Question

I have made a simple client using SMACK api and OpenFire on localhost. As of now, I have two users say X and Y. Whenever anyone logs in to the client, there is a send button which sends a message to user Y. I’ve checked the XMPP debug manager and I’m able to send/receive messages there. However, I’m unable to display those messages in a JLabel that I have alloted for displaying the messages. If the User Y hits the send button, as per the functionality it sends a message to himself and that comes up on the JLabel. But when user X hits the send button, the message is received, however it is not displayed/updated on the Y’s JLabel.

Interestingly, everything works as it should with gtalk configuration.

The structure is as follows:

WelcomeUser.java:
Is the welcome form with username and password prompt. On hitting the login button :
it sets the ChatBoard class visible and passes on the username password to the constructor of ChatBoard.
Code:

chBoard=new ChatBoard(username.getText(),password.getText());
                chBoard.setVisible(true);
                setVisible(false);

Here is the code for ChatBoard.java:

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Collection;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.border.EmptyBorder;

import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.RosterEntry;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Message;

public class ChatBoard extends JFrame implements MessageListener {

    private static final long serialVersionUID = 1L;
    private JPanel contentPane;
    static String username, password;
    static XMPPConnection connection;
    private JTextField textField;
    static JLabel board = new JLabel("");
    static Chat chat;

    public void sendChat() {
        try {
            chat = connection.getChatManager().createChat(
                    "userY@my-pc/Smack", this);
            chat.sendMessage("Hello, This is " + username);
        } catch (XMPPException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }


    /**
     * Create the frame.
     */
    public ChatBoard(String user, String pass) {

        username = user;
        password = pass;

        ////  
                   ///JFrame creation code ommited for this thread.
        // ////////////////////////////////////////////

        XMPPConnection.DEBUG_ENABLED = true;

        ConnectionConfiguration config = new ConnectionConfiguration(
                "127.0.0.1");


        connection = new XMPPConnection(config);

        try {
            connection.connect();
            System.out.println("Connected...");
        } catch (XMPPException e) {

            e.printStackTrace();
            System.out.println("Not Connected. Error :" + e.getMessage());
        }

        try {
            connection.login(username, password);
            System.out.println("Logged in...");
        } catch (XMPPException e) {

            e.printStackTrace();
            System.out.println("Not Logged in. Error :" + e.getMessage());
        }

        Roster roster = connection.getRoster();
        Collection<RosterEntry> entries = roster.getEntries();

        System.out.println("\n\n" + entries.size() + " buddy(ies):");
        for (RosterEntry r : entries) {
            System.out.println(r.getUser());
        }

        // /////////////////////////////////

    }

    @Override
    public void processMessage(Chat arg0, Message arg1) {
        // TODO Auto-generated method stub

        board.setText(board.getText() + arg1.getBody());
        System.out.println(arg1.getFrom() + ":" + arg1.getBody().toString());

    }

}

I’m new to this, so forgive me if there are any silly mistakes. Your help would be really appreciated.

Misc. Details: OpenFire 3.7.1 on localhost with SMACK 3.2.2

Answer 1

Have a look at the bottom of http://www.igniterealtime.org/builds/smack/docs/latest/documentation/messaging.html. For incoming chats from another user you have to override ChatManagerListener

Can you set a breakpoint on processMessage and does it hit that breakpoint? If so it might just be a matter of making sure the:

board.setText()

occurs on the Swing event dispatch thread

So try making your processMessage like this :

@Override
public void processMessage(Chat arg0, Message arg1) {
    // TODO Auto-generated method stub

    try
    {
        SwingUtilities.invokeAndWait(new Runnable()
        {

            @Override
            public void run()
            {
                board.setText(board.getText() + arg1.getBody());
            }
        });
    }
    catch (InvocationTargetException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    catch (InterruptedException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    System.out.println(arg1.getFrom() + ":" + arg1.getBody().toString());

}