前言

青青草原羊村中,对于几只调皮的小羊，特别是懒羊羊，慢羊羊村长可是费了不少心思呢。几只小羊尚且如此，那么对于服务的治理，我们该怎么办呢。
为了解决服务治理，阿里专门开发了服务治理的RPC框架-Dubbo,对于这个，你岂能不了解呢~~
该教程，用于了解Dubbo + zookeeper的使用，之后会有其原理介绍与代码分析。

安装zk

1. zookeeper 官网下载zk.
2. 修改 /conf/zooexample.cfg 为zoo.cfg

tickTime=2000  
dataDir= ../data  (填写自己的data目录)  
dataLogDir=../logs  
clientPort=2181

3. 启动zk, ./bin/zkServer.sh start,成功如下：

ZooKeeper JMX enabled by default
Using config: /Users/zyq/develomentEnvir/zookeeper-3.4.12/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

创建项目

创建多模块项目

core模块 (被Provider和Consumer共同依赖的项目)

1. 创建com.chezhe.chezheService

package com.chezhe;
public interface CheZheService {
     String hello();
}

2. 创建com.chezhe.CheZheService2

package com.chezhe;

public interface CheZheService2 {
     String hello();
}

provider 生产者

pom.xml

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>io.dubbo.springboot</groupId>
			<artifactId>spring-boot-starter-dubbo</artifactId>
		</dependency>
		<dependency>
			<groupId>com.chezhe</groupId>
			<artifactId>core</artifactId>
			<version>1.1-SNAPSHOT</version>
		</dependency>

application.properties

# 端口号配置
server.port=8081

#dubbo配置
spring.dubbo.application.name=provider  //随便填
spring.dubbo.registry.address=zookeeper://127.0.0.1:2181  //zk地址
spring.dubbo.protocol.name=dubbo        //设置RPC协议为dubbo协议
spring.dubbo.protocol.port=25040        //生产者暴露的服务端口
spring.dubbo.scan=com.chezhe            //需要扫描的包（带有service注解的类）
spring.dubbo.consumer.check=false        
spring.dubbo.timeout=10000              //调用dubbo超时时间

实现类

1. 实现类1

package com.chezhe.service.impl;

@Service
public class CheZheServiceImpl implements CheZheService {

    @Override
    public String hello() {
        return "你好，车辙";
    }
}

2. 实现类2

package com.chezhe.service.impl;

@Service
public class CheZheServiceImpl2 implements CheZheService2 {

    @Override
    public String hello() {
        return "你好，车辙";
    }
}

consumer 消费者

pom.xml

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>io.dubbo.springboot</groupId>
			<artifactId>spring-boot-starter-dubbo</artifactId>
		</dependency>
		<dependency>
			<groupId>com.chezhe</groupId>
			<artifactId>core</artifactId>
			<version>1.1-SNAPSHOT</version>
		</dependency>

application.properties

# 端口号配置
server.port=8082
#dubbo配置
spring.dubbo.application.name=consumer  //随便填
spring.dubbo.registry.address=zookeeper://127.0.0.1:2181  //zk地址
spring.dubbo.scan=com.chezhe            //需要扫描的包（带有service注解的类）
spring.dubbo.consumer.check=false        
spring.dubbo.timeout=10000              //调用dubbo超时时间

controller

@RestController
public class CheZheController {

    @Reference
    private CheZheService cheZheService;

    @RequestMapping(value = "/cheZheTest",method = RequestMethod.GET)
    public String cheZheTest(){
        return cheZheService.hello();
    }
}

测试

1. 启动Provider和Consumer
2. 请求 http://localhost:8082/cheZheTest

源码项目地址

由于GitHub访问较慢，便于下载，放于阿里云上
https://code.aliyun.com/trotyzyq/dubbo-zk