<aside> 📚 📁 Category: Microservices

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Overview

API Gateway is the single entry point for all client requests. It handles routing, authentication, rate limiting, and aggregation, simplifying client interactions with microservices.

<aside> ℹ️ Why It Matters: Understanding API Gateway is essential for building robust, scalable, and secure modern applications.

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Key Concepts

• [x] Request Routing - Direct to backend services
• [x] API Composition - Aggregate multiple APIs
• [x] Authentication & Authorization - Centralized security
• [x] Rate Limiting - Protect from overload
• [x] Caching - Improve performance
• [x] Protocol Translation - REST, gRPC, WebSocket
• [x] Load Balancing - Distribute traffic
• [x] Circuit Breaker - Handle failures

Common Use Cases

<aside> 💡 Where to Apply API Gateway

                        Mobile app backends
                        Web application APIs
                        Third-party integrations
                        Backend for Frontend (BFF)
                        API versioning
                        Multi-tenant applications

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Best Practices

• [x] Keep gateway logic simple
• [x] Implement proper timeout handling
• [x] Use caching strategically
• [x] Monitor gateway performance