微服务工程依赖
<?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">
<parent>
<artifactId>parent</artifactId>
<groupId>org.limakilo</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>consumer</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
</project>
application.yml文件
server:
port: 10001
spring:
application:
name: consumer
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
# 开启服务无法成功调用时,调用fallback类对应的方法
feign:
hystrix:
enabled: true
自定义feign客户端()
调用hello方法
会请求nacos-discovery-server服务对应的映射地址
package org.limakilo;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
@FeignClient(name="nacos-discovery-server",fallback = FeignError.class)
public interface ForeignClient {
@GetMapping("/hello")
String hello();
}
fallback类
package org.limakilo;
import org.springframework.stereotype.Component;
@Component
public class FeignError implements ForeignClient {
@Override
public String hello() {
return "10001异常";
}
}
启动类+controller类
package org.limakilo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@EnableFeignClients
@ResponseBody
@SpringBootApplication
@EnableDiscoveryClient
@Controller
public class ConsumerApplication {
@Autowired
ForeignClient foreignClient;
public static void main(String[] args) {
SpringApplication.run(ConsumerApplication.class);
}
@GetMapping("/hello")
public String hello() {
return foreignClient.hello();
}
}
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