在微服务整合dubbo，以为微服务版的若依为例
- 一、环境
- 二、整合过程
- 1、父模块依赖
- 2、生产者
- 3、消费者
- 三、修改若依的服务调用方式为dubbo
- 1、改造系统模块
- 2、改造认证授权中心
- 四、整合过程遇到的问题
- 1、出现循环引用
- 2、出现依赖冲突
- 3、启动出现端口号被占用
- 4、出现某个类找不到
- 5、找不到生产者
一、环境
微服务版若依3.6.3
dubbo2021.0.1
nacos2.2.1
二、整合过程
1、父模块依赖
<?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.ruoyi</groupId><artifactId>ruoyi</artifactId><version>3.6.3</version><name>human</name><url>http://www.ruoyi.vip</url><description>若依管理系统</description><properties><ruoyi.version>3.6.3</ruoyi.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><spring-boot.version>2.7.13</spring-boot.version><spring-cloud.version>2021.0.8</spring-cloud.version><spring-cloud-alibaba.version>2021.0.5.0</spring-cloud-alibaba.version><spring-boot-admin.version>2.7.10</spring-boot-admin.version><swagger.fox.version>3.0.0</swagger.fox.version><swagger.core.version>1.6.2</swagger.core.version><tobato.version>1.27.2</tobato.version><kaptcha.version>2.3.3</kaptcha.version><pagehelper.boot.version>1.4.7</pagehelper.boot.version><druid.version>1.2.16</druid.version><dynamic-ds.version>3.5.2</dynamic-ds.version><commons.io.version>2.11.0</commons.io.version><velocity.version>2.3</velocity.version><fastjson.version>2.0.34</fastjson.version><jjwt.version>0.9.1</jjwt.version><minio.version>8.2.2</minio.version><poi.version>4.1.2</poi.version><transmittable-thread-local.version>2.14.3</transmittable-thread-local.version><dubbo.version>2021.0.1.0</dubbo.version><hutool-all.version>5.8.16</hutool-all.version><lombok.version>1.18.24</lombok.version><minio.version>8.2.2</minio.version><guava.version>33.0.0-jre</guava.version></properties><!-- 依赖声明 --><dependencyManagement><dependencies><!-- SpringCloud 微服务 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringCloud Alibaba 微服务 --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>${spring-cloud-alibaba.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringBoot 依赖配置 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency><!-- FastDFS 分布式文件系统 --><dependency><groupId>com.github.tobato</groupId><artifactId>fastdfs-client</artifactId><version>${tobato.version}</version></dependency><!-- Swagger 依赖配置 --><dependency><groupId>io.swagger</groupId><artifactId>swagger-models</artifactId><version>${swagger.core.version}</version></dependency><dependency><groupId>io.swagger</groupId><artifactId>swagger-annotations</artifactId><version>${swagger.core.version}</version></dependency><!-- 验证码 --><dependency><groupId>pro.fessional</groupId><artifactId>kaptcha</artifactId><version>${kaptcha.version}</version></dependency><!-- pagehelper 分页插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>${pagehelper.boot.version}</version></dependency><!-- io常用工具类 --><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>${commons.io.version}</version></dependency><!-- excel工具 --><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>${poi.version}</version></dependency><!-- 代码生成使用模板 --><dependency><groupId>org.apache.velocity</groupId><artifactId>velocity-engine-core</artifactId><version>${velocity.version}</version></dependency><!-- JSON 解析器和生成器 --><dependency><groupId>com.alibaba.fastjson2</groupId><artifactId>fastjson2</artifactId><version>${fastjson.version}</version></dependency><!-- JWT --><dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt</artifactId><version>${jjwt.version}</version></dependency><!-- 线程传递值 --><dependency><groupId>com.alibaba</groupId><artifactId>transmittable-thread-local</artifactId><version>${transmittable-thread-local.version}</version></dependency><!-- 核心模块 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-core</artifactId><version>${ruoyi.version}</version></dependency><!-- 接口模块 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId><version>${ruoyi.version}</version></dependency><!-- 安全模块 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-security</artifactId><version>${ruoyi.version}</version></dependency><!-- 权限范围 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId><version>${ruoyi.version}</version></dependency><!-- 多数据源 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId><version>${ruoyi.version}</version></dependency><!-- 分布式事务 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-seata</artifactId><version>${ruoyi.version}</version></dependency><!-- 日志记录 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-log</artifactId><version>${ruoyi.version}</version></dependency><!-- 缓存服务 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-redis</artifactId><version>${ruoyi.version}</version></dependency><!-- 系统接口 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-api-system</artifactId><version>${ruoyi.version}</version></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId><version>${dubbo.version}</version></dependency><!-- hutool工具类--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>${hutool-all.version}</version></dependency><!