[bigdata-106] spring-cloud-03 创建一个hello服务并把它注册到e

1. 参考文档

https://github.com/dyc87112/SpringCloudBook/tree/master/hello-service

2. 源码结构

.
├── pom.xml
├── src
│ ? ├── main
│ ? │ ? ├── java
│ ? │ ? │ ? └── com
│ ? │ ? │ ? ? ? └── brian
│ ? │ ? │ ? ? ? ? ? └── demo
│ ? │ ? │ ? ? ? ? ? ? ? └── helloservice
│ ? │ ? │ ? ? ? ? ? ? ? ? ? └── App.java
│ ? │ ? └── resources
│ ? │ ? ? ? └── application.properties

3. pom.xml内容如下：

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.brian.demo</groupId>
	<artifactId>helloservice</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.3.7.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>

	<name>helloservice</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<repositories>
		<repository>
			<id>my-nexus-central</id>
			<name>my local nexus</name>
			<url>http://localhost:8081/nexus/content/repositories/central/</url>
			<releases>
				<enabled>true</enabled>
				<updatePolicy>never</updatePolicy>
			</releases>
		</repository>
	</repositories>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<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-eureka</artifactId>
		</dependency>

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

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>


	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Brixton.SR5</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

4. App.java

package com.brian.demo.helloservice;

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.netflix.hystrix.EnableHystrix;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@EnableHystrix
@EnableDiscoveryClient
@SpringBootApplication
public class App {
	
	@Autowired
	private DiscoveryClient client;

	@RequestMapping(value = "/hello",method = RequestMethod.GET)
	public String hello() throws Exception {
		ServiceInstance instance = client.getLocalServiceInstance();
		return "Hello World"+"-"+instance.getHost()+"-"+instance.getPort()+"-"+instance.getServiceId();
	}

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

}

spring.application.name=hello-service
server.port=8087
eureka.client.serviceUrl.defaultZone=http://peer1:1111/eureka/,http://peer2:1112/eureka/

mvn clean package

7. 运行

nohup java -jar target/helloservice-0.0.1-SNAPSHOT.jar &

8. 观察

在http://peer1:1111/和http://peer2:1112/均能看到这个服务被注册，包括ip和端口号。