61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
// Copyright 2021 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"sync"
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"go.uber.org/zap"
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"go.etcd.io/etcd/server/v3/etcdserver/cindex"
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"go.etcd.io/etcd/server/v3/storage/backend"
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"go.etcd.io/etcd/server/v3/storage/schema"
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"go.etcd.io/raft/v3/raftpb"
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)
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type BackendHooks struct {
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indexer cindex.ConsistentIndexer
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lg *zap.Logger
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// confState to Be written in the next submitted Backend transaction (if dirty)
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confState raftpb.ConfState
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// first write changes it to 'dirty'. false by default, so
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// not initialized `confState` is meaningless.
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confStateDirty bool
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confStateLock sync.Mutex
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}
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func NewBackendHooks(lg *zap.Logger, indexer cindex.ConsistentIndexer) *BackendHooks {
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return &BackendHooks{lg: lg, indexer: indexer}
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}
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func (bh *BackendHooks) OnPreCommitUnsafe(tx backend.BatchTx) {
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bh.indexer.UnsafeSave(tx)
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bh.confStateLock.Lock()
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defer bh.confStateLock.Unlock()
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if bh.confStateDirty {
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schema.MustUnsafeSaveConfStateToBackend(bh.lg, tx, &bh.confState)
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// save bh.confState
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bh.confStateDirty = false
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}
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}
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func (bh *BackendHooks) SetConfState(confState *raftpb.ConfState) {
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bh.confStateLock.Lock()
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defer bh.confStateLock.Unlock()
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bh.confState = *confState
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bh.confStateDirty = true
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}
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