-- Lombok --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>${lombok.version}</version></dependency><!-- Minio --><dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>${minio.version}</version></dependency><!--这个依赖是整合dubbo时要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>${guava.version}</version></dependency></dependencies></dependencyManagement><modules><module>ruoyi-auth</module><module>ruoyi-gateway</module><module>ruoyi-visual</module><module>ruoyi-modules</module><module>ruoyi-api</module><module>ruoyi-common</module></modules><packaging>pom</packaging><dependencies><!-- bootstrap 启动器 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>${java.version}</source><target>${java.version}</target><encoding>${project.build.sourceEncoding}</encoding></configuration></plugin></plugins><pluginManagement><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>${spring-boot.version}</version><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></pluginManagement></build><repositories><repository><id>public</id><name>aliyun nexus</name><url>https://maven.aliyun.com/repository/public</url><releases><enabled>true</enabled></releases></repository></repositories><pluginRepositories><pluginRepository><id>public</id><name>aliyun nexus</name><url>https://maven.aliyun.com/repository/public</url><releases><enabled>true</enabled></releases><snapshots><enabled>false</enabled></snapshots></pluginRepository></pluginRepositories></project>2、生产者
因为我要调用若依的文件服务，所以直接将文件服务作为生产者。依赖如下：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://maven.apache.org/POM/4.0.0"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><groupId>com.ruoyi</groupId><artifactId>ruoyi-modules</artifactId><version>3.6.3</version></parent><modelVersion>4.0.0</modelVersion><artifactId>ruoyi-modules-file</artifactId><description>ruoyi-modules-file文件服务</description><dependencies><!-- SpringCloud Alibaba Nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- SpringCloud Alibaba Nacos Config --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><!-- SpringCloud Alibaba Sentinel --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!-- SpringBoot Actuator --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- FastDFS --><dependency><groupId>com.github.tobato</groupId><artifactId>fastdfs-client</artifactId></dependency><!-- RuoYi Api System --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-api-system</artifactId></dependency><!-- RuoYi Common Swagger --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId></dependency><!-- hutool工具类--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency><!-- Minio --><dependency><groupId>io.minio</groupId><artifactId>minio</artifactId></dependency><!-- Mysql Connector --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId></dependency><!-- RuoYi Common DataSource --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId></dependency><!-- RuoYi Common DataScope --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId></dependency></dependencies><build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>主要是这个依赖
<!-- Dubbo -->
<!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo -->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId><version>2021.0.1.0</version>
</dependency>
先在文件服务的 bootstrap.yml 加上如下配置，解决循环引用
# Tomcat
server:port: 9300# Spring
spring:application:# 应用名称name: ruoyi-filemain:allow-circular-references: true # 中断循环引用profiles:# 环境配置active: devcloud:nacos:discovery:# 服务注册地址server-addr: 127.0.0.1:8848config:# 配置中心地址server-addr: 127.0.0.1:8848# 配置文件格式file-extension: yml# 共享配置shared-configs:- application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}如何在nacos中对应的配置文件中添加如下配置：
# dubbo相关配置
dubbo:protocol:name: dubbo # dubbo协议port: -1 # -1表示端口从20880开始递增，不会造成端口冲突registry:address: nacos://127.0.0.1:8848# check: false # dubbo默认有启动检查scan:base-packages: com.ruoyi.file.service
接着在启动类中加上 @EnableDubbo 注解
接着是dubbo的接口，接口放在这里
具体如下：
package com.ruoyi.system.api;import com.ruoyi.system.api.domain.SysFileInfo;
import org.springframework.web.multipart.MultipartFile;import java.util.List;/*** dubbo文件接口** @author：gan* @date: 2024-01-30 09:58*/
public interface DubboFileService {/*** 文件上传接口原始** @param file 上传的文件* @return 访问地址* @throws Exception*/String uploadFile(MultipartFile file) throws Exception;/*** 文件上传接口（自定义）** @param file 上传的文件* @param secondPath 文件二级路径* @return 访问地址* @throws Exception*/SysFileInfo upload(MultipartFile file, String secondPath) throws Exception;/*** 文件上传接口（自定义）** @param file 上传的文件* @return 访问地址* @throws Exception*/SysFileInfo upload(MultipartFile file) throws Exception;/*** 根据文件id查询文件* @param params* @return*/List<SysFileInfo> getSysFileInfoList(SysFileInfo params);
}
对应的实现类
package com.ruoyi.file.service;import com.ruoyi.system.api.DubboFileService;
import com.ruoyi.system.api.domain.SysFileInfo;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.web.multipart.MultipartFile;import javax.annotation.Resource;
