转自梁飞的博客(http://javatar.iteye.com/blog/1123915)
Java 代码
/*
- Copyright 2011 Alibaba.com All right reserved. This software is the
- confidential and proprietary information of Alibaba.com ("Confidential
- Information"). You shall not disclose such Confidential Information and shall
- use it only in accordance with the terms of the license agreement you entered
- into with Alibaba.com.
*/
package com.alibaba.study.rpc.framework;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.net.ServerSocket;
import java.net.Socket;
/**
-
RpcFramework
-
@author william.liangf
*/
public class RpcFramework {/**
- 暴露服务
- @param service 服务实现
- @param port 服务端口
- @throws Exception
*/
public static void export(final Object service, int port) throws Exception {
if (service == null)
throw new IllegalArgumentException("service instance == null");
if (port <= 0 || port > 65535)
throw new IllegalArgumentException("Invalid port " + port);
System.out.println("Export service " + service.getClass().getName() + " on port " + port);
ServerSocket server = new ServerSocket(port);
for(;;) {
try {
final Socket socket = server.accept();
new Thread(new Runnable() {
@Override
public void run() {
try {
try {
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
String methodName = input.readUTF();
Class[] parameterTypes = (Class[])input.readObject();
Object[] arguments = (Object[])input.readObject();
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
try {
Method method = service.getClass().getMethod(methodName, parameterTypes);
Object result = method.invoke(service, arguments);
output.writeObject(result);
} catch (Throwable t) {
output.writeObject(t);
} finally {
output.close();
}
} finally {
input.close();
}
} finally {
socket.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
- 引用服务
- @param 接口泛型
- @param interfaceClass 接口类型
- @param host 服务器主机名
- @param port 服务器端口
- @return 远程服务
- @throws Exception
*/
@SuppressWarnings("unchecked")
public static T refer(final Class interfaceClass, final String host, final int port) throws Exception {
if (interfaceClass == null)
throw new IllegalArgumentException("Interface class == null");
if (! interfaceClass.isInterface())
throw new IllegalArgumentException("The " + interfaceClass.getName() + " must be interface class!");
if (host == null || host.length() == 0)
throw new IllegalArgumentException("Host == null!");
if (port <= 0 || port > 65535)
throw new IllegalArgumentException("Invalid port " + port);
System.out.println("Get remote service " + interfaceClass.getName() + " from server " + host + ":" + port);
return (T) Proxy.newProxyInstance(interfaceClass.getClassLoader(), new Class[] {interfaceClass}, new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] arguments) throws Throwable {
Socket socket = new Socket(host, port);
try {
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
try {
output.writeUTF(method.getName());
output.writeObject(method.getParameterTypes());
output.writeObject(arguments);
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
Object result = input.readObject();
if (result instanceof Throwable) {
throw (Throwable) result;
}
return result;
} finally {
input.close();
}
} finally {
output.close();
}
} finally {
socket.close();
}
}
});
}
}
用起来也像模像样:
(1) 定义服务接口
Java 代码
/*
- Copyright 2011 Alibaba.com All right reserved. This software is the
- confidential and proprietary information of Alibaba.com ("Confidential
- Information"). You shall not disclose such Confidential Information and shall
- use it only in accordance with the terms of the license agreement you entered
- into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
/**
-
HelloService
-
@author william.liangf
*/
public interface HelloService {String hello(String name);
}
(2) 实现服务
Java 代码
/*
- Copyright 2011 Alibaba.com All right reserved. This software is the
- confidential and proprietary information of Alibaba.com ("Confidential
- Information"). You shall not disclose such Confidential Information and shall
- use it only in accordance with the terms of the license agreement you entered
- into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
/**
-
HelloServiceImpl
-
@author william.liangf
*/
public class HelloServiceImpl implements HelloService {public String hello(String name) {
return "Hello " + name;
}
}
(3) 暴露服务
Java 代码
/*
- Copyright 2011 Alibaba.com All right reserved. This software is the
- confidential and proprietary information of Alibaba.com ("Confidential
- Information"). You shall not disclose such Confidential Information and shall
- use it only in accordance with the terms of the license agreement you entered
- into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
import com.alibaba.study.rpc.framework.RpcFramework;
/**
-
RpcProvider
-
@author william.liangf
*/
public class RpcProvider {public static void main(String[] args) throws Exception {
HelloService service = new HelloServiceImpl();
RpcFramework.export(service, 1234);
}
}
(4) 引用服务
Java 代码
/*
- Copyright 2011 Alibaba.com All right reserved. This software is the
- confidential and proprietary information of Alibaba.com ("Confidential
- Information"). You shall not disclose such Confidential Information and shall
- use it only in accordance with the terms of the license agreement you entered
- into with Alibaba.com.
*/
package com.alibaba.study.rpc.test;
import com.alibaba.study.rpc.framework.RpcFramework;
/**
-
RpcConsumer
-
@author william.liangf
*/
public class RpcConsumer {public static void main(String[] args) throws Exception {
HelloService service = RpcFramework.refer(HelloService.class, "127.0.0.1", 1234);
for (int i = 0; i < Integer.MAX_VALUE; i ++) {
String hello = service.hello("World" + i);
System.out.println(hello);
Thread.sleep(1000);
}
}
}
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