workers

CodeSM — Workers

Background workers for CodeSM using Bull and Redis. Jobs run user code (C++ flow in runCode.js) and return output to the queue consumer.

Prerequisites

• Node.js 18+
• Redis reachable at REDIS_URL (default redis://localhost:6379)
• Same queue name and Redis as the backend Bull configuration (job-queue)

Install

cd workers
npm install

Environment

Variable	Purpose
REDIS_URL	Redis connection string (default redis://localhost:6379)
AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_BUCKET_NAME	Used by services/aws.service.js when pulling problem assets from S3

Run

npm start

This runs node src/worker.js, which registers a Bull processor on the job-queue queue.

Docker

• Dockerfile builds a minimal image for compiling and running C++ user code (g++, input.txt).
• python/Dockerfile exists for Python-oriented execution if you extend the worker similarly.

Run these images as needed for your sandbox; the Node worker orchestrates jobs and may spawn containers depending on runCode.js behavior.

Backend coordination

The API in ../backend enqueues work onto the same Bull queue. Start Redis, then the backend, then this worker process, for end-to-end code execution.