rpc 简单实现
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接口:
package com.ltz.rpc;
public interface HelloService {
String hello(String name);
}
实现:
package com.ltz.rpc;
public class HelloServiceImpl implements HelloService{
@Override
public String hello(String name) {
// TODO Auto-generated method stub
return name;
}
}
rpc provider:
package com.ltz.rpc;
public class RpcProvider {
public staticvoid main(String[] args) throws Exception {
HelloService service =new HelloServiceImpl();
RpcFramework.export(service, 1234);
}
}
rpc consumer
package com.ltz.rpc;
public class RpcConsumer {
public staticvoid main(String[] args) throws Exception {
HelloService service = RpcFramework.refer(HelloService.class,"127.0.0.1", 1234);
for (inti = 0; i < 10; i ++) {
String hello =service.hello("World" + i);
System.out.println(hello);
Thread.sleep(1000);
}
}
}
主要rpc core:
package com.ltz.rpc;
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;
public class RpcFramework {
public static void export(final Object service,int port) throws Exception{
if(service==null){
throw new IllegalArgumentException("service is null");
}
if(port <=0 || port>65535){
throw new IllegalArgumentException("port is illegal");
}
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() {
// TODO Auto-generated method stub
try {
try {
ObjectInputStream input = new ObjectInputStream(socket.getInputStream());
try {
String methodName = input.readUTF();
System.out.println("methodName:"+methodName);
Class<?>[] parameterTypes = (Class<?>[])input.readObject();
System.out.println("parameterTypes:"+parameterTypes.toString());
Object[] arguments = (Object[])input.readObject();
System.out.println("arguments:"+arguments.toString());
ObjectOutputStream output = new ObjectOutputStream(socket.getOutputStream());
try {
Method method = service.getClass().getMethod(methodName, parameterTypes);
Object result = method.invoke(service, arguments);
System.out.println("result: "+result);
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 <T> 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> T refer(final Class<T> 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();
}
}
});
}
}
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