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conf.go
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conf.go
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/*
* Tencent is pleased to support the open source community by making 蓝鲸 available.
* Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* 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 configures
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"configcenter/src/common/backbone/service_mange/zk"
"configcenter/src/common/blog"
"configcenter/src/common/confregdiscover"
"configcenter/src/common/errors"
"configcenter/src/common/language"
"configcenter/src/common/types"
"github.com/fsnotify/fsnotify"
"github.com/spf13/viper"
)
// ConfCenter discover configure changed. get, update configures
type ConfCenter struct {
confRegDiscv confregdiscover.ConfRegDiscvIf
ctx context.Context
}
// NewConfCenter create a ConfCenter object
func NewConfCenter(ctx context.Context, client *zk.ZkClient) *ConfCenter {
return &ConfCenter{
ctx: ctx,
confRegDiscv: confregdiscover.NewZkRegDiscover(client),
}
}
// Ping to ping server
func (cc *ConfCenter) Ping() error {
return cc.confRegDiscv.Ping()
}
// Start the configure center module service
func (cc *ConfCenter) Start(confDir, errRes, languageRes string) error {
// save configures
if err := cc.writeConfs2Center(confDir); err != nil {
blog.Errorf("fail to write configures to center, err:%s", err.Error())
return err
} else {
blog.Infof("write all configures resource to center %v success", types.CC_SERVCONF_BASEPATH)
}
if err := cc.writeErrorRes2Center(errRes); err != nil {
blog.Errorf("fail to write error resource to center, err:%s", err.Error())
return err
} else {
blog.Infof("write error resource to center %v success", types.CC_SERVERROR_BASEPATH)
}
if err := cc.writeLanguageRes2Center(languageRes); err != nil {
blog.Errorf("fail to write language packages to center, err:%s", err.Error())
return err
} else {
blog.Infof("write language packages to center %v success", types.CC_SERVLANG_BASEPATH)
}
// TODO discover config file change
go func() {
select {
case <-cc.ctx.Done():
}
}()
return nil
}
func (cc *ConfCenter) writeErrorRes2Center(errorres string) error {
info, err := os.Stat(errorres)
if os.ErrNotExist == err {
return fmt.Errorf("directory %s not exists", errorres)
}
if err != nil {
return fmt.Errorf("stat directory %s faile, %s", errorres, err.Error())
}
if !info.IsDir() {
return fmt.Errorf("%s is not directory", errorres)
}
errcode, err := errors.LoadErrorResourceFromDir(errorres)
if err != nil {
return fmt.Errorf("load error resource error: %s", err)
}
data, err := json.Marshal(errcode)
if err != nil {
return fmt.Errorf("unmarshal resource failed, err: %s", err)
}
key := types.CC_SERVERROR_BASEPATH
return cc.confRegDiscv.Write(key, data)
}
func (cc *ConfCenter) writeLanguageRes2Center(languageres string) error {
info, err := os.Stat(languageres)
if os.ErrNotExist == err {
return fmt.Errorf("directory %s not exists", languageres)
}
if err != nil {
return err
}
if !info.IsDir() {
return fmt.Errorf("%s is not directory", languageres)
}
languagepack, err := language.LoadLanguageResourceFromDir(languageres)
if err != nil {
return fmt.Errorf("load language resource error: %s", err)
}
data, err := json.Marshal(languagepack)
if err != nil {
return err
}
key := types.CC_SERVLANG_BASEPATH
return cc.confRegDiscv.Write(key, data)
}
// WriteConfs2Center save configures into center.
// parameter[confRootPath] define the configure's root path, the configure files are
// redis.conf, mongodb.conf,common.conf,extra.conf
func (cc *ConfCenter) writeConfs2Center(confRootPath string) error {
configs := []string{
types.CCConfigureRedis,
types.CCConfigureMongo,
types.CCConfigureCommon,
types.CCConfigureExtra,
}
confFileSuffix := ".yaml"
for _, configName := range configs {
filePath := filepath.Join(confRootPath, configName+confFileSuffix)
key := types.CC_SERVCONF_BASEPATH + "/" + configName
if err := cc.writeConfigure(filePath, key); err != nil {
blog.Warnf("fail to write configure of %s into center", configName)
continue
} else {
blog.Infof("write configure to center %s success", key)
cc.listenFileChange(key,filePath)
}
}
return nil
}
func (cc *ConfCenter) writeConfigure(confFilePath, key string) error {
confFile, err := os.Open(confFilePath)
if err != nil {
blog.Errorf("fail to open file(%s), err(%s)", confFilePath, err.Error())
return err
}
defer confFile.Close()
data, err := ioutil.ReadAll(confFile)
if err != nil {
blog.Errorf("fail to read all data from config file(%s), err:%s", confFilePath, err.Error())
return err
}
blog.V(3).Infof("write configure(%s), key(%s), data(%s)", confFilePath, key, data)
if err := cc.confRegDiscv.Write(key, data); err != nil {
blog.Errorf("fail to write configure(%s) data into center. err:%s", key, err.Error())
return err
}
return nil
}
var redisViper *viper.Viper
var mongodbViper *viper.Viper
var commonViper *viper.Viper
var extraViper *viper.Viper
//此方法给adminserver实现热更新,监听每个文件,当文件发生更改时,将改后的数据重新写到注册中心
func (cc *ConfCenter) listenFileChange(configcenterPath string,filePath string) {
v := viper.New()
base := path.Base(filePath)
split := strings.Split(base, ".")
fileName := split[0]
v.SetConfigName(fileName)
v.AddConfigPath(path.Dir(filePath))
err := v.ReadInConfig()
if err != nil {
blog.Warnf("fail to read configure from %s ", base)
}
v.WatchConfig()
v.OnConfigChange(func(e fsnotify.Event) {
if err := cc.writeConfigure(filePath, configcenterPath); err != nil {
blog.Warnf("fail to write configure of %s into center", base)
} else {
blog.Infof("write configure to center %s success", configcenterPath)
}
})
if fileName == types.CCConfigureRedis {
redisViper = v
} else if fileName == types.CCConfigureMongo {
mongodbViper = v
} else if fileName == types.CCConfigureCommon {
commonViper = v
} else if fileName == types.CCConfigureExtra {
extraViper = v
}
}