trtrackerservertorrentimpl.java

Azureus is a powerful, full-featured, cross-platform java BitTorrent client

								rep_peers.add( rep_peer );
							
							}
						}
					}
				}
			}
			
			Map	root = new TreeMap();	// user TreeMap to pre-sort so encoding quicker
			
			int	num_peers_returned	= rep_peers.size();
			
			if ( compact ){
				
				byte[]	compact_peers = new byte[rep_peers.size()*6];
							
				for ( int i=0;i<num_peers_returned;i++){
					
					Map	rep_peer = (Map)rep_peers.get(i);
					
					byte[] 	ip 		= (byte[])rep_peer.get( "ip" );
					int		port	= ((Long)rep_peer.get( "port" )).intValue();
					
					int	pos = i*6;
					
					System.arraycopy( ip, 0, compact_peers, pos, 4 );
					
					pos += 4;
					
					compact_peers[pos++] = (byte)(port>>8);
					compact_peers[pos++] = (byte)(port&0xff);
				}
									
				root.put( "peers", compact_peers );
			}else{
				
				root.put( "peers", rep_peers );
			}
			
			root.put( "interval", new Long( interval ));
		
			if ( nat_warning ){
				
				requesting_peer.setNATStatus( TRTrackerServerPeerImpl.NAT_CHECK_FAILED_AND_REPORTED );
				
				root.put( 
						"warning message", 
						("Unable to connect to your incoming data port (" + requesting_peer.getIP() + ":" + requesting_peer.getPort() +"). " +
						 "This will result in slow downloads. Please check your firewall/router settings").getBytes());
			}
			
				// also include scrape details
			
			root.put( "complete", new Long( getSeedCount() ));
			root.put( "incomplete", new Long( getLeecherCount() ));
			root.put( "downloaded", new Long(stats.getCompletedCount()));
			
			if ( add_to_cache ){
					
				announce_cache.put( new Integer((num_peers_returned+9)/10), new announceCacheEntry( root, send_peer_ids, compact ));
			}
			
			return( root );
			
		}finally{
			
			this_mon.exit();
		}
	}
		
	public Map
	exportScrapeToMap(
		boolean		allow_cache )
	{
		try{
			this_mon.enter();
		
			stats.addScrape();
			
			long	now = SystemTime.getCurrentTime();
			
			if ( 	allow_cache && !SystemTime.isErrorLast1min() &&
					last_scrape != null && 
					now - last_scrape_calc_time < TRTrackerServerImpl.getScrapeCachePeriod()){
				
				return( last_scrape );
			}
			
			last_scrape 			= new TreeMap();
			last_scrape_calc_time	= now;
			
			last_scrape.put( "complete", new Long( getSeedCount()));
			last_scrape.put( "incomplete", new Long( getLeecherCount()));
			last_scrape.put( "downloaded", new Long(stats.getCompletedCount()));
			
			return( last_scrape );
			
		}finally{
			
			this_mon.exit();
		}
	}
	
	protected void
	checkTimeouts()
	{
		try{
			this_mon.enter();
		
			long	now = SystemTime.getCurrentTime();
			
			int	new_bad_NAT_count	= 0;
			
			try{
				peer_list_compaction_suspended	= true;
				
				for (int i=0;i<peer_list.size();i++){
									
					TRTrackerServerPeerImpl	peer = (TRTrackerServerPeerImpl)peer_list.get(i);
					
					if ( peer == null ){
						
						continue;
					}
					
					if ( now > peer.getTimeout()){
						
						removePeer( peer, i );
						
					}else{
						
						if ( peer.isNATStatusBad()){
							
							new_bad_NAT_count++;
						}
					}
				}
			}finally{
				
				peer_list_compaction_suspended	= false;
			}
			
			bad_NAT_count	= new_bad_NAT_count;
			
			if ( removed_count > 1000 ){
				
				removed_count = 0;
				
				checkForPeerListCompaction( true );
				
					// rehash
				
				HashMap	new_peer_map 		= new HashMap(peer_map);
				HashMap	new_peer_reuse_map	= new HashMap(peer_reuse_map);
				
				peer_map 		= new_peer_map;
				peer_reuse_map	= new_peer_reuse_map;
				
