SpringCloudAlibaba之Nacos实现服务注册与发现

上一篇：SpringCloudAlibaba之Nacos环境搭建

Maven依赖信息

<parent>      <groupId>org.springframework.bootgroupId>      <artifactId>spring-boot-starter-parentartifactId>      <version>2.0.0.RELEASEversion>  parent> <dependencies>         <dependency>         <groupId>org.springframework.bootgroupId>         <artifactId>spring-boot-starter-webartifactId>     dependency>     <dependency>         <groupId>org.springframework.cloudgroupId>         <artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>         <version>0.2.2.RELEASEversion>     dependency> dependencies>

 

 

会员服务(生产者)

@RestController public class MemberService {     @Value("${server.port}")     private String serverPort;     /**      * 会员服务提供的接口      *      * @param userId      * @return      */     @RequestMapping("/getUser")     public String getUser(Integer userId) {         return "每特教育,端口号:" + serverPort;     } }

 

配置文件

application.yml文件

spring:   cloud:     nacos:       discovery:         ###服务注册地址         server-addr: 127.0.0.1:8848   application:     name: mayikt-member server:   port: 8081

订单服务(消费者)

@RestController public class OrderService {     @Autowired     private RestTemplate restTemplate;     @Autowired     private DiscoveryClient discoveryClient;     @Autowired     private LoadBalancer loadBalancer;        @RequestMapping("/orderToMember")     public String orderToMember() {         // 从注册中心上获取该注册服务列表         List serviceInstanceList = discoveryClient.getInstances("mayikt-member");         ServiceInstance serviceInstance = loadBalancer.getSingleAddres(serviceInstanceList);         URI rpcMemberUrl = serviceInstance.getUri();         // 使用本地rest形式实现rpc调用         String result = restTemplate.getForObject(rpcMemberUrl + "/getUser", String.class);         return "订单调用会员获取结果:" + result;     } }

application.yml文件

spring:   cloud:     nacos:       discovery:         ###服务注册地址         server-addr: 127.0.0.1:8848   application:     name: mayikt-order server:   port: 8082

 

负载均衡算法

public interface LoadBalancer {     /**      * 根据多个不同的地址 返回单个调用rpc地址      *      * @param serviceInstances      * @return      */     ServiceInstance getSingleAddres(List serviceInstances); }   @Component public class RotationLoadBalancer implements LoadBalancer {     private AtomicInteger atomicInteger = new AtomicInteger(0);     @Override     public ServiceInstance getSingleAddres(List serviceInstances) {         int index = atomicInteger.incrementAndGet() % 2;         ServiceInstance serviceInstance = serviceInstances.get(index);         return serviceInstance;     } }

以上内容学习来源于每特教育蚂蚁课堂 http://www.mayikt.com/front/couinfo/247/0#
 

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