虽然 Bubbo 提供了许多功能，但我们只用它的 RPC 通信功能整合到 Spring Cloud Alibaba 一站式解决方案中。
也就是 Bubbo 是解决我们微服务中 RPC 通信的方式而已。

新建项目

image.png
什么都不用选直接点完成
image.png

POM

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.     <parent>
  6.         <groupId>org.springframework.boot</groupId>
  7.         <artifactId>spring-boot-starter-parent</artifactId>
  8.         <version>2.6.7</version>
  9.         <relativePath/> <!-- lookup parent from repository -->
  10.     </parent>
  11.     <groupId>com.funtl</groupId>
  12.     <artifactId>hello-apache-dubbo</artifactId>
  13.     <version>1.0.0-SNAPSHOT</version>
  14.     <packaging>pom</packaging>
  15.     <name>hello-apache-dubbo</name>
  16.     <description>hello-apache-dubbo</description>
  19.     <modules>
  20.         <module>hello-apache-dubbo-dependencies</module>
  21.         <module>hello-apache-dubbo-provider</module>
  22.     </modules>
  24.     <properties>
  25.         <java.version>1.8</java.version>
  26.         <!-- Project revision -->
  27.         <revision>0.0.1-SNAPSHOT</revision>
  28.         <maven.compiler.source>${java.version}</maven.compiler.source>
  29.         <maven.compiler.target>${java.version}</maven.compiler.target>
  30.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  31.         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  32.     </properties>
  34.     <licenses>
  35.         <license>
  36.             <name>Apache License, Version 2.0</name>
  37.             <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
  38.             <distribution>repo</distribution>
  39.         </license>
  40.     </licenses>
  42.     <developers>
  43.         <developer>
  44.             <id>wu</id>
  45.             <name>Brett Wu</name>
  46.             <email>brettwu@aliyun.com</email>
  47.         </developer>
  48.     </developers>
  50.     <dependencyManagement>
  51.         <dependencies>
  52.             <dependency>
  53.                 <groupId>com.funtl</groupId>
  54.                 <artifactId>hello-apache-dubbo-dependencies</artifactId>
  55.                 <version>${project.version}</version>
  56.                 <type>pom</type>
  57.                 <scope>import</scope>
  58.             </dependency>
  59.         </dependencies>
  61.     </dependencyManagement>
  63.     <profiles>
  64.         <profile>
  65.             <id>default</id>
  66.             <activation>
  67.                 <activeByDefault>true</activeByDefault>
  68.             </activation>
  69.             <properties>
  70.                 <spring-javaformat.version>0.0.31</spring-javaformat.version>
  71.             </properties>
  72.             <build>
  73.                 <plugins>
  74.                     <plugin>
  75.                         <!-- 格式化代码插件 -->
  76.                         <groupId>io.spring.javaformat</groupId>
  77.                         <artifactId>spring-javaformat-maven-plugin</artifactId>
  78.                         <version>${spring-javaformat.version}</version>
  79.                     </plugin>
  80.                     <plugin>
  81.                         <groupId>org.apache.maven.plugins</groupId>
  82.                         <artifactId>maven-surefire-plugin</artifactId>
  83.                         <configuration>
  84.                             <includes>
  85.                                 <include>**/*Tests.java</include>
  86.                             </includes>
  87.                             <excludes>
  88.                                 <exclude>**/Abstract*.java</exclude>
  89.                             </excludes>
  90.                             <systemPropertyVariables>
  91.                                 <java.security.egd>file:/dev/./urandom</java.security.egd>
  92.                                 <java.awt.headless>true</java.awt.headless>
  93.                             </systemPropertyVariables>
  94.                         </configuration>
  95.                     </plugin>
  96.                     <plugin>
  97.                         <groupId>org.apache.maven.plugins</groupId>
  98.                         <artifactId>maven-enforcer-plugin</artifactId>
  99.                         <executions>
  100.                             <execution>
  101.                                 <id>enforce-rules</id>
  102.                                 <goals>
  103.                                     <goal>enforce</goal>
  104.                                 </goals>
  105.                                 <configuration>
  106.                                     <rules>
  107.                                         <bannedDependencies>
  108.                                             <exludes>
  109.                                                 <exclude>commons-logging:*:*</exclude>
  110.                                             </exludes>
  111.                                             <searchTransitive>true</searchTransitive>
  112.                                         </bannedDependencies>
  113.                                     </rules>
  114.                                     <fail>true</fail>
  115.                                 </configuration>
  116.                             </execution>
  117.                         </executions>
  118.                     </plugin>
  119.                     <plugin>
  120.                         <groupId>org.apache.maven.plugins</groupId>
  121.                         <artifactId>maven-install-plugin</artifactId>
  122.                         <configuration>
  123.                             <skip>true</skip>
  124.                         </configuration>
  125.                     </plugin>
  126.                     <plugin>
  127.                         <groupId>org.apache.maven.plugins</groupId>
  128.                         <artifactId>maven-javadoc-plugin</artifactId>
  129.                         <configuration>
  130.                             <skip>true</skip>
  131.                         </configuration>
  132.                         <inherited>true</inherited>
  133.                     </plugin>
  134.                 </plugins>
  135.             </build>
  136.         </profile>
  137.     </profiles>
  139.     <repositories>
  140.         <repository>
  141.             <id>spring-milestone</id>
  142.             <name>Spring Milestone</name>
  143.             <url>https://repo.spring.io/milestone</url>
  144.             <snapshots>
  145.                 <enabled>false</enabled>
  146.             </snapshots>
  147.         </repository>
  148.         <repository>
  149.             <id>spring-snapshot</id>
  150.             <name>Spring Snapshot</name>
  151.             <url>https://repo.spring.io/snapshot</url>
  152.             <snapshots>
  153.                 <enabled>true</enabled>
  154.             </snapshots>
  155.         </repository>
  156.     </repositories>
  158.     <pluginRepositories>
  159.         <pluginRepository>
  160.             <id>spring-milestone</id>
  161.             <name>Spring Milestone</name>
  162.             <url>https://repo.spring.io/milestone</url>
  163.             <snapshots>
  164.                 <enabled>false</enabled>
  165.             </snapshots>
  166.         </pluginRepository>
  167.         <pluginRepository>
  168.             <id>spring-snapshot</id>
  169.             <name>Spring Snapshot</name>
  170.             <url>https://repo.spring.io/snapshot</url>
  171.             <snapshots>
  172.                 <enabled>true</enabled>
  173.             </snapshots>
  175.         </pluginRepository>
  176.     </pluginRepositories>
  178. </project>

