Dubbo HelloWord 与 Spring Boot 整合

实现消费者项目代码调用提供者项目代码，使用 zookeeper 做为注册中心

interface 项目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>dubbo</groupId>
    <artifactId>demo-interface</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

接口

package org.apache.dubbo.demo;

public interface DemoService {
    String sayHello(String name);
}

项目结构

Provider 提供者项目

基本 springboot 项目，不用添加任何模块（starter）

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>dubbo</groupId>
    <artifactId>demo-boot-provider</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <name>demo-boot-provider</name>
    <description>demo-boot-provider</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot.version>2.1.4.RELEASE</spring-boot.version>
        <dubbo.version>2.7.1</dubbo.version>
    </properties>

    <!--版本管理-->
    <dependencyManagement>
        <dependencies>
            <!-- Spring Boot -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- Apache Dubbo  -->
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-dependencies-bom</artifactId>
                <version>${dubbo.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <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>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>dubbo</groupId>
            <artifactId>demo-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

配置，application.properties

#1、指定当前服务/应用的名字（同样的服务名字相同，不要和别的服务同名）
dubbo.application.name=demo-provider
dubbo.application.qos-enable=true
dubbo.application.qos-port=22222
dubbo.application.qos-accept-foreign-ip=false

#2、指定注册中心的位置
dubbo.registry.protocol=zookeeper
dubbo.registry.address=127.0.0.1:2181

#3、指定通信规则（通信协议？通信端口）
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880

接口实现

package dubbo.demo.boot.provider.service.impl;

import org.apache.dubbo.config.annotation.Service;
import org.apache.dubbo.demo.DemoService;
import org.springframework.stereotype.Component;

@Service //暴露服务，非 spring 的注解
@Component
public class DemoServiceImpl implements DemoService {

    @Override
    public String sayHello(String name) {
        System.out.println("Hello " + name + ", request from consumer: ");
        return "Hello " + name + ", response from provider: ";
    }
}

启动类

package dubbo.demo.boot.provider;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableDubbo // 开启 Dubbo
@SpringBootApplication
public class DemoBootProviderApplication {

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

项目结构

Consumer 消费者项目

创建时加入 web 模块

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>dubbo</groupId>
    <artifactId>demo-boot-consumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <name>demo-boot-consumer</name>
    <description>demo-boot-consumer</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot.version>2.1.4.RELEASE</spring-boot.version>
        <dubbo.version>2.7.1</dubbo.version>
    </properties>

    <!--版本管理-->
    <dependencyManagement>
        <dependencies>
            <!-- Spring Boot -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- Apache Dubbo  -->
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-dependencies-bom</artifactId>
                <version>${dubbo.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${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>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>dubbo</groupId>
            <artifactId>demo-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-zookeeper</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

配置，application.properties

#1、指定当前服务/应用的名字（同样的服务名字相同，不要和别的服务同名）
dubbo.application.name=demo-consumer
dubbo.application.qos-enable=true
dubbo.application.qos-port=33333
dubbo.application.qos-accept-foreign-ip=false

#2、指定注册中心的位置
dubbo.registry.protocol=zookeeper
dubbo.registry.address=127.0.0.1:2181

#3、指定通信规则（通信协议？通信端口）
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880

controller 层

package dubbo.demo.boot.consumer.controller;

import org.apache.dubbo.config.annotation.Reference;
import org.apache.dubbo.demo.DemoService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class Consumer {

    @Reference // 引用服务
    private DemoService demoService;

    @ResponseBody
    @RequestMapping("test")
    public String test() {
        return demoService.sayHello("world");
    }
}

启动类

package dubbo.demo.boot.consumer;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableDubbo // 开启 Dubbo
@SpringBootApplication
public class DemoBootConsumerApplication {

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

项目结构

测试

先启动提供者，再启动消费者，最后访问 http://127.0.0.1:8080/test

---

https://github.com/apache/incubator-dubbo-spring-boot-project

http://dubbo.apache.org/zh-cn/docs/user/configuration/annotation.html