SpringBoot + Dubbo的全注解方式入门使用
2020-05-28 本文已影响0人
随风飘的纸飞机
一个简单的入门 Demo，这里我采用 SpringBoot 的全注解方式，感觉 XML 的方式更麻烦一点
代码地址
- Github: https://github.com/dolyw/ProjectStudy/tree/master/Dubbo/01-Dubbo-SpringBoot
- Gitee(码云): https://gitee.com/dolyw/ProjectStudy/tree/master/Dubbo/01-Dubbo-SpringBoot
1. 前言
一般现在用于生产环境的 Dubbo 注册中心都是 ZooKeeper，那我们首先启动 ZooKeeper，安装可以查看: ZooKeeper安装使用
2. 创建
我们先创建一个父工程
2.1. 父工程
打开 IDEA，File-New-Project...，选择 Maven 点击下一步 Next
groupId 我们填写我们的包名 com.demo，artifactId 填写我们的项目名 01-Dubbo-SpringBoot，version 先默认，点击下一步 Next
位置存在在 E:\XUE\ProjectStudy\Dubbo\01-Dubbo-SpringBoot，点击完成 Finish
创建完成，打开，可以把除 pom.xml 的其他文件都删除了，再新建一个 .gitignore 的 Git 忽略文件，IDEA 生成的文件删除了还是会生成，所以就不用删了
图片
修改 pom.xml 的版本属性，写一个统一的版本号，子工程统一使用
<version>${revision}</version>
<properties>
<revision>1.0.0</revision>
<java.version>1.8</java.version>
<dubbo.version>2.7.4.1</dubbo.version>
</properties>
2.2. API工程
这个主要是存放接口的，抽取出来，方便服务提供者和消费者直接使用，不需要两边建立重复的接口文件
我们在父工程下点击 File-New-Module，还是选择 Maven，点击下一步 Next，填写模块名 artifactId 为 common-api，点击下一步 Next，修改名称为 common-api，点击完成 Finish 即可
修改 common-api 工程 pom.xml 版本号 version 为 ${revision}，pom.xml如下
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>01-Dubbo-SpringBoot</artifactId>
<groupId>com.demo</groupId>
<version>${revision}</version>
<relativePath>../pom.xml</relativePath>
</parent>
<groupId>com.demo</groupId>
<artifactId>common-api</artifactId>
<packaging>jar</packaging>
<version>${revision}</version>
<name>common-api</name>
<description>Dubbo Demo project</description>
</project>
并且创建一个服务接口 IDemoService
package com.demo;
/**
* IDemoService
*
* @author wliduo[i@dolyw.com]
* @date 2019/12/18 16:37
*/
public interface IDemoService {
/**
* 说你好
*
* @param
* @return java.lang.String
* @throws
* @author wliduo[i@dolyw.com]
* @date 2019/12/20 10:11
*/
String sayHello(String name);
}
2.3. Provider工程
这个是提供服务的工程，我们在父工程下点击 File-New-Module，这里选择 Spring Initializr(SpringBoot)，默认点击下一步 Next，填写模块名 artifactId 为 provider-service
图片
点击下一步 Next，修改名称为 provider-service，点击完成 Finish 即可，然后修改当前模块的 pom 文件如下
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>01-Dubbo-SpringBoot</artifactId>
<groupId>com.demo</groupId>
<version>${revision}</version>
<relativePath>../pom.xml</relativePath>
</parent>
<groupId>com.demo</groupId>
<artifactId>provider-service</artifactId>
<packaging>jar</packaging>
<version>${revision}</version>
<name>provider-service</name>
<description>Dubbo Demo project for Spring Boot</description>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Dubbo Spring Boot Starter -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>${dubbo.version}</version>
</dependency>
<!-- Zookeeper dependencies -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- common-api -->
<dependency>
<groupId>com.demo</groupId>
<artifactId>common-api</artifactId>
<version>${revision}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Zookeeper 配置信息 application.yml
server:
port: 8881
spring:
application:
name: provider-service
demo:
service:
version: 1.0
embedded:
zookeeper:
port: 2181
dubbo:
application:
name: ${spring.application.name}
scan:
# 扫描Service注解
base-packages: com.demo.service
protocol:
name: dubbo
port: -1
registry:
address: zookeeper://127.0.0.1:${embedded.zookeeper.port}
file: ${user.home}/dubbo-cache/${spring.application.name}/dubbo.cache
实现一个服务接口 DemoServiceImpl，如果无法引入 IDemoService，就把 common-api 工程打包下
package com.demo.service;
import com.demo.IDemoService;
