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Building the layered server application achieve...

OKUNOKENTARO
December 01, 2019

Building the layered server application achieved by InversifyJS

The slide that used when I talked in JSConf JP.

OKUNOKENTARO

December 01, 2019
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  1. PS

  2. function makeUserId(): UserId { return new UserId(uuid()); } function makeUserIdMock(mockValue:

    string): UserId { return new UserId(mockValue); } class UserId { constructor(readonly value: string) {} } #FUUFS
  3. class UsersGetMediator { async handle(req: Request, res: Response) { const

    repo = new UsersRepository( new DatabaseProvider(), ); const users = await repo.getAll(); // Processing to send response } } )NNN
  4. class Application { private router: Router; constructor() { this.router =

    new Router( new UsersGetMediator( new UsersRepository( new DatabaseProvider(), ) ) ) } } :PVLOPX
  5. class Application { private router: Router; constructor() { this.router =

    new Router( new UsersGetMediator( new UsersRepository( new DatabaseProvider(), ) ) ) } } )!%0,&/
  6. import { injectable } from 'inversify'; @injectable() export class Application

    { constructor( private readonly auth: AuthService, private readonly router: Router, private readonly express: ExpressProvider, ) {} main() { this.auth.prepare(); this.router.prepare(); this.express.listen(); } } *OKFDUBCMFEFDPSBUPS
  7. @injectable() export class UsersGetMediator { constructor( private readonly auth: AuthService,

    private readonly permissionVerifier: PermissionVerifier, private readonly errorHandler: ErrorHandler, private readonly usersRepo: UsersRepository, ) {} async handle(req: Request, res: Response) { if (!(await this.auth.isAuthenticated(req))) { return this.errorHandler.unauthorized(res); } if (!(await this.permissionVerifier.canReadUsers(req.user.id))) { return this.errorHandler.forbidden(res); } const users = await this.usersRepo.getAll(); const body: UsersGetResponse = { users: users.serialize(), }; res.send(body).end(); } }
  8. +4$POG+1 Express Http Handler (Router) Google Cloud SQL Mediator Repository

    Database Provider Reader Writer Http Request (Not TS) Domain model Data access object Knex.js ORM Raw SQL Query (Not TS)
  9. +4$POG+1 Express Http Handler (Router) Google Cloud SQL Mediator Repository

    Database Provider Reader Writer Serialized JSON (Not TS) Domain model Data transfer object Results as JSON (Not TS)