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Added Thread Safe behavior in Debugger.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2992 b35dd754-fafc-0310-a699-88a17e54d16e
This commit is contained in:
Derek DeMoro 2005-10-24 03:45:11 +00:00 committed by derek
parent e76f335910
commit a43b8a1cdb

View file

@ -20,32 +20,45 @@
package org.jivesoftware.smackx.debugger;
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.Date;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import org.jivesoftware.smack.*;
import org.jivesoftware.smack.debugger.*;
import org.jivesoftware.smack.packet.*;
import org.jivesoftware.smack.ConnectionListener;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.debugger.SmackDebugger;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smack.util.*;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
import javax.xml.transform.*;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* The EnhancedDebugger is a debugger that allows to debug sent, received and interpreted messages
* The EnhancedDebugger is a debugger that allows to debug sent, received and interpreted messages
* but also provides the ability to send ad-hoc messages composed by the user.<p>
*
* A new EnhancedDebugger will be created for each connection to debug. All the EnhancedDebuggers
* <p/>
* A new EnhancedDebugger will be created for each connection to debug. All the EnhancedDebuggers
* will be shown in the same debug window provided by the class EnhancedDebuggerWindow.
*
*
* @author Gaston Dombiak
*/
public class EnhancedDebugger implements SmackDebugger {
@ -63,23 +76,23 @@ public class EnhancedDebugger implements SmackDebugger {
URL url;
// Load the image icons
url =
Thread.currentThread().getContextClassLoader().getResource("images/nav_left_blue.png");
Thread.currentThread().getContextClassLoader().getResource("images/nav_left_blue.png");
if (url != null) {
packetReceivedIcon = new ImageIcon(url);
}
url =
Thread.currentThread().getContextClassLoader().getResource("images/nav_right_red.png");
Thread.currentThread().getContextClassLoader().getResource("images/nav_right_red.png");
if (url != null) {
packetSentIcon = new ImageIcon(url);
}
url =
Thread.currentThread().getContextClassLoader().getResource("images/photo_portrait.png");
Thread.currentThread().getContextClassLoader().getResource("images/photo_portrait.png");
if (url != null) {
presencePacketIcon = new ImageIcon(url);
}
url =
Thread.currentThread().getContextClassLoader().getResource(
"images/question_and_answer.png");
Thread.currentThread().getContextClassLoader().getResource(
"images/question_and_answer.png");
if (url != null) {
iqPacketIcon = new ImageIcon(url);
}
@ -157,8 +170,14 @@ public class EnhancedDebugger implements SmackDebugger {
// data as Smack sees it and not as it's coming in as raw XML.
packetReaderListener = new PacketListener() {
SimpleDateFormat dateFormatter = new SimpleDateFormat("hh:mm:ss aaa");
public void processPacket(Packet packet) {
addReadPacketToTable(dateFormatter, packet);
public void processPacket(final Packet packet) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
addReadPacketToTable(dateFormatter, packet);
}
});
}
};
@ -166,21 +185,37 @@ public class EnhancedDebugger implements SmackDebugger {
// the GUI.
