config

package
v1.0.1 Latest Latest
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 Go to latest Published: Feb 4, 2022 License: LGPL-3.0 Imports: 18 Imported by: 0

Documentation

Overview

Package config is used to parse config. Usage: 

import "github.com/W3-Engineers-Ltd/Radiant/core/config"

Examples. 

cnf, err := config.NewConfig("ini", "config.conf")

cnf APIS:

cnf.Set(key, val string) error
cnf.String(key string) string
cnf.Strings(key string) []string
cnf.Int(key string) (int, error)
cnf.Int64(key string) (int64, error)
cnf.Bool(key string) (bool, error)
cnf.Float(key string) (float64, error)
cnf.DefaultString(key string, defaultVal string) string
cnf.DefaultStrings(key string, defaultVal []string) []string
cnf.DefaultInt(key string, defaultVal int) int
cnf.DefaultInt64(key string, defaultVal int64) int64
cnf.DefaultBool(key string, defaultVal bool) bool
cnf.DefaultFloat(key string, defaultVal float64) float64
cnf.DIY(key string) (interface{}, error)
cnf.GetSection(section string) (map[string]string, error)
cnf.SaveConfigFile(filename string) error

More docs http://radiant.me/docs/module/config.md

Index

Constants

This section is empty.

Variables

View Source 
var (
	KeyNotFoundError      = errors.New("the key is not found")
	InvalidValueTypeError = errors.New("the value is not expected type")
)

now not all implementation return those error codes

Functions

func Bool 

func Bool(key string) (bool, error)

func DIY 

func DIY(key string) (interface{}, error)

DIY return the original value

func DefaultBool 

func DefaultBool(key string, defaultVal bool) bool

func DefaultFloat 

func DefaultFloat(key string, defaultVal float64) float64

func DefaultInt 

func DefaultInt(key string, defaultVal int) int

func DefaultInt64 

func DefaultInt64(key string, defaultVal int64) int64

func DefaultString 

func DefaultString(key string, defaultVal string) string

support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.

func DefaultStrings 

func DefaultStrings(key string, defaultVal []string) []string

get string slice

func ExpandValueEnv 

func ExpandValueEnv(value string) (realValue string)

ExpandValueEnv returns value of convert with environment variable.

Return environment variable if value start with "${" and end with "}". Return default value if environment variable is empty or not exist.

It accept value formats "${env}" , "${env||}}" , "${env||defaultValue}" , "defaultvalue". Examples: 

v1 := config.ExpandValueEnv("${GOPATH}")			// return the GOPATH environment variable.
v2 := config.ExpandValueEnv("${GOAsta||/usr/local/go}")	// return the default value "/usr/local/go/".
v3 := config.ExpandValueEnv("Astaxie")				// return the value "Astaxie".

func ExpandValueEnvForMap 

func ExpandValueEnvForMap(m map[string]interface{}) map[string]interface{}

ExpandValueEnvForMap convert all string value with environment variable.

func Float 

func Float(key string) (float64, error)

func GetSection 

func GetSection(section string) (map[string]string, error)

func InitGlobalInstance 

func InitGlobalInstance(name string, cfg string) error

InitGlobalInstance will ini the global instance If you want to use specific implementation, don't forget to import it. e.g. _ import "github.com/W3-Engineers-Ltd/Radiant/core/config/etcd" err := InitGlobalInstance("etcd", "someconfig")

func Int 

func Int(key string) (int, error)

func Int64 

func Int64(key string) (int64, error)

func OnChange 

func OnChange(key string, fn func(value string))

func ParseBool 

func ParseBool(val interface{}) (value bool, err error)

ParseBool returns the boolean value represented by the string.

