tidb schedule_manager 源码

2022-09-19
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tidb schedule_manager 代码

文件路径：/domain/infosync/schedule_manager.go

// Copyright 2022 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 infosync

import (
	"bytes"
	"context"
	"encoding/json"
	"path"
	"sync"

	"github.com/pingcap/errors"
	"github.com/pingcap/tidb/util/pdapi"
	clientv3 "go.etcd.io/etcd/client/v3"
)

// ScheduleManager manages schedule configs
type ScheduleManager interface {
	GetPDScheduleConfig(ctx context.Context) (map[string]interface{}, error)
	SetPDScheduleConfig(ctx context.Context, config map[string]interface{}) error
}

// PDScheduleManager manages schedule with pd
type PDScheduleManager struct {
	etcdCli *clientv3.Client
}

// GetPDScheduleConfig get schedule config from pd
func (sm *PDScheduleManager) GetPDScheduleConfig(ctx context.Context) (map[string]interface{}, error) {
	ret, err := doRequest(ctx, "GetPDSchedule", sm.etcdCli.Endpoints(), path.Join(pdapi.Config, "schedule"), "GET", nil)
	if err != nil {
		return nil, errors.Trace(err)
	}

	var schedule map[string]interface{}
	if err = json.Unmarshal(ret, &schedule); err != nil {
		return nil, errors.Trace(err)
	}

	return schedule, nil
}

// SetPDScheduleConfig set schedule config to pd
func (sm *PDScheduleManager) SetPDScheduleConfig(ctx context.Context, config map[string]interface{}) error {
	configJSON, err := json.Marshal(config)
	if err != nil {
		return err
	}

	_, err = doRequest(ctx, "SetPDSchedule", sm.etcdCli.Endpoints(), path.Join(pdapi.Config, "schedule"), "POST", bytes.NewReader(configJSON))
	if err != nil {
		return errors.Trace(err)
	}

	return nil
}

type mockScheduleManager struct {
	sync.RWMutex
	schedules map[string]interface{}
}

// GetPDScheduleConfig get schedule config from schedules map
func (mm *mockScheduleManager) GetPDScheduleConfig(ctx context.Context) (map[string]interface{}, error) {
	mm.Lock()

	schedules := make(map[string]interface{})
	for key, values := range mm.schedules {
		schedules[key] = values
	}

	mm.Unlock()
	return schedules, nil
}

// SetPDScheduleConfig set schedule config to schedules map
func (mm *mockScheduleManager) SetPDScheduleConfig(ctx context.Context, config map[string]interface{}) error {
	mm.Lock()

	if mm.schedules == nil {
		mm.schedules = make(map[string]interface{})
	}
	for key, value := range config {
		mm.schedules[key] = value
	}

	mm.Unlock()
	return nil
}

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本文标签： 大数据 golang
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