model

type Factory struct {
	Key               string `gorm:"primary_key"`
	Name              string
	Subject           string
	Description       string
	ContextDataSchema string
	ResultDataSchema  string
	Expiration        int64
	Language          string
	Definition        string
}

type Instance struct {
	Key         string `gorm:"primary_key"`
	State       int
	Name        string
	Subject     string
	Description string
	FactoryKey  string
	Observers   string // use `|` to split different observers
	ContextData string
	ResultData  string
	History     string
}

type ServiceRegistry struct {
	Key         string
	Name        string
	Description string
	Version     string
	Status      string
}