It accepts 1, 1.0, t, T, TRUE, true, True, YES, yes, Yes,Y, y, ON, on, On, 0, 0.0, f, F, FALSE, false, False, NO, no, No, N,n, OFF, off, Off. Any other value returns an error.

func Register 

func Register(name string, adapter Config)

Register makes a config adapter available by the adapter name. If Register is called twice with the same name or if driver is nil, it panics.

func SaveConfigFile 

func SaveConfigFile(filename string) error

func Set 

func Set(key, val string) error

support section::key type in given key when using ini type.

func String 

func String(key string) (string, error)

support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.

func Strings 

func Strings(key string) ([]string, error)

get string slice

func ToString 

func ToString(x interface{}) string

ToString converts values of any type to string.

func Unmarshaler 

func Unmarshaler(prefix string, obj interface{}, opt ...DecodeOption) error

Types

type BaseConfiger 

type BaseConfiger struct {
	// contains filtered or unexported fields
}

func NewBaseConfiger 

func NewBaseConfiger(reader func(ctx context.Context, key string) (string, error)) BaseConfiger

func (*BaseConfiger) Bool 

func (c *BaseConfiger) Bool(key string) (bool, error)

func (*BaseConfiger) DefaultBool 

func (c *BaseConfiger) DefaultBool(key string, defaultVal bool) bool

func (*BaseConfiger) DefaultFloat 

func (c *BaseConfiger) DefaultFloat(key string, defaultVal float64) float64

func (*BaseConfiger) DefaultInt 

func (c *BaseConfiger) DefaultInt(key string, defaultVal int) int

func (*BaseConfiger) DefaultInt64 

func (c *BaseConfiger) DefaultInt64(key string, defaultVal int64) int64

func (*BaseConfiger) DefaultString 

func (c *BaseConfiger) DefaultString(key string, defaultVal string) string

DefaultString returns the string value for a given key. if err != nil or value is empty return defaultval

func (*BaseConfiger) DefaultStrings 

func (c *BaseConfiger) DefaultStrings(key string, defaultVal []string) []string

DefaultStrings returns the []string value for a given key. if err != nil return defaultval

func (*BaseConfiger) Float 

func (c *BaseConfiger) Float(key string) (float64, error)

func (*BaseConfiger) Int 

func (c *BaseConfiger) Int(key string) (int, error)

func (*BaseConfiger) Int64 

func (c *BaseConfiger) Int64(key string) (int64, error)

func (*BaseConfiger) OnChange 

func (*BaseConfiger) OnChange(_ string, _ func(value string))

func (*BaseConfiger) String 

func (c *BaseConfiger) String(key string) (string, error)

func (*BaseConfiger) Strings 

func (c *BaseConfiger) Strings(key string) ([]string, error)

Strings returns the []string value for a given key. Return nil if config value does not exist or is empty.

func (*BaseConfiger) Sub 

func (*BaseConfiger) Sub(string) (Configer, error)

type Config 

type Config interface {
	Parse(key string) (Configer, error)
	ParseData(data []byte) (Configer, error)
}

Config is the adapter interface for parsing config file to get raw data to Configer.

type Configer 

type Configer interface {
	// support section::key type in given key when using ini type.
	Set(key, val string) error

	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
	String(key string) (string, error)
	// get string slice
	Strings(key string) ([]string, error)
	Int(key string) (int, error)
	Int64(key string) (int64, error)
	Bool(key string) (bool, error)
	Float(key string) (float64, error)
	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
	DefaultString(key string, defaultVal string) string
	// get string slice
	DefaultStrings(key string, defaultVal []string) []string
	DefaultInt(key string, defaultVal int) int
	DefaultInt64(key string, defaultVal int64) int64
	DefaultBool(key string, defaultVal bool) bool
	DefaultFloat(key string, defaultVal float64) float64

	// DIY return the original value
	DIY(key string) (interface{}, error)

	GetSection(section string) (map[string]string, error)

	Unmarshaler(prefix string, obj interface{}, opt ...DecodeOption) error
	Sub(key string) (Configer, error)
	OnChange(key string, fn func(value string))
	SaveConfigFile(filename string) error
}

Configer defines how to get and set value from configuration raw data.

func NewConfig 

func NewConfig(adapterName, filename string) (Configer, error)

NewConfig adapterName is ini/json/xml/yaml. filename is the config file path.

func NewConfigData 

func NewConfigData(adapterName string, data []byte) (Configer, error)

NewConfigData adapterName is ini/json/xml/yaml. data is the config data.

func NewFakeConfig 

func NewFakeConfig() Configer

NewFakeConfig return a fake Configer

func Sub 

func Sub(key string) (Configer, error)

type DecodeOption 

type DecodeOption func(options decodeOptions)

type IniConfig 

type IniConfig struct{}

IniConfig implements Config to parse ini file.

