author | František Kučera <franta-hg@frantovo.cz> |
Thu Oct 20 10:50:58 2011 +0200 (2011-10-20) | |
changeset 103 | a788bf0e1080 |
parent 35 | ed84c8bdd87b |
permissions | -rwxr-xr-x |
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/* |
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* SONEWS News Server |
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* see AUTHORS for the list of contributors |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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|
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package org.sonews.daemon; |
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|
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import org.sonews.config.Config; |
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import org.sonews.util.Log; |
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import org.sonews.util.Stats; |
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import java.io.IOException; |
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import java.net.InetSocketAddress; |
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import java.net.Socket; |
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import java.nio.channels.SocketChannel; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.ListIterator; |
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import java.util.Map; |
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|
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/** |
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* Daemon thread collecting all NNTPConnection instances. The thread |
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* checks periodically if there are stale/timed out connections and |
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* removes and purges them properly. |
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* @author Christian Lins |
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* @since sonews/0.5.0 |
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*/ |
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public final class Connections extends AbstractDaemon |
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{ |
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|
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private static final Connections instance = new Connections(); |
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|
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/** |
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* @return Active Connections instance. |
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*/ |
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public static Connections getInstance() |
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{ |
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return Connections.instance; |
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} |
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private final List<NNTPConnection> connections = new ArrayList<NNTPConnection>(); |
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private final Map<SocketChannel, NNTPConnection> connByChannel = new HashMap<SocketChannel, NNTPConnection>(); |
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|
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private Connections() |
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{ |
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setName("Connections"); |
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} |
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|
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/** |
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* Adds the given NNTPConnection to the Connections management. |
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* @param conn |
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* @see org.sonews.daemon.NNTPConnection |
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*/ |
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public void add(final NNTPConnection conn) |
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{ |
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synchronized (this.connections) { |
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this.connections.add(conn); |
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this.connByChannel.put(conn.getSocketChannel(), conn); |
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} |
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} |
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|
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/** |
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* @param channel |
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* @return NNTPConnection instance that is associated with the given |
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* SocketChannel. |
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*/ |
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public NNTPConnection get(final SocketChannel channel) |
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{ |
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synchronized (this.connections) { |
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return this.connByChannel.get(channel); |
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} |
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} |
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|
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int getConnectionCount(String remote) |
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{ |
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int cnt = 0; |
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synchronized (this.connections) { |
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for (NNTPConnection conn : this.connections) { |
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assert conn != null; |
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assert conn.getSocketChannel() != null; |
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|
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Socket socket = conn.getSocketChannel().socket(); |
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if (socket != null) { |
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InetSocketAddress sockAddr = (InetSocketAddress) socket.getRemoteSocketAddress(); |
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if (sockAddr != null) { |
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if (sockAddr.getHostName().equals(remote)) { |
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cnt++; |
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} |
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} |
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} // if(socket != null) |
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} |
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} |
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return cnt; |
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} |
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|
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/** |
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* Run loops. Checks periodically for timed out connections and purged them |
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* from the lists. |
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*/ |
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@Override |
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public void run() |
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{ |
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while (isRunning()) { |
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int timeoutMillis = 1000 * Config.inst().get(Config.TIMEOUT, 180); |
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|
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synchronized (this.connections) { |
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final ListIterator<NNTPConnection> iter = this.connections.listIterator(); |
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NNTPConnection conn; |
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|
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while (iter.hasNext()) { |
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conn = iter.next(); |
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if ((System.currentTimeMillis() - conn.getLastActivity()) > timeoutMillis |
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&& conn.getBuffers().isOutputBufferEmpty()) { |
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// A connection timeout has occurred so purge the connection |
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iter.remove(); |
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|
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// Close and remove the channel |
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SocketChannel channel = conn.getSocketChannel(); |
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connByChannel.remove(channel); |
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|
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try { |
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assert channel != null; |
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assert channel.socket() != null; |
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|
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// Close the channel; implicitely cancels all selectionkeys |
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channel.close(); |
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Log.get().info("Disconnected: " + channel.socket().getRemoteSocketAddress() |
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+ " (timeout)"); |
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} catch (IOException ex) { |
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Log.get().warning("Connections.run(): " + ex); |
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} |
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|
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// Recycle the used buffers |
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conn.getBuffers().recycleBuffers(); |
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|
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Stats.getInstance().clientDisconnect(); |
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} |
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} |
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} |
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|
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try { |
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Thread.sleep(10000); // Sleep ten seconds |
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} catch (InterruptedException ex) { |
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Log.get().warning("Connections Thread was interrupted: " + ex.getMessage()); |
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} |
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} |
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} |
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} |