/
config.go
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/
config.go
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/*
* Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 config
import (
"encoding/json"
"fmt"
"io/ioutil"
"sync"
log "code.google.com/p/log4go"
"github.com/BurntSushi/toml"
)
var (
cfg *Configuration
lock = new(sync.RWMutex)
)
type ApiConfig struct {
Port int
Bind string
}
type StorageConfig struct {
DSN string
MaxIdle int
MaxOpen int
}
type InfluxDbConfig struct {
User string
Password string
Host string
Database string
}
type LoggingConfig struct {
File string
Level string
}
type NameServerConfig struct {
Bind string
Port int
Secret string
LogQuery bool
CompressQuery bool
}
type TomlConfiguration struct {
Api ApiConfig
Storage StorageConfig
Influx InfluxDbConfig
Logging LoggingConfig
NameServer NameServerConfig
}
type Configuration struct {
ApiServerBind string
ApiServerPort int
StorageDSN string
StorageMaxIdle int
StorageMaxOpen int
InfluxUser string
InfluxPassword string
InfluxHost string
InfluxDb string
LogLevel string
LogFile string
NameServerBind string
NameServerPort int
NameServerSecret string
LogQuery bool
CompressQuery bool
}
func LoadConfiguration(fileName string) (*Configuration, error) {
log.Info("Loading configuration file %s", fileName)
config, err := parseTomlConfiguration(fileName)
if err != nil {
fmt.Println("Couldn't parse configuration file: " + fileName)
fmt.Println(err)
return nil, err
}
lock.Lock()
cfg = config
lock.Unlock()
return cfg, nil
}
func GetConfig() *Configuration {
lock.RLock()
defer lock.RUnlock()
return cfg
}
func parseTomlConfiguration(filename string) (*Configuration, error) {
body, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
tomlConfiguration := &TomlConfiguration{}
_, err = toml.Decode(string(body), tomlConfiguration)
if err != nil {
return nil, err
}
config := &Configuration{
ApiServerBind: tomlConfiguration.Api.Bind,
ApiServerPort: tomlConfiguration.Api.Port,
StorageDSN: tomlConfiguration.Storage.DSN,
StorageMaxIdle: tomlConfiguration.Storage.MaxIdle,
StorageMaxOpen: tomlConfiguration.Storage.MaxOpen,
InfluxUser: tomlConfiguration.Influx.User,
InfluxPassword: tomlConfiguration.Influx.Password,
InfluxHost: tomlConfiguration.Influx.Host,
InfluxDb: tomlConfiguration.Influx.Database,
LogFile: tomlConfiguration.Logging.File,
LogLevel: tomlConfiguration.Logging.Level,
NameServerBind: tomlConfiguration.NameServer.Bind,
NameServerPort: tomlConfiguration.NameServer.Port,
NameServerSecret: tomlConfiguration.NameServer.Secret,
LogQuery: tomlConfiguration.NameServer.LogQuery,
CompressQuery: tomlConfiguration.NameServer.CompressQuery,
}
return config, err
}
func parseJsonConfiguration(fileName string) (*Configuration, error) {
log.Info("Loading Config from " + fileName)
config := &Configuration{}
data, err := ioutil.ReadFile(fileName)
if err == nil {
err = json.Unmarshal(data, config)
if err != nil {
return nil, err
}
} else {
log.Error("Couldn't load configuration file: " + fileName)
panic(err)
}
return config, nil
}
func (self *Configuration) ApiServerListen() string {
if self.ApiServerPort <= 0 {
return ":5080"
}
return fmt.Sprintf("%s:%d", self.ApiServerBind, self.ApiServerPort)
}
func (self *Configuration) NameServerListen() string {
if self.NameServerPort <= 0 {
return ":5053"
}
return fmt.Sprintf("%s:%d", self.NameServerBind, self.NameServerPort)
}