sharedemo.java

jxta-cms-src-2.4.zip 是官网上的比较稳定的CMS源代码。目前是最稳定的高版本。

/*
 * Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: ShareDemo.java,v 1.9 2002/04/20 18:26:02 rmjohnson Exp $
 *
 */

package net.jxta.test;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import java.lang.reflect.InvocationTargetException;
import java.io.File;
import java.io.IOException;

import net.jxta.peergroup.PeerGroup;
import net.jxta.peergroup.PeerGroupFactory;
import net.jxta.exception.PeerGroupException;

import net.jxta.impl.peergroup.Platform;
import net.jxta.impl.peergroup.GenericPeerGroup;

import net.jxta.share.*;
import net.jxta.share.metadata.*;

/**
 * Simple application that demonstrates how to share a file using CMS.
 * 
 * @see SearchDemo
 * @see MetadataShareDemo
 * @see net.jxta.share.ContentManager
 * @see net.jxta.share.CMS
 * @version $Revision: 1.9 $
 */
public class ShareDemo {

    private PeerGroup netPeerGroup  = null;
    private CMS cms = null;

    static public void main(String args[]) {
	//start ShareDemo
        new ShareDemo();
    }
    
    public ShareDemo() {
        startJxta();

	//adds a search listener that monitors incoming list requests
	cms.addSearchListener(new MySearchListener());

        ShareWindow window = new ShareWindow();
        window.setVisible(true);
    }

    /**
     * initializes NetPeerGroup and the CMS
     */
    private void startJxta() {
	try {
	    // create, and Start the default jxta NetPeerGroup
	    netPeerGroup = PeerGroupFactory.newNetPeerGroup();
	    
	    //uncomment the following line if you want to start the app defined
	    // the NetPeerGroup Advertisement (by default it's the shell)
	    // in this case we want use jxta directly.

	    // netPeerGroup.startApp(null);
	    
	    //instanciate and initialize a content management service for 
	    //the NetPeerGroup
	    cms = new CMS();
	    cms.init(netPeerGroup, null, null);
	    
	    //set up a ShareDemo directory inside the JXTA_HOME directory
	    String homedir = System.getProperty("JXTA_HOME");
	    homedir = (homedir != null) ? homedir + "ShareDemo" : "ShareDemo";
	    	    
	    //start CMS, creating a directory named ShareDemo to store the
	    // ContentAdvertisement cache in.
	    if(cms.startApp(new File(homedir)) == -1) {
		System.out.println("CMS initialization failed");
		System.exit(-1);
	    }
	    
	} catch ( PeerGroupException e) {
	    // could not instanciate the group, print the stack and exit
	    System.out.println("fatal error : group creation failure");
	    e.printStackTrace();
	    System.exit(1);
	} 
    }

    /**
     * A simple implementation of a SearchListener.
     */
    class MySearchListener implements SearchListener {

	/**
	 * This method is called every time a list request is recieved. This
	 * implementation prints the query string to standard output when it is
	 * called.
	 */
	public void queryReceived(String queryString) {
	    System.out.println("List request with query \"" + queryString
			       + "\" received.");
	}
    }

    /**
     * Inner class that defines the ShareDemo GUI
     */
    public class ShareWindow extends Frame implements ActionListener {
	JFileChooser fc = new JFileChooser(new File("."));
        Button shareButton;
        List fileList;

        public ShareWindow() {
            super("Share Demo");
            setSize(450, 250);
            addWindowListener(new WindowMonitor());

            Panel toolbar = new Panel();
            toolbar.setLayout(new FlowLayout(FlowLayout.LEFT));

            shareButton = new Button("Share");
            shareButton.addActionListener(this);
            toolbar.add(shareButton);

            add(toolbar, BorderLayout.NORTH);

            fileList = new java.awt.List();
            add(fileList, BorderLayout.CENTER);
            
            //immediately fill the list with content that is being shared
            updateLocalFiles();
        }

	public void actionPerformed(ActionEvent e) {
	    System.out.println(e.getActionCommand());
	    
	    //handle the event of the "Share" button being clicked
	    if (e.getSource().equals(shareButton)) {
		//prompt the user to choose a file to share
		int returnVal = fc.showOpenDialog(this);
		
		if (returnVal == JFileChooser.APPROVE_OPTION) {
		    File file = fc.getSelectedFile();
		    
		    //this is where a real application would open the file.
		    System.out.println("Sharing: " + file.getName() + ".");
		    try {
			//ContentManager.share() will automatically create a
			//ContentAdvertisement for a file and begin sharing it.
			//If more control in the construction of the
			//ContentAdvertisement is needed, there are also
			//overloaded versions of share() that allow the
			//advertised name, content type, and other metadata to
			//in the advertisement to be specified.
			cms.getContentManager().share(file);
			
			//update the list of shared content
			updateLocalFiles();
			
		    } catch (IOException ex) {
			System.out.println("Share command failed.");
		    }		    		    
		} else {
		    System.out.println("Share command cancelled by user.");
		}
	    }
	}
	
	/**
	 * Refreshes the list of shared content
	 */
        private void updateLocalFiles() {
	    //ContentManager.getContent() retrieves all of the content that is
	    // being shared by this peer.
            Content[] content = cms.getContentManager().getContent();
	    
	    //erase the list of shared content...
            fileList.removeAll();
	    
	    //...and repopulate it
            for (int i=0; i<content.length; i++) {
                fileList.add(content[i].getContentAdvertisement().getName());
            }
        }
    }

    /**
     * A window adapter to take care of cleanup
     */
    class WindowMonitor extends WindowAdapter {
        public void windowClosing(WindowEvent e) {
            Window w = e.getWindow();
            w.setVisible(false);
            w.dispose();
            System.exit(0);
        }
    }
}