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// 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
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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.cora.util.ConcurrentLog;
import net.yacy.peers.graphics.EncodedImage;
import net.yacy.peers.graphics.NetworkGraph;
import net.yacy.search.Switchboard;
import net.yacy.search.SwitchboardConstants;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
/** draw a picture of the yacy network */
public class NetworkPicture {
private static final ConcurrentLog log = new ConcurrentLog("NetworkPicture");
private static final Semaphore sync = new Semaphore(1, true);
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 (NetworkGraph.buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
if (log.isFine()) log.fine("cache hit (1); authorized = "
+ authorized
+ ", timeSeconds - lastAccessSeconds = "
+ (timeSeconds - lastAccessSeconds));
return NetworkGraph.buffer;
}
if ( NetworkGraph.buffer != null && sync.availablePermits() == 0 ) {
return NetworkGraph.buffer;
}
sync.acquireUninterruptibly();
if (NetworkGraph.buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
if (log.isFine()) log.fine("cache hit (2); authorized = "
+ authorized
+ ", timeSeconds - lastAccessSeconds = "
+ (timeSeconds - lastAccessSeconds));
sync.release();
return NetworkGraph.buffer;
}
int width = 1280; // 640x480 = VGA, 768x576 = SD/4:3, 1024x576 =SD/16:9 1280x720 = HD/16:9, 1920x1080 = FULL HD/16:9
int height = 720;
int passiveLimit = 1440; // minutes; 1440 = 1 day; 720 = 12 hours; 1440 = 24 hours, 10080 = 1 week;
int potentialLimit = 1440;
int maxCount = 9000;
String bgcolor = Long.toHexString(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") || post.containsKey("coronaangle");
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 > 1280 ) {
height = 1280;
}
if ( !authorized ) {
width = Math.min(1280, width);
height = Math.min(1280, height);
}
if ( passiveLimit > 1000000 ) {
passiveLimit = 1000000;
}
if ( potentialLimit > 1000000 ) {
potentialLimit = 1000000;
}
if ( maxCount > 10000 ) {
maxCount = 10000;
}
NetworkGraph.buffer =
new EncodedImage(NetworkGraph.getNetworkPicture(
sb.peers,
width,
height,
passiveLimit,
potentialLimit,
maxCount,
coronaangle,
communicationTimeout,
env.getConfig(SwitchboardConstants.NETWORK_NAME, "unspecified"),
env.getConfig("network.unit.description", "unspecified"),
Long.parseLong(bgcolor, 16),
cyc), "png", false);
lastAccessSeconds = System.currentTimeMillis() / 1000;
sync.release();
return NetworkGraph.buffer;
}
}
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