服务发现、注册-搭建Nacos服务
一、服务注册
可以参考：Nacos、Feign、Hystrix服务介绍安装、注册、启动、调用
完整的pom，注意版本问题
<?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> <modules> <module>service</module> <module>common</module> <module>infrastructure</module> </modules> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.stu</groupId> <artifactId>edu_parent</artifactId> <packaging>pom</packaging> <version>0.0.1-SNAPSHOT</version> <name>edu_parent</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <mybatis-plus.version>3.4.0</mybatis-plus.version> <velocity.version>2.0</velocity.version> <swagger.version>2.9.2</swagger.version> <aliyun.oss.version>3.1.0</aliyun.oss.version> <jodatime.version>2.10.6</jodatime.version> <commons-fileupload.version>1.3.1</commons-fileupload.version> <commons-io.version>2.6</commons-io.version> <commons-lang.version>3.9</commons-lang.version> <httpclient.version>4.5.1</httpclient.version> <jwt.version>0.9.1</jwt.version> <aliyun-java-sdk-core.version>4.3.3</aliyun-java-sdk-core.version> <aliyun-java-sdk-kms.version>2.10.1</aliyun-java-sdk-kms.version> <aliyun-java-sdk-vod.version>2.15.10</aliyun-java-sdk-vod.version> <aliyun-sdk-vod-upload.version>1.4.11</aliyun-sdk-vod-upload.version> <fastjson.version>1.2.28</fastjson.version> <gson.version>2.8.2</gson.version> <json.version>20170516</json.version> <commons-dbutils.version>1.6</commons-dbutils.version> <canal.client.version>1.1.4</canal.client.version> <docker.image.prefix>zx</docker.image.prefix> <alibaba.easyexcel.version>2.2.6</alibaba.easyexcel.version> <apache.xmlbeans.version>3.1.0</apache.xmlbeans.version> <cloud-alibaba.version>2.2.1.RELEASE</cloud-alibaba.version> <spring-cloud-starter-gateway>2.2.0.RELEASE</spring-cloud-starter-gateway> </properties> <dependencyManagement> <dependencies> <!--Spring Cloud--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Hoxton.SR8</version> <type>pom</type> <scope>import</scope> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-alibaba-dependencies --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>${cloud-alibaba.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!--mybatis-plus 持久层--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>${mybatis-plus.version}</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>${mybatis-plus.version}</version> </dependency> <!-- velocity 模板引擎, Mybatis Plus 代码生成器需要 --> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity-engine-core</artifactId> <version>${velocity.version}</version> </dependency> <!--swagger--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>${swagger.version}</version> </dependency> <!--swagger ui--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>${swagger.version}</version> </dependency> <!--aliyunOSS--> <dependency> <groupId>com.aliyun.oss</groupId> <artifactId>aliyun-sdk-oss</artifactId> <version>${aliyun.oss.version}</version> </dependency> <!--日期时间工具--> <dependency> <groupId>joda-time</groupId> <artifactId>joda-time</artifactId> <version>${jodatime.version}</version> </dependency> <!--文件上传--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>${commons-fileupload.version}</version> </dependency> <!--commons-io--> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>${commons-io.version}</version> </dependency> <!--commons-lang3--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>${commons-lang.version}</version> </dependency> <!--httpclient--> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>${httpclient.version}</version> </dependency> <!-- JWT --> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>${jwt.version}</version> </dependency> <!--aliyun--> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-core</artifactId> <version>${aliyun-java-sdk-core.version}</version> </dependency> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-kms</artifactId> <version>${aliyun-java-sdk-kms.version}</version> </dependency> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-vod</artifactId> <version>${aliyun-java-sdk-vod.version}</version> </dependency> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-sdk-vod-upload</artifactId> <version>${aliyun-sdk-vod-upload.version}</version> </dependency> <!