SpringCloud 实战七：服务发现Discovery

1、编写服务发现代码

• 引入服务发现包

import org.springframework.cloud.client.discovery.DiscoveryClient;

• 编写服务发现控制器

@GetMapping("/payment/discovery")
public Object discovery(){
    List<String> services = discoveryClient.getServices();
    for (String service : services) {
        log.info("******element: " + service);
    }
    List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
    for (ServiceInstance instance : instances) {
        log.info(instance.getInstanceId() + "\t" + instance.getHost() + "\t" + instance.getPort() + "\t" + instance.getUri());
    }
    return this.discoveryClient;
}

• 在启动类上开启服务发现

package com.laoxu.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class, args);
    }
}

2、启动服务

3、访问http://localhost:8001/payment/discovery

4、查看服务信息日志

2020-08-29 20:50:15.030  INFO 14536 --- [nio-8001-exec-4] c.l.s.controller.PaymentController       : ******element: cloud-payment-service

2020-08-29 20:50:15.031  INFO 14536 --- [nio-8001-exec-4] c.l.s.controller.PaymentController       : ******element: cloud-order-consumer

2020-08-29 20:50:15.031  INFO 14536 --- [nio-8001-exec-4] c.l.s.controller.PaymentController       : payment8001 192.168.190.1 8001 http://192.168.190.1:8001

2020-08-29 20:50:15.031  INFO 14536 --- [nio-8001-exec-4] c.l.s.controller.PaymentController       : payment8002 192.168.190.1 8002 http://192.168.190.1:8002