env

type Category string

type Context interface {
	AppName() string

	Query(c *Want) (*Have, error)

	GetPath(c *Want) afs.Path

	GetEnvironment() environment.Table

	GetProperties() properties.Table
}

type Have struct {
	Want *Want
	Path afs.Path
}

type Locator interface {
	Locate(q *Query, chain LocatorChain) error
}

type LocatorChain interface {
	Locate(q *Query) error
}

type LocatorRegistration struct {
	Locator  Locator
	Enabled  bool
	Priority int // 优先级越高，越靠近处理链条前端
}

type LocatorRegistry interface {
	Registrations() []*LocatorRegistration
}

type Query struct {
	Want *Want
	Have *Have
}

type Scope string

type Service interface {
	ForApp(appName string) Context
}

type User string

type Want struct {
	App      string // the simple-app-name
	Env      string // 环境变量名称
	Property string // 属性名称

	Category Category
	Scope    Scope
	User     User
}