-- json--> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>${json.version}</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>${gson.version}</version> </dependency> <dependency> <groupId>commons-dbutils</groupId> <artifactId>commons-dbutils</artifactId> <version>${commons-dbutils.version}</version> </dependency> <dependency> <groupId>com.alibaba.otter</groupId> <artifactId>canal.client</artifactId> <version>${canal.client.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>${alibaba.easyexcel.version}</version> </dependency> <dependency> <groupId>org.apache.xmlbeans</groupId> <artifactId>xmlbeans</artifactId> <version>${apache.xmlbeans.version}</version> </dependency> </dependencies> </dependencyManagement> <!-- <build>--> <!-- <plugins>--> <!-- <plugin>--> <!-- <groupId>org.springframework.boot</groupId>--> <!-- <artifactId>spring-boot-maven-plugin</artifactId>--> <!-- </plugin>--> <!-- </plugins>--> <!-- </build>--> </project>
配置Nacos客户端的pom依赖
<!--服务注册--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> </dependency>
2、添加服务配置信息
spring:
profiles:
# 环境设置
active: dev
application:
# 服务名
name: service-edu
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
3、添加Nacos客户端注解
package com.stu.service.edu; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.discovery.EnableDiscoveryClient; import org.springframework.cloud.openfeign.EnableFeignClients; import org.springframework.context.annotation.ComponentScan; @SpringBootApplication @EnableDiscoveryClient @EnableFeignClients @ComponentScan(basePackages = "com.stu") public class ServiceEduApplication { public static void main(String[] args) { SpringApplication.run(ServiceEduApplication.class, args); } }
4、启动客户端微服务
启动已注册的微服务，可以在Nacos服务列表中看到被注册的微服务
<!-- 服务调用 --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency>
@EnableFeignClients
创建client包
@FeignClient注解用于指定从哪个服务中调用功能 ，名称与被调用的服务名保持一致。
@GetMapping注解用于对被调用的微服务进行地址映射。
@PathVariable注解一定要指定参数名称，否则出错
package com.stu.service.edu.client; import com.stu.service.base.result.R; import com.stu.service.edu.client.fallback.VodFileDegradeFeignClient; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.DeleteMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestParam; import java.util.List; //这个是vod属性文件里的服务名，即spring.application.name=service-vod, //fallback是实现类的class //@FeignClient(name="service-vod",fallback = VodFileDegradeFeignClient.class)
@FeignClient("service-vod")
@Component public interface VodClient { //根据id删除阿里云视频(映射路径是Vod业务里controller层的类映射+方法上的映射，即 // @RequestMapping("/admin/vod") + @DeleteMapping("removeVideo/{id}") /* @FeignClient注解用于指定从哪个服务中调用功能 ，名称与被调用的服务名保持一致。 @GetMapping 注解用于对被调用的微服务进行地址映射。 @PathVariable 注解一定要指定参数名称，否则出错 @Component注解防止，在其他位置注入VodClient时idea报错*/ /*********************************** * 用途说明:根据视频id删除单个云端视频 * @param id * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ @DeleteMapping("/admin/vod/removeVideo/{id}") public R removeVideo(@PathVariable String id); /*********************************** * 用途说明:根据视频id删除多个云端视频 * @param videoIdList * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ //根据id批量删除阿里云视频 @DeleteMapping("/admin/vod/removeVideoBatch") public R removeVideoBatch(@RequestParam("videoIdList") List<String> videoIdList); }
package com.stu.service.edu.service.impl; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.stu.service.base.exception.CustomException; import com.stu.service.base.result.R; import com.stu.service.base.result.ResultCodeEnum; import com.stu.service.edu.client.VodClient; import com.stu.service.edu.entity.Video; import com.stu.service.edu.mapper.VideoMapper; import com.stu.service.edu.service.VideoService; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import org.apache.commons.lang3.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.util.ArrayList; import java.util.List; /** * <p> * 课程视频 服务实现类 * </p> * * @author stu * @since 2022-05-08 */ @Service public class VideoServiceImpl extends ServiceImpl<VideoMapper, Video> implements VideoService { @Autowired private VodClient vodClient; /*********************************** * 用途说明: * @param courseId * 返回值说明: * @return boolean ***********************************/ @Transactional(rollbackFor = Exception.class) @Override public boolean removeVideoByCourseId(String courseId) { //1根据课程id先删除小节 //删除小节，需要删除对应的视频文件 //1.