Dubbo2.7用curator客户端从Zookeeper中获取对象

Posted 2021-02-13 vahome

实验环境：win7 64,idea2018.3.3

环境搭建

1、新建一个空项目

2、然后添加一个maven模块作为父模块名字为ticketparent

3、然后添加一个spring模块名字为supplier-ticket用来生产对象

4、然后再添加一个spring模块名字为consumer-user用来消费

5、给maven父模块再指定一层父模块

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.3.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

6、给父模块添加依赖

<properties>
    <spring-boot.version>2.1.1.RELEASE</spring-boot.version>
    <dubbo.version>2.7.0</dubbo.version>
</properties>
    
<dependencyManagement>
    <dependencies>
        <!-- Spring Boot -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>${spring-boot.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <!-- Aapche Dubbo  -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-dependencies-bom</artifactId>
            <version>${dubbo.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>
</dependencyManagement>

<dependencies>
    <!-- Dubbo Spring Boot Starter -->
    <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>
    </dependency>
</dependencies>

7、给consumer-user和supplier-ticket这两个spring模块指定ticketparent为父模块
如果pom提升出错这里把之前那个springboot父模块代替掉然后删除groupId就可以了

8、现在需要客户端工具连接zookeeper因为不管是消费者还是生产者我们都需要连接zookeeper所以
我们在父模块再次添加dependence添加curator客户端工具比较多要导三个包

<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
</dependency>

<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-recipes</artifactId>
</dependency>

<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</dependency>

编写代码
1、给supplier-ticket这个模块新建一个接口

 

2、然后再新建一个实现类 然后添加Service注解注意是org.apache.dubbo.config.annotation.Service这个包

3、然后在supplier-ticket这个模块下application.perproties文件中下面三条属性

spring.application.name=supplier-ticket
#路径是你主机的路径
dubbo.registry.address=zookeeper://192.168.3.108:2181
#扫描这个包下带@Service注解的类 注意这个包名很重要这里写什么消费者那边也要写什么
dubbo.scan.base-packages=com.vawu.service

4、启动supplier-ticket

6、把service包粘贴到consumer-user下  再次强调两个模块的包名必须相同不然无法分布式获取对象

7、再次在application.properties文件中写入下面的配置和上面一样只不过不用配置扫描包了

spring.application.name=supplier-ticket
#路径是你主机的路径
dubbo.registry.address=zookeeper://192.168.3.108:2181

8、在ConsumerUserApplicationTests测试类中写下面的代码，这个Reference别引错了还是dubbo包下的

运行结果

2019-03-17