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repository.go
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package agollo
import (
"strconv"
"github.com/coocood/freecache"
)
const (
empty = ""
//50m
apolloConfigCacheSize=50*1024*1024
//1 minute
configCacheExpireTime=120
)
var (
currentConnApolloConfig = &ApolloConnConfig{}
//config from apollo
apolloConfigCache = freecache.NewCache(apolloConfigCacheSize)
)
func updateApolloConfig(apolloConfig *ApolloConfig) {
if apolloConfig==nil{
logger.Error("apolloConfig is null,can't update!")
return
}
//get change list
changeList := updateApolloConfigCache(apolloConfig.Configurations, configCacheExpireTime)
if len(changeList) > 0 {
//create config change event base on change list
event := createConfigChangeEvent(changeList, apolloConfig.NamespaceName)
//push change event to channel
pushChangeEvent(event)
}
//update apollo connection config
currentConnApolloConfig.Lock()
defer currentConnApolloConfig.Unlock()
currentConnApolloConfig=&apolloConfig.ApolloConnConfig
}
func updateApolloConfigCache(configurations map[string]string,expireTime int) map[string]*ConfigChange {
if (configurations==nil||len(configurations)==0)&& apolloConfigCache.EntryCount() == 0 {
return nil
}
//get old keys
mp := map[string]bool{}
it := apolloConfigCache.NewIterator()
for en := it.Next(); en != nil; en = it.Next() {
mp[string(en.Key)] = true
}
changes:=make(map[string]*ConfigChange)
if configurations != nil {
// update new
// keys
for key, value := range configurations {
//key state insert or update
//insert
if !mp[key] {
changes[key] = createAddConfigChange(value)
} else {
//update
oldValue, _ := apolloConfigCache.Get([]byte(key))
if string(oldValue) != value {
changes[key] = createModifyConfigChange(string(oldValue), value)
}
}
apolloConfigCache.Set([]byte(key), []byte(value), expireTime)
delete(mp, string(key))
}
}
// remove del keys
for key := range mp {
//get old value and del
oldValue, _ := apolloConfigCache.Get([]byte(key))
changes[key]=createDeletedConfigChange(string(oldValue))
apolloConfigCache.Del([]byte(key))
}
return changes
}
//base on changeList create Change event
func createConfigChangeEvent(changes map[string]*ConfigChange,nameSpace string) *ChangeEvent {
return &ChangeEvent{
Namespace:nameSpace,
Changes:changes,
}
}
func touchApolloConfigCache() error{
updateApolloConfigCacheTime(configCacheExpireTime)
return nil
}
func updateApolloConfigCacheTime(expireTime int) {
it := apolloConfigCache.NewIterator()
for i := int64(0); i < apolloConfigCache.EntryCount(); i++ {
entry := it.Next()
if entry==nil{
break
}
apolloConfigCache.Set([]byte(entry.Key),[]byte(entry.Value),expireTime)
}
}
func GetApolloConfigCache() *freecache.Cache {
return apolloConfigCache
}
func GetCurrentApolloConfig()*ApolloConnConfig {
currentConnApolloConfig.RLock()
defer currentConnApolloConfig.RUnlock()
return currentConnApolloConfig
}
func getConfigValue(key string) interface{} {
value,err:=apolloConfigCache.Get([]byte(key))
if err!=nil{
logger.Error("get config value fail!err:",err)
return empty
}
return string(value)
}
func getValue(key string)string{
value:=getConfigValue(key)
if value==nil{
return empty
}
return value.(string)
}
func GetStringValue(key string,defaultValue string)string{
value:=getValue(key)
if value==empty{
return defaultValue
}
return value
}
func GetIntValue(key string,defaultValue int) int {
value :=getValue(key)
i,err:=strconv.Atoi(value)
if err!=nil{
logger.Debug("convert to int fail!error:",err)
return defaultValue
}
return i
}
func GetFloatValue(key string,defaultValue float64) float64 {
value :=getValue(key)
i,err:=strconv.ParseFloat(value,64)
if err!=nil{
logger.Debug("convert to float fail!error:",err)
return defaultValue
}
return i
}
func GetBoolValue(key string,defaultValue bool) bool {
value :=getValue(key)
b,err:=strconv.ParseBool(value)
if err!=nil{
logger.Debug("convert to bool fail!error:",err)
return defaultValue
}
return b
}