import java.util.List;/*** dubbo文件服务** @author：gan* @date: 2024-02-21 17:53*/
@DubboService(version = "1.0.0")
public class DubboFileServiceImpl implements DubboFileService {@Resourceprivate IMinioSysFileService minioSysFileService;@Overridepublic String uploadFile(MultipartFile file) throws Exception {return minioSysFileService.uploadFile(file);}@Overridepublic SysFileInfo upload(MultipartFile file, String secondPath) throws Exception {return minioSysFileService.upload(file, secondPath);}@Overridepublic SysFileInfo upload(MultipartFile file) throws Exception {return minioSysFileService.upload(file);}@Overridepublic List<SysFileInfo> getSysFileInfoList(SysFileInfo params) {return minioSysFileService.getSysFileInfoList(params);}
}
其实要用的方法都在 IMinioSysFileService 的实现类中写好了，这里只是为了使用 @DubboService 注解。
然后启动文件服务
再查看nacos中的服务列表
可以看到生产者已经启动成功了。
3、消费者
在 ruoyi-modules 模块下新建了一个 名为 common-test 的模块作为消费者，依赖如下：
<?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"><parent><artifactId>ruoyi-modules</artifactId><groupId>com.ruoyi</groupId><version>3.6.3</version></parent><modelVersion>4.0.0</modelVersion><artifactId>common-test</artifactId><dependencies><!-- SpringCloud Alibaba Nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- SpringCloud Alibaba Nacos Config --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><!-- SpringCloud Alibaba Sentinel --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!-- SpringBoot Actuator --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- Swagger UI --><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger-ui</artifactId><version>${swagger.fox.version}</version></dependency><!-- Mysql Connector --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId></dependency><!-- RuoYi Api System --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-api-system</artifactId></dependency><!-- RuoYi Common DataSource --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId></dependency><!-- RuoYi Common DataScope --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId></dependency><!-- RuoYi Common Swagger --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId></dependency><!--这个依赖是整合dubbo时要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId></dependency></dependencies></project>
添加项目中的 bootstrap.yml 配置文件，具体内容如下：
# Tomcat
server:port: 9302# Spring
spring:application:# 应用名称name: common-testmain:allow-circular-references: true # 中断循环引用profiles:# 环境配置active: devcloud:nacos:discovery:# 服务注册地址server-addr: 127.0.0.1:8848config:# 配置中心地址server-addr: 127.0.0.1:8848# 配置文件格式file-extension: yml# 共享配置shared-configs:- application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}在nacos中添加名为 common-test-dev.yml 的配置，具体内容如下：
# spring配置
spring:servlet:multipart:maxFileSize: 30MBmaxRequestSize: 30MBdatasource:druid:stat-view-servlet:enabled: trueloginUsername: adminloginPassword: 123456dynamic:druid:initial-size: 5min-idle: 5maxActive: 20maxWait: 60000timeBetweenEvictionRunsMillis: 60000minEvictableIdleTimeMillis: 300000validationQuery: SELECT 1 FROM DUALtestWhileIdle: truetestOnBorrow: falsetestOnReturn: falsepoolPreparedStatements: truemaxPoolPreparedStatementPerConnectionSize: 20filters: stat,slf4jconnectionProperties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000connectTimeout: 1800000socketTimeout: 1800000datasource:# 主库数据源master:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/hr-cloud?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8username: rootpassword: 123456druid: # 配置数据库连接参数connectTimeout: 1800000socketTimeout: 1800000# mybatis配置
mybatis:# 搜索指定包别名typeAliasesPackage: com.common.test# 配置mapper的扫描，找到所有的mapper.xml映射文件mapperLocations: classpath:mapper/**/*.xmlconfiguration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl# dubbo相关配置
dubbo:protocol:name: dubbo # dubbo协议port: -1 # -1表示端口从20880开始递增，不会造成端口冲突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默认有启动检查retries: 0 # dubbo内置的重试机制
接着在服务启动类中加上 @EnableDubbo 注解
消费者的测试接口
package com.common.test.service;/*** 测试接口** @author：gan* @date: 2024-02-04 16:45*/
public interface CommonService {/*** 测试dubbo调用* @return*/Object testDubbo();
}接口实现类
package com.common.test.service.impl;import com.common.test.service.CommonService;
import com.ruoyi.system.api.DubboFileService;
import com.ruoyi.system.api.domain.SysFileInfo;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.stereotype.Service;import java.util.List;/*** 测试接口实现类** @author：gan* @date: 2024-02-04 16:47*/
@Service
public class CommonServiceImpl implements CommonService {@DubboReference(version = "1.0.0")private DubboFileService dubboFileService;@Overridepublic Object testDubbo() {SysFileInfo selectSysFileInfoParams = new SysFileInfo();selectSysFileInfoParams.setFileId("1752583940597551104");List<SysFileInfo> sysFileInfoList = dubboFileService.getSysFileInfoList(selectSysFileInfoParams);System.out.println(sysFileInfoList.get(0));return sysFileInfoList.get(0);}
