第 1 节 案例说明
本部分我们按照普通⽅式模拟⼀个微服务之间的调⽤(后续我们将⼀步步使⽤Spring Cloud的组件对案例进⾏改造)。
拉勾App⾥有这样⼀个功能:“⾯试直通⻋”,当求职⽤户开启了⾯试直通⻋之后,会根据企业客户的招聘岗位需求进⾏双向匹配。其中有⼀个操作是:为企业⽤户开启⼀个定时任务,根据企业录⼊的⽤⼈条件,每⽇匹配⼀定数量的应聘者“投递”到企业的资源池中去,那么系统在将匹配到的应聘者投递到资源池的时候需要先检查:此时应聘者默认简历的状态(公开/隐藏),如果此时默认简历的状态已经被应聘者设置为“隐藏”,那么不再执⾏“投递”操作。 “⾃动投递功能”在“⾃动投递微服务”中,“简历状态查询功能” 在“简历微服务”中,那么就涉及到“⾃动投递微服务”调⽤“简历微服务”查询简历。在这种场景下,“⾃动投递微服务”就是⼀个服务消费者,“简历微服务”就是⼀个服务提供者
第 2 节 案例数据库环境准备
本次课程数据库使⽤Mysql 5.7.x
简历基本信息表 r_resume
/*
Navicat Premium Data Transfer
Source Server : localhost
Source Server Type : MySQL
Source Server Version : 50717
Source Host : 127.0.0.1:3306
Source Schema : lagou
Target Server Type : MySQL
Target Server Version : 50717
File Encoding : 65001
Date: 19/04/2020 17:49:15
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for r_resume
-- ----------------------------
DROP TABLE IF EXISTS `r_resume`;
CREATE TABLE `r_resume` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`sex` varchar(10) DEFAULT NULL COMMENT '性别',
`birthday` varchar(30) DEFAULT NULL COMMENT '出生日期',
`work_year` varchar(100) DEFAULT NULL COMMENT '工作年限',
`phone` varchar(20) DEFAULT NULL COMMENT '手机号码',
`email` varchar(100) DEFAULT NULL COMMENT '邮箱',
`status` varchar(80) DEFAULT NULL COMMENT '目前状态',
`resumeName` varchar(500) DEFAULT NULL COMMENT '简历名称',
`name` varchar(40) DEFAULT NULL,
`createTime` datetime DEFAULT NULL COMMENT '创建日期',
`headPic` varchar(100) DEFAULT NULL COMMENT '头像',
`isDel` int(2) DEFAULT NULL COMMENT '是否删除 默认值0-未删除 1-已删除',
`updateTime` datetime DEFAULT NULL COMMENT '简历更新时间',
`userId` int(11) DEFAULT NULL COMMENT '用户ID',
`isDefault` int(2) DEFAULT NULL COMMENT '是否为默认简历 0-默认 1-非默认',
`highestEducation` varchar(20) DEFAULT '' COMMENT '最高学历',
`deliverNearByConfirm` int(2) DEFAULT '0' COMMENT '投递附件简历确认 0-需要确认 1-不需要确认',
`refuseCount` int(11) NOT NULL DEFAULT '0' COMMENT '简历被拒绝次数',
`markCanInterviewCount` int(11) NOT NULL DEFAULT '0' COMMENT '被标记为可面试次数',
`haveNoticeInterCount` int(11) NOT NULL DEFAULT '0' COMMENT '已通知面试次数',
`oneWord` varchar(100) DEFAULT '' COMMENT '一句话介绍自己',
`liveCity` varchar(100) DEFAULT '' COMMENT '居住城市',
`resumeScore` int(3) DEFAULT NULL COMMENT '简历得分',
`userIdentity` int(1) DEFAULT '0' COMMENT '用户身份1-学生 2-工人',
`isOpenResume` int(1) DEFAULT '3' COMMENT '人才搜索-开放简历 0-关闭,1-打开,2-简历未达到投放标准被动关闭 3-从未设置过开放简历',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2195388 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of r_resume
-- ----------------------------
BEGIN;
INSERT INTO `r_resume` VALUES (2195320, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 13:40:14', 'images/myresume/default_headpic.png', 0, '2015-04-24 13:40:14', 1545132, 1, '本科', 0, 0, 0, 0, '', '广州', 15, 0, 3);
INSERT INTO `r_resume` VALUES (2195321, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 14:17:54', 'images/myresume/default_headpic.png', 0, '2015-04-24 14:20:35', 1545133, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195322, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 14:42:45', 'images/myresume/default_headpic.png', 0, '2015-04-24 14:43:34', 1545135, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195323, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 14:48:19', 'images/myresume/default_headpic.png', 0, '2015-04-24 14:50:34', 1545136, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195331, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 18:43:35', 'images/myresume/default_headpic.png', 0, '2015-04-24 18:44:08', 1545145, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195333, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-24 19:01:13', 'images/myresume/default_headpic.png', 0, '2015-04-24 19:01:14', 1545148, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195336, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-27 14:13:02', 'images/myresume/default_headpic.png', 0, '2015-04-27 14:13:02', 1545155, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195337, '女', '1990', '2年', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿的简历', 'wps', '2015-04-27 14:36:55', 'images/myresume/default_headpic.png', 0, '2015-04-27 14:36:55', 1545158, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195369, '女', '1990', '10年以上', '199999999', 'test@testtest01.com', '我目前已离职,可快速到岗', '稻壳儿', 'wps', '2015-05-15 