springcloud gateway(hystrix filter)

参考

https://blog.csdn.net/forezp/article/details/83792388

1.依赖pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.guo</groupId>
    <artifactId>guo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>guo-gateway</artifactId>

  <dependencies>
  	<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
  	<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
	</dependency>
  </dependencies>
</project>

　　

2.配置application.yml

server:
  port: 8081

spring:
  application:
    name: guo-gateway
  cloud:
    gateway:
      discovery:
        locator:
          enabled: false
          lowerCaseServiceId: true

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/

logging:
  level:
    org.springframework.cloud.gateway: debug

　　

3.启动配置

package com.guo.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
@EnableEurekaClient
public class Application {

	public static void main(String[] args) {
        SpringApplication.run( Application.class, args );
    }

	@Bean
    public RouteLocator myRoutes(RouteLocatorBuilder builder) {
        String httpUri = "http://localhost:8762/hi";
        return builder.routes()
            .route(p -> p
                .path("/demo")
                .filters(f -> f.addRequestHeader("Hello", "World"))
                .uri(httpUri))
            .build();
    }
}

　　

4.启动演示

启动eureka-server eureka-client gateway

访问gateway接口 http://localhost:8081/demo?name=zs 会自动转发到 http://localhost:8762/hi

5.添加熔断器

pom.xml

<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    </dependency>

　　添加过滤器

　　

package com.guo.gateway;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import reactor.core.publisher.Mono;

@SpringBootApplication
@EnableEurekaClient
@RestController
public class Application {

	public static void main(String[] args) {
        SpringApplication.run( Application.class, args );
    }

	@Bean
    public RouteLocator myRoutes(RouteLocatorBuilder builder) {
        String httpUri = "http://localhost:8762/hi";
        return builder.routes()
            .route(p -> p
                .path("/demo")
                .filters(f -> f.addRequestHeader("Hello", "World"))
                .uri(httpUri))
            .route(p -> p
            		.path("/hystrix")
                .filters(f -> f
                    .hystrix(config -> config
                        .setName("mycmd")
                        .setFallbackUri("forward:/fallback")))
                .uri(httpUri))
            .build();
    }

  @RequestMapping("/fallback")
  public Mono<String> fallback() {
      return Mono.just("fallback");
  }

}

　　

停掉 http://localhost:8762/hi 服务，访问熔断成功。