mapdemo.java

业界著名的tomcat服务器的最新6.0的源代码。

            this.map = map;
            
            this.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);

            //final JTable table = new JTable(data, columnNames);
            table = new JTable(dataModel);

            table.setPreferredScrollableViewportSize(new Dimension(WIDTH, 150));
            for ( int i=0; i<table.getColumnCount(); i++ ) {
                TableColumn tm = table.getColumnModel().getColumn(i);
                tm.setCellRenderer(new ColorRenderer());
            }


            if (DEBUG) {
                table.addMouseListener(new MouseAdapter() {
                    public void mouseClicked(MouseEvent e) {
                        printDebugData(table);
                    }
                });
            }
            
            //setLayout(new GridLayout(5, 0));
            setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

            //Create the scroll pane and add the table to it.
            JScrollPane scrollPane = new JScrollPane(table);

            //Add the scroll pane to this panel.
            add(scrollPane);
            
            //create a add value button
            JPanel addpanel = new JPanel();
            addpanel.setPreferredSize(new Dimension(WIDTH,30));
            addpanel.add(createButton("Add","add"));
            addpanel.add(txtAddKey);
            addpanel.add(txtAddValue);
            addpanel.setMaximumSize(new Dimension(WIDTH,30));
            add(addpanel);
            
            //create a remove value button
            JPanel removepanel = new JPanel( );
            removepanel.setPreferredSize(new Dimension(WIDTH,30));
            removepanel.add(createButton("Remove","remove"));
            removepanel.add(txtRemoveKey);
            removepanel.setMaximumSize(new Dimension(WIDTH,30));
            add(removepanel);

            //create a change value button
            JPanel changepanel = new JPanel( );
            changepanel.add(createButton("Change","change"));
            changepanel.add(txtChangeKey);
            changepanel.add(txtChangeValue);
            changepanel.setPreferredSize(new Dimension(WIDTH,30));
            changepanel.setMaximumSize(new Dimension(WIDTH,30));
            add(changepanel);


            //create sync button
            JPanel syncpanel = new JPanel( );
            syncpanel.add(createButton("Synchronize","sync"));
            syncpanel.add(createButton("Replicate","replicate"));
            syncpanel.add(createButton("Random","random"));
            syncpanel.setPreferredSize(new Dimension(WIDTH,30));
            syncpanel.setMaximumSize(new Dimension(WIDTH,30));
            add(syncpanel);


        }
        
        public JButton createButton(String text, String command) {
            JButton button = new JButton(text);
            button.setActionCommand(command);
            button.addActionListener(this);
            return button;
        }
        
        public void actionPerformed(ActionEvent e) {
            System.out.println(e.getActionCommand());
            if ( "add".equals(e.getActionCommand()) ) {
                System.out.println("Add key:"+txtAddKey.getText()+" value:"+txtAddValue.getText());
                map.put(txtAddKey.getText(),new StringBuffer(txtAddValue.getText()));
            }
            if ( "change".equals(e.getActionCommand()) ) {
                System.out.println("Change key:"+txtChangeKey.getText()+" value:"+txtChangeValue.getText());
                StringBuffer buf = (StringBuffer)map.get(txtChangeKey.getText());
                if ( buf!=null ) {
                    buf.delete(0,buf.length());
                    buf.append(txtChangeValue.getText());
                    map.replicate(txtChangeKey.getText(),true);
                } else {
                    buf = new StringBuffer();
                    buf.append(txtChangeValue.getText());
                    map.put(txtChangeKey.getText(),buf);
                }
            }
            if ( "remove".equals(e.getActionCommand()) ) {
                System.out.println("Remove key:"+txtRemoveKey.getText());
                map.remove(txtRemoveKey.getText());
            }
            if ( "sync".equals(e.getActionCommand()) ) {
                System.out.println("Syncing from another node.");
                map.transferState();
            }
            if ( "random".equals(e.getActionCommand()) ) {
                Thread t = new Thread() {
                    public void run() {
                        for (int i = 0; i < 100; i++) {
                            String key = Arrays.toString(UUIDGenerator.randomUUID(false));
                            map.put(key, key);
                            dataModel.fireTableDataChanged();
                            table.paint(table.getGraphics());
                            try {
                                Thread.sleep(500);
                            } catch (InterruptedException x) {
                                Thread.currentThread().interrupted();
                            }
                        }
                    }
                };
                t.start();
            }
            
            if ( "replicate".equals(e.getActionCommand()) ) {
                System.out.println("Replicating out to the other nodes.");
                map.replicate(true);
            }
            dataModel.getValueAt(-1,-1);
        }

        private void printDebugData(JTable table) {
            int numRows = table.getRowCount();
            int numCols = table.getColumnCount();
            javax.swing.table.TableModel model = table.getModel();

            System.out.println("Value of data: ");
            for (int i = 0; i < numRows; i++) {
                System.out.print("    row " + i + ":");
                for (int j = 0; j < numCols; j++) {
                    System.out.print("  " + model.getValueAt(i, j));
                }
                System.out.println();
            }
            System.out.println("--------------------------");
        }

        /**
         * Create the GUI and show it.  For thread safety,
         * this method should be invoked from the
         * event-dispatching thread.
         */
        public static SimpleTableDemo createAndShowGUI(LazyReplicatedMap map, String title) {
            //Make sure we have nice window decorations.
            JFrame.setDefaultLookAndFeelDecorated(true);

            //Create and set up the window.
            JFrame frame = new JFrame("SimpleTableDemo - "+title);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            //Create and set up the content pane.
            SimpleTableDemo newContentPane = new SimpleTableDemo(map);
            newContentPane.setOpaque(true); //content panes must be opaque
            frame.setContentPane(newContentPane);

            //Display the window.
            frame.setSize(450,250);
            newContentPane.setSize(450,300);
            frame.pack();
            frame.setVisible(true);
            return newContentPane;
        }
    }
    
    static class ColorRenderer extends DefaultTableCellRenderer {
        
        public ColorRenderer() {
            super();
        }

        public Component getTableCellRendererComponent
            (JTable table, Object value, boolean isSelected,
             boolean hasFocus, int row, int column) {
            Component cell = super.getTableCellRendererComponent
                             (table, value, isSelected, hasFocus, row, column);
            cell.setBackground(Color.WHITE);
            if ( row > 0 ) {
                Color color = null;
                boolean primary = ( (Boolean) table.getValueAt(row, 3)).booleanValue();
                boolean proxy = ( (Boolean) table.getValueAt(row, 4)).booleanValue();
                boolean backup = ( (Boolean) table.getValueAt(row, 5)).booleanValue();
                if (primary) color = Color.GREEN;
                else if (proxy) color = Color.RED;
                else if (backup) color = Color.BLUE;
                if ( color != null ) cell.setBackground(color);
            }
//            System.out.println("Row:"+row+" Column:"+column+" Color:"+cell.getBackground());
//            cell.setBackground(bkgndColor);
//            cell.setForeground(fgndColor);

            return cell;
        }
        
        
    }


}