18:08:19', 'images/myresume/default_headpic.png', 0, '2015-05-15 18:08:19', 1545346, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195374, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 17:53:37', 'images/myresume/default_headpic.png', 0, '2015-06-04 17:53:39', 1545523, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195375, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:11:06', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:11:07', 1545524, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195376, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:12:19', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:12:19', 1545525, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195377, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:13:28', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:13:28', 1545526, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195378, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:15:16', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:15:16', 1545527, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195379, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:23:06', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:23:06', 1545528, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195380, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:23:38', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:23:39', 1545529, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195381, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:27:33', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:27:33', 1545530, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195382, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:31:36', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:31:39', 1545531, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195383, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 18:36:48', 'images/myresume/default_headpic.png', 0, '2015-06-04 18:36:48', 1545532, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195384, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 19:15:15', 'images/myresume/default_headpic.png', 0, '2015-06-04 19:15:16', 1545533, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195385, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 19:28:53', 'images/myresume/default_headpic.png', 0, '2015-06-04 19:28:53', 1545534, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195386, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 19:46:42', 'images/myresume/default_headpic.png', 0, '2015-06-04 19:46:45', 1545535, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
INSERT INTO `r_resume` VALUES (2195387, '女', '1990', '1年', '199999999', 'test@testtest01.com', '我目前正在职,正考虑换个新环境', '稻壳儿', 'wps', '2015-06-04 19:48:16', 'images/myresume/default_headpic.png', 0, '2015-06-04 19:48:16', 1545536, 1, '本科', 0, 0, 0, 0, '', '广州', 65, 0, 3);
COMMIT;
SET FOREIGN_KEY_CHECKS = 1;
注意:数据的初始化可以参考⽼师提供的“数据库初始化脚本.sql”,也可以⾃⼰制造⼀批测试数据
第 3 节 案例⼯程环境准备
我们基于SpringBoot来构造⼯程环境,我们的⼯程模块关系如下所示:
⽗⼯程lagou-parent
在Idea中新建module,命名为lagou-parent
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.lagou.edu</groupId>
<artifactId>lagou-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<!--父工程打包方式为pom-->
<packaging>pom</packaging>
<!--spring boot 父启动器依赖-->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.6.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<!--spring cloud依赖管理,引入了Spring Cloud的版本-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!--web依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--日志依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</dependency>
<!--测试依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--lombok工具-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.4</version>
<scope>provided</scope>
</dependency>
<!-- Actuator可以帮助你监控和管理Spring Boot应用-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--热部署-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<!--eureka server 需要引入Jaxb,开始-->
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-core</artifactId>
<version>2.2.11</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</dependency>
<dependency>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
