peerstableextensions.java

这是一个基于java编写的torrent的P2P源码

/*
 * File    : PeersTableExtensions.java
 * Created : 29 nov. 2003
 * By      : Olivier
 *
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
package org.gudy.azureus2.pluginsimpl.local.ui.tables.peers;

import java.util.HashMap;
import java.util.Map;

import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.plugins.ui.tables.peers.PluginPeerItemFactory;

/**
 * @author Olivier
 *
 */
public class PeersTableExtensions {

  private static PeersTableExtensions 	instance;
  private static AEMonitor				class_mon	= new AEMonitor( "PeerTableExtensions:class" );

  private Map 			items;
  private AEMonitor		items_mon	= new AEMonitor( "PeerTableExtensions:items" );

  private PeersTableExtensions() {
   items = new HashMap();
  }
  
  public static PeersTableExtensions getInstance() {
  	try{
  		class_mon.enter();
  	
  		if(instance == null)
  			instance = new PeersTableExtensions();
  		return instance;
  		
  	}finally{
  		
  		class_mon.exit();
  	}
  }
  
  public void addExtension(String name,PluginPeerItemFactory item) {
    try{
    	items_mon.enter();
    
    	items.put(name,item);
      
    }finally{
    	
    	items_mon.exit();
    }
  }
  
  public Map getExtensions() {
    try{
    	items_mon.enter();
    
    	return new HashMap(items);
    }finally{
    	
    	items_mon.exit();
    }
  }

}