Golang으로 CleanArchitecture의 usecase부를 설치해보도록 하겠습니다.

trait InputPort[I, O] {
    def run(param: I, outputPort: OutputPort[O]): Unit = outputPort.run(doRun(param))
    protected def doRun(param: I): UseCaseResult[O]
}

trait OutputPort[T] {
    def run(usecaseResult: UseCaseResult[T]): Unit
}

type Errors = List[String]
type UseCaseResult[O] = Either[Errors, O]

package usecases

type InputPort struct {
    Interactor Interactor
}

func (inputPort InputPort) Run(param interface{}, outputPort OutputPort) {
    outputPort.Run(inputPort.Interactor.Run(param))
}

type Interactor interface {
    Run(param interface{}) UseCaseResult
}

type UseCaseResult struct {
    Value interface{}
    Error error
}

type OutputPort interface {
    Run(result UseCaseResult)
}

type InputPort interface {
    Run(param interface{}) UseCaseResult
}

type OutputPort interface {
    Run(result UseCaseResult)
}

func Run(param interface{}, inputPort InputPort, outputPort OutputPort) {
    outputPort.Run(inputPort.Run(param))
}