Duboo-入门到学废【上篇】

2023-12-26 19:59:25

1.什么是duboo🤶🤶🤶

Dubbo是一个由阿里巴巴开发的基于Java的开源RPC框架。它提供了高性能、透明化的远程方法调用，以及服务自动注册和发现、负载均衡、容错、限流、监控等功能，使得分布式应用开发变得更加简单。Dubbo广泛应用于阿里巴巴内部服务化架构，也是国内外很多大型互联网公司的首选框架之一。?

2.架构图🤶🤶🤶

Provider:暴露服务的服务提供方
Container：服务运行容器
Consumer:调用远程服务的服务消费方
Registry:服务注册与发现的注册中心
Monitor：统计服务的调用次数和调用时间的监控中心

3.快速入门?🤶🤶🤶

基本步骤：

①创建服务提供者Provider模块
②创建服务消费者Consumer模块
③在服务提供者模块编写UserServicelmpl 提供服务
④在服务消费者中的UserController远程调用UserServicelmpl 提供的服务
⑤分别启动两个服务，测试

3.1user-api 💕💕

创建一个模块作为公共接口

public interface UserService {
    public String say();
}

3.2user-service?💕💕

创建逻辑模块

1.导入依赖：

1.引入user-api，

2.tomcat端口为9000

   <properties>
        <spring.version>5.1.9.RELEASE</spring.version>
        <dubbo.version>2.7.4.1</dubbo.version>
        <zookeeper.version>4.0.0</zookeeper.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>user-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <port>9000</port>
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>

?2.创建spring.xml:

配置zookeeper（注册中心）的 ip地址和端口

     <!--项目名称-->
    <dubbo:application name="dubbo-service"></dubbo:application>
    <!--注册中心zookeeper地址-->
    <dubbo:registry address="zookeeper://192.168.20.130:2181"></dubbo:registry>
    <dubbo:annotation package="com.xz.service.impl"></dubbo:annotation>

3.配置web.xml

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:spring*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

?4.逻辑代码实现

@Service//将这个类提供的方法，对外发布，将访问的地址 ip 端口，注册到注册中心中
public class UserServiceImpl implements UserService {
    @Override
    public String say() {
        return "hello xiaoZhang~";
    }
}

3.3user-web💕💕

创建一个模块，作为访问层接口?

?1.导入依赖

1.引入user-api，

2.tomcat端口为8000


    <properties>
        <spring.version>5.1.9.RELEASE</spring.version>
        <dubbo.version>2.7.4.1</dubbo.version>
        <zookeeper.version>4.0.0</zookeeper.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>user-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <port>8000</port>
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>

?2.配置web.xml

<!--springmvc-->
  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

3.配置springmvc.xml

引入zookeeper（注册中心）的ip地址和端口，以及要扫描的包

  <mvc:annotation-driven/>
    <context:component-scan base-package="com.xz.controller"></context:component-scan>

    <!--项目名称-->
    <dubbo:application name="dubbo-web"></dubbo:application>
    <!--注册中心zookeeper地址-->
    <dubbo:registry address="zookeeper://192.168.20.130:2181"></dubbo:registry>
    <dubbo:annotation package="com.xz.controller"></dubbo:annotation>

4.controller接口实现

@Reference的作用：
1.从zookeeper（注册中心）获取userService的访问url
2.进行远程调用RPC
3.将结果封装为代理对象，给变量赋值

@RestController
@RequestMapping("/user")
public class UserController {

    
    @Reference//远程注入
    private UserService userService;

    @RequestMapping("/say")
    public String say(){
        return userService.say();
    }

}

?3.4加载运行插件💕💕

注意：在启动插件时，一定要先clear 和install 父项目的，然后依次执行，最后在启动tomcat7-run

不然你会痛苦的~

?至此~dubbo部署成功！！！

4.浅浅理解🤶🤶🤶

对于服务与消费的理解：相对于之前的dao，service，controller的三层架构，如今服务就是service，controller就是消费者；与此同时，每个服务都可以独立开发、部署和维护

文章来源:https://blog.csdn.net/dfdg345/article/details/134946819
本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若内容造成侵权/违法违规/事实不符，请联系我的编程经验分享网邮箱：veading@qq.com进行投诉反馈，一经查实，立即删除！