在微服務整合dubbo，以為微服務版的若依為例
- 一、環境
- 二、整合過程
- 1、父模塊依賴
- 2、生產者
- 3、消費者
- 三、修改若依的服務調用方式為dubbo
- 1、改造系統模塊
- 2、改造認證授權中心
- 四、整合過程遇到的問題
- 1、出現循環引用
- 2、出現依賴沖突
- 3、啟動出現端口號被占用
- 4、出現某個類找不到
- 5、找不到生產者
一、環境
微服務版若依3.6.3
dubbo2021.0.1
nacos2.2.1
二、整合過程
1、父模塊依賴
<?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>若依管理系統</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><!-- 依賴聲明 --><dependencyManagement><dependencies><!-- SpringCloud 微服務 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringCloud Alibaba 微服務 --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>${spring-cloud-alibaba.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringBoot 依賴配置 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency><!-- FastDFS 分布式文件系統 --><dependency><groupId>com.github.tobato</groupId><artifactId>fastdfs-client</artifactId><version>${tobato.version}</version></dependency><!-- Swagger 依賴配置 --><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><!-- 驗證碼 --><dependency><groupId>pro.fessional</groupId><artifactId>kaptcha</artifactId><version>${kaptcha.version}</version></dependency><!-- pagehelper 分頁插件 --><dependency><groupId>com.github.pagehelper</groupId><artifactId>pagehelper-spring-boot-starter</artifactId><version>${pagehelper.boot.version}</version></dependency><!-- io常用工具類 --><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><!-- 代碼生成使用模板 --><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>${jjwt.version}</version></dependency><!-- 線程傳遞值 --><dependency><groupId>com.alibaba</groupId><artifactId>transmittable-thread-local</artifactId><version>${transmittable-thread-local.version}</version></dependency><!-- 核心模塊 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-core</artifactId><version>${ruoyi.version}</version></dependency><!-- 接口模塊 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId><version>${ruoyi.version}</version></dependency><!-- 安全模塊 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-security</artifactId><version>${ruoyi.version}</version></dependency><!-- 權限范圍 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId><version>${ruoyi.version}</version></dependency><!-- 多數據源 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId><version>${ruoyi.version}</version></dependency><!-- 分布式事務 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-seata</artifactId><version>${ruoyi.version}</version></dependency><!-- 日志記錄 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-log</artifactId><version>${ruoyi.version}</version></dependency><!-- 緩存服務 --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-redis</artifactId><version>${ruoyi.version}</version></dependency><!-- 系統接口 --><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工具類--><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>${minio.version}</version></dependency><!--這個依賴是整合dubbo時要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>${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 啟動器 --><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、生產者
因為我要調用若依的文件服務，所以直接將文件服務作為生產者。依賴如下：
<?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文件服務</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工具類--><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>${project.artifactId}</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>主要是這個依賴
<!-- Dubbo -->
<!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo -->
<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId><version>2021.0.1.0</version>
</dependency>
