--- android/TrainInfoService/src/dk/thoerup/traininfoservice/RequestPlotter.java	2010/06/07 11:29:55	801
+++ android/TrainInfoService/src/dk/thoerup/traininfoservice/RequestPlotter.java	2010/06/07 12:01:42	803
@@ -10,6 +10,7 @@
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Map;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.zip.ZipEntry;
@@ -20,6 +21,8 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import dk.thoerup.traininfoservice.banedk.TimeoutMap;
+
 public class RequestPlotter extends HttpServlet {
 	private static final long serialVersionUID = 1L;
 
@@ -27,6 +30,8 @@
 
 	static final String KML = "application/vnd.google-earth.kml";
 	static final String KMZ = "application/vnd.google-earth.kmz";
+	
+	Map<String,String> cache = new TimeoutMap<String,String>(2*60*1000);
 
 	class RequestPosition {
 		public String ip;
@@ -154,8 +159,19 @@
 
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+		final String KEY = "kmldata";
+		
+		String kmlData = cache.get(KEY);
+		
+		if (kmlData == null) {
+			kmlData = formatXml( getRequestsFromFile() );
+			cache.put(KEY, kmlData);
+			kmlData += "<!-- from source -->";			
+		} else {
+			kmlData += "<!-- cached -->";
+		}
 
-		String data = formatXml( getRequestsFromFile() );
+		
 
 		if (req.getParameter("zip") != null) {
 
@@ -163,7 +179,7 @@
 
 			ZipOutputStream zip = new ZipOutputStream(baos);
 			zip.putNextEntry( new ZipEntry("trains.kml") );
-			zip.write( data.getBytes() );
+			zip.write( kmlData.getBytes() );
 			zip.closeEntry();
 			zip.close();
 
@@ -175,7 +191,7 @@
 
 		} else {
 			resp.setContentType(KML);
-			resp.getWriter().print( data );
+			resp.getWriter().print( kmlData );
 		}
 	}
 }