// NetworkPicture.java
// -----------------------
// part of YaCy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2005
// Created 08.10.2005
//
// $LastChangedDate: 2011-06-06 00:48:21 +0200 (Mo, 06. Jun 2011) $
// $LastChangedRevision: 7775 $
// $LastChangedBy: orbiter $
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import java.util.concurrent.Semaphore;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.logging.Log;
import de.anomic.search.Switchboard;
import de.anomic.search.SwitchboardConstants;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.graphics.EncodedImage;
import de.anomic.yacy.graphics.NetworkGraph;
/** draw a picture of the yacy network */
public class NetworkPicture {
private static final Semaphore sync = new Semaphore(1, true);
private static EncodedImage buffer = null;
private static long lastAccessSeconds = 0;
public static EncodedImage respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final Switchboard sb = (Switchboard) env;
final boolean authorized = sb.adminAuthenticated(header) >= 2;
final long timeSeconds = System.currentTimeMillis() / 1000;
if (buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
Log.logInfo("NetworkPicture", "cache hit (1); authorized = " + authorized + ", timeSeconds - lastAccessSeconds = " + (timeSeconds - lastAccessSeconds));
return buffer;
}
if (buffer != null && sync.availablePermits() == 0) return buffer;
sync.acquireUninterruptibly();
if (buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
Log.logInfo("NetworkPicture", "cache hit (2); authorized = " + authorized + ", timeSeconds - lastAccessSeconds = " + (timeSeconds - lastAccessSeconds));
sync.release();
return buffer;
}
int width = 1024; // 640x480 = VGA, 768x576 = SD/4:3, 1024x576 =SD/16:9 1280x720 = HD/16:9, 1920x1080 = FULL HD/16:9
int height = 576;
int passiveLimit = 1440; // minutes; 1440 = 1 day; 720 = 12 hours; 1440 = 24 hours, 10080 = 1 week;
int potentialLimit = 1440;
int maxCount = 1000;
String bgcolor = NetworkGraph.COL_BACKGROUND;
boolean corona = true;
int coronaangle = 0;
long communicationTimeout = -1;
int cyc = 0;
if (post != null) {
width = post.getInt("width", width);
height = post.getInt("height", height);
passiveLimit = post.getInt("pal", passiveLimit);
potentialLimit = post.getInt("pol", potentialLimit);
maxCount = post.getInt("max", maxCount);
corona = post.getBoolean("corona", true);
coronaangle = (corona) ? post.getInt("coronaangle", 0) : -1;
communicationTimeout = post.getLong("ct", -1);
bgcolor = post.get("bgcolor", bgcolor);
cyc = post.getInt("cyc", 0);
}
//too small values lead to an error, too big to huge CPU/memory consumption, resulting in possible DOS.
if (width < 320 ) width = 320;
if (width > 1920) width = 1920;
if (height < 240) height = 240;
if (height > 1080) height = 1080;
if (!authorized) {
width = Math.min(1024, width);
height = Math.min(576, height);
}
if (passiveLimit > 1000000) passiveLimit = 1000000;
if (potentialLimit > 1000000) potentialLimit = 1000000;
if (maxCount > 10000) maxCount = 10000;
buffer = new EncodedImage(NetworkGraph.getNetworkPicture(sb.peers, 10000, width, height, passiveLimit, potentialLimit, maxCount, coronaangle, communicationTimeout, env.getConfig(SwitchboardConstants.NETWORK_NAME, "unspecified"), env.getConfig("network.unit.description", "unspecified"), bgcolor, cyc).getImage(), "png");
lastAccessSeconds = System.currentTimeMillis() / 1000;
sync.release();
return buffer;
}
}