}测试前端控制器
package com.common.test.controller;import com.common.test.service.CommonService;
import com.ruoyi.common.core.web.domain.AjaxResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;/*** 测试controller** @author：gan* @date: 2024-02-04 16:48*/
@RestController
@RequestMapping("/test")
public class CommonController {@Resourceprivate CommonService commonService;@GetMapping("/testDubbo")public AjaxResult test() {AjaxResult result = null;try {result = AjaxResult.success(commonService.testDubbo());} catch (Exception e) {e.printStackTrace();result = AjaxResult.error(e.getMessage());} finally {return result;}}
}然后启动测试服务
再查看服务列表
可以看到消费者也启动成功了。
这里只是测试，就不需要用token了，在 ruoyi-gateway 的配置文件中加上如下配置：
重启 ruoyi-gateway 服务，再进行接口测试
三、修改若依的服务调用方式为dubbo
在开始之前，先给小伙伴们打个预防针，改造的过程会比较麻烦，这里以依赖冲突为最，若是对dubbo、若依不够熟悉或者怕麻烦的就跳过这一块。这里放个局部修改图：
看到这里如果没有跳过，那就开始吧。
1、改造系统模块
先引入依赖，父依赖和前面的父依赖一样，这里是处理系统模块的依赖，添加如下依赖：
<!-- Dubbo -->
<!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo -->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency><!--这个依赖是整合dubbo时要用到的-->
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId>
</dependency>
然后排除掉 openfeign 的依赖，去掉若依自带的日志模块：
如果没有排掉，启动服务时会报 openfeign 和 dubbo 的依赖冲突的错。去掉日志模块是因为日志中也使用了 openfeign 。
完整依赖如下：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://maven.apache.org/POM/4.0.0"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><groupId>com.ruoyi</groupId><artifactId>ruoyi-modules</artifactId><version>3.6.3</version></parent><modelVersion>4.0.0</modelVersion><artifactId>ruoyi-modules-system</artifactId><description>ruoyi-modules-system系统模块</description><dependencies><!-- SpringCloud Alibaba Nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- SpringCloud Alibaba Nacos Config --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><!-- SpringCloud Alibaba Sentinel --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!-- SpringBoot Actuator --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- Swagger UI --><dependency><groupId>io.springfox</groupId><artifactId>springfox-swagger-ui</artifactId><version>${swagger.fox.version}</version></dependency><!-- Mysql Connector --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId></dependency><!-- RuoYi Common DataSource --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId></dependency><!-- RuoYi Common DataScope --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId><exclusions><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-core</artifactId></exclusion><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-slf4j</artifactId></exclusion></exclusions></dependency><!-- <!– RuoYi Common Log –>-->
<!-- <dependency>-->
<!-- <groupId>com.ruoyi</groupId>-->
<!-- <artifactId>ruoyi-common-log</artifactId>-->
<!-- </dependency>--><!-- RuoYi Common Swagger --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId></dependency><!-- hutool工具包--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId></dependency><!--这个依赖是整合dubbo时要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId></dependency></dependencies><build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>
然后在启动类中去掉 openfeign 的注解，再加上 dubbo 的注解
然后在 nacos 中系统模块的配置文件中加上 dubbo 的相关配置
# dubbo相关配置
dubbo:protocol:name: dubbo # dubbo协议port: -1 # -1表示端口从20880开始递增，不会造成端口冲突registry:address: nacos://127.0.0.1:8848# check: false # dubbo默认有启动检查scan:base-packages: com.ruoyi.system.service
去掉日志模块再起编译时系统模块的前端控制器应该都会报错，需要把报错的地方注释掉或者去掉，我这里以参数管理的前端控制器为例：
完成了这些系统模块应该能正常启动了。
2、改造认证授权中心
但还没结束，启动系统模块后使用默认的 admin 登录，我们会发现报错 admin 不存在。
查找原因：
一开始以为是 admin 账号误删了，看了一下数据库发现账号还在，看了一下控制台，发现是认证授权中心的 SysLoginService
类中报错了，原来是 SysLoginService 这个类使用了系统接口模块的 RemoteUserService 中的
getUserInfo 方法，也就是使用了 openfeign ，用来调用系统模块的根据用户名查询用户接口，虽然认证授权中心中还存在 openfeign 依赖，但是系统模块的已被排除了，自然就报错了。
解决办法：
注释或者去掉认证授权中心 openfeign 相关的使用，以 dubbo 代之。
同样，先处理依赖的问题，经过观察，发现认证授权中心的 openfeign 相关的依赖在如下依赖中，做出排除
然后加上 dubbo 相关的依赖：
<!-- Dubbo -->
<!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo -->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency><!--这个依赖是整合dubbo时要用到的-->
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId>
</dependency>
完整依赖如下：
<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"><parent><groupId>com.ruoyi</groupId><artifactId>ruoyi</artifactId><version>3.6.3</version></parent><modelVersion>4.0.0</modelVersion><artifactId>ruoyi-auth</artifactId><description>ruoyi-auth认证授权中心</description><dependencies><!-- SpringCloud Alibaba Nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- SpringCloud Alibaba Nacos Config --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId></dependency><!-- SpringCloud Alibaba Sentinel --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId></dependency><!-- SpringBoot Web --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- SpringBoot Actuator --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- RuoYi Common Security--><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-security</artifactId><exclusions><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-core</artifactId></exclusion><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-slf4j</artifactId></exclusion></exclusions></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId></dependency><!--这个依赖是整合dubbo时要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId></dependency></dependencies><build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>
