@EnableDiscoveryClient和@EnableEurekaClient的区别
马克- to-win:马克 java社区:防盗版实名手机尾号: 73203。
@EnableDiscoveryClient和@EnableEurekaClient的区别?马克-to-win@马克java社区:在前面的服务提供者的例子中我们是用@EnableEurekaClient,其实二者的功能是一样的。但是如果选用的是eureka服务器,那么就推荐@EnableEurekaClient,如果是其他的注册中心,那么推荐使用@EnableDiscoveryClient。
马克-to-win@马克java社区:下面的RestTemplate本身不具备调用分布式服务的能力,但被@LoadBalanced修饰后就具有访问分布式服务的能力了(本helloworld例子不做探讨)
package com;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@EnableDiscoveryClient
@SpringBootApplication
public class ConsumerApplication {
@Bean
@LoadBalanced
public RestTemplate restTemplate () {
return new RestTemplate ();
}
public static void main(String[] args) {
SpringApplication.run(ConsumerApplication.class, args);
}
}
@RestController
class ConsumerCotroller {
@Autowired
private RestTemplate template;
@RequestMapping("/consumer")
public String consume() {
ResponseEntity<String> responseEntity = template.getForEntity("http://provider/acquire", String.class);
String body = responseEntity.getBody();//也能getStatusCode()等,都是Response实体的方法。
return body;
}
@Autowired
private DiscoveryClient discoveryClient;
/*http://192.168.0.101:9000/services/provider测的时候,这么测*/
@RequestMapping("/services/{appName}")
public String myGetIns(@PathVariable String appName) {
/*马克-to-win@马克java社区:发现客户的工具discoveryClient,可以通过getInstances,找到分布的一堆叫这个名字的service*/
// ServiceInstance si=this.discoveryClient.getLocalServiceInstance();
// return si.getHost();
List<ServiceInstance> list = this.discoveryClient.getInstances(appName);
if (list != null && list.size() > 0 )
{ return list.get(0).getHost()+list.get(0).getMetadata(); }
return null;
}
}
运行结果: