mirror of
https://github.com/EchoVault/SugarDB.git
synced 2025-09-27 04:16:06 +08:00
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
// Copyright 2024 Kelvin Clement Mwinuka
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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 raft
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import (
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"encoding/json"
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"github.com/echovault/sugardb/internal"
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"github.com/echovault/sugardb/internal/config"
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"github.com/hashicorp/raft"
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"strconv"
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"strings"
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"time"
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)
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type SnapshotOpts struct {
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config config.Config
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data map[int]map[string]internal.KeyData
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startSnapshot func()
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finishSnapshot func()
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setLatestSnapshotTime func(msec int64)
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}
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type Snapshot struct {
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options SnapshotOpts
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}
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func NewFSMSnapshot(opts SnapshotOpts) *Snapshot {
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return &Snapshot{
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options: opts,
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}
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}
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// Persist implements FSMSnapshot interface
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func (s *Snapshot) Persist(sink raft.SnapshotSink) error {
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s.options.startSnapshot()
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msec, err := strconv.Atoi(strings.Split(sink.ID(), "-")[2])
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if err != nil {
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_ = sink.Cancel()
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return err
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}
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snapshotObject := internal.SnapshotObject{
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State: internal.FilterExpiredKeys(time.Now(), s.options.data),
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LatestSnapshotMilliseconds: int64(msec),
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}
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o, err := json.Marshal(snapshotObject)
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if err != nil {
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_ = sink.Cancel()
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return err
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}
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if _, err = sink.Write(o); err != nil {
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_ = sink.Cancel()
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return err
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}
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s.options.setLatestSnapshotTime(int64(msec))
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return nil
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}
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// Release implements FSMSnapshot interface
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func (s *Snapshot) Release() {
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s.options.finishSnapshot()
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}
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