ActionSender.java

package edu.stanford.hci.r3.actions.remote;

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

import edu.stanford.hci.r3.actions.R3Action;
import edu.stanford.hci.r3.util.DebugUtils;
import edu.stanford.hci.r3.util.networking.ClientServerType;

public class ActionSender {

        private ActionMessenger messengerOutput;

        private Socket socket;

        public ActionSender(String serverNameOrIPAddr, int port, ClientServerType type) {
                try {
                        socket = new Socket(serverNameOrIPAddr, port);
                        if (type == ClientServerType.PLAINTEXT) {
                                messengerOutput = new ActionPlainTextMessenger(socket);
                        } else {
                                messengerOutput = new ActionJavaObjectXMLMessenger(socket);
                        }
                } catch (UnknownHostException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        DebugUtils.println(e + " to " + serverNameOrIPAddr);
                        DebugUtils.println("Perhaps the ActionReceiver is not running on ["
                                        + serverNameOrIPAddr + "]?");
                }
        }

        public synchronized void disconnect() {
                try {
                        if (socket != null) {
                                socket.close();
                                socket = null;
                        }
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        public void invokeRemoteAction(R3Action action) {
                if (messengerOutput != null) {
                        messengerOutput.sendAction(action);
                } else {
                        // this should never happen...
                        // but for some reason we got a NPE once...
                        DebugUtils.println("Action Sender's Messenger is NULL!");
                }
        }

}

---