先在文件服務的 bootstrap.yml 加上如下配置，解決循環引用
# Tomcat
server:port: 9300# Spring
spring:application:# 應用名稱name: ruoyi-filemain:allow-circular-references: true # 中斷循環引用profiles:# 環境配置active: devcloud:nacos:discovery:# 服務注冊地址server-addr: 127.0.0.1:8848config:# 配置中心地址server-addr: 127.0.0.1:8848# 配置文件格式file-extension: yml# 共享配置shared-configs:- application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}如何在nacos中對應的配置文件中添加如下配置：
# dubbo相關配置
dubbo:protocol:name: dubbo # dubbo協議port: -1 # -1表示端口從20880開始遞增，不會造成端口沖突registry:address: nacos://127.0.0.1:8848# check: false # dubbo默認有啟動檢查scan:base-packages: com.ruoyi.file.service
接著在啟動類中加上 @EnableDubbo 注解
接著是dubbo的接口，接口放在這里
具體如下：
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 {/*** 文件上傳接口原始** @param file 上傳的文件* @return 訪問地址* @throws Exception*/String uploadFile(MultipartFile file) throws Exception;/*** 文件上傳接口（自定義）** @param file 上傳的文件* @param secondPath 文件二級路徑* @return 訪問地址* @throws Exception*/SysFileInfo upload(MultipartFile file, String secondPath) throws Exception;/*** 文件上傳接口（自定義）** @param file 上傳的文件* @return 訪問地址* @throws Exception*/SysFileInfo upload(MultipartFile file) throws Exception;/*** 根據文件id查詢文件* @param params* @return*/List<SysFileInfo> getSysFileInfoList(SysFileInfo params);
}
對應的實現類
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文件服務** @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);}
}
其實要用的方法都在 IMinioSysFileService 的實現類中寫好了，這里只是為了使用 @DubboService 注解。
然后啟動文件服務
再查看nacos中的服務列表
可以看到生產者已經啟動成功了。
3、消費者
在 ruoyi-modules 模塊下新建了一個 名為 common-test 的模塊作為消費者，依賴如下：
<?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><!--這個依賴是整合dubbo時要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId></dependency></dependencies></project>
添加項目中的 bootstrap.yml 配置文件，具體內容如下：
# Tomcat
server:port: 9302# Spring
spring:application:# 應用名稱name: common-testmain:allow-circular-references: true # 中斷循環引用profiles:# 環境配置active: devcloud:nacos:discovery:# 服務注冊地址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中添加名為 common-test-dev.yml 的配置，具體內容如下：
# 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:# 主庫數據源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: # 配置數據庫連接參數connectTimeout: 1800000socketTimeout: 1800000# mybatis配置
mybatis:# 搜索指定包別名typeAliasesPackage: com.common.test# 配置mapper的掃描，找到所有的mapper.xml映射文件mapperLocations: classpath:mapper/**/*.xmlconfiguration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl# dubbo相關配置
dubbo:protocol:name: dubbo # dubbo協議port: -1 # -1表示端口從20880開始遞增，不會造成端口沖突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默認有啟動檢查retries: 0 # dubbo內置的重試機制
接著在服務啟動類中加上 @EnableDubbo 注解
消費者的測試接口
package com.common.test.service;/*** 測試接口** @author：gan* @date: 2024-02-04 16:45*/
public interface CommonService {/*** 測試dubbo調用* @return*/Object testDubbo();
}接口實現類
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;/*** 測試接口實現類** @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);}
}測試前端控制器
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;/*** 測試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;}}
}然后啟動測試服務
再查看服務列表
可以看到消費者也啟動成功了。
這里只是測試，就不需要用token了，在 ruoyi-gateway 的配置文件中加上如下配置：
重啟 ruoyi-gateway 服務，再進行接口測試
三、修改若依的服務調用方式為dubbo
在開始之前，先給小伙伴們打個預防針，改造的過程會比較麻煩，這里以依賴沖突為最，若是對dubbo、若依不夠熟悉或者怕麻煩的就跳過這一塊。這里放個局部修改圖：
看到這里如果沒有跳過，那就開始吧。
1、改造系統模塊
先引入依賴，父依賴和前面的父依賴一樣，這里是處理系統模塊的依賴，添加如下依賴：
<!-- 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><!--這個依賴是整合dubbo時要用到的-->
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId>
</dependency>
