使用pipline进行分层设计

laravel源码中有一个Illuminate\Pipeline\Pipeline类可以用来做一些特别的设计
例如对业务代码进行分层
下面是一个例子

class WelcomeController extends Controller
{
    public function index()
    {
        $pipes = [
            UserCreateInputTransformer::class,//输入参数转换
            UserCreateVerify::class,//验证逻辑
            UserCreate::class,//业务逻辑
            UserCreateOutputTransformer::class,//输出参数转换
        ];
        $result = App::make(Pipeline::class)
            ->send(['data' => Request::all()])
            ->through($pipes)
            ->then(function ($content) {
                return $content;
            });
        return $result;
    }