搭建分布式系统（idea+springboot+dubbo）

前提

当然，搭建分布式系统之前，你要搞清楚dubbo和Zookeeper的关系，先安装启动Zookeeper

搭建工程，新建maven工程，什么都不需要勾选

或者创建空工程

创建公共接口spring-dubbo-api（即公共调用模块）

file->new->module

选择maven或springboot都可以，我创建的是springboot，

定义接口方法（随便定义了一个）

创建服务提供者spring-dubbo-provider

1. 创建springboot 选择web工程，这个不在截图了
2. 添加pom依赖
   添加公共api模块

<dependency>
            <groupId>com.wonder</groupId>
            <artifactId>spring-dubbo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

引入dubbo依赖和Zookeeper以及Zookeeper客户端

           <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.7.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.0.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.13</version>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>

3. 配置application.properties

#spring项目名
spring.application.name=dubbo_auto_configuration_provider_demo
#Dubbo provider configuration
dubbo.application.name=dubbo_provider
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880
#扫描注解包通过该设置将服务注册到zookeeper
dubbo.scan.base-packages=com.wonder.provider.service

4. 实现api中接口方法

import org.apache.dubbo.config.annotation.Service;
@Service //dubbo中的服务注解
public class UserServiceImpl implements UserService {
    @Override
    public String getUsername(String id) {

        System.out.println("调用provider成功。。。。。");

        return "success";
    }
}

创建spring-dubbo-consumer项目

1. 项目创建同上spring-dubbo-provider的创建
2. 配置application.properties

dubbo.application.name=dubbo_consumer
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181

#避免端口冲突
server.port=8085

3. 调用

@RestController
public class UserController {

    @Reference
    UserService userService;

    @GetMapping("hello")
    public String sayHello(String name){
       String result = userService.getUsername("1");

        return result;
    }
}

两个服务项目调用

1. 修改配置dubbo.protocol.port=20881

dubbo.protocol.name=dubbo
dubbo.protocol.port=20881
#扫描注解包通过该设置将服务注册到zookeeper
dubbo.scan.base-packages=com.wonder.provider.service

2. 设置Reference 中 设置 check 为 false.

    OrderService orderService;