SpringCloud 2.x学习笔记：13、Spring Cloud Gateway+Hystrix简单例子（Greenwich版本）

<?xml version="1.0" encoding="UTF-8"?>
<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>
    <groupId>com.cntaiping.tpa</groupId>
    <artifactId>hystrix-gateway</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>hystrix-gateway</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>com.cntaiping.tpa</groupId>
        <artifactId>gateway</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

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

</project>

server.port= 7011

package com.cntaiping.tpa.hystrixgateway;

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.context.annotation.Bean;

@SpringBootApplication
public class HystrixGatewayApplication {

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

    @Bean
    public RouteLocator myRoutes(RouteLocatorBuilder builder) {
        return builder.routes()
                .route("path-route",p -> p
                        //断言为“/get”，凡是访问路由网关中的“/get”路径
                        .path("/get")
                        //在请求头中增加“Hello”—“World”键值对
                        .filters(f -> f.addRequestHeader("Hello", "World"))
                        //转发到http://httpbin.org
                        .uri("http://httpbin.org"))
                //使用hystrix
                .route("hystrix-route",p -> p
                        //当请求头中的Host为*.hystrix.com，进入此路由
                        .host("*.hystrix.com")
                        //设置Hystrix熔断，当请求（转发到http://httpbin.org）超时时，请求转发到Gateway中的“/fallback”
                        .filters(f -> f.hystrix(
                                config -> config.setName("cmd").setFallbackUri("forward:/fallback")))
                        //转发到http://httpbin.org
                        .uri("http://httpbin.org"))
                .build();
    }
}

package com.cntaiping.tpa.hystrixgateway.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import reactor.core.publisher.Mono;

@RestController
public class MessageController {

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

 curl --dump-header - --header Host:www.hystrix.com http://localhost:7011/delay/3