springcloud10---feign-with-hystrix_factory
package com.itmuch.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.feign.EnableFeignClients; @SpringBootApplication @EnableEurekaClient @EnableFeignClients public class ConsumerMovieFeignApplication { public static void main(String[] args) { SpringApplication.run(ConsumerMovieFeignApplication.class, args); } }
package com.itmuch.cloud.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import com.itmuch.cloud.entity.User; import com.itmuch.cloud.feign.UserFeignClient; @RestController public class MovieController { @Autowired private UserFeignClient userFeignClient; @GetMapping("/movie/{id}") public User findById(@PathVariable Long id) { return this.userFeignClient.findById(id); } }
package com.itmuch.cloud.feign; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; import com.itmuch.cloud.entity.User; import feign.hystrix.FallbackFactory; @Component public class HystrixClientFactory implements FallbackFactory<UserFeignClient> { private static final Logger LOGGER = LoggerFactory.getLogger(HystrixClientFactory.class); @Override public UserFeignClient create(Throwable cause) { HystrixClientFactory.LOGGER.info("fallback; reason was: {}", cause.getMessage()); return new UserFeignClientWithFactory() { @Override public User findById(Long id) { User user = new User(); user.setId(-1L); return user; } }; } }
package com.itmuch.cloud.feign; import org.springframework.stereotype.Component; import com.itmuch.cloud.entity.User; @Component public class HystrixClientFallback implements UserFeignClient { @Override public User findById(Long id) { User user = new User(); user.setId(0L); return user; } }
package com.itmuch.cloud.feign; import org.springframework.cloud.netflix.feign.FeignClient; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import com.itmuch.cloud.entity.User; @FeignClient(name = "microservice-provider-user", /*fallback = HystrixClientFallback.class, */fallbackFactory = HystrixClientFactory.class) public interface UserFeignClient {//请求microservice-provider-user的/simple/{id}方法。回调调用的是HystrixClientFactory的findById方法 @RequestMapping(value = "/simple/{id}", method = RequestMethod.GET) public User findById(@PathVariable("id") Long id); }
package com.itmuch.cloud.feign; public interface UserFeignClientWithFactory extends UserFeignClient { }
spring: application: name: microservice-consumer-movie-feign-with-hystrix-hystrix-factory server: port: 7901 eureka: client: healthcheck: enabled: true serviceUrl: defaultZone: http://user:password123@localhost:8761/eureka instance: prefer-ip-address: true
<?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>
<artifactId>microservice-consumer-movie-feign-with-hystrix-hystrix-factory</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.itmuch.cloud</groupId>
<artifactId>microservice-spring-cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
</dependencies>
</project>