CodeArena

## Prerequisites

Install the following:

- Docker Desktop

- Node.js (v18+ recommended)

- MongoDB

- Git

Make sure Docker Desktop is running before starting the project.

## Step 1: Pull Required Docker Images

```bash

docker pull eclipse-temurin:17-jdk

docker pull python:3.11

docker pull gcc:latest

docker pull redis:latest

## Step 2: Create Long-Running Docker Containers

Create the following containers. They are configured with `sleep infinity` so they remain running and can execute code submissions without needing to recreate the container for every request.

### Java

```bash

docker run -dit --name java eclipse-temurin:17-jdk sleep infinity

### Python

```bash

docker run -dit --name python python:3.11 sleep infinity

### C

```bash

docker run -dit --name c gcc:latest sleep infinity

### C++

```bash

docker run -dit --name cpp gcc:latest sleep infinity

### Redis

```bash

docker run -dit --name redis-container -p 6379:6379 redis:latest

## Step 3: Create Working Directory Inside Containers

Run these commands once:

```bash

docker exec java mkdir -p /usr/src/app

docker exec python mkdir -p /usr/src/app

docker exec c mkdir -p /usr/src/app

docker exec cpp mkdir -p /usr/src/app

## Step 4: Start Existing Containers

If the containers already exist but are stopped:

```bash

docker start java python c cpp redis-container

Verify that they are running:

```bash

docker ps

## Step 5: Install Backend Dependencies

cd server

npm install

## Step 6: Start the Main Server

cd server

node server.js

depending on your project configuration.

## Step 7: Start the Worker Listener

Open a new terminal:

cd server/src/worker_server

node socker_list.js

After starting the application:

• Register or log in to your account.
• Create or join a coding competition room.
• Select a programming language (Java, Python, C, or C++).
• Solve the assigned coding problem within the given time limit.
• Submit your solution.
• The submission is securely executed inside the corresponding Docker container.
• The system compiles, executes, and evaluates the code against the test cases.
• The execution result and verdict are displayed to the participant. 

Hardware Requirements

Minimum

• Dual-Core Processor
• 4 GB RAM
• 10 GB Free Disk Space

Recommended

• Intel Core i5 / Ryzen 5 or above
• 8 GB RAM or higher
• 20 GB Free Disk Space
• SSD Storage