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- // Copyright 2016 The etcd Authors
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package mvcc
- import (
- "encoding/binary"
- "fmt"
- "go.etcd.io/etcd/mvcc/backend"
- "go.etcd.io/etcd/mvcc/mvccpb"
- )
- func UpdateConsistentIndex(be backend.Backend, index uint64) {
- tx := be.BatchTx()
- tx.Lock()
- defer tx.Unlock()
- var oldi uint64
- _, vs := tx.UnsafeRange(metaBucketName, consistentIndexKeyName, nil, 0)
- if len(vs) != 0 {
- oldi = binary.BigEndian.Uint64(vs[0])
- }
- if index <= oldi {
- return
- }
- bs := make([]byte, 8)
- binary.BigEndian.PutUint64(bs, index)
- tx.UnsafePut(metaBucketName, consistentIndexKeyName, bs)
- }
- func WriteKV(be backend.Backend, kv mvccpb.KeyValue) {
- ibytes := newRevBytes()
- revToBytes(revision{main: kv.ModRevision}, ibytes)
- d, err := kv.Marshal()
- if err != nil {
- panic(fmt.Errorf("cannot marshal event: %v", err))
- }
- be.BatchTx().Lock()
- be.BatchTx().UnsafePut(keyBucketName, ibytes, d)
- be.BatchTx().Unlock()
- }
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