packetWriterListener = new PacketListener() {
SimpleDateFormat dateFormatter = new SimpleDateFormat("hh:mm:ss aaa");
public void processPacket(Packet packet) {
addSentPacketToTable(dateFormatter, packet);
public void processPacket(final Packet packet) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
addSentPacketToTable(dateFormatter, packet);
}
});
}
};
// Create a thread that will listen for any connection closed event
connListener = new ConnectionListener() {
public void connectionClosed() {
statusField.setValue("Closed");
EnhancedDebuggerWindow.connectionClosed(EnhancedDebugger.this);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
statusField.setValue("Closed");
EnhancedDebuggerWindow.connectionClosed(EnhancedDebugger.this);
}
});
}
public void connectionClosedOnError(Exception e) {
statusField.setValue("Closed due to an exception");
EnhancedDebuggerWindow.connectionClosedOnError(EnhancedDebugger.this, e);
public void connectionClosedOnError(final Exception e) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
statusField.setValue("Closed due to an exception");
EnhancedDebuggerWindow.connectionClosedOnError(EnhancedDebugger.this, e);
}
});
}
};
}
@ -192,20 +227,21 @@ public class EnhancedDebugger implements SmackDebugger {
tabbedPane.setToolTipTextAt(0, "Sent and received packets processed by Smack");
messagesTable =
new DefaultTableModel(
new Object[] { "Hide", "Timestamp", "", "", "Message", "Id", "Type", "To", "From" },
0) {
public boolean isCellEditable(int rowIndex, int mColIndex) {
return false;
}
public Class getColumnClass(int columnIndex) {
if (columnIndex == 2 || columnIndex == 3) {
return Icon.class;
}
return super.getColumnClass(columnIndex);
}
new DefaultTableModel(
new Object[]{"Hide", "Timestamp", "", "", "Message", "Id", "Type", "To", "From"},
0) {
public boolean isCellEditable(int rowIndex, int mColIndex) {
return false;
}
};
public Class getColumnClass(int columnIndex) {
if (columnIndex == 2 || columnIndex == 3) {
return Icon.class;
}
return super.getColumnClass(columnIndex);
}
};
JTable table = new JTable(messagesTable);
// Allow only single a selection
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
@ -295,8 +331,8 @@ public class EnhancedDebugger implements SmackDebugger {
receivedText.setForeground(new Color(6, 76, 133));
tabbedPane.add("Raw Received Packets", new JScrollPane(receivedText));
tabbedPane.setToolTipTextAt(
2,
"Raw text of the received packets before Smack process them");
2,
"Raw text of the received packets before Smack process them");
// Add pop-up menu.
menu = new JPopupMenu();
@ -325,32 +361,34 @@ public class EnhancedDebugger implements SmackDebugger {
// Create a special Reader that wraps the main Reader and logs data to the GUI.
ObservableReader debugReader = new ObservableReader(reader);
readerListener = new ReaderListener() {
public void read(String str) {
if (EnhancedDebuggerWindow.PERSISTED_DEBUGGER &&
!EnhancedDebuggerWindow.getInstance().isVisible()) {
// Do not add content if the parent is not visible
return;
}
public void read(String str) {
if (EnhancedDebuggerWindow.PERSISTED_DEBUGGER &&
!EnhancedDebuggerWindow.getInstance().isVisible()) {
// Do not add content if the parent is not visible
return;
}
int index = str.lastIndexOf(">");
if (index != -1) {
receivedText.append(str.substring(0, index + 1));
receivedText.append(NEWLINE);
if (str.length() > index) {
receivedText.append(str.substring(index + 1));
}
}
else {
receivedText.append(str);
}
int index = str.lastIndexOf(">");
if (index != -1) {
receivedText.append(str.substring(0, index + 1));
receivedText.append(NEWLINE);
if (str.length() > index) {
receivedText.append(str.substring(index + 1));
}
};
}
else {
receivedText.append(str);
}
}
};
debugReader.addReaderListener(readerListener);
// Create a special Writer that wraps the main Writer and logs data to the GUI.
