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107 lines
4.7 KiB
107 lines
4.7 KiB
// NetworkPicture.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// Created 08.10.2005
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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import java.util.concurrent.Semaphore;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.kelondro.logging.Log;
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import de.anomic.search.Switchboard;
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import de.anomic.search.SwitchboardConstants;
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import de.anomic.server.serverObjects;
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import de.anomic.server.serverSwitch;
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import de.anomic.yacy.graphics.EncodedImage;
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import de.anomic.yacy.graphics.NetworkGraph;
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/** draw a picture of the yacy network */
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public class NetworkPicture {
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private static final Semaphore sync = new Semaphore(1, true);
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private static EncodedImage buffer = null;
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private static long lastAccessSeconds = 0;
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public static EncodedImage respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
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final Switchboard sb = (Switchboard) env;
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final boolean authorized = sb.adminAuthenticated(header) >= 2;
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long timeSeconds = System.currentTimeMillis() / 1000;
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if (buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
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Log.logInfo("NetworkPicture", "cache hit (1); authorized = " + authorized + ", timeSeconds - lastAccessSeconds = " + (timeSeconds - lastAccessSeconds));
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return buffer;
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}
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if (buffer != null && sync.availablePermits() == 0) return buffer;
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sync.acquireUninterruptibly();
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if (buffer != null && !authorized && timeSeconds - lastAccessSeconds < 2) {
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Log.logInfo("NetworkPicture", "cache hit (2); authorized = " + authorized + ", timeSeconds - lastAccessSeconds = " + (timeSeconds - lastAccessSeconds));
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sync.release();
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return buffer;
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}
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int width = 1024; // 640x480 = VGA, 768x576 = SD/4:3, 1024x576 =SD/16:9 1280x720 = HD/16:9, 1920x1080 = FULL HD/16:9
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int height = 576;
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int passiveLimit = 1440; // minutes; 1440 = 1 day; 720 = 12 hours; 1440 = 24 hours, 10080 = 1 week;
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int potentialLimit = 1440;
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int maxCount = 1000;
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String bgcolor = NetworkGraph.COL_BACKGROUND;
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boolean corona = true;
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int coronaangle = 0;
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long communicationTimeout = -1;
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if (post != null) {
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width = post.getInt("width", width);
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height = post.getInt("height", height);
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passiveLimit = post.getInt("pal", passiveLimit);
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potentialLimit = post.getInt("pol", potentialLimit);
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maxCount = post.getInt("max", maxCount);
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corona = post.getBoolean("corona", true);
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coronaangle = (corona) ? post.getInt("coronaangle", 0) : -1;
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communicationTimeout = post.getLong("ct", -1);
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bgcolor = post.get("bgcolor", bgcolor);
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}
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//too small values lead to an error, too big to huge CPU/memory consumption, resulting in possible DOS.
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if (width < 320 ) width = 320;
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if (width > 1920) width = 1920;
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if (height < 240) height = 240;
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if (height > 1080) height = 1080;
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if (!authorized) {
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width = Math.min(1024, width);
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height = Math.min(576, height);
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}
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if (passiveLimit > 1000000) passiveLimit = 1000000;
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if (potentialLimit > 1000000) potentialLimit = 1000000;
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if (maxCount > 10000) maxCount = 10000;
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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).getImage(), "png");
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lastAccessSeconds = System.currentTimeMillis() / 1000;
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sync.release();
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return buffer;
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}
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}
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