forked from TrueCloudLab/frostfs-node
122 lines
2.3 KiB
Go
122 lines
2.3 KiB
Go
package metrics
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import (
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"encoding/binary"
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"encoding/hex"
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"sync"
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"github.com/nspcc-dev/neofs-api-go/refs"
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"github.com/nspcc-dev/neofs-node/lib/core"
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"go.uber.org/zap"
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)
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type (
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syncStore struct {
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log *zap.Logger
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store core.Bucket
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mutex sync.RWMutex
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items map[refs.CID]uint64
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}
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// SpaceOp is an enumeration of space size operations.
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SpaceOp int
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)
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const (
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_ SpaceOp = iota
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// AddSpace is a SpaceOp of space size increasing.
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AddSpace
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// RemSpace is a SpaceOp of space size decreasing.
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RemSpace
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)
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func newSyncStore(log *zap.Logger, store core.Bucket) *syncStore {
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return &syncStore{
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log: log,
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store: store,
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items: make(map[refs.CID]uint64),
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}
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}
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func (m *syncStore) Load() {
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m.mutex.Lock()
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defer m.mutex.Unlock()
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_ = m.store.Iterate(func(key, val []byte) bool {
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cid, err := refs.CIDFromBytes(key)
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if err != nil {
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m.log.Error("could not load space value", zap.Error(err))
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return true
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}
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m.items[cid] += binary.BigEndian.Uint64(val)
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return true
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})
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}
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func (m *syncStore) Reset(items map[refs.CID]uint64) {
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m.mutex.Lock()
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defer m.mutex.Unlock()
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m.items = items
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if items == nil {
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m.items = make(map[refs.CID]uint64)
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}
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keys, err := m.store.List()
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if err != nil {
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m.log.Error("could not fetch keys space metrics", zap.Error(err))
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return
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}
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// cleanup metrics store
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for i := range keys {
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if err := m.store.Del(keys[i]); err != nil {
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cid := hex.EncodeToString(keys[i])
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m.log.Error("could not remove key",
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zap.String("cid", cid),
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zap.Error(err))
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}
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}
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buf := make([]byte, 8)
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for cid := range items {
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binary.BigEndian.PutUint64(buf, items[cid])
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if err := m.store.Set(cid.Bytes(), buf); err != nil {
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m.log.Error("could not store space value",
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zap.Stringer("cid", cid),
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zap.Error(err))
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}
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}
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}
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func (m *syncStore) Update(cid refs.CID, size uint64, op SpaceOp) {
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m.mutex.Lock()
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defer m.mutex.Unlock()
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switch op {
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case RemSpace:
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if m.items[cid] < size {
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m.log.Error("space could not be negative")
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return
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}
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m.items[cid] -= size
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case AddSpace:
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m.items[cid] += size
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default:
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m.log.Error("unknown space operation", zap.Int("op", int(op)))
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return
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}
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buf := make([]byte, 8)
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binary.BigEndian.PutUint64(buf, m.items[cid])
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if err := m.store.Set(cid.Bytes(), buf); err != nil {
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m.log.Error("could not update space size", zap.Int("op", int(op)))
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}
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}
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