121 lines
3.7 KiB
Go
121 lines
3.7 KiB
Go
/*
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* Copyright 1999-2020 Alibaba Group Holding Ltd.
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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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*/
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package cache
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"strconv"
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"github.com/nacos-group/nacos-sdk-go/v2/common/constant"
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"github.com/nacos-group/nacos-sdk-go/v2/common/file"
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"github.com/nacos-group/nacos-sdk-go/v2/common/logger"
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"github.com/nacos-group/nacos-sdk-go/v2/model"
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"github.com/nacos-group/nacos-sdk-go/v2/util"
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"github.com/pkg/errors"
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)
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func GetFileName(cacheKey string, cacheDir string) string {
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return cacheDir + string(os.PathSeparator) + cacheKey
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}
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func WriteServicesToFile(service *model.Service, cacheKey, cacheDir string) {
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err := file.MkdirIfNecessary(cacheDir)
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if err != nil {
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logger.Errorf("mkdir cacheDir failed,cacheDir:%s,err:", cacheDir, err)
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return
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}
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bytes, _ := json.Marshal(service)
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domFileName := GetFileName(cacheKey, cacheDir)
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err = ioutil.WriteFile(domFileName, bytes, 0666)
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if err != nil {
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logger.Errorf("failed to write name cache:%s ,value:%s ,err:%v", domFileName, string(bytes), err)
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}
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}
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func ReadServicesFromFile(cacheDir string) map[string]model.Service {
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files, err := ioutil.ReadDir(cacheDir)
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if err != nil {
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logger.Errorf("read cacheDir:%s failed!err:%+v", cacheDir, err)
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return nil
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}
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serviceMap := map[string]model.Service{}
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for _, f := range files {
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fileName := GetFileName(f.Name(), cacheDir)
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b, err := ioutil.ReadFile(fileName)
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if err != nil {
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logger.Errorf("failed to read name cache file:%s,err:%+v ", fileName, err)
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continue
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}
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s := string(b)
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service := util.JsonToService(s)
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if service == nil {
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continue
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}
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cacheKey := util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName), service.Clusters)
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serviceMap[cacheKey] = *service
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}
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logger.Infof("finish loading name cache, total: %s", strconv.Itoa(len(files)))
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return serviceMap
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}
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func WriteConfigToFile(cacheKey string, cacheDir string, content string) {
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file.MkdirIfNecessary(cacheDir)
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fileName := GetFileName(cacheKey, cacheDir)
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if len(content) == 0 {
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// delete config snapshot
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if err := os.Remove(fileName); err != nil {
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logger.Errorf("failed to delete config file,cache:%s ,value:%s ,err:%+v", fileName, content, err)
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}
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return
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}
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err := ioutil.WriteFile(fileName, []byte(content), 0666)
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if err != nil {
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logger.Errorf("failed to write config cache:%s ,value:%s ,err:%+v", fileName, content, err)
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}
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}
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func ReadConfigFromFile(cacheKey string, cacheDir string) (string, error) {
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fileName := GetFileName(cacheKey, cacheDir)
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b, err := ioutil.ReadFile(fileName)
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if err != nil {
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return "", errors.New(fmt.Sprintf("failed to read config cache file:%s,err:%+v ", fileName, err))
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}
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return string(b), nil
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}
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// GetFailover , get failover content
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func GetFailover(key, dir string) string {
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filePath := dir + string(os.PathSeparator) + key + constant.FAILOVER_FILE_SUFFIX
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if !file.IsExistFile(filePath) {
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return ""
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}
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logger.GetLogger().Warn(fmt.Sprintf("reading failover content from path:%s", filePath))
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fileContent, err := ioutil.ReadFile(filePath)
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if err != nil {
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logger.GetLogger().Error(fmt.Sprintf("fail to read failover content from %s", filePath))
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return ""
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}
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return string(fileContent)
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}
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