/**
* Copyright (C) 2002-2012 The FreeCol Team
*
* This file is part of FreeCol.
*
* FreeCol is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* FreeCol is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FreeCol. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.freecol.client.networking;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.sf.freecol.common.networking.Connection;
import net.sf.freecol.common.networking.MessageHandler;
import org.w3c.dom.Element;
/**
* The client connection to a server.
*/
public final class Client {
private static final Logger logger = Logger.getLogger(Client.class.getName());
/**
* The <code>Connection</code> this <code>Client</code> uses when
* communicating with the server.
*/
private final Connection c;
private String host;
private int port;
/**
* Creates a new <code>Client</code>.
*
* @param host The host to connect to.
* @param port The port to connect to.
* @param handler The MessageHandler to use.
* @param name The name for the connection.
* @throws IOException If an exception is thrown while creating
* a new {@link Connection}.
*/
public Client(String host, int port, MessageHandler handler, String name)
throws IOException {
this.host = host;
this.port = port;
c = new Connection(host, port, handler, name);
}
/**
* Gets the host used by the connection.
* Used in reconnect.
*
* @return The host.
*/
public String getHost() {
return host;
}
/**
* Gets the port used by the connection.
* Used in reconnect.
*
* @return The port.
*/
public int getPort() {
return port;
}
/**
* Gets the <code>Connection</code> this <code>Client</code> uses when
* communicating with the server.
*
* @return The {@link Connection}.
*/
public Connection getConnection() {
return c;
}
/**
* Sets the <code>MessageHandler</code> for this <code>Client</code>.
* The <code>MessageHandler</code> is the class responsible for receiving
* and handling the network messages.
*
* @param mh The new <code>MessageHandler</code> for this client.
*/
public void setMessageHandler(MessageHandler mh) {
c.setMessageHandler(mh);
}
/**
* Disconnects this client from the server.
*/
public void disconnect() {
try {
c.close();
} catch (IOException e) {
logger.warning("Exception while closing connection: " + e);
}
}
/**
* Sends the specified message to the server.
*
* @param element The element (root element in a DOM-parsed XML tree) that
* holds all the information
* @see #sendAndWait(Element)
* @see #ask(Element)
*/
public void send(Element element) {
try {
c.send(element);
} catch (IOException e) {
logger.log(Level.WARNING, "Could not send: " + element, e);
}
}
/**
* Sends the specified message to the server and waits for the reply
* to be returned before returning from this method.
*
* @param element The element (root element in a DOM-parsed XML tree) that
* holds all the information
* @see #send(Element)
* @see #ask(Element)
*/
public void sendAndWait(Element element) {
try {
c.sendAndWait(element);
} catch (IOException e) {
logger.log(Level.WARNING, "Could not sendAndWait: " + element, e);
}
}
/**
* Sends the specified message to the server and returns the reply.
*
* @param element The element (root element in a DOM-parsed XML tree)
* that holds all the information
* @return The answer from the server or <code>null</code> if either
* an error occured or the server did not send a reply.
* @see #sendAndWait
* @see #send
*/
public Element ask(Element element) {
try {
return c.askDumping(element);
} catch (IOException e) {
logger.log(Level.WARNING, "Could not ask: " + element, e);
}
return null;
}
}