<version>2.2.11</version>
</dependency>
<dependency>
<groupId>org.glassfish.jaxb</groupId>
<artifactId>jaxb-runtime</artifactId>
<version>2.2.10-b140310.1920</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<!--引入Jaxb,结束-->
<!--<!–spring cloud commons模块引入–>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-commons</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.retry</groupId>
<artifactId>spring-retry</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>-->
<!--链路追踪-->
<!--<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>-->
</dependencies>
<build>
<plugins>
<!--编译插件-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>11</source>
<target>11</target>
<encoding>utf-8</encoding>
</configuration>
</plugin>
<!--打包插件-->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
第 4 节 案例核⼼微服务开发及通信调⽤
4.1 简历微服务
pom⽂件导⼊坐标
在lagou-service-resume模块的pom.xml中导⼊如下操作数据库相关坐标(可放到lagou-service-common)
<?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">
<parent>
<artifactId>lagou-parent</artifactId>
<groupId>com.lagou.edu</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>lagou-service-common</artifactId>
<dependencies>
<!--Spring Data Jpa-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
</project>
实体类开发
实体类统⼀放置到lagou-service-common模块中,包路径为com.lagou.edu.pojo.Resume.java
package com.lagou.edu.pojo;
import lombok.Data;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Data
@Entity
@Table(name="r_resume")
public class Resume {
@Id
private Long id; // 主键
private String sex; // 性别
private String birthday; // 生日
private String work_year; // 工作年限
private String phone; // 手机号
private String email; // 邮箱
private String status; // 目前状态
private String resumeName; // 简历名称
private String name; // 姓名
private String createTime; // 创建时间
private String headPic; // 头像
private Integer isDel; //是否删除 默认值0-未删除 1-已删除
private String updateTime; // 简历更新时间
private Long userId; // 用户ID
private Integer isDefault; // 是否为默认简历 0-默认 1-非默认
private String highestEducation; // 最高学历
private Integer deliverNearByConfirm; // 投递附件简历确认 0-需要确认 1-不需要确认
private Integer refuseCount; // 简历被拒绝次数
private Integer markCanInterviewCount; //被标记为可面试次数
private Integer haveNoticeInterCount; //已通知面试次数
private String oneWord; // 一句话介绍自己
private String liveCity; // 居住城市
private Integer resumeScore; // 简历得分
private Integer userIdentity; // 用户身份1-学生 2-工人
private Integer isOpenResume; // 人才搜索-开放简历 0-关闭,1-打开,2-简历未达到投放标准被动关闭 3-从未设置过开放简历
}
Dao层接⼝
哪个业务模块的Dao层接⼝就放置到哪个模块中,此处我们放置在lagou-service-resume中,包路径com.lagou.edu.dao
ResumeDao
package com.lagou.edu.dao;
import com.lagou.edu.pojo.Resume;
import org.springframework.data.jpa.repository.JpaRepository;
public interface ResumeDao extends JpaRepository<Resume,Long> {
}
Service层接⼝和实现类
package com.lagou.edu.service;
import com.lagou.edu.pojo.Resume;
public interface ResumeService {
Resume findDefaultResumeByUserId(Long userId);
}
package com.lagou.edu.service.impl;
import com.lagou.edu.dao.ResumeDao;
import com.lagou.edu.pojo.Resume;
import com.lagou.edu.service.ResumeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.stereotype.Service;
@Service
public class ResumeServiceImpl implements ResumeService {
@Autowired
private ResumeDao resumeDao;
@Override
public Resume findDefaultResumeByUserId(Long userId) {
Resume resume = new Resume();
resume.setUserId(userId);
// 查询默认简历
resume.setIsDefault(1);
Example<Resume> example = Example.of(resume);
return resumeDao.findOne(example).get();
}
}
Controller控制层
package com.lagou.edu.controller;
import com.lagou.edu.service.ResumeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/resume")
public class ResumeController {
@Autowired
private ResumeService resumeService;
@Value("${server.port}")
private Integer port;
//"/resume/openstate/1545132"
@GetMapping("/openstate/{userId}")
public Integer findDefaultResumeState(@PathVariable Long userId) {
// 模拟处理超时
/*try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}*/
//return resumeService.findDefaultResumeByUserId(userId).getIsOpenResume();
System.out.println("====>>>>>>>>>>>>>>我是8080,访问到我这里了......");
return port;
}
}
SpringBoot启动类
package com.lagou.edu;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@SpringBootApplication
@EntityScan("com.lagou.edu.pojo")
