建立eureka服务和客户端(客户端获取已经注册服务)

1. 新建sping boot eureka server

新建立spring starter  project

修改pom.xml文件

在parent后追加

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Camden.SR3</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

追加

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

应用

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@SpringBootApplication
@EnableEurekaServer
public class SpringBootEurekaServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootEurekaServerApplication.class, args);
    }
}

属性文件

server.port=8761

spring.application.name=Spring-Boot-Admin-Web
eureka.instance.hostname=localhost

eureka.client.registerWithEureka=true
eureka.client.fetchRegistry=false
eureka.client.serviceUrl.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka/

2. 建立spring boot eureka client

pom.xml

   	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Camden.SR3</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

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

应用

package com.example;

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.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
@EnableEurekaClient
public class SpringBootEurekaClientApplication {

	@Autowired
	private DiscoveryClient discoveryClient;

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }

    @RequestMapping("/registered")
    public String getRegistered(){
        List<ServiceInstance> list = discoveryClient.getInstances("STORES");
        System.out.println(discoveryClient.getLocalServiceInstance());
        System.out.println("discoveryClient.getServices().size() = " + discoveryClient.getServices().size());

        for( String s :  discoveryClient.getServices()){
        	System.out.println("services " + s);
        	List<ServiceInstance> serviceInstances =  discoveryClient.getInstances(s);
        	for(ServiceInstance si : serviceInstances){
        		System.out.println("    services:" + s + ":getHost()=" + si.getHost());
        		System.out.println("    services:" + s + ":getPort()=" + si.getPort());
        		System.out.println("    services:" + s + ":getServiceId()=" + si.getServiceId());
        		System.out.println("    services:" + s + ":getUri()=" + si.getUri());
        		System.out.println("    services:" + s + ":getMetadata()=" + si.getMetadata());
        	}

        }

        System.out.println(list.size());
        if (list != null && list.size() > 0 ) {
            System.out.println( list.get(0).getUri()  );
        }
    	return null;
    }

	public static void main(String[] args) {
		SpringApplication.run(SpringBootEurekaClientApplication.class, args);
	}
}

配置文件

spring.application.name=cloud-simple-service
server.port=8011

eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/