然后在 nacos 中认证授权中心的配置文件中加上如下配置：
# dubbo相关配置
dubbo:protocol:name: dubbo # dubbo协议port: -1 # -1表示端口从20880开始递增，不会造成端口冲突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默认有启动检查retries: 0 # dubbo内置的重试机制
接着在启动类中去掉 openfeign 的注解，再加上 dubbo 的注解
然后用 dubbo 的方式写一个接口，以用户服务 RemoteUserService 为例，写一个对应的 DubboUserService 用来替换用户服务 RemoteUserService
完整代码如下：
package com.ruoyi.system.api;import com.ruoyi.system.api.domain.SysUser;
import com.ruoyi.system.api.model.LoginUser;/*** dubbo用户服务** @author：gan* @date: 2024-02-28 10:36*/
public interface DubboUserService {/*** 通过用户名查询用户信息* @param username 用户名* @return*/public LoginUser getUserInfo(String username);/*** 注册用户信息** @param sysUser 用户信息* @return 结果*/public Boolean registerUserInfo(SysUser sysUser);
}
其实现类就放在系统模块的包下，完整代码如下：
package com.ruoyi.system.service.impl;import com.ruoyi.common.core.utils.VerifyUtil;
import com.ruoyi.system.api.DubboUserService;
import com.ruoyi.system.api.domain.SysUser;
import com.ruoyi.system.api.model.LoginUser;
import com.ruoyi.system.mapper.SysUserMapper;
import com.ruoyi.system.service.ISysConfigService;
import com.ruoyi.system.service.ISysPermissionService;
import org.apache.dubbo.config.annotation.DubboService;import javax.annotation.Resource;/*** dubbo用户服务 业务处理层** @author：gan* @date: 2024-02-28 10:41*/
@DubboService(version = "1.0.0")
public class DubboUserServiceImpl implements DubboUserService {@Resourceprivate SysUserMapper sysUserMapper;@Resourceprivate ISysPermissionService permissionService;@Resourceprivate ISysConfigService configService;@Overridepublic LoginUser getUserInfo(String username) {SysUser sysUser = sysUserMapper.selectUserByUserName(username);VerifyUtil.checkParam(sysUser, "用户名或密码错误！");LoginUser sysUserVo = new LoginUser();sysUserVo.setSysUser(sysUser);sysUserVo.setRoles(permissionService.getRolePermission(sysUser)); // 角色集合sysUserVo.setPermissions(permissionService.getMenuPermission(sysUser)); // 权限集合return sysUserVo;}@Overridepublic Boolean registerUserInfo(SysUser sysUser) {configService.selectConfigByKey("sys.account.registerUser");if (!Boolean.TRUE.equals(configService.selectConfigByKey("sys.account.registerUser"))) {throw new RuntimeException("当前系统没有开启注册功能！");}String username = sysUser.getUserName();VerifyUtil.checkParam(sysUserMapper.checkUserNameUnique(username), "保存用户'" + username + "'失败，注册账号已存在！");return sysUserMapper.insertUser(sysUser) > 0;}
}其中 VerifyUtil 是自己写的判空工具类，可以用自己的方式判空。
接着在 SysLoginService 类中注释掉用户服务 RemoteUserService 相关的逻辑，再以dubbo用户服务 DubboUserService 代之：
日志服务 RemoteLogService 也是同理。改造完成，再成功启动后就可以登录了。
这里贴一下我的日志服务代码
完整代码如下：
package com.ruoyi.system.api;import com.ruoyi.system.api.domain.SysLogininfor;
import com.ruoyi.system.api.domain.SysOperLog;/*** dubbo日志服务** @author：gan* @date: 2024-02-28 11:21*/
public interface DubboLogService {/*** 保存系统日志** @param sysOperLog 日志实体* @return 结果*/public Boolean saveLog(SysOperLog sysOperLog);/*** 保存访问记录** @param sysLogininfor 访问实体* @return 结果*/public Boolean saveLogininfor(SysLogininfor sysLogininfor);
}
对应实现类也在系统模块
package com.ruoyi.system.service.impl;import com.ruoyi.system.api.DubboLogService;
import com.ruoyi.system.api.domain.SysLogininfor;
import com.ruoyi.system.api.domain.SysOperLog;
import com.ruoyi.system.mapper.SysLogininforMapper;
import com.ruoyi.system.mapper.SysOperLogMapper;
import org.apache.dubbo.config.annotation.DubboService;import javax.annotation.Resource;/*** dubbo日志服务 服务层处理** @author：gan* @date: 2024-02-28 11:24*/
@DubboService(version = "1.0.0")
public class DubboLogServiceImpl implements DubboLogService {@Resourceprivate SysOperLogMapper operLogMapper;@Resourceprivate SysLogininforMapper logininforMapper;@Overridepublic Boolean saveLog(SysOperLog sysOperLog) {return operLogMapper.insertOperlog(sysOperLog) > 0;}@Overridepublic Boolean saveLogininfor(SysLogininfor sysLogininfor) {return logininforMapper.insertLogininfor(sysLogininfor) > 0;}
}
以dubbo日志服务替换掉 SysRecordLogService 类中的日志服务
四、整合过程遇到的问题
1、出现循环引用
我想着文件模块整合dubbo，引入依赖、加上注解之后报错如下：
***************************
APPLICATION FAILED TO START
***************************Description:The dependencies of some of the beans in the application context form a cycle:targeterBeanPostProcessor defined in class path resource [com/alibaba/cloud/dubbo/autoconfigure/DubboOpenFeignAutoConfiguration.class]↓com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository (field private com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.dubboMetadataConfigServiceProxy)↓com.alibaba.cloud.dubbo.service.DubboMetadataServiceProxy
┌─────┐
