assignment.md

Course program module (for RS School students)

REST service: Logging & Error Handling

Description

Your task is to implement logging functionality to the already existing REST service.

Technical requirements

• Only @nestjs/common and @nestjs-core Nest.js modules can be used for the logger and error handling feature assignment, other Nest.js modules are prohibited
• Use 22.x.x version (22.9.0 or upper) of Node.js

Implementation details

1. Implement custom LoggingService which will be used for logging and provided via dependency injection
2. Incoming requests to service (at least url, query parameters, body) and response with status code should be logged by LoggingService.
3. Implement custom Exception Filter and use it for handling errors during request processing. In case of unexpected error response with HTTP code 500 (Internal Server Error) and standard message should be sent
4. LoggingService should log all errors
5. Add listener and logging to uncaughtException event
6. Add listener and logging to unhandledRejection event
7. Writing to process.stdout or to a file both can be used for logging
8. There should be multiple logging levels and logging level should be stored in environment variable
9. Log file rotation should be setup with file size (kB) parameter.