ObservableWriter debugWriter = new ObservableWriter(writer);
writerListener = new WriterListener() {
public void write(String str) {
public void write(final String str) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
if (EnhancedDebuggerWindow.PERSISTED_DEBUGGER &&
!EnhancedDebuggerWindow.getInstance().isVisible()) {
// Do not add content if the parent is not visible
@ -362,7 +400,11 @@ public class EnhancedDebugger implements SmackDebugger {
sentText.append(NEWLINE);
}
}
};
});
}
};
debugWriter.addWriterListener(writerListener);
// Assign the reader/writer objects to use the debug versions. The packet reader
@ -386,9 +428,9 @@ public class EnhancedDebugger implements SmackDebugger {
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
adhocMessages.setText(
"<message to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><body></body></message>");
"<message to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><body></body></message>");
}
});
menu.add(menuItem);
@ -397,9 +439,9 @@ public class EnhancedDebugger implements SmackDebugger {
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
adhocMessages.setText(
"<iq type=\"get\" to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><query xmlns=\"\"></query></iq>");
"<iq type=\"get\" to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><query xmlns=\"\"></query></iq>");
}
});
menu.add(menuItem);
@ -408,9 +450,9 @@ public class EnhancedDebugger implements SmackDebugger {
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
adhocMessages.setText(
"<iq type=\"set\" to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><query xmlns=\"\"></query></iq>");
"<iq type=\"set\" to=\"\" id=\""
+ StringUtils.randomString(5)
+ "-X\"><query xmlns=\"\"></query></iq>");
}
});
menu.add(menuItem);
@ -419,7 +461,7 @@ public class EnhancedDebugger implements SmackDebugger {
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
adhocMessages.setText(
"<presence to=\"\" id=\"" + StringUtils.randomString(5) + "-X\"/>");
"<presence to=\"\" id=\"" + StringUtils.randomString(5) + "-X\"/>");
}
});
menu.add(menuItem);
@ -462,56 +504,56 @@ public class EnhancedDebugger implements SmackDebugger {
label.setMinimumSize(new java.awt.Dimension(150, 14));
label.setMaximumSize(new java.awt.Dimension(150, 14));
connPanel.add(
label,
new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
label,
new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
JFormattedTextField field = new JFormattedTextField(connection.getServiceName());
field.setMinimumSize(new java.awt.Dimension(150, 20));
field.setMaximumSize(new java.awt.Dimension(150, 20));
field.setEditable(false);
field.setBorder(null);
connPanel.add(
field,
new GridBagConstraints(1, 0, 1, 1, 1.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
field,
new GridBagConstraints(1, 0, 1, 1, 1.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
// Add the Port information
label = new JLabel("Port: ");
label.setMinimumSize(new java.awt.Dimension(150, 14));
label.setMaximumSize(new java.awt.Dimension(150, 14));
connPanel.add(
label,
new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
label,
new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
field = new JFormattedTextField(new Integer(connection.getPort()));
field.setMinimumSize(new java.awt.Dimension(150, 20));
field.setMaximumSize(new java.awt.Dimension(150, 20));
field.setEditable(false);
field.setBorder(null);
connPanel.add(
field,
new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
field,
new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
// Add the connection's User information
label = new JLabel("User: ");
label.setMinimumSize(new java.awt.Dimension(150, 14));
label.setMaximumSize(new java.awt.Dimension(150, 14));
connPanel.add(
label,
new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
label,
new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
userField = new JFormattedTextField();
userField.setMinimumSize(new java.awt.Dimension(150, 20));
userField.setMaximumSize(new java.awt.Dimension(150, 20));
userField.setEditable(false);
userField.setBorder(null);
connPanel.add(
userField,
new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
userField,
new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
// Add the connection's creationTime information
label = new JLabel("Creation time: ");
label.setMinimumSize(new java.awt.Dimension(150, 14));
label.setMaximumSize(new java.awt.Dimension(150, 14));
connPanel.add(
label,
new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
label,
new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
field = new JFormattedTextField(new SimpleDateFormat("yyyy.MM.dd hh:mm:ss aaa"));
field.setMinimumSize(new java.awt.Dimension(150, 20));
field.setMaximumSize(new java.awt.Dimension(150, 20));
@ -519,16 +561,16 @@ public class EnhancedDebugger implements SmackDebugger {
field.setEditable(false);