| com.alibaba.cloud.dubbo.autoconfigure.DubboMetadataAutoConfiguration (field private com.alibaba.cloud.dubbo.metadata.resolver.MetadataResolver com.alibaba.cloud.dubbo.autoconfigure.DubboMetadataAutoConfiguration.metadataResolver)
└─────┘Action:Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.
虽然他已经提示要加上配置：
# Spring
spring:main:allow-circular-references: true # 中断循环引用
但是我nacos的配置中加上之后没有效果
重启还是报那个错。
应该在对应模块的 bookstrap.yml 文件中加配置
再次重启
看来配置生效了，再看看nacos中有没有dubbo中的服务
2、出现依赖冲突
我想要在系统模块中使用 dubbo ，但引入 dubbo 相关依赖：
<!-- Dubbo -->
<!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo -->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>
报错如下：
***************************
APPLICATION FAILED TO START
***************************Description:An attempt was made to call a method that does not exist. The attempt was made from the following location:com.alibaba.cloud.dubbo.metadata.RestMethodMetadata.<init>(RestMethodMetadata.java:80)The following method did not exist:feign.MethodMetadata.queryMapEncoded()ZThe calling method's class, com.alibaba.cloud.dubbo.metadata.RestMethodMetadata, was loaded from the following location:jar:file:/D:/environment/Maven/apache-maven-3.6.0/repository/com/alibaba/cloud/spring-cloud-starter-dubbo/2021.0.1.0/spring-cloud-starter-dubbo-2021.0.1.0.jar!/com/alibaba/cloud/dubbo/metadata/RestMethodMetadata.classThe called method's class, feign.MethodMetadata, is available from the following locations:jar:file:/D:/environment/Maven/apache-maven-3.6.0/repository/io/github/openfeign/feign-core/11.10/feign-core-11.10.jar!/feign/MethodMetadata.classThe called method's class hierarchy was loaded from the following locations:feign.MethodMetadata: file:/D:/environment/Maven/apache-maven-3.6.0/repository/io/github/openfeign/feign-core/11.10/feign-core-11.10.jarAction:Correct the classpath of your application so that it contains compatible versions of the classes com.alibaba.cloud.dubbo.metadata.RestMethodMetadata and feign.MethodMetadata
原来系统模块使用了 openfeign 进行服务调用，引入 dubbo 相关的依赖后就依赖冲突了，可以排除系统模块中的 openfeign 依赖或者移除 dubbo 依赖，我这里选择了前者
3、启动出现端口号被占用
生产者已经启动，消费者启动时报错：
java.lang.IllegalStateException: Failed to execute CommandLineRunnerat org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:771)at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:752)at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292)at com.common.test.CommonTestApplication.main(CommonTestApplication.java:19)
Caused by: org.apache.dubbo.rpc.RpcException: Fail to start server(url: dubbo://192.168.1.12:20880/com.alibaba.cloud.dubbo.service.DubboMetadataService?anyhost=true&application=common-test&bind.ip=192.168.1.12&bind.port=20880&channel.readonly.sent=true&codec=dubbo&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&group=common-test&heartbeat=60000&interface=com.alibaba.cloud.dubbo.service.DubboMetadataService&metadata-type=remote&methods=getAllServiceKeys,getServiceRestMetadata,getExportedURLs,getAllExportedURLs&pid=27496&qos.enable=false&release=2.7.15&revision=2021.0.1.0&service.name=ServiceBean:common-test/com.alibaba.cloud.dubbo.service.DubboMetadataService:1.0.0&side=provider×tamp=1708501506423&version=1.0.0) Failed to bind NettyServer on /192.168.1.12:20880, cause: Address already in use: bindat org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:350)at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.openServer(DubboProtocol.java:322)at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:305)at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:64)at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:75)at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:66)at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)at org.apache.dubbo.registry.integration.RegistryProtocol.lambda$doLocalExport$2(RegistryProtocol.java:262)at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)at org.apache.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:260)at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:212)at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:62)at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:73)at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:64)at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:518)at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:339)at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:314)at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:238)at com.alibaba.cloud.dubbo.service.DubboMetadataServiceExporter.export(DubboMetadataServiceExporter.java:82)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.getDubboMetadataServiceMetadata(DubboServiceMetadataRepository.java:288)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$1.