자바 RMI 미니채팅프로그램)JAVA RMI를 이용한 미니 채팅프로그램, 원격객체, 원격인터페이스, RMI서버, 클라이언트 구현
http://ojc.asia/bbs/board.php?bo_table=LecJavaNet&wr_id=116
https://youtu.be/iX_c380_eNc
package chat.server;
import java.rmi.Remote;
import java.rmi.RemoteException;
import chat.client.Client;
/**
* 클라이언트에서 호출할 원격메소드를 정의한 원격인터페이스
*
* @author jclee
*/
public interface Server extends Remote {
public void setClient(Client client) throws RemoteException;
public void setMessage(String msg) throws RemoteException;
}
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package chat.server;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.ArrayList;
import chat.client.Client;
public class ServerImpl extends UnicastRemoteObject implements Server {
private static ArrayList<Client> clients = new ArrayList<Client>();
public ServerImpl() throws RemoteException {
}
public void setClient(Client client) throws RemoteException {
clients.add(client);
}
public void setMessage(String msg) throws RemoteException {
System.out.println(">>>>>>>>>>>>>>>> " + msg);
for (Client client : ServerImpl.clients) {
// 클라이언트의 원격메소드 setMessage를 호출하여 글을 보낸다.
client.setMessage(msg);
}
}
public static void main(String[] args) throws Exception {
ServerImpl serverImpl = new ServerImpl();
Naming.rebind("chatServer", serverImpl);
System.out.println("Chatting Server Executed...");
}
}
-------------------------------------------------------------------
package chat.client;
import java.rmi.Remote;
import java.rmi.RemoteException;
/**
* 서버가 호출하여 메소드를 전달할 원격메소드 정의
* @author jclee
*
*/
public interface Client extends Remote{
public void setMessage(String msg) throws RemoteException;
}
-------------------------------------------------------------
package chat.client;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import chat.server.Server;
public class ClientImpl extends UnicastRemoteObject implements Client {
public ClientImpl() throws RemoteException {
}
public void setMessage(String msg) throws RemoteException {
System.out.println(msg);
}
public static void main(String[] args) throws Exception {
ClientImpl clientImpl = new ClientImpl();
Server server = (Server) Naming.lookup("rmi://localhost/chatServer");
server.setClient(clientImpl);
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
while (true) {
String msg = in.readLine();
// 채팅 메시지를 원격메소드인 setMessage로 원격 서버에 전달
if (!"".equals(msg)) server.setMessage("[메시지] " + msg);
}
}
}
실행방법
1. 서버에서(이클립스 워크스페이스 : C:\dev\workspace, 프로젝트 명칭 : rmi)
C:\dev\workspace\rmi\bin>rmic chat.server.ServerImpl
C:\dev\workspace\rmi\bin>start rmiregistry 1099
C:\dev\workspace\rmi\bin>java chat.server.ServerImpl
2. 클라이언트
C:\dev\workspace\rmi\bin>java chat.client.ClientImpl
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