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nettyRpc

##运用到以下技术

Spring

Netty

Protostuff 基于protobuf序列化框架

Zookeeper

##目录介绍

rpc-client 服务消费方调用------------------在zookeeper上查找服务所在的主机，并发起请求

rpc-common 服务传输协议以及编解码

rc-registry 服务生产方服务注册服务到zookeeper，以及服务消费方在zookeeper查找服务

rpc-server 服务生产方调用。----------------服务的注解标示，以及把注解的服务注册到zookeeper上。

##使用

#一、编写服务接口 创建一个maven项目rpc-test-api

package com.goutrip.rpc.test.api;

public interface HelloService {

	String hello(String name);
}

#maven pom.xml

<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>

#二、编写服务接口的实现类 创建一个maven项目rpc-test-producer服务提供者

package com.goutrip.rpc.test.customer;

import com.goutrip.rpc.server.RpcService;
import com.goutrip.rpc.test.api.HelloService;

@RpcService(HelloService.class) // 指定远程接口
public class HelloServiceImpl implements HelloService{

	public String hello(String name) {
		return "Hello! " + name;
	}

}

#配置服务端

<beans ...>
    <context:component-scan base-package="com.goutrip.rpc.test.customer"/>
    <context:property-placeholder location="classpath:rpc.properties"/>

    <bean id="serviceRegistry" class="com.goutrip.rpc.registry.zookeeper.ZookeeperServiceRegistry">
	<constructor-arg name="zkAddress" value="${rpc.registry_address}"/>
    </bean>

    <bean id="rpcServer" class="com.goutrip.rpc.server.RpcServer">
	<constructor-arg name="serviceAddress" value="${rpc.service_address}"/>
	<constructor-arg name="serviceRegistry" ref="serviceRegistry"/>
    </bean>
</beans>

具体的配置参数在rpc.properties文件中，内容如下：

rpc.service_address=127.0.0.1:8000
rpc.registry_address=192.168.56.134:2181

服务端 Spring 配置文件名为spring.xml，内容如下：

#maven pom.xml

<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>

#启动服务器并发布服务

public class RpcMain {
	@SuppressWarnings("resource")
	public static void main(String[] args) {
		new ClassPathXmlApplicationContext("spring.xml");
	}
}

#三、配置客户端 创建一个maven项目rpc-test-producer服务调用者

package com.goutrip.rpc.test.customer;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.goutrip.rpc.client.RpcProxy;
import com.goutrip.rpc.test.api.HelloService;
import com.goutrip.rpc.test.api.Person;

public class HelloClient {
	public static void main(String[] args) {
		ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
		RpcProxy rpc = ctx.getBean(RpcProxy.class);
		HelloService hello = rpc.create(HelloService.class);
		String str = hello.hello("你好");
		System.out.println(str);

	}
}

同样使用 Spring 配置文件来配置 RPC 客户端，spring.xml代码如下：

<beans ..>

    <context:property-placeholder location="classpath:rpc.properties"/>

    <bean id="serviceDiscovery" class="com.goutrip.rpc.registry.zookeeper.ZooKeeperServiceDiscovery">
	<constructor-arg name="zkAddress" value="${rpc.registry_address}"/>
    </bean>

    <bean id="rpcProxy" class="com.goutrip.rpc.client.RpcProxy">
	<constructor-arg name="serviceDiscovery" ref="serviceDiscovery"/>
    </bean>

</beans>

具体rpc.properties.内容如下:

rpc.service_address=127.0.0.1:8000
rpc.registry_address=192.168.56.134:2181

#maven pom.xml

<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-client</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>

<dependency>
	<groupId>com.goutrip.rpc</groupId>
	<artifactId>rpc-server</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>

<dependency>
	<groupId>com.goutrip.test</groupId>
	<artifactId>rpc-test-api</artifactId>
	<version>0.0.1-SNAPSHOT</version>
</dependency>