统一依赖管理

在hello-apache-dubbo工程下创建统一依赖管理，创建目录 hello-apache-dubbo-dependencies
在 hello-apache-dubbo-dependencies 下创建 pom.xml 文件，内容如下：

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.7</version>
        <relativePath/>
    </parent>

    <groupId>com.funtl</groupId>
    <artifactId>hello-apache-dubbo-dependencies</artifactId>
    <version>${revision}</version>
    <packaging>pom</packaging>
    <name>hello-apache-dubbo-dependencies</name>
    <description>Spring Cloud Alibaba Dependencies</description>

    <properties>
        <java.version>1.8</java.version>
        <revision>1.0.0-SNAPSHOT</revision>

        <!-- dubbo  -->
        <dubbo.version>2.7.15</dubbo.version>
        <dubbo.registry.nacos>2.6.7</dubbo.registry.nacos>
        <!--<dubbo.actuator.version>3.0.7</dubbo.actuator.version>-->
        <!-- Spring Settings 设置spring-cloud版本，此版本需要跟 spring boot 对应，不然会报错
        可以上官网查询对应版本 https://spring.io/projects/spring-cloud#learn-->
        <spring-cloud.version>2021.0.2</spring-cloud.version>

        <!-- 设置 alibaba 版本，此版本要需要跟 spring boot 对应，不然会报错
        官网地址：https://github.com/alibaba/spring-cloud-alibaba/blob/2021.x/README-zh.md-->
        <spring-cloud-alibaba.version>2021.0.1.0</spring-cloud-alibaba.version>
        <spring.cloud.commons>3.1.2</spring.cloud.commons>
        <spring.context.support.version>1.0.11</spring.context.support.version>

        <!--<sentinel.version>1.8.3</sentinel.version>
        <seata.version>1.4.2</seata.version>
        <nacos.client.version>1.4.2</nacos.client.version>
        <nacos.config.version>0.8.0</nacos.config.version>

        <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
        <maven-javadoc-plugin.version>3.1.1</maven-javadoc-plugin.version>
        <maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
        <flatten-maven-plugin.version>1.2.7</flatten-maven-plugin.version>-->

    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.spring</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.context.support.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-commons</artifactId>
                <version>${spring.cloud.commons}</version>
            </dependency>


            <!-- Apache Dubbo  Begin-->
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>javax.servlet</groupId>
                        <artifactId>servlet-api</artifactId>
                    </exclusion>
                    <exclusion>
                        <groupId>log4j</groupId>
                        <artifactId>log4j</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-actuator</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-spring-boot-starter</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>dubbo-registry-nacos</artifactId>
                <version>${dubbo.registry.nacos}</version>
            </dependency>
            <!-- Apache Dubbo  End-->

            <dependency>
                <groupId>com.alibaba.spring</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring.context.support.version}</version>
            </dependency>

        </dependencies>
    </dependencyManagement>

    <repositories>
        <repository>
            <id>spring-milestone</id>
            <name>Spring Milestone</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-snapshot</id>
            <name>Spring Snapshot</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestone</id>
            <name>Spring Milestone</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshot</id>
            <name>Spring Snapshot</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>

