Spring Boot Tutorial 0/110 lessons ~6 min read Lesson 69“Production-grade backends”

API Gateway (Microservices)

In microservices, the gateway is even more critical: clients should talk to one URL while you reorganise services freely behind it.

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Focus

2 guided sections

Practice signal

Examples included

Career prep

Foundation builder

Introduction

In microservices, the gateway is even more critical: clients should talk to one URL while you reorganise services freely behind it. Spring Cloud Gateway plus discovery is the JVM-native combo.

Informative example

bash

spring:
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true                # auto-route by service name
          lower-case-service-id: true
      routes:
        - id: orders
          uri: lb://orders-service     # discovered via Eureka/K8s
          predicates: [ Path=/orders/** ]
          filters:
            - name: CircuitBreaker
              args: { name: ordersCB, fallbackUri: forward:/fallback/orders }
            - RewritePath=/orders/(?<seg>.*),/api/v1/orders/$\{seg}

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