Dubbo+Nacos 简单小案例
其他文章
Nacos介绍和安装：https://blog.csdn.net/xyjcfucdi128/article/details/108355876
1.项目结构
- dubbo-base : 存放公共接口；
- dubbo-consumer : 调用远程服务；
- dubbo-provider : 提供远程服务；
2.项目依赖
2.1 dubbo-base 的 pom 依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 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>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.wangmx.base</groupId>
<artifactId>dubbo-base</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>dubbo-base</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<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>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2.2 dubbo-consumer 的 pom 依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 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>2.2.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>dubbo-consumer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>dubbo-consumer</name>
<packaging>jar</packaging>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<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>
<!--服务接口-->
<dependency>
<groupId>com.wangmx.base</groupId>
<artifactId>dubbo-base</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!-- Dubbo依赖 -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>2.7.0</version>
</dependency>
<!-- Nacos依赖 -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
<version>2.7.1</version>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2.3 dubbo-provider 的 pom 依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 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>2.2.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>dubbo-provider</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>dubbo-provider</name>
<packaging>jar</packaging>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<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>
<!--服务接口-->
<dependency>
<groupId>com.wangmx.base</groupId>
<artifactId>dubbo-base</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<!-- Dubbo依赖 -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>2.7.0</version>
</dependency>
<!-- Nacos依赖 -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
<version>2.7.1</version>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3.项目 application.properties 配置
3.1 dubbo-base 的 application.properties 配置
#空
3.2 dubbo-consumer 的 application.properties 配置
server:
port: 8862
dubbo:
# 配置服务信息
application:
name: dubbo-consumer
# 禁用QOS同一台机器可能会有端口冲突现象
qos-enable: false
qos-accept-foreign-ip: false
# 配置注册中心
registry:
address: nacos://127.0.0.1:8848
# 设置超时时间
consumer:
timeout: 4000
spring:
main:
# 解决Bean重复定义问题
allow-bean-definition-overriding: true
3.3 dubbo-provider 的 application.properties 配置
server:
port: 8861
dubbo:
# 配置服务信息
application:
name: dubbo-provider
# 禁用QOS同一台机器可能会有端口冲突现象
qos-enable: false
qos-accept-foreign-ip: false
# 配置注册中心
registry:
address: nacos://127.0.0.1:8848
# 设置协议-协议由提供方指定消费方被动接受
protocol:
name: dubbo
port: 20880
spring:
main:
# 解决Bean重复定义问题
allow-bean-definition-overriding: true
4.项目 启动类
4.1 dubbo-base 的启动类
@SpringBootApplication
public class DubboBaseApplication {
public static void main(String[] args) {
SpringApplication.run(DubboBaseApplication.class, args);
}
}
4.2 dubbo-consumer 的启动类
/**
* 消费者
*/
@EnableDubbo //开启Dubbo的注解支持
@SpringBootApplication
public class DubboConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(DubboConsumerApplication.class, args);
}
}
4.3 dubbo-provider 的启动类
/**
* 生产者
*/
@EnableDubbo //开启Dubbo的注解支持
@SpringBootApplication
public class DubboProviderApplication {
public static void main(String[] args) {
SpringApplication.run(DubboProviderApplication.class, args);
}
}
5.项目 测试代码
5.1 dubbo-base 公共方法 和 实体
-
目录结构
-
entity
/** * RPC接口DTO * 注意这里要实现序列化接口 * @Author wangmx */ @Data public class ProviderTestEntity implements Serializable { // ID private int id; // 名字 private String name; // 序号 private Integer number; } -
service
/** * RPC接口 * @Author wangmx */ public interface IProviderService { List<ProviderTestEntity> queryList(); } -
vo
/** * 返回数据 * * @author wangmx */ public class R extends HashMap<String, Object> { private static final long serialVersionUID = 1L; public R() { put("code", 200); put("msg", "success"); } public static R error() { return error(500, "未知异常，请联系管理员"); } public static R error(String msg) { return error(500, msg); } public static R error(int code, String msg) { R r = new R(); r.put("code", code); r.put("msg", msg); return r; } public static R errorMassgae(int code, String msg) { R r = new R(); r.put("code", code); r.put("data", new ArrayList<String>()); r.put("msg", msg); return r; } public static R ok(String msg) { R r = new R(); r.put("msg", msg); return r; } public static R ok(Map<String, Object> map) { R r = new R(); r.putAll(map); return r; } public static R ok() { return new R(); } @Override public R put(String key, Object value) { super.put(key, value); return this; } }
5.2 dubbo-consumer 的 controller
-
目录结构
-
controller
/** * 消费测试接口 * @Author wangmx */ @RestController @RequestMapping("/consumer") public class ConsumerController { // Dubbo远程调用注解 @Reference private IProviderService providerService; @RequestMapping(value = "/list",method = RequestMethod.GET) public R getList(){ // 远程调用 List<ProviderTestEntity> list = providerService.queryList(); return R.ok().put("data",list); } }
5.3 dubbo-provider 的 serviceImpl
-
目录结构
-
impl
/** * 生产者Dubbo接口实现 * @Author wangmx */ @Service public class ProviderServiceImpl implements IProviderService { @Override public List<ProviderTestEntity> queryList() { // 初始化数据 ProviderTestEntity testEntity1 = new ProviderTestEntity(); testEntity1.setId(1); testEntity1.setName("张三"); testEntity1.setNumber(100); ProviderTestEntity testEntity2 = new ProviderTestEntity(); testEntity2.setId(2); testEntity2.setName("李四"); testEntity2.setNumber(101); ProviderTestEntity testEntity3 = new ProviderTestEntity(); testEntity3.setId(2); testEntity3.setName("王五"); testEntity3.setNumber(102); // 组装数据 List<ProviderTestEntity> list = new ArrayList<>(); list.add(testEntity1); list.add(testEntity2); list.add(testEntity3); return list; } }
6.启动 Nacos 并 访问
我这里 Nacos 是 windows 版本的 ，不知道 Nacos 或者 没有的 可以看我 Nacos 介绍和安装
-
启动Nacos
-
访问
7.启动服务 并 测试接
- 启动服务
分别启动 dubbo-provide ， dubbo-consumer 服务
查看 Nacos 服务列表
- 调用测试接口
8.GitLab 下载地址
下载地址：https://github.com/2224132867/dubbo-nacos