【SpringCloud】第二篇: 服务消费者（rest+ribbon）

前言:

简介:

工具:

ribbon 简介

一、准备工作

二、新建服务消费者 (eureka-ribbon)

2.1 pom.xml

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

	<modelVersion>4.0.0</modelVersion>

	<groupId>com.lwc</groupId>

	<artifactId>eureka-ribbon</artifactId>

	<version>0.0.1-SNAPSHOT</version>

	<packaging>jar</packaging>

	<name>eureka-ribbon</name>

	<description>Demo project for Spring Boot</description>

	<parent>

		<groupId>org.springframework.boot</groupId>

		<artifactId>spring-boot-starter-parent</artifactId>

		<version>1.5.10.RELEASE</version>

		<relativePath/> <!-- lookup parent from repository -->

	</parent>

	<properties>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<java.version>1.8</java.version>

		<spring-cloud.version>Edgware.SR2</spring-cloud.version>

	</properties>

	<dependencies>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-web</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.cloud</groupId>

			<artifactId>spring-cloud-starter-eureka-server</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.cloud</groupId>

			<artifactId>spring-cloud-starter-ribbon</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-test</artifactId>

			<scope>test</scope>

		</dependency>

	</dependencies>

	<dependencyManagement>

		<dependencies>

			<dependency>

				<groupId>org.springframework.cloud</groupId>

				<artifactId>spring-cloud-dependencies</artifactId>

				<version>${spring-cloud.version}</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>

2.2  通过 application.yml 跳转 application-dev.yml 配置程序名, 端口 和指定注册中心 如下:

spring:

  application:

      name: eureka-ribbon

  profiles:

    active: ${@profileActiv@:dev}

eureka:

  client:

    serviceUrl:

      defaultZone: http://localhost:8761/eureka/

server:

  port: 8764

2.3  通过@EnableDiscoveryClient向服务中心注册, 并且利用ioc注入@Bean, 然后通过@LoadBalanced表明restTemplate()开启负载均衡功能; 如下:

package com.lwc;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

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

/**

 * @author Eddie

 */

@EnableDiscoveryClient

@SpringBootApplication

public class EurekaRibbonApplication {

    public static void main(String[] args) {

        SpringApplication.run(EurekaRibbonApplication.class, args);

    }

}

package com.lwc.template;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;

import org.springframework.context.annotation.Bean;

import org.springframework.stereotype.Component;

import org.springframework.web.client.RestTemplate;

/**

 * @author eddie.lee

 * @Package com.lwc.template

 * @ClassName RestConfig

 * @description

 * @date created in 2018-03-26 19:54

 * @modified by

 */

@Component

public class RestConfig {

    @Bean

    @LoadBalanced

    public RestTemplate restTemplate(){

        return new RestTemplate();

    }

}

2.4 创建服务层测试使用, ribbonService() 里面url使用了eureka-client服务器名称代替127.0.0.1:8762; 如下:

package com.lwc.service;

/**

 * @author eddie.lee

 * @Package com.lwc.service

 * @ClassName RibbonService

 * @description

 * @date created in 2018-03-26 19:55

 * @modified by

 */

public interface RibbonService {

    String ribbonService(String name);

}

package com.lwc.service.impl;

import com.lwc.service.RibbonService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.web.client.RestTemplate;

/**

 * @author eddie.lee

 * @Package com.lwc.service.impl

 * @ClassName RibbonServiceImpl

 * @description

 * @date created in 2018-03-26 19:57

 * @modified by

 */

@Service

public class RibbonServiceImpl implements RibbonService {

    @Autowired

    private RestTemplate restTemplate;

    @Override

    public String ribbonService(String name) {

        final String url = "http://eureka-client/eureka/client?name=" + name;

        return restTemplate.getForObject(url, String.class);

    }

}

2.5 创建 controller 作为调用测试服务层使用; 如下:

package com.lwc.controller;

import com.lwc.service.RibbonService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.RestController;

/**

 * @author eddie.lee

 * @Package com.lwc.controller

 * @ClassName RibbonControler

 * @description 服务消费者

 * @date created in 2018-03-26 20:02

 * @modified by

 */

@RestController

@RequestMapping("/eureka")

public class RibbonControler {

    @Autowired

    private RibbonService ribbonService;

    @GetMapping("/ribbon")

    public String Ribbon(@RequestParam String name) {

        return ribbonService.ribbonService(name);

    }

}

eureka-ribbon
http://localhost:8764/eureka/ribbon?name=eddie

标签

2-1

源码下载
https://github.com/eddie-code/SpringCloudDemo#springclouddemo