# Golang DI Notes

[](https://cutt.ly/bndHJbJ)
- https://cutt.ly/bndHJbJ

Class2 / Struct

- DoA
- DoB
- DoC

DoAer -> interface
DoBer
DoCer

DoAImpl - class/struct

Method(inf)
Method(...) < must be restricted to 3
Method(Class2er)

Class2 / Struct

- DoA
- DoB
- DoC

(Class2er) inf

- DoAer
- DoBer
- DoCer

- DoAImpl -> DoAer

DI -> (DoAer <-> DoAImpl  [Options IsOnetime])

NewClass2(DoAImpl,...)
Di.Create<Class2>()


Class2 / Struct --> how to refactor

field DoAer, DoBer, DoCer

NewClass2( DoAer, DoBer ) {
   DoAer = DoAer,
..
}


- DoA -> DoAer.DoA() // delegation
- DoB -> Dober.Dob() // delegation
- DoC
....

// Go feature

// vars.go
var (
 doAimpl = NewDoAImpl()
 doBimpl = NewDoAImpl()
   ..
)

Class2 / Struct --> how to refactor
{
     
}

NewClass2() {
    


- DoA -> doAimpl.DoA() // delegation
- DoB -> doBimpl .Dob() // delegation
- DoC