SpringBoot整合Dubbo&ZooKeeper

前言

关于dubbo这里就不多说了，想了解更多关于dubbo的请移步到dubbo官网。文章中涉及的代码都在我的Github:https://github.com/nyvi/dubbo。

服务注册中心

这里选用zookeeper为注册中心
1.首先你需要在ZooKeeper官网 下载一个zk的包。这里使用的版本是zookeeper-3.4.11。
2.windows下安装zookeeper也很简单，首先解压zookeeper-3.4.11.tar.gz，然后将conf文件下的zoo_sample.cfg更名为zoo.cfg，并修改里面的配置，配置如下：

dataDir=D:\develop\zookeeper\data
dataLogDir=D:\develop\zookeeper\log

3.然后到bin目录下双击运行zkServer.cmd，出现如下界面就代表zk启动成功了。默认端口为2181。

其余省略...
2018-04-08 18:08:38,205 [myid:] - INFO  [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181

构建项目

这里采用模块化构建项目

dubbo

dubbo的pom.xml如下:

<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>
	<groupId>com.dubbo</groupId>
	<artifactId>dubbo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>

	<properties>
		<java.version>1.8</java.version>
		<curator.version>4.0.1</curator.version>
		<zookeeper.version>3.4.11</zookeeper.version>
		<dubbo-spring-boot-starter.version>2.0.0</dubbo-spring-boot-starter.version>
	</properties>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.10.RELEASE</version>
	</parent>

	<dependencyManagement>
		<dependencies>
		
			<dependency>
				<groupId>com.dubbo</groupId>
				<artifactId>dubbo-api</artifactId>
				<version>${project.version}</version>
			</dependency>
			
			<dependency>
				<groupId>com.alibaba.spring.boot</groupId>
				<artifactId>dubbo-spring-boot-starter</artifactId>
				<version>${dubbo-spring-boot-starter.version}</version>
			</dependency>
			
			<dependency>
				<groupId>org.apache.zookeeper</groupId>
				<artifactId>zookeeper</artifactId>
				<exclusions>
					<exclusion>
						<groupId>org.slf4j</groupId>
						<artifactId>slf4j-log4j12</artifactId>
					</exclusion>
				</exclusions>
				<version>${zookeeper.version}</version>
			</dependency>
			
			<dependency>
				<groupId>org.apache.curator</groupId>
				<artifactId>curator-framework</artifactId>
				<version>${curator.version}</version>
			</dependency>
			
		</dependencies>
	</dependencyManagement>

	<modules>
		<module>dubbo-api</module>
		<module>dubbo-provider</module>
		<module>dubbo-consumer</module>
	</modules>
</project>

dubbo-api

api 主要的职责就是定义接口

public interface IHelloService {
    String sayHello(String name);
}

dubbo-provider

provider 服务提供者
dubbo-provider的pom.xml如下：

<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>com.dubbo</groupId>
		<artifactId>dubbo</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>
	<artifactId>dubbo-provider</artifactId>

	<dependencies>
	
		<dependency>
			<groupId>com.dubbo</groupId>
			<artifactId>dubbo-api</artifactId>
		</dependency>
	
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	
		<dependency>
			<groupId>com.alibaba.spring.boot</groupId>
			<artifactId>dubbo-spring-boot-starter</artifactId>
		</dependency>
	
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
		</dependency>
	
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
		</dependency>
	
	</dependencies>

</project>

服务提供方法:

package com.nyvi.dubbo;

import org.springframework.stereotype.Component;
import com.alibaba.dubbo.config.annotation.Service;

@Service
@Component
public class HelloServiceImpl implements IHelloService {
	@Override
	public String sayHello(String name) {
		return "Hello " + name + " !";
	}
}

配置参数:

server.port=8081
spring.application.name=dubbo-provider-test
spring.dubbo.registry=zookeeper://127.0.0.1:2181?client=curator
spring.dubbo.protocol=dubbo

dubbo-consumer

consumer 服务消费者
dubbo-consumer 的pom.xml和 dubbo-provider的pom.xml 差不多这里就不再重复了。
服务消费方法:

package com.nyvi.dubbo;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.alibaba.dubbo.config.annotation.Reference;

@RestController
public class HelloConsumer {

	@Reference
	private IHelloService helloService;

	@GetMapping("sayHello/{name}")
	public String sayHello(@PathVariable("name") String name) {
		return helloService.sayHello(name);
	}
}

配置参数:

server.port=8082
spring.dubbo.appname=dubbo-spring-boot-starter-consumer-test
spring.dubbo.registry=zookeeper://127.0.0.1:2181?client=curator
spring.dubbo.protocol=dubbo

验证

1.启动生产者(dubbo-provider)
2.启动生产者(duboo-consumer)
3.浏览器输入: http://127.0.0.1:8082/sayHello/dubbo
如果输出: Hello dubbo ! 那么恭喜你，成功了。

管理平台

dubbo有一套管理平台dubbo-admin可以自行去下载然后打包成war扔到tomcat里面运行，初始账户为:root/root。 这里就不再描述了。