然后排除掉 openfeign 的依賴，去掉若依自帶的日志模塊：
如果沒有排掉，啟動服務時會報 openfeign 和 dubbo 的依賴沖突的錯。去掉日志模塊是因為日志中也使用了 openfeign 。
完整依賴如下：
<?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系統模塊</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>${swagger.fox.version}</version></dependency><!-- Mysql Connector --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId></dependency><!-- RuoYi Common DataSource --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datasource</artifactId></dependency><!-- RuoYi Common DataScope --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-datascope</artifactId><exclusions><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-core</artifactId></exclusion><exclusion><groupId>io.github.openfeign</groupId><artifactId>feign-slf4j</artifactId></exclusion></exclusions></dependency><!-- <!– RuoYi Common Log –>-->
<!-- <dependency>-->
<!-- <groupId>com.ruoyi</groupId>-->
<!-- <artifactId>ruoyi-common-log</artifactId>-->
<!-- </dependency>--><!-- RuoYi Common Swagger --><dependency><groupId>com.ruoyi</groupId><artifactId>ruoyi-common-swagger</artifactId></dependency><!-- hutool工具包--><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId></dependency><!-- Dubbo --><!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-dubbo --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-dubbo</artifactId></dependency><!--這個依賴是整合dubbo時要用到的--><!-- https://mvnrepository.com/artifact/com.google.guava/guava --><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId></dependency></dependencies><build><finalName>${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>
然后在啟動類中去掉 openfeign 的注解，再加上 dubbo 的注解
然后在 nacos 中系統模塊的配置文件中加上 dubbo 的相關配置
# dubbo相關配置
dubbo:protocol:name: dubbo # dubbo協議port: -1 # -1表示端口從20880開始遞增，不會造成端口沖突registry:address: nacos://127.0.0.1:8848# check: false # dubbo默認有啟動檢查scan:base-packages: com.ruoyi.system.service
去掉日志模塊再起編譯時系統模塊的前端控制器應該都會報錯，需要把報錯的地方注釋掉或者去掉，我這里以參數管理的前端控制器為例：
完成了這些系統模塊應該能正常啟動了。
2、改造認證授權中心
但還沒結束，啟動系統模塊后使用默認的 admin 登錄，我們會發現報錯 admin 不存在。
查找原因：
一開始以為是 admin 賬號誤刪了，看了一下數據庫發現賬號還在，看了一下控制臺，發現是認證授權中心的 SysLoginService
類中報錯了，原來是 SysLoginService 這個類使用了系統接口模塊的 RemoteUserService 中的
getUserInfo 方法，也就是使用了 openfeign ，用來調用系統模塊的根據用戶名查詢用戶接口，雖然認證授權中心中還存在 openfeign 依賴，但是系統模塊的已被排除了，自然就報錯了。
解決辦法：
注釋或者去掉認證授權中心 openfeign 相關的使用，以 dubbo 代之。
同樣，先處理依賴的問題，經過觀察，發現認證授權中心的 openfeign 相關的依賴在如下依賴中，做出排除
然后加上 dubbo 相關的依賴：
<!-- 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><!--這個依賴是整合dubbo時要用到的-->
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId>
</dependency>
完整依賴如下：
<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認證授權中心</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><!--這個依賴是整合dubbo時要用到的--><!-- 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 中認證授權中心的配置文件中加上如下配置：
# dubbo相關配置
dubbo:protocol:name: dubbo # dubbo協議port: -1 # -1表示端口從20880開始遞增，不會造成端口沖突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默認有啟動檢查retries: 0 # dubbo內置的重試機制
接著在啟動類中去掉 openfeign 的注解，再加上 dubbo 的注解
然后用 dubbo 的方式寫一個接口，以用戶服務 RemoteUserService 為例，寫一個對應的 DubboUserService 用來替換用戶服務 RemoteUserService
完整代碼如下：
package com.ruoyi.system.api;import com.ruoyi.system.api.domain.SysUser;
import com.ruoyi.system.api.model.LoginUser;/*** dubbo用戶服務** @author：gan* @date: 2024-02-28 10:36*/
public interface DubboUserService {/*** 通過用戶名查詢用戶信息* @param username 用戶名* @return*/public LoginUser getUserInfo(String username);/*** 注冊用戶信息** @param sysUser 用戶信息* @return 結果*/public Boolean registerUserInfo(SysUser sysUser);
}