func (*IniConfig) Parse 

func (ini *IniConfig) Parse(name string) (Configer, error)

Parse creates a new Config and parses the file configuration from the named file.

func (*IniConfig) ParseData 

func (ini *IniConfig) ParseData(data []byte) (Configer, error)

ParseData parse ini the data When include other.conf,other.conf is either absolute directory or under radiant in default temporary directory(/tmp/radiant[-username]).

type IniConfigContainer 

type IniConfigContainer struct {
	BaseConfiger

	sync.RWMutex
	// contains filtered or unexported fields
}

IniConfigContainer is a config which represents the ini configuration. When set and get value, support key as section:name type.

func (*IniConfigContainer) Bool 

func (c *IniConfigContainer) Bool(key string) (bool, error)

Bool returns the boolean value for a given key.

func (*IniConfigContainer) DIY 

func (c *IniConfigContainer) DIY(key string) (v interface{}, err error)

DIY returns the raw value by a given key.

func (*IniConfigContainer) DefaultBool 

func (c *IniConfigContainer) DefaultBool(key string, defaultVal bool) bool

DefaultBool returns the boolean value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) DefaultFloat 

func (c *IniConfigContainer) DefaultFloat(key string, defaultVal float64) float64

DefaultFloat returns the float64 value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) DefaultInt 

func (c *IniConfigContainer) DefaultInt(key string, defaultVal int) int

DefaultInt returns the integer value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) DefaultInt64 

func (c *IniConfigContainer) DefaultInt64(key string, defaultVal int64) int64

DefaultInt64 returns the int64 value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) DefaultString 

func (c *IniConfigContainer) DefaultString(key string, defaultVal string) string

DefaultString returns the string value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) DefaultStrings 

func (c *IniConfigContainer) DefaultStrings(key string, defaultVal []string) []string

DefaultStrings returns the []string value for a given key. if err != nil return defaultVal

func (*IniConfigContainer) Float 

func (c *IniConfigContainer) Float(key string) (float64, error)

Float returns the float value for a given key.

func (*IniConfigContainer) GetSection 

func (c *IniConfigContainer) GetSection(section string) (map[string]string, error)

GetSection returns map for the given section

func (*IniConfigContainer) Int 

func (c *IniConfigContainer) Int(key string) (int, error)

Int returns the integer value for a given key.

func (*IniConfigContainer) Int64 

func (c *IniConfigContainer) Int64(key string) (int64, error)

Int64 returns the int64 value for a given key.

func (*IniConfigContainer) SaveConfigFile 

func (c *IniConfigContainer) SaveConfigFile(filename string) (err error)

SaveConfigFile save the config into file.

BUG(env): The environment variable config item will be saved with real value in SaveConfigFile Function.

func (*IniConfigContainer) Set 

func (c *IniConfigContainer) Set(key, val string) error

Set writes a new value for key. if write to one section, the key need be "section::key". if the section is not existed, it panics.

func (*IniConfigContainer) String 

func (c *IniConfigContainer) String(key string) (string, error)

String returns the string value for a given key.

func (*IniConfigContainer) Strings 

func (c *IniConfigContainer) Strings(key string) ([]string, error)

Strings returns the []string value for a given key. Return nil if config value does not exist or is empty.

func (*IniConfigContainer) Unmarshaler 

func (c *IniConfigContainer) Unmarshaler(prefix string, obj interface{}, opt ...DecodeOption) error

Notes

Bugs

  • The environment variable config item will be saved with real value in SaveConfigFile Function.

Source Files

View all Source files

Directories

Path Synopsis
Package env is used to parse environment.
 Package env is used to parse environment.
Package xml for config provider.
 Package xml for config provider.
Package yaml for config provider Usage: import( _ "github.com/W3-Engineers-Ltd/Radiant/core/config/yaml" "github.com/W3-Engineers-Ltd/Radiant/core/config" ) cnf, err := config.NewConfig("yaml", "config.yaml") More docs http://radiant.me/docs/module/config.md
 Package yaml for config provider Usage: import( _ "github.com/W3-Engineers-Ltd/Radiant/core/config/yaml" "github.com/W3-Engineers-Ltd/Radiant/core/config" ) cnf, err := config.NewConfig("yaml", "config.yaml") More docs http://radiant.me/docs/module/config.md

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