diff -r 9f0b95aafaa3 -r ed84c8bdd87b src/org/sonews/daemon/command/XDaemonCommand.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/sonews/daemon/command/XDaemonCommand.java	Sun Aug 29 17:28:58 2010 +0200
@@ -0,0 +1,270 @@
+/*
+ *   SONEWS News Server
+ *   see AUTHORS for the list of contributors
+ *
+ *   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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sonews.daemon.command;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.List;
+import org.sonews.config.Config;
+import org.sonews.daemon.NNTPConnection;
+import org.sonews.storage.StorageBackendException;
+import org.sonews.storage.StorageManager;
+import org.sonews.feed.FeedManager;
+import org.sonews.feed.Subscription;
+import org.sonews.storage.Channel;
+import org.sonews.storage.Group;
+import org.sonews.util.Stats;
+
+/**
+ * The XDAEMON command allows a client to get/set properties of the
+ * running server daemon. Only locally connected clients are allowed to
+ * use this command.
+ * The restriction to localhost connection can be suppressed by overriding
+ * the sonews.xdaemon.host bootstrap config property.
+ * @author Christian Lins
+ * @since sonews/0.5.0
+ */
+public class XDaemonCommand implements Command
+{
+
+  @Override
+  public String[] getSupportedCommandStrings()
+  {
+    return new String[]{"XDAEMON"};
+  }
+
+  @Override
+  public boolean hasFinished()
+  {
+    return true;
+  }
+
+  @Override
+  public String impliedCapability()
+  {
+    return null;
+  }
+
+  @Override
+  public boolean isStateful()
+  {
+    return false;
+  }
+
+  private void channelAdd(String[] commands, NNTPConnection conn)
+    throws IOException, StorageBackendException
+  {
+    String groupName = commands[2];
+    if(StorageManager.current().isGroupExisting(groupName))
+    {
+      conn.println("400 group " + groupName + " already existing!");
+    }
+    else
+    {
+      StorageManager.current().addGroup(groupName, Integer.parseInt(commands[3]));
+      conn.println("200 group " + groupName + " created");
+    }
+  }
+
+  // TODO: Refactor this method to reduce complexity!
+  @Override
+  public void processLine(NNTPConnection conn, String line, byte[] raw)
+    throws IOException, StorageBackendException
+  {
+    InetSocketAddress addr = (InetSocketAddress)conn.getSocketChannel().socket()
+      .getRemoteSocketAddress();
+    if(addr.getHostName().equals(
+      Config.inst().get(Config.XDAEMON_HOST, "localhost")))
+    {
+      String[] commands = line.split(" ", 4);
+      if(commands.length == 3 && commands[1].equalsIgnoreCase("LIST"))
+      {
+        if(commands[2].equalsIgnoreCase("CONFIGKEYS"))
+        {
+          conn.println("100 list of available config keys follows");
+          for(String key : Config.AVAILABLE_KEYS)
+          {
+            conn.println(key);
+          }
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("PEERINGRULES"))
+        {
+          List<Subscription> pull = 
+            StorageManager.current().getSubscriptions(FeedManager.TYPE_PULL);
+          List<Subscription> push =
+            StorageManager.current().getSubscriptions(FeedManager.TYPE_PUSH);
+          conn.println("100 list of peering rules follows");
+          for(Subscription sub : pull)
+          {
+            conn.println("PULL " + sub.getHost() + ":" + sub.getPort()
+              + " " + sub.getGroup());
+          }
+          for(Subscription sub : push)
+          {
+            conn.println("PUSH " + sub.getHost() + ":" + sub.getPort()
+              + " " + sub.getGroup());
+          }
+          conn.println(".");
+        }
+        else
+        {
+          conn.println("401 unknown sub command");
+        }
+      }
+      else if(commands.length == 3 && commands[1].equalsIgnoreCase("DELETE"))
+      {
+        StorageManager.current().delete(commands[2]);
+        conn.println("200 article " + commands[2] + " deleted");
+      }
+      else if(commands.length == 4 && commands[1].equalsIgnoreCase("GROUPADD"))
+      {
+        channelAdd(commands, conn);
+      }
+      else if(commands.length == 3 && commands[1].equalsIgnoreCase("GROUPDEL"))
