} else {
                // Already started
            }
            if (socket != null) {
                // Make sure the right buttons are enabled
                start_button.setEnabled(false);
                stop_button.setEnabled(true);
                setStatus(STATUS_ACTIVE);
            }
        }

        /**
         * Stop talking to the server
         */
        public void stop() {
            if (socket != null) {
                // Close all the streams and socket
                if (out != null) {
                    try {
                        out.close();
                    } catch (IOException ioe) {
                    }
                    out = null;
                }
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException ioe) {
                    }
                    in = null;
                }
                if (socket != null) {
                    try {
                        socket.close();
                    } catch (IOException ioe) {
                    }
                    socket = null;
                }
            } else {
                // Already stopped
            }
            // Make sure the right buttons are enabled
            start_button.setEnabled(true);
            stop_button.setEnabled(false);
            setStatus(STATUS_STOPPED);
        }

        /**
         * Background thread used to receive data from
         * the server.
         */
        public void run() {
            Long            id;
            Integer         message_type;
            String          target;
            String          soap;
            SOAPMonitorData data;
            int             selected;
            int             row;
            boolean         update_needed;
            while (socket != null) {
                try {
                    // Get the data from the server
                    message_type = (Integer) in.readObject();
                    // Process the data depending on its type
                    switch (message_type.intValue()) {
                        case SOAPMonitorConstants.SOAP_MONITOR_REQUEST:
                            // Get the id, target and soap info
                            id = (Long) in.readObject();
                            target = (String) in.readObject();
                            soap = (String) in.readObject();
                            // Add new request data to the table
                            data = new SOAPMonitorData(id,target,soap);
                            model.addData(data);
                            // If "most recent" selected then update
                            // the details area if needed
                            selected = table.getSelectedRow();
                            if ((selected == 0) && model.filterMatch(data)) {
                                valueChanged(null);
                            }
                            break;
                        case SOAPMonitorConstants.SOAP_MONITOR_RESPONSE:
                            // Get the id and soap info
                            id = (Long) in.readObject();
                            soap = (String) in.readObject();
                            data = model.findData(id);
                            if (data != null) {
                                update_needed = false;
                                // Get the selected row
                                selected = table.getSelectedRow();
                                // If "most recent", then always
                                // update details area
                                if (selected == 0) {
                                    update_needed = true;
                                }
                                // If the data being updated is
                                // selected then update details
                                row = model.findRow(data);
                                if ((row != -1) && (row == selected)) {
                                    update_needed = true;
                                }
                                // Set the response and update table
                                data.setSOAPResponse(soap);
                                model.updateData(data);
                                // Refresh details area (if needed)
                                if (update_needed) {
                                    valueChanged(null);
                                }
                            }
                            break;
                    }

                } catch (Exception e) {
                    // Exceptions are expected here when the
                    // server communication has been terminated.
                    if (stop_button.isEnabled()) {
                        stop();
                        setErrorStatus(STATUS_CLOSED);
                    }
                }
            }
        }

        /**
         * Listener to handle table selection changes
         */
        public void valueChanged(ListSelectionEvent e) {
            int row = table.getSelectedRow();
            // Check if they selected a specific row
            if (row > 0) {
                remove_button.setEnabled(true);
            } else {
                remove_button.setEnabled(false);
            }
            // Check for "most recent" selection
            if (row == 0) {
                row = model.getRowCount() - 1;
                if (row == 0) {
                    row = -1;
                }
            }
            if (row == -1) {
                // Clear the details panel
                details_time_value.setText("");
                details_target_value.setText("");
                details_status_value.setText("");
                request_text.setText("");
                response_text.setText("");
            } else {
                // Show the details for the row
                SOAPMonitorData soap = model.getData(row);
                details_time_value.setText(soap.getTime());
                details_target_value.setText(soap.getTargetService());
                details_status_value.setText(soap.getStatus());
                if (soap.getSOAPRequest() == null) {
                    request_text.setText("");
                } else {
                    request_text.setText(soap.getSOAPRequest());
                    request_text.setCaretPosition(0);
                }
                if (soap.getSOAPResponse() == null) {
                    response_text.setText("");
                } else {
                    response_text.setText(soap.getSOAPResponse());
                    response_text.setCaretPosition(0);
                }
            }
        }

