AlgoCraft Backend Flow

Overview

This system designed to handle the Problem creation, code submission, evaluations and notifies the execution status.

System Flow

1. Client Sends Request: A client submits a code for evaluation.
2. Submission Service:
   • Receives the submission request.
   • Fetches problem details from the Problem Admin Service.
   • Stores submission details in the database.
   • Enqueues the submission payload in a Redis queue.
   • Sends a confirmation response to the client.
3. Evaluator Service:
   • Consumes the submission from the Redis queue.
   • Evaluates the code based on test cases.
   • Enqueues the evaluation result in another Redis queue.
4. Submission Service:
   • Consumes the evaluation result.
   • Updates submission details in the database.
   • Notifies the WebSocket service about the evaluation status.
5. WebSocket Service:
   • Sends real-time updates to the client about the code execution status.

Components

• Problem Admin Service: Manages problem details.
• Submission Service: Handles submission creation, queuing, and updates.
• Evaluator Service: Evaluates submitted code.
• WebSocket Service: Provides real-time updates.

Technologies

• Problem Admin Service: JavaScript, ExpressJS, MongoDB
• Submission Service: JavaScript, Fastify, Redis(queue), MongoDB
• Evaluator Service: TypeScript, ExpressJS, Redis(queue)
• WebSocket: socket.io, Redis(cache)