【Dubbo】02. 基于xml配置的Dubbo Demo

02. 基于xml配置的Dubbo Demo

1. 创建一个空的maven项目

<?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>com.dxh</groupId>
    <artifactId>demo-base-xml</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>servie-api</module>
        <module>service-provider</module>
        <module>service-consumer</module>
    </modules>

    <properties>
        <dubbo.version>2.7.5</dubbo.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-common</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-zookeeper</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-nacos</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-rpc-dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-remoting-netty4</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-serialization-hessian2</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- 日志配置 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.5</version>
        </dependency>

        <!-- json数据化转换 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. 创建module —— service-api

新建接口：

package com.dxh.service;

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

3. 创建module —— service-provider

创建服务提供者模块

3.1 引入相关依赖

pom中引入 service-api

<dependency>
            <groupId>com.dxh</groupId>
            <artifactId>servie-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-remoting-netty4</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-serialization-hessian2</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-config-spring</artifactId>
            <version>2.7.5</version>
        </dependency>

3.2 实现service-api中的接口

编写实现类实现 HelloService，

package com.dxh.service.impl;

import com.dxh.service.HelloService;

public class HelloServiceImpl implements HelloService {
    @Override
    public String sayHello(String name) {
        return "result: "+ name;
    }
}

3.3 新建dubbo配置文件

resource中新建配置文件——dubbo-provider.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd        http://dubbo.apache.org/schema/dubbo        http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <!-- 提供方应用信息，用于计算依赖关系 -->
    <dubbo:application name="service-provider"  />

    <!-- 使用multicast广播注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />

    <!-- 用dubbo协议在20882端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20882" />

    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.dxh.service.HelloService" ref="helloService" />

    <!-- 和本地bean一样实现服务 -->
    <bean id="helloService" class="com.dxh.service.impl.HelloServiceImpl" />
</beans>

3.4 编写启动类

package com.dxh;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;

public class ProviderApplication {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:dubbo-provider.xml");
        applicationContext.start();
        System.in.read();
    }
}

4. 创建module —— service-consumer

创建服务消费者模块

4.1 引入相关依赖

pom中引入 service-api

pom中引入dubbo

<dependency>
        <groupId>com.dxh</groupId>
            <artifactId>servie-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-remoting-netty4</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-serialization-hessian2</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-config-spring</artifactId>
            <version>2.7.5</version>
        </dependency>

4.2 新建dubbo配置文件

resource中新建配置文件——dubbo-consumer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd        http://dubbo.apache.org/schema/dubbo        http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
    <dubbo:application name="service-consumer"  />

    <!-- 使用multicast广播注册中心暴露发现服务地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" />

    <!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
    <dubbo:reference id="helloService" interface="com.dxh.service.HelloService" />
</beans>

4.3 新建启动类

package com.dxh;

import com.dxh.service.HelloService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ConsumerApplication {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:dubbo-consumer.xml");
        applicationContext.start();
        HelloService helloService =  applicationContext.getBean("helloService",HelloService.class); // 获取远程服务代理
        String hello = helloService.sayHello("world"); // 执行远程方法
        System.out.println( hello ); // 显示调用结果
    }
}

5. 启动测试效果

• 启动service-provider
• 启动service-consumer