gabrielye / online-judge-system

This is a online judge system used to practice algorithm problems. Users could work in the same editor simultaneously.

Online-Judge-System

This is a online judge system used to practice algorithm problems. Users could work in the same editor simultaneously.

Introduction to the system:

• Used Angular2+ and Bootstrap for front-end.
• Designed RESTful APIs. Utilized NodeJS + ExpressJS to create a efficient back-end server.
• Deployed MongoDB as a database to store the problems list and code history.
• Utilized Redis as a cache system to sotre users' uncompleted code.
• Used socket.io to implement real-time collaborative editing. Several users could work on the same problem simultaneously.
• Deployed Docker as a executor to compile and run users' code. Also the execution is isolated by Docker for security consideration.
• Deployed several executors to improve system's performace.
• Configured Nginx as load balancer to improve the distribution of workloads.