (*Pool, error) {
 		cache:          cache,
 		logger:         options.logger,
 		stokenDuration: options.sessionExpirationDuration,
-		stokenThreshold: options.sessionTokenThreshold,
 		rebalanceParams: rebalanceParameters{
 			nodesParams:               nodesParams,
 			nodeRequestTimeout:        options.healthcheckTimeout,
@@ -580,10 +571,6 @@ func fillDefaultInitParams(params *InitParameters, cache *sessionCache) {
 		params.sessionExpirationDuration = defaultSessionTokenExpirationDuration
 	}
 
-	if params.sessionTokenThreshold <= 0 {
-		params.sessionTokenThreshold = defaultSessionTokenThreshold
-	}
-
 	if params.clientRebalanceInterval <= 0 {
 		params.clientRebalanceInterval = defaultRebalanceInterval
 	}
@@ -818,25 +805,6 @@ func createSessionTokenForDuration(ctx context.Context, c client, dur uint64) (*
 	return c.SessionCreate(ctx, prm)
 }
 
-func (p *Pool) removeSessionTokenAfterThreshold(cfg prmCommon) error {
-	cp, err := p.connection()
-	if err != nil {
-		return err
-	}
-
-	key := p.key
-	if cfg.key != nil {
-		key = cfg.key
-	}
-
-	ts, ok := p.cache.GetAccessTime(formCacheKey(cp.address, key))
-	if ok && time.Since(ts) > p.stokenThreshold {
-		p.cache.DeleteByPrefix(cp.address)
-	}
-
-	return nil
-}
-
 type callContext struct {
 	// base context for RPC
 	context.Context
@@ -940,27 +908,11 @@ func (p *Pool) PutObject(ctx context.Context, prm PrmObjectPut) (*oid.ID, error)
 	prm.useVerb(sessionv2.ObjectVerbPut)
 	prm.useAddress(newAddressFromCnrID(prm.hdr.ContainerID()))
 
-	// Put object is different from other object service methods. Put request
-	// can't be resent in case of session token failures (i.e. session token is
-	// invalid due to lifetime expiration or server restart). The reason is that
-	// object's payload can be provided as a stream that should be read only once.
-	//
-	// To solve this issue, pool regenerates session tokens upon each request.
-	// In case of subsequent requests, pool avoids session token initialization
-	// by checking when the session token was accessed for the last time. If it
-	// hits a threshold, session token is removed from cache for a new one to be
-	// issued.
-	err := p.removeSessionTokenAfterThreshold(prm.prmCommon)
-	if err != nil {
-		return nil, err
-	}
-
 	var ctxCall callContext
 
 	ctxCall.Context = ctx
 
-	err = p.initCallContext(&ctxCall, prm.prmCommon)
+	if err := p.initCallContext(&ctxCall, prm.prmCommon); err != nil {
-	if err != nil {
 		return nil, fmt.Errorf("init call context")
 	}