Spring Cloud Gateway 구성
1. 프로젝트 생성
- New Project → Spring Initializer
2. Dependencies 추가
Gateway
Eureka Discovery Client
Spring Boot Actuator
Lombok
3. 설정
1) GatewayApplication.java 설정
@EnableEurekaClient 어노테이션을 추가한다.
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package com.example.gateway;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@EnableEurekaClient
@SpringBootApplication
public class GatewayApplication {
public static void main(String[] args) {
SpringApplication.run(GatewayApplication.class, args);
}
}
2) GlobalFilter.java 추가
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package com.example.gateway;
import lombok.Data;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Mono;
@Component
public class GlobalFilter extends AbstractGatewayFilterFactory<GlobalFilter.Config> {
private static final Logger logger = LogManager.getLogger(GlobalFilter.class);
public GlobalFilter() {
super(Config.class);
}
@Override
public GatewayFilter apply(Config config) {
return ((exchange, chain) -> {
logger.info("GlobalFilter baseMessage : " + config.getBaseMessage());
if (config.isPreLogger()) {
logger.info("GlobalFilter Start : " + exchange.getRequest());
}
return chain.filter(exchange).then(Mono.fromRunnable(() -> {
if (config.isPostLogger()) {
logger.info("GlobalFilter End : " + exchange.getResponse());
}
}));
});
}
@Data
public static class Config {
private String baseMessage;
private boolean preLogger;
private boolean postLogger;
}
}
3) BoardFilter.java 추가
BoardFilter 사용을 위해 추가한다. GlobalFilter와 같다.
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package com.example.gateway;
import lombok.Data;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Mono;
@Component
public class BoardFilter extends AbstractGatewayFilterFactory<BoardFilter.Config> {
private static final Logger logger = LogManager.getLogger(BoardFilter.class);
public BoardFilter() {
super(Config.class);
}
@Override
public GatewayFilter apply(Config config) {
return ((exchange, chain) -> {
logger.info("BoardFilter baseMessage : " + config.getBaseMessage());
if (config.isPreLogger()) {
logger.info("BoardFilter Start : " + exchange.getRequest());
}
return chain.filter(exchange).then(Mono.fromRunnable(() -> {
if (config.isPostLogger()) {
logger.info("BoardFilter End : " + exchange.getResponse());
}
}));
});
}
@Data
public static class Config {
private String baseMessage;
private boolean preLogger;
private boolean postLogger;
}
}
4) application.yml 설정
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server:
port: 8080
eureka:
client:
fetch-registry: false
register-with-eureka: false
service-url:
defaultZone: http://localhost:8761/eureka
# Gateway Route 노출 설정
management:
endpoints:
web:
exposure:
include:
- "gateway"
endpoint:
gateway:
enabled: true
spring:
application:
name: gateway-service
cloud:
gateway:
default-filters:
- name: GlobalFilter # GlobalFilter 설정
args:
baseMessage: Spring Cloud Gateway GlobalFilter
preLogger: true
postLogger: true
routes:
- id: board-service # board-rest-api 설정
uri: http://localhost:8081/
predicates:
- Path=/board/**
filters:
- name: BoardFilter # BoardFilter 설정
args:
baseMessage: Spring Cloud Gateway BoardFilter
preLogger: true
postLogger: true
4. 실행
IntelliJ 기준으로 Eureka, Gateway, Board 모듈을 import 하고, 각 모듈을 실행한다.
Eureka 포트: 8761
Gateway 포트: 8080
Board 포트: 8081
http://localhost:8080/board board 서비스를 호출한다.
[출처 및 참고]
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