创建服务提供者

概述

当Eureka Client向Eureka Server注册时,它会提供一些元数据,例如主机和端口,URL,主页等。Eureka Server从每个Client实例接受心跳信息。如果心跳超时,则通常将该实例从注册Server剔除。

POM

       <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-starter-eureka</artifactId>        </dependency>

Application

import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.cloud.client.discovery.EnableDiscoveryClient;​@SpringBootApplication@EnableDiscoveryClientpublic class EurekaProviderApplication {​    public static void main(String[] args) {        SpringApplication.run(EurekaProviderApplication.class, args);   }}

Application.yml

server: port: 8089​eureka: client:   serviceUrl:     defaultZone: http://localhost:1111/eureka/ instance:   lease-renewal-interval-in-seconds: 10 #服务续约(默认30s)   lease-expiration-duration-in-seconds: 15 #服务剔除>服务续约时间(默认90s)   hostname: localhost   instance-id: ${spring.application.name}:${server.port}​spring: application:   name: eureka-providermanagement: security:   enabled: false #spring boot actuator#端点监控安全是否启用属性

注意： 需要指明 spring.application.name,这个很重要,这在以后的服务与服务之间相互调用一般都是根据这个 name 。从时间上来算,Eureka注册中心剔除一个失效服务需要3分钟,

客户端服务续约时间(30s)+客户端服务剔除时间(90s)+剔除失效服务时间(60s)=180秒

Controller

import lombok.extern.slf4j.Slf4j;import org.springframework.beans.factory.annotation.Autowired;;import org.springframework.cloud.client.serviceregistry.Registration;import org.springframework.cloud.client.serviceregistry.ServiceRegistry;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;​import javax.annotation.Resource;​@RestController@Slf4jpublic class HelloController {​    public static final String HELLO_WORLD = "Hello World!";     //spring cloud 1.2.0    @Resource    private Registration registration;​    @Autowired    private ServiceRegistry serviceRegistry;​    /**     * test eureka-client-ribbon model ribbon retry     * <br/>     **/    @GetMapping("/hello")    public String index() {        log.info("load balanced service instance meta: {}", registration.getMetadata());        log.info("load balanced host: {},port: {},service id: {}", registration.getHost(), registration.getPort(), registration.getServiceId());        log.info("service id: {}", registration.getServiceId());        log.info("service registry: {}", serviceRegistry.getStatus(registration));        return HELLO_WORLD;   }​}

启动工程,打开http://localhost:1111/,即为Eureka Server的网址

 

转载于:https://www.cnblogs.com/liuenyuan1996/p/10282626.html