Feign Hystrix熔断

<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.tszr.consumer</groupId>
    <artifactId>mango-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mango-consumer</name>
    <description>mango-consumer</description>
    
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>
    
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <swagger.version>2.9.2</swagger.version>
        <mybatis.spring.version>1.3.2</mybatis.spring.version>
        <spring.boot.admin.version>2.0.3</spring.boot.admin.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>
    
    <dependencies>
        <!-- web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- swagger -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <!--spring-boot-admin-->
           <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>${spring.boot.admin.version}</version>
        </dependency>
        <!--consul-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>
        <!--feign -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <!--test-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
            
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

server:
  port: 8005
spring:
  application:
    name: mango-consumer
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        serviceName: ${spring.application.name}    # 注册到consul的服务名称
  boot:
    admin:
      client:
        url: "http://localhost:8003"
# 开放健康检查接口
management:
  endpoints:
    web:
      exposure:
        include: "*"
  endpoint:
    health:
      show-details: ALWAYS
      
#开启熔断器
feign:
  hystrix:
    enabled: true

package com.tszr.mango.consumer.service;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

import com.tszr.mango.consumer.controller.MangoProducerHystrix;

@FeignClient(name="mango-producer", fallback = MangoProducerHystrix.class)
public interface MangoProducerService {

    @RequestMapping("/hello")
    public String hello();
}

package com.tszr.mango.consumer.controller;

import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;

import com.tszr.mango.consumer.service.MangoProducerService;

@Component
public class MangoProducerHystrix implements MangoProducerService{

    @RequestMapping("/hello")
    public String hello() {
        return "sorry, hello service call failed.";
    }
}

package com.tszr.mango.consumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@EnableFeignClients 
@EnableDiscoveryClient
@SpringBootApplication
public class MangoConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(MangoConsumerApplication.class, args);
    }
    
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}