statisticspanel.java

用java写的ftp服务器程序

// $Id: StatisticsPanel.java 306759 2005-10-06 11:39:53 +0530 (Thu, 06 Oct 2005) rana_b $
/*
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.ftpserver.gui;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import org.apache.ftpserver.ftplet.FileObject;
import org.apache.ftpserver.interfaces.FileObserver;
import org.apache.ftpserver.interfaces.IConnection;
import org.apache.ftpserver.interfaces.IFtpConfig;
import org.apache.ftpserver.interfaces.IFtpStatistics;
import org.apache.ftpserver.interfaces.StatisticsObserver;
import org.apache.ftpserver.util.DateUtils;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.event.EventListenerList;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.TableModel;

/**
 * This panel displays all the global statistics information.
 * 
 * @author <a href="mailto:[e-mail]">Rana Bhattacharyya</a>
 */
public 
class StatisticsPanel extends PluginPanel 
                      implements StatisticsObserver, FileObserver, TableModel {

    private static final long serialVersionUID = -8316984131627702453L;
    
    private final static int I_START_TIME        = 0;
    private final static int I_DIR_CREATED       = 1;
    private final static int I_DIR_REMOVED       = 2;
    private final static int I_FILE_UPLOAD       = 3;
    private final static int I_FILE_DOWNLOAD     = 4;
    private final static int I_FILE_REMOVED      = 5;
    private final static int I_UPLOAD_BYTES      = 6;
    private final static int I_DOWNLOAD_BYTES    = 7;
    private final static int I_CURR_LOGINS       = 8;
    private final static int I_TOTAL_LOGINS      = 9;
    private final static int I_CURR_ANON_LOGINS  = 10;
    private final static int I_TOTAL_ANON_LOGINS = 11;
    private final static int I_CURR_CONS         = 12;
    private final static int I_TOTAL_CONS        = 13;
    
    private final static String[] COL_NAMES = {
            "Name",  
            "Value"
    };

    private final static String[] STAT_NAMES = {
            "Server start time",
            "Number of directories created",
            "Number of directories removed",
            "Number of files uploaded",
            "Number of files downloaded",
            "Number of files deleted",
            "Uploaded bytes",
            "Downloaded bytes",
            "Current logins",
            "Total logins",
            "Current anonymous logins",
            "Total anonymous logins",
            "Current connections",
            "Total connections"
    };

    private IFtpConfig m_ftpConfig;
    private IFtpStatistics m_statistics;
    private String m_data[] = new String[STAT_NAMES.length];
    private EventListenerList m_listeners = new EventListenerList();
    
    /**
     * Constructor - create all UI components.
     */
    public StatisticsPanel(PluginPanelContainer container) {
        super(container);
        
        // initialize string array
        for(int i=0; i<m_data.length; ++i) {
            m_data[i] = "";
        }
        
        initComponents();
    } 
    
    
    /**
     * Initialize all UI components.
     */
    private void initComponents() {
        
        setLayout(new BorderLayout());
        
        // top table
        JTable dataTable = new JTable(this); 
        JScrollPane scrollPane = new JScrollPane(dataTable, 
                                                 JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                                                 JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        add(scrollPane, BorderLayout.CENTER);
        
        // reload statistics
        JPanel btnPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
        add(btnPanel, BorderLayout.SOUTH);
        
        JButton reloadButton = new JButton("Reload");
        btnPanel.add(reloadButton);
        reloadButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                refresh(m_ftpConfig);
            }
        });
    }
    
    /**
     * Get column class - always string
     */
    public Class getColumnClass(int index) {
        return String.class;
    }
    
    /**
     * Get column count.
     */
    public int getColumnCount() {
        return COL_NAMES.length;
    }
    
    /**
     * Get column name.
     */
    public String getColumnName(int index) {
        return COL_NAMES[index];
    } 
    
    /**
     * Get row count.
     */
    public int getRowCount() {
        return STAT_NAMES.length;
    }
    
    /**
     * Is cell editable - currently false.
     */
    public boolean isCellEditable(int row, int col) {
        return false;
    }

    /**
     * Get table cell value.
     */
    public Object getValueAt(int rowIndex, int columnIndex) {
        if(columnIndex == 0) {
            return STAT_NAMES[rowIndex];
        }
        else {
            return m_data[rowIndex];
        }
    }
    
    /**
     * Set table cell value.
     */
    public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
    }
    
    /**
     * Add table model listener.
     */
    public void addTableModelListener(TableModelListener l) {
        m_listeners.add(TableModelListener.class, l);
    } 
    
    /**
     * Remove table model listener.
     */
    public void removeTableModelListener(TableModelListener l) {
        m_listeners.remove(TableModelListener.class, l);
    }

    /**
     * Set value.
     */
    private void setValue(int index, String val) {
                
        // set string data
        if(val == null) {
            val = "";
        }
        m_data[index] = val;
        
        // notify table listeners
        TableModelEvent e = new TableModelEvent(StatisticsPanel.this, index, index, 1);
        Object[] listeners = m_listeners.getListenerList();
        for (int i = listeners.length-2; i>=0; i-=2) {
            if (listeners[i]==TableModelListener.class) {
                ((TableModelListener)listeners[i+1]).tableChanged(e);
            }
        }
    }
    
    /** 
     * Refresh the ftp configuration
     */
    public void refresh(IFtpConfig ftpConfig) {
        m_ftpConfig = ftpConfig;
        if (m_ftpConfig != null) {
            m_statistics = (IFtpStatistics)m_ftpConfig.getFtpStatistics();
            m_statistics.setObserver(this);
            m_statistics.setFileObserver(this);
            
            // reset component values
            String startTime = DateUtils.getISO8601Date(m_statistics.getStartTime().getTime());
            setValue(I_START_TIME, startTime);
            notifyMkdir();
            notifyRmdir();
            notifyUpload();