当多个结构在golang中具有多个常用功能时，最佳实践是什么？

Question

I have 3 classes, which have several operation steps implemented in different functions. For example,

func ExternalAPI1() error
func ExternalAPI2(s string)
func internalProcess1() error
func internalProcess2(s []string) error 
func internalProcess3(d int) error

For the internalProcessx, they're internal functions which may not be invoked by other classes, but these functions do have identical signatures. Should I generate an interface for them with only ExternalAPI1 and ExternalAPI2 included? or should I include all these 5 functions in the interface?

Answer 1

An interface describes the methods required to perform a certain action. In your case, this is definitely the following:

type API interface {
    ExternalAPI1() error
    ExternalAPI2(s string)
}

However, do note that this does not limit the use of non-exported methods when using your struct (not class) directly from the same package.