1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/org/sonews/daemon/ConnectionWorker.java	Wed Aug 12 16:43:30 2009 +0200
     1.3 @@ -0,0 +1,102 @@
     1.4 +/*
     1.5 + *   SONEWS News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package org.sonews.daemon;
    1.23 +
    1.24 +import org.sonews.util.Log;
    1.25 +import java.nio.ByteBuffer;
    1.26 +import java.nio.channels.SocketChannel;
    1.27 +import java.util.concurrent.ArrayBlockingQueue;
    1.28 +
    1.29 +/**
    1.30 + * Does most of the work: parsing input, talking to client and Database.
    1.31 + * @author Christian Lins
    1.32 + * @since sonews/0.5.0
    1.33 + */
    1.34 +class ConnectionWorker extends AbstractDaemon
    1.35 +{
    1.36 +
    1.37 +  // 256 pending events should be enough
    1.38 +  private static ArrayBlockingQueue<SocketChannel> pendingChannels
    1.39 +    = new ArrayBlockingQueue<SocketChannel>(256, true);
    1.40 +  
    1.41 +  /**
    1.42 +   * Registers the given channel for further event processing.
    1.43 +   * @param channel
    1.44 +   */
    1.45 +  public static void addChannel(SocketChannel channel)
    1.46 +    throws InterruptedException
    1.47 +  {
    1.48 +    pendingChannels.put(channel);
    1.49 +  }
    1.50 +  
    1.51 +  /**
    1.52 +   * Processing loop.
    1.53 +   */
    1.54 +  @Override
    1.55 +  public void run()
    1.56 +  {
    1.57 +    while(isRunning())
    1.58 +    {
    1.59 +      try
    1.60 +      {
    1.61 +        // Retrieve and remove if available, otherwise wait.
    1.62 +        SocketChannel channel = pendingChannels.take();
    1.63 +
    1.64 +        if(channel != null)
    1.65 +        {
    1.66 +          // Connections.getInstance().get() MAY return null
    1.67 +          NNTPConnection conn = Connections.getInstance().get(channel);
    1.68 +          
    1.69 +          // Try to lock the connection object
    1.70 +          if(conn != null && conn.tryReadLock())
    1.71 +          {
    1.72 +            ByteBuffer buf = conn.getBuffers().nextInputLine();
    1.73 +            while(buf != null) // Complete line was received
    1.74 +            {
    1.75 +              final byte[] line = new byte[buf.limit()];
    1.76 +              buf.get(line);
    1.77 +              ChannelLineBuffers.recycleBuffer(buf);
    1.78 +              
    1.79 +              // Here is the actual work done
    1.80 +              conn.lineReceived(line);
    1.81 +
    1.82 +              // Read next line as we could have already received the next line
    1.83 +              buf = conn.getBuffers().nextInputLine();
    1.84 +            }
    1.85 +            conn.unlockReadLock();
    1.86 +          }
    1.87 +          else
    1.88 +          {
    1.89 +            addChannel(channel);
    1.90 +          }
    1.91 +        }
    1.92 +      }
    1.93 +      catch(InterruptedException ex)
    1.94 +      {
    1.95 +        Log.msg("ConnectionWorker interrupted: " + ex, true);
    1.96 +      }
    1.97 +      catch(Exception ex)
    1.98 +      {
    1.99 +        Log.msg("Exception in ConnectionWorker: " + ex, false);
   1.100 +        ex.printStackTrace();
   1.101 +      }
   1.102 +    } // end while(isRunning())
   1.103 +  }
   1.104 +  
   1.105 +}