field.setBorder(null);
connPanel.add(
field,
new GridBagConstraints(1, 3, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
field,
new GridBagConstraints(1, 3, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
// Add the connection's creationTime information
label = new JLabel("Status: ");
label.setMinimumSize(new java.awt.Dimension(150, 14));
label.setMaximumSize(new java.awt.Dimension(150, 14));
connPanel.add(
label,
new GridBagConstraints(0, 4, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
label,
new GridBagConstraints(0, 4, 1, 1, 0.0, 0.0, 21, 0, new Insets(0, 0, 0, 0), 0, 0));
statusField = new JFormattedTextField();
statusField.setMinimumSize(new java.awt.Dimension(150, 20));
statusField.setMaximumSize(new java.awt.Dimension(150, 20));
@ -536,8 +578,8 @@ public class EnhancedDebugger implements SmackDebugger {
statusField.setEditable(false);
statusField.setBorder(null);
connPanel.add(
statusField,
new GridBagConstraints(1, 4, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
statusField,
new GridBagConstraints(1, 4, 1, 1, 0.0, 0.0, 10, 2, new Insets(0, 0, 0, 0), 0, 0));
// Add the connection panel to the information panel
informationPanel.add(connPanel, BorderLayout.NORTH);
@ -547,20 +589,20 @@ public class EnhancedDebugger implements SmackDebugger {
packetsPanel.setBorder(BorderFactory.createTitledBorder("Transmitted Packets"));
statisticsTable =
new DefaultTableModel(new Object[][] { { "IQ", new Integer(0), new Integer(0)}, {
"Message", new Integer(0), new Integer(0)
new DefaultTableModel(new Object[][]{{"IQ", new Integer(0), new Integer(0)}, {
"Message", new Integer(0), new Integer(0)
}, {
"Presence", new Integer(0), new Integer(0)
"Presence", new Integer(0), new Integer(0)
}, {
"Other", new Integer(0), new Integer(0)
"Other", new Integer(0), new Integer(0)
}, {
"Total", new Integer(0), new Integer(0)
"Total", new Integer(0), new Integer(0)
}
}, new Object[] { "Type", "Received", "Sent" }) {
public boolean isCellEditable(int rowIndex, int mColIndex) {
return false;
}
};
}, new Object[]{"Type", "Received", "Sent"}) {
public boolean isCellEditable(int rowIndex, int mColIndex) {
return false;
}
};
JTable table = new JTable(statisticsTable);
// Allow only single a selection
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
@ -574,7 +616,7 @@ public class EnhancedDebugger implements SmackDebugger {
}
public Reader newConnectionReader(Reader newReader) {
((ObservableReader)reader).removeReaderListener(readerListener);
((ObservableReader) reader).removeReaderListener(readerListener);
ObservableReader debugReader = new ObservableReader(newReader);
debugReader.addReaderListener(readerListener);
reader = debugReader;
@ -582,19 +624,25 @@ public class EnhancedDebugger implements SmackDebugger {
}
public Writer newConnectionWriter(Writer newWriter) {
((ObservableWriter)writer).removeWriterListener(writerListener);
((ObservableWriter) writer).removeWriterListener(writerListener);
ObservableWriter debugWriter = new ObservableWriter(newWriter);
debugWriter.addWriterListener(writerListener);
writer = debugWriter;
return writer;
}
public void userHasLogged(String user) {
userField.setText(user);
EnhancedDebuggerWindow.userHasLogged(this, user);
// Add the connection listener to the connection so that the debugger can be notified
// whenever the connection is closed.
connection.addConnectionListener(connListener);
public void userHasLogged(final String user) {
final EnhancedDebugger debugger = this;
SwingUtilities.invokeLater(new Runnable() {
public void run() {
userField.setText(user);
EnhancedDebuggerWindow.userHasLogged(debugger, user);
// Add the connection listener to the connection so that the debugger can be notified
// whenever the connection is closed.
connection.addConnectionListener(connListener);
}
});
}
public Reader getReader() {
@ -635,9 +683,9 @@ public class EnhancedDebugger implements SmackDebugger {
/**
* Adds the received packet detail to the messages table.
*
*
* @param dateFormatter the SimpleDateFormat to use to format Dates
* @param packet the read packet to add to the table
* @param packet the read packet to add to the table
*/
private void addReadPacketToTable(final SimpleDateFormat dateFormatter, final Packet packet) {
SwingUtilities.invokeLater(new Runnable() {
@ -680,16 +728,16 @@ public class EnhancedDebugger implements SmackDebugger {
}
messagesTable.addRow(
new Object[] {
formatXML(packet.toXML()),
dateFormatter.format(new Date()),
packetReceivedIcon,
packetTypeIcon,
messageType,
packet.getPacketID(),
type,
"",
from });
new Object[]{
formatXML(packet.toXML()),
dateFormatter.format(new Date()),
packetReceivedIcon,
packetTypeIcon,
messageType,
packet.getPacketID(),
type,
"",
from});
// Update the statistics table
updateStatistics();
}
@ -698,9 +746,9 @@ public class EnhancedDebugger implements SmackDebugger {
/**
* Adds the sent packet detail to the messages table.