//@EnableEurekaClient // 开启Eureka Client(Eureka独有)
@EnableDiscoveryClient // 开启注册中心客户端 (通用型注解,比如注册到Eureka、Nacos等)
// 说明:从SpringCloud的Edgware版本开始,不加注解也ok,但是建议大家加上
public class LagouResumeApplication {
public static void main(String[] args) {
SpringApplication.run(LagouResumeApplication.class,args);
}
}
yml配置⽂件
server:
port: 8080
spring:
application:
name: lagou-service-resume
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/lagou?useUnicode=true&characterEncoding=utf8
username: root
password: 123456
jpa:
database: MySQL
show-sql: true
hibernate:
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl #避免将驼峰命名转换为下划线命名
cloud:
# config客户端配置,和ConfigServer通信,并告知ConfigServer希望获取的配置信息在哪个文件中
config:
name: lagou-service-resume #配置文件名称
profile: dev #后缀名称
label: master #分支名称
uri: http://localhost:9006 #ConfigServer配置中心地址
rabbitmq:
host: 127.0.0.1
port: 5672
username: guest
password: guest
#注册到Eureka服务中心
eureka:
client:
service-url:
# 注册到集群,就把多个Eurekaserver地址使用逗号连接起来即可;注册到单实例(非集群模式),那就写一个就ok
defaultZone: http://LagouCloudEurekaServerA:8761/eureka,http://LagouCloudEurekaServerB:8762/eureka
instance:
prefer-ip-address: true #服务实例中显示ip,而不是显示主机名(兼容老的eureka版本)
# 实例名称: 192.168.1.103:lagou-service-resume:8080,我们可以自定义它
instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}:@project.version@
# 自定义Eureka元数据
metadata-map:
cluster: cl1
region: rn1
management:
endpoints:
web:
exposure:
include: "*"
4.2 ⾃动投递微服务
application.yml
server:
port: 8090
Controller控制层
package com.lagou.edu.controller;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import java.util.List;
@RestController
@RequestMapping("/autodeliver")
public class AutodeliverController {
@Autowired
private RestTemplate restTemplate;
// /autodeliver/checkState/1545132
/*@GetMapping("/checkState/{userId}")
public Integer findResumeOpenState(@PathVariable Long userId) {
// 调用远程服务—> 简历微服务接口 RestTemplate -> JdbcTempate
// httpclient封装好多内容进行远程调用
Integer forObject = restTemplate.getForObject("http://localhost:8080/resume/openstate/" + userId, Integer.class);
return forObject;
}*/
@Autowired
private DiscoveryClient discoveryClient;
/**
* 服务注册到Eureka之后的改造
* @param userId
* @return
*/
/*@GetMapping("/checkState/{userId}")
public Integer findResumeOpenState(@PathVariable Long userId) {
// TODO 从Eureka Server中获取我们关注的那个服务的实例信息以及接口信息
// 1、从 Eureka Server中获取lagou-service-resume服务的实例信息(使用客户端对象做这件事)
List<ServiceInstance> instances = discoveryClient.getInstances("lagou-service-resume");
// 2、如果有多个实例,选择一个使用(负载均衡的过程)
ServiceInstance serviceInstance = instances.get(0);
// 3、从元数据信息获取host port
String host = serviceInstance.getHost();
int port = serviceInstance.getPort();
String url = "http://" + host + ":" + port + "/resume/openstate/" + userId;
System.out.println("===============>>>从EurekaServer集群获取服务实例拼接的url:" + url);
// 调用远程服务—> 简历微服务接口 RestTemplate -> JdbcTempate
// httpclient封装好多内容进行远程调用
Integer forObject = restTemplate.getForObject(url, Integer.class);
return forObject;
}*/
/**
* 使用Ribbon负载均衡
* @param userId
* @return
*/
@GetMapping("/checkState/{userId}")
public Integer findResumeOpenState(@PathVariable Long userId) {
// 使用ribbon不需要我们自己获取服务实例然后选择一个那么去访问了(自己的负载均衡)
String url = "http://lagou-service-resume/resume/openstate/" + userId; // 指定服务名
Integer forObject = restTemplate.getForObject(url, Integer.class);
return forObject;
}
}
SpringBoot启动类
package com.lagou.edu;
import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableDiscoveryClient
//@EnableHystrix // 开启Hystrix功能
@EnableCircuitBreaker // 开启熔断器功能
//@SpringCloudApplication 综合性的注解 @SpringCloudApplication = @SpringBootApplication + @EnableDiscoveryClient + @EnableCircuitBreaker
public class AutodeliverApplication8090 {
public static void main(String[] args) {
SpringApplication.run(AutodeliverApplication8090.class,args);
}
}
第 5 节 案例代码问题分析
我们在⾃动投递微服务中使⽤RestTemplate调⽤简历微服务的简历状态接⼝时(Restful API 接⼝)。在微服务分布式集群环境下会存在什么问题呢?怎么解决?
存在的问题:
1)在服务消费者中,我们把url地址硬编码到代码中,不⽅便后期维护。
2)服务提供者只有⼀个服务,即便服务提供者形成集群,服务消费者还需要⾃⼰实现负载均衡。
3)在服务消费者中,不清楚服务提供者的状态。
4)服务消费者调⽤服务提供者时候,如果出现故障能否及时发现不向⽤户抛出异常⻚⾯?
5)RestTemplate这种请求调⽤⽅式是否还有优化空间?能不能类似于Dubbo那样玩?
6)这么多的微服务统⼀认证如何实现?
7)配置⽂件每次都修改好多个很麻烦!?
8)….
上述分析出的问题,其实就是微服务架构中必然⾯临的⼀些问题:
1)服务管理:⾃动注册与发现、状态监管
2)服务负载均衡
3)熔断
4)远程过程调⽤
5)⽹关拦截、路由转发
6)统⼀认证
7)集中式配置管理,配置信息实时⾃动更新