frostfs-node/pkg/innerring/indexer.go

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package innerring
import (
"crypto/ecdsa"
"sync"
"time"
"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
"github.com/pkg/errors"
)
type (
innerRingIndexer struct {
sync.RWMutex
cli *client.Client
key *ecdsa.PublicKey
timeout time.Duration
ind indexes
lastAccess time.Time
}
indexes struct {
innerRingIndex, innerRingSize int32
alphabetIndex int32
}
)
func newInnerRingIndexer(cli *client.Client, key *ecdsa.PublicKey, to time.Duration) *innerRingIndexer {
return &innerRingIndexer{
cli: cli,
key: key,
timeout: to,
}
}
func (s *innerRingIndexer) update() (ind indexes, err error) {
s.RLock()
if time.Since(s.lastAccess) < s.timeout {
s.RUnlock()
return s.ind, nil
}
s.RUnlock()
s.Lock()
defer s.Unlock()
if time.Since(s.lastAccess) < s.timeout {
return s.ind, nil
}
s.ind.innerRingIndex, s.ind.innerRingSize, err = invoke.InnerRingIndex(s.cli, s.key)
if err != nil {
return indexes{}, err
}
s.ind.alphabetIndex, err = invoke.AlphabetIndex(s.cli, s.key)
if err != nil {
return indexes{}, err
}
s.lastAccess = time.Now()
return s.ind, nil
}
func (s *innerRingIndexer) InnerRingIndex() (int32, error) {
ind, err := s.update()
if err != nil {
return 0, errors.Wrap(err, "can't update index state")
}
return ind.innerRingIndex, nil
}
func (s *innerRingIndexer) InnerRingSize() (int32, error) {
ind, err := s.update()
if err != nil {
return 0, errors.Wrap(err, "can't update index state")
}
return ind.innerRingSize, nil
}
func (s *innerRingIndexer) AlphabetIndex() (int32, error) {
ind, err := s.update()
if err != nil {
return 0, errors.Wrap(err, "can't update index state")
}
return ind.alphabetIndex, nil
}