+      {
+        Group group = StorageManager.current().getGroup(commands[2]);
+        if(group == null)
+        {
+          conn.println("400 group not found");
+        }
+        else
+        {
+          group.setFlag(Group.DELETED);
+          group.update();
+          conn.println("200 group " + commands[2] + " marked as deleted");
+        }
+      }
+      else if(commands.length == 4 && commands[1].equalsIgnoreCase("SET"))
+      {
+        String key = commands[2];
+        String val = commands[3];
+        Config.inst().set(key, val);
+        conn.println("200 new config value set");
+      }
+      else if(commands.length == 3 && commands[1].equalsIgnoreCase("GET"))
+      {
+        String key = commands[2];
+        String val = Config.inst().get(key, null);
+        if(val != null)
+        {
+          conn.println("100 config value for " + key + " follows");
+          conn.println(val);
+          conn.println(".");
+        }
+        else
+        {
+          conn.println("400 config value not set");
+        }
+      }
+      else if(commands.length >= 3 && commands[1].equalsIgnoreCase("LOG"))
+      {
+        Group group = null;
+        if(commands.length > 3)
+        {
+          group = (Group)Channel.getByName(commands[3]);
+        }
+
+        if(commands[2].equalsIgnoreCase("CONNECTED_CLIENTS"))
+        {
+          conn.println("100 number of connections follow");
+          conn.println(Integer.toString(Stats.getInstance().connectedClients()));
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("POSTED_NEWS"))
+        {
+          conn.println("100 hourly numbers of posted news yesterday");
+          for(int n = 0; n < 24; n++)
+          {
+            conn.println(n + " " + Stats.getInstance()
+              .getYesterdaysEvents(Stats.POSTED_NEWS, n, group));
+          }
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("GATEWAYED_NEWS"))
+        {
+          conn.println("100 hourly numbers of gatewayed news yesterday");
+          for(int n = 0; n < 24; n++)
+          {
+            conn.println(n + " " + Stats.getInstance()
+              .getYesterdaysEvents(Stats.GATEWAYED_NEWS, n, group));
+          }
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("TRANSMITTED_NEWS"))
+        {
+          conn.println("100 hourly numbers of news transmitted to peers yesterday");
+          for(int n = 0; n < 24; n++)
+          {
+            conn.println(n + " " + Stats.getInstance()
+              .getYesterdaysEvents(Stats.FEEDED_NEWS, n, group));
+          }
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("HOSTED_NEWS"))
+        {
+          conn.println("100 number of overall hosted news");
+          conn.println(Integer.toString(Stats.getInstance().getNumberOfNews()));
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("HOSTED_GROUPS"))
+        {
+          conn.println("100 number of hosted groups");
+          conn.println(Integer.toString(Stats.getInstance().getNumberOfGroups()));
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("POSTED_NEWS_PER_HOUR"))
+        {
+          conn.println("100 posted news per hour");
+          conn.println(Double.toString(Stats.getInstance().postedPerHour(-1)));
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("FEEDED_NEWS_PER_HOUR"))
+        {
+          conn.println("100 feeded news per hour");
+          conn.println(Double.toString(Stats.getInstance().feededPerHour(-1)));
+          conn.println(".");
+        }
+        else if(commands[2].equalsIgnoreCase("GATEWAYED_NEWS_PER_HOUR"))
+        {
+          conn.println("100 gatewayed news per hour");
+          conn.println(Double.toString(Stats.getInstance().gatewayedPerHour(-1)));
+          conn.println(".");
+        }
+        else
+        {
+          conn.println("401 unknown sub command");
+        }
+      }
+      else if(commands.length >= 3 && commands[1].equalsIgnoreCase("PLUGIN"))
+      {
+        
+      }
+      else
+      {
+        conn.println("400 invalid command usage");
+      }
+    }
+    else
+    {
+      conn.println("501 not allowed");
+    }
+  }
+  
+}