        /**
         * Listener to handle button actions
         */
        public void actionPerformed(ActionEvent e) {
            // Check if the user pressed the remove button
            if (e.getSource() == remove_button) {
                int row = table.getSelectedRow();
                model.removeRow(row);
                table.clearSelection();
                table.repaint();
                valueChanged(null);
            }
            // Check if the user pressed the remove all button
            if (e.getSource() == remove_all_button) {
                model.clearAll();
                table.setRowSelectionInterval(0,0);
                table.repaint();
                valueChanged(null);
            }
            // Check if the user pressed the filter button
            if (e.getSource() == filter_button) {
                filter.showDialog();
                if (filter.okPressed()) {
                    // Update the display with new filter
                    model.setFilter(filter);
                    table.repaint();
                }
            }
            // Check if the user pressed the start button
            if (e.getSource() == start_button) {
                start();
            }
            // Check if the user pressed the stop button
            if (e.getSource() == stop_button) {
                stop();
            }
            // Check if the user wants to switch layout
            if (e.getSource() == layout_button) {
                details_panel.remove(details_soap);
                details_soap.removeAll();
                if (details_soap.getOrientation() == JSplitPane.HORIZONTAL_SPLIT) {
                    details_soap = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
                } else {
                    details_soap = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
                }
                details_soap.setTopComponent(request_panel);
                details_soap.setRightComponent(response_panel);
                details_soap.setResizeWeight(.5);
                details_panel.add(details_soap, BorderLayout.CENTER);
                details_panel.validate();
                details_panel.repaint();
            }
            // Check if the user is changing the reflow option
            if (e.getSource() == reflow_xml) {
                request_text.setReflowXML(reflow_xml.isSelected());
                response_text.setReflowXML(reflow_xml.isSelected());
            }
        }
    }

    /**
     * This class represend the data for a SOAP request/response pair
     */
    class SOAPMonitorData {

        /**
         * Private data
         */
        private Long    id;
        private String  time;
        private String  target;
        private String  soap_request;
        private String  soap_response;

        /**
         * Constructor
         */
        public SOAPMonitorData(Long id, String target, String soap_request) {
            this.id = id;
            // A null id is used to signal that the "most recent" entry
            // is being created.
            if (id == null) {
                this.time = "Most Recent";
                this.target = "---";
                this.soap_request = null;
                this.soap_response = null;
            } else {
                this.time = DateFormat.getTimeInstance().format(new Date());
                this.target = target;
                this.soap_request = soap_request;
                this.soap_response = null;
            }
        }

        /**
         * Get the id for the SOAP message
         */
        public Long getId() {
            return id;
        }

        /**
         * Get the time the SOAP request was received by the applet
         */
        public String getTime() {
            return time;
        }

        /**
         * Get the SOAP request target service name
         */
        public String getTargetService() {
            return target;
        }

        /**
         * Get the status of the request
         */
        public String getStatus() {
            String status = "---";
            if (id != null) {
                status = "Complete";
                if (soap_response == null) {
                    status = "Active";
                }
            }
            return status;
        }

        /**
         * Get the request SOAP contents
         */
        public String getSOAPRequest() {
            return soap_request;
        }

        /**
         * Set the resposne SOAP contents
         */
        public void setSOAPResponse(String response) {
            soap_response = response;
        }

        /**
         * Get the response SOAP contents
         */
        public String getSOAPResponse() {
            return soap_response;
        }
    }

    /**
     * This table model is used to manage the table displayed
     * at the top of the page to show all the SOAP messages
     * we have received and to control which message details are
     * to be displayed on the bottom of the page.
     */
    class SOAPMonitorTableModel extends AbstractTableModel {

        /**
         * Column titles
         */
        private final String[] column_names = { "Time",
                                                "Target Service",
                                                "Status" };
        /**                                        
         * Private data
         */
        private Vector  data;
        private Vector  filter_include;
        private Vector  filter_exclude;
        private boolean filter_active;
        private boolean filter_complete;
        private Vector  filter_data;

        /**
         * Constructor
         */
        public SOAPMonitorTableModel() {
            data = new Vector();
            // Add "most recent" entry to top of table
            SOAPMonitorData soap = new SOAPMonitorData(null,null,null);
            data.addElement(soap);
            filter_include = null;
            filter_exclude = null;
            filter_active = false;
            filter_complete = false;
            filter_data = null;
            // By default, exclude NotificationService and
            // EventViewerService messages
            filter_exclude = new Vector();
            filter_exclude.addElement("NotificationService");
            filter_exclude.addElement("EventViewerService");
            filter_data = new Vector();
            filter_data.addElement(soap);
        }

        /**
         * Get column count (part of table model interface)
         */
        public int getColumnCount() {
            return column_names.length;