			}else{
				
				checkForPeerListCompaction( false );
			}
			
			Iterator	it = lightweight_seed_map.values().iterator();
			
			while( it.hasNext()){
				
				lightweightSeed	lws = (lightweightSeed)it.next();
				
				if ( now > lws.getTimeout()){
				
					it.remove();
				}
			}
		}finally{
			
			this_mon.exit();
		}
	}
	
	protected void
	checkForPeerListCompaction(
		boolean	force )
	{
		if ( peer_list_hole_count > 0 && !peer_list_compaction_suspended ){
			
			if ( force || peer_list_hole_count > peer_map.size()/10 ){
								
				ArrayList	new_peer_list = new ArrayList( peer_list.size() - (peer_list_hole_count/2));
				
				int	holes_found = 0;
				
				for (int i=0;i<peer_list.size();i++){
					
					Object	obj = peer_list.get(i);
					
					if ( obj == null ){
						
						holes_found++;
					}else{
						
						new_peer_list.add( obj );
					}
				}
				
				if( holes_found != peer_list_hole_count ){
					
					Debug.out( "TRTrackerTorrent:compactHoles: count mismatch" );
				}
				
				peer_list	= new_peer_list;
				
				peer_list_hole_count	= 0;
			}
		}
	}
	
	protected void
	updateXferStats(
		int		bytes_in,
		int		bytes_out )
	{
		stats.addXferStats( bytes_in, bytes_out );
	}
	
	public TRTrackerServerTorrentStats
	getStats()
	{
		return( stats );
	}
	
	public int
	getPeerCount()
	{
		return( peer_map.size() + lightweight_seed_map.size());
	}
	
	public int
	getSeedCount()
	{
		if ( seed_count < 0 ){
			
			Debug.out( "seed count negative" );
		}
				
		return( seed_count + lightweight_seed_map.size());
	}
	
	public int
	getLeecherCount()
	{
			// this isn't synchronised so could possible end up negative
		
		int	res = peer_map.size() - seed_count;
		
		return( res<0?0:res );
	}
	
	public TRTrackerServerPeer[]
	getPeers()
	{
		try{
			this_mon.enter();
		
			TRTrackerServerPeer[]	res = new TRTrackerServerPeer[peer_map.size()];
		
			peer_map.values().toArray( res );
		
			return( res );
			
		}finally{
			
			this_mon.exit();
		}
	}
	
	public HashWrapper
	getHash()
	{
		return( hash );
	}
		
	public void
	addListener(
		TRTrackerServerTorrentListener	l )
	{
		listeners.add(l);
		
		if ( deleted ){
			
			l.deleted(this);
		}
	}
	
	public void
	removeListener(
		TRTrackerServerTorrentListener	l )
	{
		listeners.remove(l);
	}
	
	public void
	disableCaching()
	{
		caching_enabled	= false;
	}
	
	public boolean
	isCachingEnabled()
	{
		return( caching_enabled );
	}
	
	public int
	getBadNATPeerCount()
	{
		return( bad_NAT_count );
	}
	
	protected void
	delete()
	{
		deleted	= true;
		
		for (int i=0;i<listeners.size();i++){
			
			((TRTrackerServerTorrentListener)listeners.get(i)).deleted(this);
		}
	}
	
	static class
	announceCacheEntry
	{
		protected Map		data;
		protected boolean	send_peer_ids;
		protected boolean	compact;
		protected long		time;
		
		protected
		announceCacheEntry(
			Map		_data,
			boolean	_send_peer_ids,
			boolean	_compact )
		{
			data			= _data;
			send_peer_ids	= _send_peer_ids;
			compact			= _compact;
			time			= SystemTime.getCurrentTime();
		}
		
		protected boolean
		getSendPeerIds()
		{
			return( send_peer_ids );
		}
		
		protected boolean
		getCompact()
		{
			return( compact );
		}
		
		protected long
		getTime()
		{
			return( time );
		}
		
		protected Map
		getData()
		{
			return( data );
		}
	}
	
	protected static class
	lightweightSeed
	{
		long	timeout;
		long	last_contact_time;
		long	uploaded;
		byte	nat_status;
		
		protected
		lightweightSeed(
			long	_now,
			long	_timeout,
			long	_uploaded,
			byte	_nat_status )
		{
			last_contact_time	= _now;
			timeout				= _timeout;
			uploaded			= _uploaded;
			nat_status			= _nat_status;
		}
		
		protected long
		getTimeout()
		{
			return( timeout );
		}
		protected long
		getLastContactTime()
		{
			return( last_contact_time );
		}
		
		protected long
		getUploaded()
		{
			return( uploaded );
		}
		
		protected byte
		getNATStatus()
		{
			return( nat_status );
		}
	}
}