Event Seating API - Backend

High-performance Express.js API with advanced caching and rate limiting.

Architecture

• LRU Cache with 60s TTL and automatic cleanup
• Rate Limiting with burst handling (10/min, 5/10s burst)
• Request Queue for managing concurrent DB operations
• TypeScript strict mode for type safety

Features

• LRU cache with statistics tracking
• Sophisticated rate limiting (per-minute + burst)
• Asynchronous request queue
• Duplicate request deduplication
• Manual cache management
• Performance metrics tracking

Setup

pnpm install
pnpm dev

API Endpoints

• GET /users/:id - Get user by ID
• POST /users - Create new user
• GET /users/cache/status - Cache statistics
• DELETE /users/cache - Clear cache

Caching Strategy

• LRU eviction when max size reached
• 60-second TTL per entry
• Background cleanup every 30s
• Concurrent request deduplication

Rate Limiting

• 10 requests/minute per IP
• 5 requests/10 seconds burst capacity
• Returns 429 with retry-after header

Testing

Find the postman collection (docs/postman_collection.json). Meanwhile, here are working curl commands you can run locally. Make sure the server is running (default: http://localhost:3000).

# Get user by ID
curl http://localhost:3000/users/1

# Create new user
curl -X POST http://localhost:3000/users \
	-H "Content-Type: application/json" \
	-d '{"name":"Bob Wilson","email":"bob@example.com"}'

# Check cache status
curl http://localhost:3000/users/cache/status

# Clear cache
curl -X DELETE http://localhost:3000/users/cache