        </pluginRepository>
    </pluginRepositories>


</project>

Dubbo 服务注册与发现

概述

由于我们已经有了 Nacos 注册中心，Sentinel 熔断限流控制中心，所以我们不再使用 Zookeeper 和DubboAdmin 来管理我们的Dubbo应用程序，Dubbo仅 当作我们微服务中的 RPC 通信框架，真正实现对内RPC，对外REST

创建服务提供者

pom

创建一个名为hello-apache-dubbo-provider 的服务提供者项目，pom.xml 配置如下:

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.funtl</groupId>
        <artifactId>hello-apache-dubbo</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
    <groupId>com.funtl</groupId>
    <artifactId>hello-apache-dubbo-provider</artifactId>
    <packaging>pom</packaging>
    <name>hello-apache-dubbo-provider</name>
    <description>hello-apache-dubbo-provider</description>

    <modules>
        <module>hello-apache-dubbo-provider-api</module>
        <module>hello-apache-dubbo-provider-service</module>
    </modules>

    <licenses>
        <license>
            <name>Apache License, Version 2.0</name>
            <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
            <distribution>repo</distribution>
        </license>
    </licenses>

    <developers>
        <developer>
            <id>wu</id>
            <name>Brett Wu</name>
            <email>brettwu@aliyun.com</email>
        </developer>
    </developers>
</project>

hello-apache-dubbo-provider模块下创建：

  • hello-apache-dubbo-provider-api暴露接口的模块

  • hello-apache-dubbo-provider-service实现接口的模块

    创建服务提供者接口模块

    pom

    创建一个 hello-apache-dubbo-provider-api的模块，pom.xml配置如下：

    <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
      <groupId>com.funtl</groupId>
      <artifactId>hello-apache-dubbo-provider</artifactId>
      <version>1.0.0-SNAPSHOT</version>
  </parent>

  <groupId>com.funtl</groupId>
  <artifactId>hello-apache-dubbo-provider-api</artifactId>
  <packaging>jar</packaging>
  <name>hello-apache-dubbo-provider-api</name>
  <description>hello-apache-dubbo-provider-api</description>

  <licenses>
      <license>
          <name>Apache License, Version 2.0</name>
          <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
          <distribution>repo</distribution>
      </license>
  </licenses>

  <developers>
      <developer>
          <id>wu</id>
          <name>Brett Wu</name>
          <email>brettwu@aliyun.com</email>
      </developer>
  </developers>

  <dependencies>
      <!-- Dubbo -->
      <dependency>
          <groupId>org.apache.dubbo</groupId>
          <artifactId>dubbo</artifactId>
      </dependency>
  </dependencies>
</project>

    定义接口

    ```java pachage com.funtl.apache.dubbo.provider.api;

public interface EchoService{ String echo(String string); }

<a name="FJvln"></a>
### 创建服务提供者接口实现
<a name="KskNa"></a>
#### pom
创建一个 `hello-apache-dubbo-provider-service`的模块，`pom.xml`配置如下：
```xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>com.funtl</groupId>
        <artifactId>hello-apache-dubbo-provider</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>

    <groupId>com.funtl</groupId>
    <artifactId>hello-apache-dubbo-provider-service</artifactId>
    <packaging>jar</packaging>
    <name>hello-apache-dubbo-provider-service</name>
    <description>hello-apache-dubbo-provider-service</description>

    <licenses>
        <license>
            <name>Apache License, Version 2.0</name>
            <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
            <distribution>repo</distribution>
        </license>
    </licenses>

    <developers>
        <developer>
            <id>wu</id>
            <name>Brett Wu</name>
            <email>brettwu@aliyun.com</email>
        </developer>
    </developers>

    <dependencies>

        <!-- Spring Boot Begin -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-actuator-autoconfigure</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-commons</artifactId>
        </dependency>
        <!-- Spring Boot End -->

        <!-- Apache Dubbo Begin -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo-registry-nacos</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.spring</groupId>
            <artifactId>spring-context-support</artifactId>
        </dependency>
        <!-- Apache Dubbo End -->

        <!--Project Begin-->
        <dependency>
            <groupId>com.funtl</groupId>
            <artifactId>hello-apache-dubbo-provider-api</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
        <!--Project End-->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.funtl.apache.dubbo.provider.ProviderApplication</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

Application

package com.funtl.apache.dubbo.provider;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;


@SpringBootApplication
public class ProviderApplication {

    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }
}

service

实现类

package com.funtl.apache.dubbo.provider.service;

import com.funtl.apache.dubbo.provider.api.EchoService;
import org.apache.dubbo.config.annotation.Service;


@DubboService(version = "1.0.0")
public class EchoServiceImpl implements EchoService {

    @Override
    public String echo(String messege) {
        return "[echo] Dubbo Hello, " + messege;
    }
}

application

配置文件：

spring:
  application:
    name: dubbo-provider
  main:
    allow-bean-definition-overriding: true

dubbo:
  scan:
    base-packages: com.funtl.apache.dubbo.provider.service
  protocol:
    name: dubbo
    port: -1
  registry:
    address: nacos://192.168.3.192:8848