mirror of
https://github.com/etcd-io/etcd.git
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62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Copyright 2015 CoreOS, Inc.
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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 etcdserver
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import (
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"github.com/coreos/etcd/raft"
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"github.com/coreos/etcd/raft/raftpb"
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)
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type raftStorage struct {
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*raft.MemoryStorage
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// snapStore is the place to request snapshot when v3demo is enabled.
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// If snapStore is nil, it uses the snapshot saved in MemoryStorage.
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snapStore *snapshotStore
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}
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func newRaftStorage() *raftStorage {
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return &raftStorage{
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MemoryStorage: raft.NewMemoryStorage(),
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}
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}
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func (rs *raftStorage) reqsnap() <-chan struct{} {
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if rs.snapStore == nil {
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return nil
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}
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return rs.snapStore.reqsnapc
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}
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func (rs *raftStorage) raftsnap() chan<- raftpb.Snapshot {
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if rs.snapStore == nil {
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return nil
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}
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return rs.snapStore.raftsnapc
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}
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// Snapshot returns raft snapshot. If snapStore is nil, this method
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// returns snapshot saved in MemoryStorage. If snapStore exists, this method
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// returns snapshot from snapStore.
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func (rs *raftStorage) Snapshot() (raftpb.Snapshot, error) {
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if rs.snapStore == nil {
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return rs.MemoryStorage.Snapshot()
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}
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snap, err := rs.snapStore.getSnap()
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if err != nil {
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return raftpb.Snapshot{}, err
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}
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return snap.raft(), nil
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}
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