frostfs-node/lib/metrics/store.go
alexvanin dadfd90dcd Initial commit
Initial public review release v0.10.0
2020-07-10 17:45:00 +03:00

122 lines
2.3 KiB
Go

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