boxtec
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yacy_search_server
mirror of https://github.com/yacy/yacy_search_server
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better network image cache

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git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7008 6c8d7289-2bf4-0310-a012-ef5d649a1542
pull/1/head
orbiter 15 years ago
parent e7ea3b3cc5
commit 66266a288e
1 changed files with 48 additions and 47 deletions
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95
htroot/NetworkPicture.java
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@ -24,8 +24,6 @@
// 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.TreeMap;
import de.anomic.http.server.RequestHeader;
import de.anomic.search.Switchboard;
import de.anomic.search.SwitchboardConstants;
@ -37,59 +35,62 @@ import de.anomic.yacy.graphics.NetworkGraph;
/** draw a picture of the yacy network */
public class NetworkPicture {
private static final TreeMap<Long, EncodedImage> buffer = new TreeMap<Long, EncodedImage>();
private static final Object sync = new Object();
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;
long timeSeconds = System.currentTimeMillis() / 1000;
EncodedImage bufferedImage = null;
synchronized (buffer) {
bufferedImage = buffer.get(timeSeconds);
}
if (bufferedImage != null) return bufferedImage;
int width = 768;
int height = 576;
int passiveLimit = 720; // 12 hours
int potentialLimit = 720;
int maxCount = 1000;
String bgcolor = NetworkGraph.COL_BACKGROUND;
boolean corona = true;
int coronaangle = 0;
long communicationTimeout = -1;
if (post != null) {
width = post.getInt("width", 768);
height = post.getInt("height", 576);
passiveLimit = post.getInt("pal", 1440);
potentialLimit = post.getInt("pol", 1440);
maxCount = post.getInt("max", 1000);
corona = post.get("corona", "true").equals("true");
coronaangle = (corona) ? post.getInt("coronaangle", 0) : -1;
communicationTimeout = post.getLong("ct", -1);
bgcolor = post.get("bgcolor", bgcolor);
}
//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 > 1920) height = 1920;
if (!authorized) {
width = Math.min(768, width);
height = Math.min(576, height);
if (buffer != null && timeSeconds - lastAccessSeconds < 2) {
//System.out.println("*** NetworkPicture: cache hit (1)");
return buffer;
}
if (passiveLimit > 1000000) passiveLimit = 1000000;
if (potentialLimit > 1000000) potentialLimit = 1000000;
if (maxCount > 10000) maxCount = 10000;
bufferedImage = 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");
synchronized (buffer) {
buffer.put(timeSeconds, bufferedImage);
while (buffer.size() > 8) buffer.remove(buffer.firstKey());
synchronized (sync) {
if (buffer != null && timeSeconds - lastAccessSeconds < 2) {
//System.out.println("*** NetworkPicture: cache hit (2)");
return buffer;
}
int width = 768;
int height = 576;
int passiveLimit = 720; // 12 hours
int potentialLimit = 720;
int maxCount = 1000;
String bgcolor = NetworkGraph.COL_BACKGROUND;
boolean corona = true;
int coronaangle = 0;
long communicationTimeout = -1;
if (post != null) {
width = post.getInt("width", 768);
height = post.getInt("height", 576);
passiveLimit = post.getInt("pal", 1440);
potentialLimit = post.getInt("pol", 1440);
maxCount = post.getInt("max", 1000);
corona = post.get("corona", "true").equals("true");
coronaangle = (corona) ? post.getInt("coronaangle", 0) : -1;
communicationTimeout = post.getLong("ct", -1);
bgcolor = post.get("bgcolor", bgcolor);
}
//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 > 1920) height = 1920;
if (!authorized) {
width = Math.min(768, 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).getImage(), "png");
lastAccessSeconds = System.currentTimeMillis() / 1000;
}
return bufferedImage;
return buffer;
}
}

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