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$1.getDubboMetadataServiceMetadata(<generated>)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.attachDubboMetadataServiceMetadata(DubboServiceRegistrationAutoConfiguration.java:172)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.attachDubboMetadataServiceMetadata(DubboServiceRegistrationAutoConfiguration.java:166)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.lambda$null$0(DubboServiceRegistrationAutoConfiguration.java:131)at java.lang.Iterable.forEach(Iterable.java:75)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.lambda$onDubboBootstrapStarted$1(DubboServiceRegistrationAutoConfiguration.java:130)at java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1597)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.onDubboBootstrapStarted(DubboServiceRegistrationAutoConfiguration.java:129)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:344)at org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:229)at org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:166)at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378)at com.alibaba.cloud.dubbo.bootstrap.DubboBootstrapStartCommandLineRunner.run(DubboBootstrapStartCommandLineRunner.java:46)at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:768)... 5 common frames omitted
Caused by: org.apache.dubbo.remoting.RemotingException: Failed to bind NettyServer on /192.168.1.12:20880, cause: Address already in use: bindat org.apache.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:73)at org.apache.dubbo.remoting.transport.netty4.NettyServer.<init>(NettyServer.java:79)at org.apache.dubbo.remoting.transport.netty4.NettyTransporter.bind(NettyTransporter.java:35)at org.apache.dubbo.remoting.Transporter$Adaptive.bind(Transporter$Adaptive.java)at org.apache.dubbo.remoting.Transporters.bind(Transporters.java:56)at org.apache.dubbo.remoting.exchange.support.header.HeaderExchanger.bind(HeaderExchanger.java:44)at org.apache.dubbo.remoting.exchange.Exchangers.bind(Exchangers.java:70)at org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:348)... 56 common frames omitted
Caused by: java.net.BindException: Address already in use: bindat sun.nio.ch.Net.bind0(Native Method)at sun.nio.ch.Net.bind(Net.java:433)at sun.nio.ch.Net.bind(Net.java:425)at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:141)at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:562)at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1334)at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:600)at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:579)at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:973)at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:260)at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:356)at io.netty.util.concurrent.AbstractEventExecutor.runTask$$$capture(AbstractEventExecutor.java:174)at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java)at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:167)at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java)at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)at java.lang.Thread.run(Thread.java:748)
原因：
这是因为生产者启动时，20880这个端口被占用，消费者尝试使用20880端口启动就报错了
报错日志中也提到了
可以在配置文件中加入指定端口号或者使用端口号递增，这里选择后者。
# dubbo相关配置
dubbo:protocol:name: dubbo # dubbo协议port: -1 # -1表示端口从20880开始递增，不会造成端口冲突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默认有启动检查retries: 0 # dubbo内置的重试机制
4、出现某个类找不到
就是模块启动时报错：Caused by: java.lang.ClassNotFoundException
java.lang.IllegalStateException: Failed to execute CommandLineRunnerat org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:771)at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:752)at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292)at com.common.test.CommonTestApplication.main(CommonTestApplication.java:19)
Caused by: java.lang.reflect.UndeclaredThrowableException: Failed to invoke event listener method
HandlerMethod details:
Bean [com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration]
Method [public void com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.onDubboBootstrapStarted(com.alibaba.cloud.dubbo.bootstrap.event.DubboBootstrapStartedEvent)]
Resolved arguments:
[0] [type=com.alibaba.cloud.dubbo.bootstrap.event.DubboBootstrapStartedEvent] [value=com.alibaba.cloud.dubbo.bootstrap.event.DubboBootstrapStartedEvent[source=com.alibaba.cloud.dubbo.bootstrap.DubboBootstrapWrapper@30afac00]]at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:361)at org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:229)at org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:166)at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421)at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378)at com.alibaba.cloud.dubbo.bootstrap.DubboBootstrapStartCommandLineRunner.run(DubboBootstrapStartCommandLineRunner.java:46)at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:768)... 5 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Mapsat org.apache.dubbo.registry.nacos.util.NacosInstanceManageUtil.