May 27, 2018 2 min to read

Netflix Ribbon

学习Netflix Ribbon

理解

疑问

架构图

架构图

创建项目

前提环境 IDEA,JDK1.8

阅读这一章需要阅读Feign
创建用户模块,选择中父项目右键选中new->Module
点击next
设置好group和artifact名称,点击Next(我们之前已经创建过manage,现在我们再创建一个manage1)
选择Core»Lombok
设置项目名称,点击Finish
项目结构如下
项目默认的配置文件是.properties格式的,为方便好的阅读修改为.yml格式
在application.yml 文件中添加如下配置文件(负载均衡需要name名称相同,否则eureka会认为两个服务)

server:
  port: 8083

spring:
  application:
    name: manage

eureka:
    instance:
        statusPageUrlPath: /info
        healthCheckUrlPath: /health
        prefer-ip-address: true
        ip-address: 127.0.0.1

打开父项目的pom.xml文件,在modules标签里面加入如下

        <module>manage1</module>

打开user中的pom.xml文件,修改parent标签如下groupId和artifactId,version都需要指向父项目groupId和artifactId,version,其他修改如下

<?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.springcloud</groupId>
    <artifactId>manage1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>manage1</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>com.springcloud</groupId>
        <artifactId>cloud</artifactId>
        <version>0.0.1-SNAPSHOT</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>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

在manage1项目的启动类上加上@EnableFeignClients,@EnableEurekaClient注解
在manage1项目中定义一个controller

package com.springcloud.manage.rest;

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

/**
 * 测试controller
 * @Author yudong
 * @Date 2018年05月29日 上午12:48
 */
@RestController
public class TestController {

    @RequestMapping(value = "/getuserinfo", method = RequestMethod.GET)
    public String getuserinfo() {
        return "我是manage1";
    }
}

结构如图所示
启动这个项目如图
在注册中心查看是否存活
测试负载均衡是否成功(浏览器请求一个地址,却有两种结果,分别为manage何manage1服务的各自controller)

adongs | 博客

Netflix Ribbon

理解

疑问

架构图

创建项目

adongs | 博客