Kevin Powell - Community•3y ago

API layered architecture

Hi, I'm trying to apply the concepts of a layered architecture on a file upload API. Currently I have a folder structure that resembles this:

src
├── api
│   └── files
│       ├── file.controller.ts
│       ├── file.repository.ts
│       ├── file.router.ts
│       └── file.service.ts
└── index.ts

src
├── api
│   └── files
│       ├── file.controller.ts
│       ├── file.repository.ts
│       ├── file.router.ts
│       └── file.service.ts
└── index.ts

Inside file.repository.ts will be all functionality related to talking to the database. However, I intend to save the uploaded files on the server instead of using a 3rd party service for this, mainly for practice purposes. The question then is, where would this functionality (reading from and writing to disk) live? Inside services? Repository? Or should I create a whole new domain (maybe called io or something) just for this? Cheers!

2 Replies

Unknown User•3y ago

Message Not Public

JoaoOP•3y ago

Thanks for the suggestion, I've finally decided to do something very close to that. I decoupled the repositories from all domains, so that they are accessible throughout the app. I'll have one repository to talk to the database and store information about the file: location, size, etc., and another for the file system responsible for actually reading/writing as needed. Then a services folder where each service represents a unique action, or use case: create a file, delete it, etc, managing it's own controller, validation, etc.

src
├── entities
│   └── file.entity.ts
├── index.ts
├── repositories
│   ├── file.repository.ts
│   └── fs.repository.ts
└── services
    └── createFile
    │   ├── createFile.controller.ts
    │   ├── createFile.dto.ts
    │   ├── createFile.service.ts
    │   ├── createFile.validators.ts
    │   └── index.ts
    ├── readFile
    ├── updateFile
    └── ...

src
├── entities
│   └── file.entity.ts
├── index.ts
├── repositories
│   ├── file.repository.ts
│   └── fs.repository.ts
└── services
    └── createFile
    │   ├── createFile.controller.ts
    │   ├── createFile.dto.ts
    │   ├── createFile.service.ts
    │   ├── createFile.validators.ts
    │   └── index.ts
    ├── readFile
    ├── updateFile
    └── ...

It seems to be coming together rather nicely this way, but I appreciate any feedback on this

Gaming

Programming

API layered architecture