其實現類就放在系統模塊的包下，完整代碼如下：
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用戶服務 業務處理層** @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, "用戶名或密碼錯誤！");LoginUser sysUserVo = new LoginUser();sysUserVo.setSysUser(sysUser);sysUserVo.setRoles(permissionService.getRolePermission(sysUser)); // 角色集合sysUserVo.setPermissions(permissionService.getMenuPermission(sysUser)); // 權限集合return sysUserVo;}@Overridepublic Boolean registerUserInfo(SysUser sysUser) {configService.selectConfigByKey("sys.account.registerUser");if (!Boolean.TRUE.equals(configService.selectConfigByKey("sys.account.registerUser"))) {throw new RuntimeException("當前系統沒有開啟注冊功能！");}String username = sysUser.getUserName();VerifyUtil.checkParam(sysUserMapper.checkUserNameUnique(username), "保存用戶'" + username + "'失敗，注冊賬號已存在！");return sysUserMapper.insertUser(sysUser) > 0;}
}其中 VerifyUtil 是自己寫的判空工具類，可以用自己的方式判空。
接著在 SysLoginService 類中注釋掉用戶服務 RemoteUserService 相關的邏輯，再以dubbo用戶服務 DubboUserService 代之：
日志服務 RemoteLogService 也是同理。改造完成，再成功啟動后就可以登錄了。
這里貼一下我的日志服務代碼
完整代碼如下：
package com.ruoyi.system.api;import com.ruoyi.system.api.domain.SysLogininfor;
import com.ruoyi.system.api.domain.SysOperLog;/*** dubbo日志服務** @author：gan* @date: 2024-02-28 11:21*/
public interface DubboLogService {/*** 保存系統日志** @param sysOperLog 日志實體* @return 結果*/public Boolean saveLog(SysOperLog sysOperLog);/*** 保存訪問記錄** @param sysLogininfor 訪問實體* @return 結果*/public Boolean saveLogininfor(SysLogininfor sysLogininfor);
}
對應實現類也在系統模塊
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日志服務 服務層處理** @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日志服務替換掉 SysRecordLogService 類中的日志服務
四、整合過程遇到的問題
1、出現循環引用
我想著文件模塊整合dubbo，引入依賴、加上注解之后報錯如下：
***************************
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.
雖然他已經提示要加上配置：
# Spring
spring:main:allow-circular-references: true # 中斷循環引用
但是我nacos的配置中加上之后沒有效果
重啟還是報那個錯。
應該在對應模塊的 bookstrap.yml 文件中加配置
再次重啟
看來配置生效了，再看看nacos中有沒有dubbo中的服務
2、出現依賴沖突
我想要在系統模塊中使用 dubbo ，但引入 dubbo 相關依賴：
<!-- 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>
報錯如下：
***************************
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
原來系統模塊使用了 openfeign 進行服務調用，引入 dubbo 相關的依賴后就依賴沖突了，可以排除系統模塊中的 openfeign 依賴或者移除 dubbo 依賴，我這里選擇了前者
3、啟動出現端口號被占用
生產者已經啟動，消費者啟動時報錯：
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：
這是因為生產者啟動時，20880這個端口被占用，消費者嘗試使用20880端口啟動就報錯了
報錯日志中也提到了
可以在配置文件中加入指定端口號或者使用端口號遞增，這里選擇后者。
# dubbo相關配置
dubbo:protocol:name: dubbo # dubbo協議port: -1 # -1表示端口從20880開始遞增，不會造成端口沖突registry:address: nacos://127.0.0.1:8848consumer:check: false # dubbo默認有啟動檢查retries: 0 # dubbo內置的重試機制
4、出現某個類找不到
就是模塊啟動時報錯：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
一開始想著是不是dubbo的版本的問題，但生產者都已經啟動成功了，而且用的還是同一個依賴，就想著加一下這個類的依賴看看能不能解決，依賴如下：
<!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
<dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>33.0.0-jre</version>
</dependency>
果然啟動成功了。
但也納悶，為什么同樣的dubbo依賴，生產者那邊就可以，到了消費者這邊就不行了？
既然dubbo依賴是相同的，那肯定就是其他依賴的問題，于是對比了其他依賴，最終發現minio的依賴下包含 com.google.guava 依賴
那就注釋掉 com.google.guava 依賴，加入 minio 依賴試試，結果發現也能啟動成功…
太難了，就這個問題折騰了好久（大哭）
5、找不到生產者
生產者和消費者都啟動了，但是消費者調用生產者服務時報如下錯：
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：
我的生產者是若依的文件服務，若依的文件服務原來是用 Feign 進行遠程調用的，我只是想把 Feign 改為 dubbo ，就定義了一個和原文件接口相同抽象方法的接口，其實就是接口名不一樣，再用文件實現類去實現，這樣我就不用重新寫方法了，具體如下：
因為啟動沒報錯，nacos中也有看到對應的服務，就沒有多想，就是會一直報這個錯，后面就想著單獨見一個類加上 @DubboService(version = “1.0.0”) 試試
結果就調用成功了…
 prepare 階段)
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之Mermaid餅圖和象限圖)
