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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 config
import (
"configcenter/src/common/blog"
"configcenter/src/common/confregdiscover"
"configcenter/src/common/core/cc/api"
"configcenter/src/common/errors"
"configcenter/src/common/types"
"context"
"encoding/json"
"sync"
)
// ConfCenter discover configure changed. get, update configures
type ConfCenter struct {
confRegDiscv *confregdiscover.ConfRegDiscover
rootCtx context.Context
cancel context.CancelFunc
ctx []byte
errorcode map[string]errors.ErrorCode
ctxLock sync.RWMutex
}
// NewConfCenter create a ConfCenter object
func NewConfCenter(serv string) *ConfCenter {
return &ConfCenter{
ctx: nil,
confRegDiscv: confregdiscover.NewConfRegDiscover(serv),
}
}
// Start the configure center module service
func (cc *ConfCenter) Start() error {
// create root context
cc.rootCtx, cc.cancel = context.WithCancel(context.Background())
// start configure register and discover service
if err := cc.confRegDiscv.Start(); err != nil {
blog.Errorf("fail to start config register and discover service. err:%s", err.Error())
return err
}
// here: discover itselft configure
confPath := types.CC_SERVCONF_BASEPATH + "/" + types.CC_MODULE_HOSTCONTROLLER
confEvent, err := cc.confRegDiscv.DiscoverConfig(confPath)
if err != nil {
blog.Errorf("fail to discover configure for migrate service. err:%s", err.Error())
return err
}
languageEvent, err := cc.confRegDiscv.DiscoverConfig(types.CC_SERVERROR_BASEPATH)
if err != nil {
blog.Errorf("fail to discover configure for migrate service. err:%s", err.Error())
return err
}
for {
select {
case confEvn := <-confEvent:
cc.dealConfChangeEvent(confEvn.Data)
case confEvn := <-languageEvent:
cc.dealLanguageEvent(confEvn.Data)
case <-cc.rootCtx.Done():
blog.Warn("configure discover service done")
return nil
}
}
}
// Stop the configure center
func (cc *ConfCenter) Stop() error {
cc.cancel()
cc.confRegDiscv.Stop()
return nil
}
// GetConfigureCtx fetch the configure
func (cc *ConfCenter) GetConfigureCxt() []byte {
cc.ctxLock.RLock()
defer cc.ctxLock.RUnlock()
return cc.ctx
}
func (cc *ConfCenter) dealConfChangeEvent(data []byte) error {
blog.Info("%s configure has changed", types.CC_MODULE_HOSTCONTROLLER)
cc.ctxLock.Lock()
defer cc.ctxLock.Unlock()
cc.ctx = data
return nil
}
// GetLanguageCxt fetch the language packages
func (cc *ConfCenter) GetLanguageCxt() map[string]errors.ErrorCode {
cc.ctxLock.RLock()
defer cc.ctxLock.RUnlock()
return cc.errorcode
}
func (cc *ConfCenter) dealLanguageEvent(data []byte) error {
blog.Info("language has changed")
cc.ctxLock.Lock()
defer cc.ctxLock.Unlock()
errorcode := map[string]errors.ErrorCode{}
err := json.Unmarshal(data, &errorcode)
if err != nil {
return err
}
cc.errorcode = errorcode
a := api.GetAPIResource()
if a.Error != nil {
a.Error.Load(errorcode)
}
return nil
}