tidb globalconfig 源码
tidb globalconfig 代码
文件路径：/domain/globalconfigsync/globalconfig.go
// Copyright 2021 PingCAP, Inc.
//
// 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 globalconfigsync
import (
"context"
"github.com/pingcap/tidb/util/logutil"
pd "github.com/tikv/pd/client"
"go.uber.org/zap"
)
// GlobalConfigSyncer is used to sync pd global config.
type GlobalConfigSyncer struct {
pd pd.Client
NotifyCh chan pd.GlobalConfigItem
}
// NewGlobalConfigSyncer creates a GlobalConfigSyncer.
func NewGlobalConfigSyncer(p pd.Client) *GlobalConfigSyncer {
return &GlobalConfigSyncer{
pd: p,
NotifyCh: make(chan pd.GlobalConfigItem, 8),
}
}
// StoreGlobalConfig is used to store global config.
func (s *GlobalConfigSyncer) StoreGlobalConfig(ctx context.Context, item pd.GlobalConfigItem) error {
if s.pd == nil {
return nil
}
err := s.pd.StoreGlobalConfig(ctx, []pd.GlobalConfigItem{item})
if err != nil {
return err
}
logutil.BgLogger().Info("store global config", zap.String("name", item.Name), zap.String("value", item.Value))
return nil
}
// Notify pushes global config to internal channel and will be sync into pd's GlobalConfig.
func (s *GlobalConfigSyncer) Notify(globalConfigItem pd.GlobalConfigItem) {
s.NotifyCh <- globalConfigItem
}
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