sendmessagethread.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: SendMessageThread.java,v 1.7 2001/05/07 12:37:22 kunugi Exp $
**
** Copyright (c) 2000-2001 Jeff Gay
** on behalf of ICEMail.org <http://www.icemail.org>
** Copyright (c) 1998-2000 by Timothy Gerard Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
*/

package org.icemail.mail;

import java.util.Date;

import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Point;

import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JProgressBar;

import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Store;
import javax.mail.Transport;

import org.icemail.util.AWTUtilities; 
import org.icemail.util.ComponentFactory; 
import org.icemail.util.UserProperties;


/**
 * SendMessageThread presents a dialog which displays the progress of sending
 * a specific message.
 * <p>
 * The message is checked and completed before sending. It may also be saved
 * into the configured 'sent' folder.
 * <p>
 * After the message is sent, this thread also disposes of the parent frame, i.e. composer.
 *
 * @see ComposeFrame
 */
public class SendMessageThread
  extends Thread
{
  private ComposeFrame  frame_;
  private Message       message_;

  private JDialog       dialog_;
  private JProgressBar  progress_;

  /**
   * Create a thread of execution for sending the given message, and saving
   * the message to the configured 'sent' folder if necessary.
   *
   * @param frame frame of the message composer
   * @param message message to send
   */
  public
  SendMessageThread( ComposeFrame frame, Message message )
    throws MessagingException {
    super();

    frame_ = frame;
    message_ = message;

    // verify the message contents now, before sending
    Address[] xaddresses = message_.getAllRecipients();
    if ( xaddresses == null || xaddresses.length < 1 ) {
      String xstring = ICEMail.getBundle().getString( "Exception.noRecipients" );
      throw new MessagingException( xstring );
    }
  }

  /**
   * <p>
   * Implementation of Thread.run()
   */
  public void
  run() {
    dialog_ = new JDialog( frame_, false );

    dialog_.setTitle( ICEMail.getBundle().getString( "SendMessage.Title" ) );

    Container content = dialog_.getContentPane();
    content.setLayout( new GridBagLayout() );

    JLabel lbl;
    lbl = ComponentFactory.getLabel( ICEMail.getBundle(), "SendMessage.Sending" );
    lbl.setHorizontalAlignment( JLabel.CENTER );
    AWTUtilities.constrain( content, lbl, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.CENTER, 0, 0, 0, 1, 1.0, 0.0 );

    progress_ = new JProgressBar();
    progress_.setValue( 0 );
    progress_.setMinimum( 0 );
    progress_.setMaximum( 100 );
    AWTUtilities.constrain( content, progress_, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.CENTER, 0, 1, 0, 1, 1.0, 0.0 );

    dialog_.pack();

    Dimension sz = dialog_.getSize();
    if ( sz.width < 350 ) {
      sz.width = 350;
      dialog_.setSize( sz );
    }

    Point loc = AWTUtilities.computeDialogLocation( dialog_ );

    dialog_.setLocation( loc.x, loc.y );

    dialog_.show();

    String xstate = "building";
    try {
    // set required headers, if necessary
      Date xsentdate = message_.getSentDate();
      if ( xsentdate == null ) {
        message_.setSentDate( new Date() );
      }

      progress_.setValue( 10 );

      Address[] xaddresses = message_.getFrom();
      if ( xaddresses == null || xaddresses.length < 1 ) {
        message_.setFrom( MessageUtilities.getDefaultFromAddress() );
        xaddresses = message_.getFrom();
      }

      progress_.setValue( 20 );

    // FIXME; how to set Sender??
      progress_.setValue( 30 );

      xaddresses = message_.getReplyTo();
      if ( xaddresses == null || xaddresses.length < 1 ) {
        xaddresses = new Address[1];
        xaddresses[0] = MessageUtilities.getDefaultReplyTo();
        message_.setReplyTo( xaddresses );
      }

      progress_.setValue( 40 );

      xstate = "sending";
      Transport.send( message_ );

      progress_.setValue( 90 );

      xstate = "saving to sent";
      String xpath = UserProperties.getProperty( "sentFolderPath", null );
      if ( xpath != null && xpath.length() > 0 ) {
        MailUtilities.saveMessage( message_, xpath );
      }

      progress_.setValue( 100 );

      dialog_.dispose();

      frame_.dispose( true );
    } catch ( MessagingException ex ) {
      dialog_.dispose();

      Object[] xargs = new Object[2];
      xargs[0] = xstate;
      xargs[1] = ex.getMessage();
      ComponentFactory.showDialog( ICEMail.getBundle(), "SendMessage.SendError",
                                   0, JOptionPane.ERROR_MESSAGE, xargs );
    }
  }

}