springboot dubbo 既是提供者又是消费者demo源码

最新推荐文章于 2021-02-20 17:40:33 发布

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#springboot #dubbo #提供者 #消费者 #源码

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本文详细介绍了一个基于SpringBoot和Dubbo的微服务项目结构与配置。项目使用SpringBoot 2.0.4版本，通过dubbo-spring-boot-starter整合Dubbo，实现服务提供者与消费者的通信。文章提供了pom.xml、UserService接口、UserServiceImpl服务实现、UserController控制器、dubbo.xml配置文件以及启动类的完整代码示例。

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项目provicderandconsumer 结构如下：
在这里插入图片描述
pom.xml (我的springboot 版本是2.0.4.RELEASE)

<?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>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>provicderandconsumer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>provicderandconsumer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
            <scope>compile</scope>
        </dependency>
        <!--web-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <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>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

公共服务接口 UserService

package com.example.springbootapi.dubbo.service;

/**
 * @author
 */
public interface UserService {
    public String print(String s);
}

UserServiceImpl

package com.example.provicderandconsumer.service;

import com.example.springbootapi.dubbo.service.UserService;

//提供者提供的接口服务 service 采用xml配置
//@Service(interfaceClass = UserService.class)
//@Component
public class UserServiceImpl implements UserService {
    @Override
    public String print(String s) {
        return "say2:" + s;
    }
}

UserController

package com.example.provicderandconsumer.controller;

import com.example.springbootapi.dubbo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @author
 */
@Controller
public class UserController {
    //reference 在xml配置，这里需要用注解Autowired
    @Autowired
    public UserService userService;

    @RequestMapping("/test")
    @ResponseBody
    public String test(){
        String s = userService.print("123sssssssss");
        return s;
    }
}

dubbo.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://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:registry address="zookeeper://127.0.0.1:2181" timeout="60000"/>
    <!-- port值-1 表示让dubbo自行找一个可用的port -->
    <dubbo:protocol port="-1" name="dubbo"/>
    <!-- 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="dubbo"/>

    <!--消费者-->
    <!--关闭服务消费方所有服务的启动检查。dubbo缺省会在启动时检查依赖的服务是否可用，不可用时会抛出异常，阻止Spring初始化完成。url="dubbo//172.16.1.112:20880"-->
    <dubbo:consumer check="false" />
    <!--reference 采用xml配置实现,在代码中获取远程服务需要加注解@Autowired-->
    <dubbo:reference id="userService" check="false"  interface="com.example.springbootapi.dubbo.service.UserService"/>
    <dubbo:annotation package="com.example.provicderandconsumer.*"/>

    <!--提供者-->
    <dubbo:service protocol="dubbo" ref="userService" interface="com.example.springbootapi.dubbo.service.UserService"/>
    <bean id="userService" class="com.example.provicderandconsumer.service.UserServiceImpl"/>

</beans>

启动类 ProvicderandconsumerApplication

package com.example.provicderandconsumer;

import com.alibaba.dubbo.spring.boot.annotation.EnableDubboConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ImportResource;

@EnableDubboConfiguration
@ImportResource(locations = {"classpath:dubbo.xml"})
@ComponentScan(basePackages = "com.example.provicderandconsumer.*")
@SpringBootApplication
public class ProvicderandconsumerApplication {

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

}

application.properties