极客时间《消息队列高手课》案例篇《动手实现一个简单的RPC框架》示例源代码。
运行示例之前需要先安装：
- JDK 1.8
- Maven 3.3.9
$java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)
$mvn -version
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-11T00:41:47+08:00)$git clone [email protected]:liyue2008/simple-rpc-framework.git
$cd simple-rpc-framework
$mvn package$java -jar server/target/server-1.0-SNAPSHOT-jar-with-dependencies.jar
[main] INFO com.github.liyue2008.rpc.server.Server - 创建并启动RpcAccessPoint...
[main] INFO com.github.liyue2008.rpc.transport.RequestHandlerRegistry - Load request handler, type: 0, class: com.github.liyue2008.rpc.transport.RpcRequestHandler.
[main] INFO com.github.liyue2008.rpc.server.Server - 向RpcAccessPoint注册com.github.liyue2008.rpc.hello.HelloService服务...
[main] INFO com.github.liyue2008.rpc.server.Server - 服务名: com.github.liyue2008.rpc.hello.HelloService, 向NameService注册...
[main] INFO com.github.liyue2008.rpc.nameservice.LocalFileNameService - Register service: com.github.liyue2008.rpc.hello.HelloService, uri: rpc://localhost:9999.
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: com.github.liyue2008.rpc.nameservice.Metadata, type: 100.
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: java.lang.String, type: 0.
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: com.github.liyue2008.rpc.client.stubs.RpcRequest, type: 101.
[main] INFO com.github.liyue2008.rpc.nameservice.LocalFileNameService - Metadata:
Classname: com.github.liyue2008.rpc.hello.HelloService
URIs:
rpc://localhost:9999
[main] INFO com.github.liyue2008.rpc.server.Server - 开始提供服务，按任何键退出.java -jar client/target/client-1.0-SNAPSHOT-jar-with-dependencies.jar
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: com.github.liyue2008.rpc.nameservice.Metadata, type: 100.
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: java.lang.String, type: 0.
[main] INFO com.github.liyue2008.rpc.serialize.SerializeSupport - Found serializer, class: com.github.liyue2008.rpc.client.stubs.RpcRequest, type: 101.
[main] INFO com.github.liyue2008.rpc.nameservice.LocalFileNameService - Metadata:
Classname: com.github.liyue2008.rpc.hello.HelloService
URIs:
rpc://localhost:9999
[main] INFO com.github.liyue2008.rpc.client.Client - 找到服务com.github.liyue2008.rpc.hello.HelloService，提供者: rpc://localhost:9999.
[main] INFO com.github.liyue2008.rpc.client.Client - 请求服务, name: Master MQ...
[main] INFO com.github.liyue2008.rpc.client.Client - 收到响应: Hello, Master MQ.RPC框架对外提供的所有服务定义在一个接口RpcAccessPoint中：
/**
* RPC框架对外提供的服务接口
*/
public interface RpcAccessPoint extends Closeable{
/**
* 客户端获取远程服务的引用
* @param uri 远程服务地址
* @param serviceClass 服务的接口类的Class
* @param <T> 服务接口的类型
* @return 远程服务引用
*/
<T> T getRemoteService(URI uri, Class<T> serviceClass);
/**
* 服务端注册服务的实现实例
* @param service 实现实例
* @param serviceClass 服务的接口类的Class
* @param <T> 服务接口的类型
* @return 服务地址
*/
<T> URI addServiceProvider(T service, Class<T> serviceClass);
/**
* 服务端启动RPC框架，监听接口，开始提供远程服务。
* @return 服务实例，用于程序停止的时候安全关闭服务。
*/
Closeable startServer() throws Exception;
}注册中心的接口NameService：
/**
* 注册中心
*/
public interface NameService {
/**
* 注册服务
* @param serviceName 服务名称
* @param uri 服务地址
*/
void registerService(String serviceName, URI uri) throws IOException;
/**
* 查询服务地址
* @param serviceName 服务名称
* @return 服务地址
*/
URI lookupService(String serviceName) throws IOException;
}需要先定义一个服务接口：
public interface HelloService {
String hello(String name);
}客户端：
URI uri = nameService.lookupService(serviceName);
HelloService helloService = rpcAccessPoint.getRemoteService(uri, HelloService.class);
String response = helloService.hello(name);
logger.info("收到响应: {}.", response);服务端：
定义一个HelloService的实现：
public class HelloServiceImpl implements HelloService {
@Override
public String hello(String name) {
String ret = "Hello, " + name;
return ret;
}
}然后，把实现注册到RPC框架上，并启动RPC服务：
rpcAccessPoint.startServer();
URI uri = rpcAccessPoint.addServiceProvider(helloService, HelloService.class);
nameService.registerService(serviceName, uri);| Module | 说明 |
|---|---|
| client | 例子：客户端 |
| server | 例子：服务端 |
| rpc-api | RPC框架接口 |
| hello-service-api | 例子：接口定义 |
| rpc-netty | 基于Netty实现的RPC框架 |
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