diff -r f907866f0e4b -r 6fceb66e1ad7 org/sonews/web/SonewsChartServlet.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org/sonews/web/SonewsChartServlet.java	Fri Jun 26 16:48:50 2009 +0200
@@ -0,0 +1,114 @@
+/*
+ *   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.web;
+
+import info.monitorenter.gui.chart.ITrace2D;
+import info.monitorenter.gui.chart.traces.Trace2DSimple;
+import java.io.IOException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Servlet that creates chart images and returns them as raw PNG images.
+ * @author Christian Lins
+ * @since sonews/0.5.0
+ */
+public class SonewsChartServlet extends AbstractSonewsServlet
+{
+  
+  private ITrace2D createProcessMails24(String title, String cmd)
+    throws IOException
+  {
+    int[] data = read24Values(cmd);
+    ITrace2D trace = new Trace2DSimple(title);
+    trace.addPoint(0.0, 0.0); // Start
+    
+    for(int n = 0; n < 24; n++)
+    {
+      trace.addPoint(n, data[n]);
+    }
+
+    return trace;
+  }
+  
+  @Override
+  public void doGet(HttpServletRequest req, HttpServletResponse resp)
+    throws IOException
+  {
+    synchronized(this)
+    {
+      MemoryBitmapChart chart = new MemoryBitmapChart();
+
+      String name  = req.getParameter("name");
+      String group = req.getParameter("group");
+      ITrace2D trace;
+      String   cmd = "XDAEMON LOG";
+
+      if(name.equals("feedednewsyesterday"))
+      {
+        cmd = cmd + " TRANSMITTED_NEWS";
+        cmd = group != null ? cmd + " " + group : cmd;
+        trace = createProcessMails24(
+          "To peers transmitted mails yesterday", cmd);
+      }
+      else if(name.equals("gatewayednewsyesterday"))
+      {
+        cmd = cmd + " GATEWAYED_NEWS";
+        cmd = group != null ? cmd + " " + group : cmd;
+        trace = createProcessMails24(
+          "Gatewayed mails yesterday", cmd);
+      }
+      else
+      {
+        cmd = cmd + " POSTED_NEWS";
+        cmd = group != null ? cmd + " " + group : cmd;
+        trace = createProcessMails24(
+          "Posted mails yesterday", cmd);
+      }
+      chart.addTrace(trace);
+
+      resp.getOutputStream().write(chart.getRawData(500, 400));
+      resp.setContentType(chart.getContentType());
+      resp.setStatus(HttpServletResponse.SC_OK);
+    }
+  }
+  
+  private int[] read24Values(String command)
+    throws IOException
+  {
+    int[] values = new int[24];
+    connectToNewsserver();
+    printlnToNewsserver(command);
+    String line = readlnFromNewsserver();
+    if(!line.startsWith("200 "))
+      throw new IOException(command + " not supported!");
+    
+    for(int n = 0; n < 24; n++)
+    {
+      line = readlnFromNewsserver();
+      values[n] = Integer.parseInt(line.split(" ")[1]);
+    }
+    
+    line = readlnFromNewsserver(); // "."
+    
+    disconnectFromNewsserver();
+    return values;
+  }
+  
+}