<clinit>(NacosInstanceManageUtil.java:39)at org.apache.dubbo.registry.nacos.NacosRegistry.doSubscribe(NacosRegistry.java:187)at org.apache.dubbo.registry.support.FailbackRegistry.subscribe(FailbackRegistry.java:299)at org.apache.dubbo.registry.ListenerRegistryWrapper.subscribe(ListenerRegistryWrapper.java:105)at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:232)at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:62)at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:73)at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:64)at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:518)at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:339)at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:314)at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:238)at com.alibaba.cloud.dubbo.service.DubboMetadataServiceExporter.export(DubboMetadataServiceExporter.java:82)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository.getDubboMetadataServiceMetadata(DubboServiceMetadataRepository.java:288)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$FastClassBySpringCGLIB$$1.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository$$EnhancerBySpringCGLIB$$1.getDubboMetadataServiceMetadata(<generated>)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.attachDubboMetadataServiceMetadata(DubboServiceRegistrationAutoConfiguration.java:172)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.attachDubboMetadataServiceMetadata(DubboServiceRegistrationAutoConfiguration.java:166)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.lambda$null$0(DubboServiceRegistrationAutoConfiguration.java:131)at java.lang.Iterable.forEach(Iterable.java:75)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.lambda$onDubboBootstrapStarted$1(DubboServiceRegistrationAutoConfiguration.java:130)at java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1597)at com.alibaba.cloud.dubbo.autoconfigure.DubboServiceRegistrationAutoConfiguration.onDubboBootstrapStarted(DubboServiceRegistrationAutoConfiguration.java:129)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:344)... 14 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Mapsat java.net.URLClassLoader.findClass(URLClassLoader.java:382)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)... 51 common frames omitted
一开始想着是不是dubbo的版本的问题，但生产者都已经启动成功了，而且用的还是同一个依赖，就想着加一下这个类的依赖看看能不能解决，依赖如下：
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>33.0.0-jre</version>
</dependency>
果然启动成功了。
但也纳闷，为什么同样的dubbo依赖，生产者那边就可以，到了消费者这边就不行了？
既然dubbo依赖是相同的，那肯定就是其他依赖的问题，于是对比了其他依赖，最终发现minio的依赖下包含 com.google.guava 依赖
那就注释掉 com.google.guava 依赖，加入 minio 依赖试试，结果发现也能启动成功…
太难了，就这个问题折腾了好久（大哭）
5、找不到生产者
生产者和消费者都启动了，但是消费者调用生产者服务时报如下错：
org.apache.dubbo.rpc.RpcException: No provider available from registry 127.0.0.1:8848 for service com.ruoyi.system.api.DubboFileService:1.0.0 on consumer 192.168.1.12 use dubbo version 2.7.15, please check status of providers(disabled, not registered or in blacklist).at org.apache.dubbo.registry.integration.DynamicDirectory.doList(DynamicDirectory.java:168)at org.apache.dubbo.rpc.cluster.directory.AbstractDirectory.list(AbstractDirectory.java:99)at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.list(AbstractClusterInvoker.java:297)at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:262)at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47)at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92)at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:98)at org.apache.dubbo.registry.client.migration.MigrationInvoker.invoke(MigrationInvoker.java:170)at org.apache.dubbo.rpc.cluster.support.registry.ZoneAwareClusterInvoker.doInvoke(ZoneAwareClusterInvoker.java:112)at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:265)at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47)at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92)at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:96)at org.apache.dubbo.common.bytecode.proxy0.getSysFileInfoList(proxy0.java)at com.common.test.service.impl.CommonServiceImpl.testDubbo(CommonServiceImpl.java:27)at com.common.test.controller.CommonController.test(CommonController.java:28)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)at javax.servlet.http.HttpServlet.service(HttpServlet.java:645)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:90)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:41002)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:390)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:926)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1791)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)
分析原因：
我的生产者是若依的文件服务，若依的文件服务原来是用 Feign 进行远程调用的，我只是想把 Feign 改为 dubbo ，就定义了一个和原文件接口相同抽象方法的接口，其实就是接口名不一样，再用文件实现类去实现，这样我就不用重新写方法了，具体如下：
因为启动没报错，nacos中也有看到对应的服务，就没有多想，就是会一直报这个错，后面就想着单独见一个类加上 @DubboService(version = “1.0.0”) 试试
结果就调用成功了…
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