import org.apache.dubbo.config.annotation.Service;
import org.springframework.beans.factory.annotation.Value;
/**
* DemoServiceImpl
*
* @author wliduo[i@dolyw.com]
* @date 2019/12/20 10:10
*/
@Service(version = "${demo.service.version}")
public class DemoServiceImpl implements IDemoService {
/**
* The default value of ${dubbo.application.name} is ${spring.application.name}
*/
@Value("${spring.application.name}")
private String serviceName;
@Override
public String sayHello(String name) {
System.out.println(name + "连接成功");
return serviceName + ": " + name;
}
}
2.4. Consumer工程
这个是消费服务的工程，我们在父工程下点击 File-New-Module，这里选择 Spring Initializr(SpringBoot)，默认点击下一步 Next，填写模块名 artifactId 为 consumer-service
图片
点击下一步 Next，修改名称为 consumer-service，点击完成 Finish 即可，然后修改当前模块的 pom 文件如下
<?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>
<artifactId>01-Dubbo-SpringBoot</artifactId>
<groupId>com.demo</groupId>
<version>${revision}</version>
<relativePath>../pom.xml</relativePath>
</parent>
<groupId>com.demo</groupId>
<artifactId>consumer-service</artifactId>
<packaging>jar</packaging>
<version>${revision}</version>
<name>consumer-service</name>
<description>Dubbo Demo project for Spring Boot</description>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<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>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Dubbo Spring Boot Starter -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>${dubbo.version}</version>
</dependency>
<!-- Zookeeper dependencies -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- common-api -->
<dependency>
<groupId>com.demo</groupId>
<artifactId>common-api</artifactId>
<version>${revision}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Zookeeper 配置信息 application.yml
server:
port: 8882
spring:
application:
name: consumer-service
demo:
service:
version: 1.0
embedded:
zookeeper:
port: 2181
dubbo:
application:
name: ${spring.application.name}
registry:
address: zookeeper://127.0.0.1:${embedded.zookeeper.port}
file: ${user.home}/dubbo-cache/${spring.application.name}/dubbo.cache
我们写一个 DemoController 来调用服务
package com.demo.controller;
import com.demo.IDemoService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
/**
* DemoController
*
* @author wliduo[i@dolyw.com]
* @date 2019/12/20 11:08
*/
@RestController
@RequestMapping
public class DemoController {
@Reference(version = "${demo.service.version}")
private IDemoService demoService;
@GetMapping("/")
public String sayHello() {
String text = demoService.sayHello("Hello");
System.out.println(text);
return text;
}
@GetMapping("/demo")
public String sayXXX(@RequestParam("name") String name) {
String text = demoService.sayHello(name);
System.out.println(text);
return text;
}
}
2.5. 聚合
把父工程的 pom 文件改下
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>01-Dubbo-SpringBoot</artifactId>
<packaging>pom</packaging>
<version>${revision}</version>
<name>01-Dubbo-SpringBoot</name>
<description>Dubbo Demo project</description>
<properties>
<revision>1.0.0</revision>
<java.version>1.8</java.version>
<dubbo.version>2.7.4.1</dubbo.version>
</properties>
<modules>
<module>common-api</module>
<module>provider-service</module>
</modules>
</project>
3. 启动
先启动 Zookeeper，然后启动 provider-service 提供服务，再启动 consumer-service 调用服务，两个都是 SpringBoot 工程，可以直接启动，启动成功后可以直接调用 consumer-service 的两个 Controller 方法
图片
图片
后台打印
图片
图片
这样就调用成功了，Dubbo 简单的生产服务和消费服务就是这样
参考