*
*
* @param dateFormatter the SimpleDateFormat to use to format Dates
* @param packet the sent packet to add to the table
* @param packet the sent packet to add to the table
*/
private void addSentPacketToTable(final SimpleDateFormat dateFormatter, final Packet packet) {
SwingUtilities.invokeLater(new Runnable() {
@ -743,16 +791,16 @@ public class EnhancedDebugger implements SmackDebugger {
}
messagesTable.addRow(
new Object[] {
formatXML(packet.toXML()),
dateFormatter.format(new Date()),
packetSentIcon,
packetTypeIcon,
messageType,
packet.getPacketID(),
type,
to,
"" });
new Object[]{
formatXML(packet.toXML()),
dateFormatter.format(new Date()),
packetSentIcon,
packetTypeIcon,
messageType,
packet.getPacketID(),
type,
to,
""});
// Update the statistics table
updateStatistics();
@ -769,7 +817,8 @@ public class EnhancedDebugger implements SmackDebugger {
try {
tFactory.setAttribute("indent-number", new Integer(2));
}
catch (IllegalArgumentException e) {}
catch (IllegalArgumentException e) {
}
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
@ -809,7 +858,7 @@ public class EnhancedDebugger implements SmackDebugger {
}
return str;
}
/**
* Returns true if the debugger's connection with the server is up and running.
*
@ -821,34 +870,32 @@ public class EnhancedDebugger implements SmackDebugger {
/**
* Stops debugging the connection. Removes any listener on the connection.
*
*/
void cancel() {
connection.removeConnectionListener(connListener);
connection.removePacketListener(packetReaderListener);
connection.removePacketWriterListener(packetWriterListener);
((ObservableReader)reader).removeReaderListener(readerListener);
((ObservableWriter)writer).removeWriterListener(writerListener);
((ObservableReader) reader).removeReaderListener(readerListener);
((ObservableWriter) writer).removeWriterListener(writerListener);
messagesTable = null;
}
/**
* An ad-hoc packet is like any regular packet but with the exception that it's intention is
* An ad-hoc packet is like any regular packet but with the exception that it's intention is
* to be used only <b>to send packets</b>.<p>
*
* The whole text to send must be passed to the constructor. This implies that the client of
* this class is responsible for sending a valid text to the constructor.
*
* <p/>
* The whole text to send must be passed to the constructor. This implies that the client of
* this class is responsible for sending a valid text to the constructor.
*/
private class AdHocPacket extends Packet {
private String text;
/**
* Create a new AdHocPacket with the text to send. The passed text must be a valid text to
* Create a new AdHocPacket with the text to send. The passed text must be a valid text to
* send to the server, no validation will be done on the passed text.
*
* @param text the whole text of the packet to send
*
* @param text the whole text of the packet to send
*/
public AdHocPacket(String text) {
this.text = text;
@ -864,6 +911,7 @@ public class EnhancedDebugger implements SmackDebugger {
* Listens for debug window popup dialog events.
*/
private class PopupListener extends MouseAdapter {
JPopupMenu popup;
PopupListener(JPopupMenu popupMenu) {
@ -886,6 +934,7 @@ public class EnhancedDebugger implements SmackDebugger {
}
private class SelectionListener implements ListSelectionListener {
JTable table;
// It is necessary to keep the table since it is not possible
@ -893,6 +942,7 @@ public class EnhancedDebugger implements SmackDebugger {
SelectionListener(JTable table) {
this.table = table;
}
public void valueChanged(ListSelectionEvent e) {
if (table.getSelectedRow() == -1) {
// Clear the messageTextArea since there is none packet selected
@ -901,7 +951,7 @@ public class EnhancedDebugger implements SmackDebugger {
else {
// Set the detail of the packet in the messageTextArea
messageTextArea.setText(
(String) table.getModel().getValueAt(table.getSelectedRow(), 0));
(String) table.getModel().getValueAt(table.getSelectedRow(), 0));
// Scroll up to the top
messageTextArea.setCaretPosition(0);
}