根据课程id查询所有视频id QueryWrapper<Video> wrapperVidoe = new QueryWrapper(); wrapperVidoe.eq("course_id", courseId); wrapperVidoe.select("video_source_id");//设置只查出video_source_id这一列 List<Video> videoList = baseMapper.selectList(wrapperVidoe); //将List<Video>转换成List<String> List<String> idsList = null; if (null != videoList && videoList.size() > 0) { idsList = new ArrayList<>(); for (Video vo : videoList) { if (!StringUtils.isEmpty(vo.getVideoSourceId())) { idsList.add(vo.getVideoSourceId()); } } if (null != idsList && idsList.size() > 0) { //删除阿里云的视频 R result = vodClient.removeVideoBatch(idsList); //删除失败20001 if (result.getCode() == 20001) { throw new CustomException(ResultCodeEnum.VIDEO_DELETE_ALIYUN_ERROR); } } } /*baseMapper.deleteById(courseId);*/ QueryWrapper<Video> wrapper = new QueryWrapper(); wrapper.eq("course_id", courseId); return baseMapper.delete(wrapper) > 0; } /*********************************** * 用途说明:删除云端视频和数据库的信息 * @param id * 返回值说明: * @return boolean ***********************************/ @Override public boolean removeVodAndVideoByCourseId(String id) { Video video = baseMapper.selectById(id); String videoSourceId = video.getVideoSourceId(); if (StringUtils.isNotEmpty(videoSourceId)) { R result = vodClient.removeVideo(videoSourceId); //删除失败20001 if (result.getCode() == 20001) { throw new CustomException(ResultCodeEnum.VIDEO_DELETE_ALIYUN_ERROR); } } return baseMapper.deleteById(id) > 0; } }
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId> </dependency> <!--hystrix依赖，主要是用 @HystrixCommand --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-hystrix</artifactId> </dependency>
#开启熔断机制
feign.hystrix.enabled=true
# 设置hystrix超时时间，默认1000ms
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=6000
package com.stu.service.edu.client.fallback; import com.stu.service.base.result.R; import com.stu.service.edu.client.VodClient; import org.springframework.stereotype.Component; import java.util.List; @Component public class VodFileDegradeFeignClient implements VodClient { /*********************************** * 用途说明:根据视频id删除单个云端视频 * @param id * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ @Override public R removeVideo(String id) { return R.error().message("删除视频出错了"); } /*********************************** * 用途说明:根据视频id删除多个云端视频 * @param videoIdList * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ @Override public R removeVideoBatch(List<String> videoIdList) { return R.error().message("删除视频出错了"); } }
@FeignClient(name = "service-vod",fallback = VodClientFallback.class)
package com.stu.service.edu.client; import com.stu.service.base.result.R; import com.stu.service.edu.client.fallback.VodFileDegradeFeignClient; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.stereotype.Component; import org.springframework.web.bind.annotation.DeleteMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestParam; import java.util.List; //这个是vod属性文件里的服务名，即spring.application.name=service-vod, //fallback是实现类的class @FeignClient(name="service-vod",fallback = VodFileDegradeFeignClient.class) @Component public interface VodClient { //根据id删除阿里云视频(映射路径是Vod业务里controller层的类映射+方法上的映射，即 // @RequestMapping("/admin/vod") + @DeleteMapping("removeVideo/{id}") /* @FeignClient注解用于指定从哪个服务中调用功能 ，名称与被调用的服务名保持一致。 @GetMapping 注解用于对被调用的微服务进行地址映射。 @PathVariable 注解一定要指定参数名称，否则出错 @Component注解防止，在其他位置注入VodClient时idea报错*/ /*********************************** * 用途说明:根据视频id删除单个云端视频 * @param id * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ @DeleteMapping("/admin/vod/removeVideo/{id}") public R removeVideo(@PathVariable String id); /*********************************** * 用途说明:根据视频id删除多个云端视频 * @param videoIdList * 返回值说明: * @return com.stu.service.base.result.R ***********************************/ //根据id批量删除阿里云视频 @DeleteMapping("/admin/vod/removeVideoBatch") public R removeVideoBatch(@RequestParam("videoIdList") List<String> videoIdList); }
作者：明
出处：https://www.cnblogs.com/konglxblog//
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