SpingBoot+Dubbo+Zookeeper实现简单分布式开发的应用详解

mvn clean package -Dmaven.test.skip=true

java -jar dubbo-admin-0.0.1-SNAPSHOT.jar

<!-- Dubbo Spring Boot Starter -->
    <dependency>
      <groupId>org.apache.dubbo</groupId>
      <artifactId>dubbo-spring-boot-starter</artifactId>
      <version>2.7.3</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
    <dependency>
      <groupId>com.github.sgroschupf</groupId>
      <artifactId>zkclient</artifactId>
      <version>0.1</version>
    </dependency>

    <!-- 引入zookeeper -->
    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-framework</artifactId>
      <version>2.12.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-recipes</artifactId>
      <version>2.12.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.zookeeper</groupId>
      <artifactId>zookeeper</artifactId>
      <version>3.4.14</version>
      <!--排除这个slf4j-log4j12-->
      <exclusions>
        <exclusion>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

public interface TicketService {

  public String getTicket();
}

import org.apache.dubbo.config.annotation.Service;
import org.springframework.stereotype.Component;

//zookeeper：服务注册与实现

@Service  //可以被扫描到，在项目一启动就自动注册到注册中心
@Component //使用了dubbo后，注意不要用到spring的service注解
public class TicketServiceImpl implements TicketService {
  @Override
  public String getTicket() {
    return "枫";
  }
}

import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;


@Service// 注入容器中，用spring的注解
public class UserService {

  //要拿到provider-service提供的票,要去注册中心
  @Reference  //引用，导入dubbo的包。正常开发引用pom坐标，但是可以定义路径相同的接口名
  TicketService ticketService;

  public void buyTicket(){
    String ticket = ticketService.getTicket();

    System.out.println("在注册中心拿到=》"+ticket);
  }
}