当Client向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实例接收心跳消息。如果心跳超时, 则通常将该实例从注册Server中删掉。
POM
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.funtl</groupId>
<artifactId>hello-spring-cloud-dependencies</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../hello-spring-cloud-dependencies/pom.xml</relativePath>
</parent>
<artifactId>hello-spring-cloud-service-admin</artifactId>
<packaging>jar</packaging>
<name>hello-spring-cloud-service-admin</name>
<url>http://www.funtl.com</url>
<inceptionYear>2018-Now</inceptionYear>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.funtl.hello.spring.cloud.service.admin.ServiceAdminApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
Application
通过注解@EnableEurekaClient表明自己是一个Eureka Client.
package com.funtl.spring.cloud.service.admin;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class ServiceAdminApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceAdminApplication.class, args);
}
}
application.yml
spring:
application:
name: hello-spring-cloud-service-admin
server:
port: 8762
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
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
Controller
package com.funtl.hello.spring.cloud.eureka.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class AdminController {
@Value("${server.port}")
private String port;
@RequestMapping(value="hi", method= RequestMethod.GET)
public String sayHi(String message){
return String.format("Hi your message is: %s port: %s", message, port);
}
}