Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 60“Production-grade backends”

API Gateway

An API Gateway is a single front door for all your microservices: routing, auth, rate-limiting, request rewriting, observability.

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Focus

2 guided sections

Practice signal

Examples included

Career prep

Foundation builder

Introduction

An API Gateway is a single front door for all your microservices: routing, auth, rate-limiting, request rewriting, observability. Spring Cloud Gateway is the JVM-native option; Kong / AWS API Gateway are popular alternatives.

Informative example

bash

# Spring Cloud Gateway routes
spring:
  cloud:
    gateway:
      routes:
        - id: orders
          uri: lb://orders-service
          predicates: [ Path=/api/v1/orders/** ]
          filters:
            - StripPrefix=2
            - name: RequestRateLimiter
              args:
                redis-rate-limiter.replenishRate: 50
                redis-rate-limiter.burstCapacity: 100
        - id: catalog
          uri: lb://catalog-service
          predicates: [ Path=/api/v1/products/** ]

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