added new terminal servlet using current visualization methods and a new one: a processing (processing.org) applet.

the new servlet can be found at
http://localhost:8080/terminal_p.html
..to be enhanced..

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4773 6c8d7289-2bf4-0310-a012-ef5d649a1542

6 files changed, 787 insertions, 0 deletions

diff --git a/htroot/processing/domaingraph/applet/domaingraph.jar b/htroot/processing/domaingraph/applet/domaingraph.jar
new file mode 100755
index 000000000..9cb521ca7
--- /dev/null
+++ b/htroot/processing/domaingraph/applet/domaingraph.jar
diff --git a/htroot/processing/domaingraph/applet/domaingraph.java b/htroot/processing/domaingraph/applet/domaingraph.java
new file mode 100755
index 000000000..98f521cf2
--- /dev/null
+++ b/htroot/processing/domaingraph/applet/domaingraph.java
@@ -0,0 +1,229 @@
+import processing.core.*; import traer.physics.*; import traer.animation.*; import processing.net.*; import java.applet.*; import java.awt.*; import java.awt.image.*; import java.awt.event.*; import java.io.*; import java.net.*; import java.text.*; import java.util.*; import java.util.zip.*; import javax.sound.midi.*; import javax.sound.midi.spi.*; import javax.sound.sampled.*; import javax.sound.sampled.spi.*; import java.util.regex.*; import javax.xml.parsers.*; import javax.xml.transform.*; import javax.xml.transform.dom.*; import javax.xml.transform.sax.*; import javax.xml.transform.stream.*; import org.xml.sax.*; import org.xml.sax.ext.*; import org.xml.sax.helpers.*; public class domaingraph extends PApplet {// Domain visualization graph for YaCy
+// by Michael Christen
+//
+// this applet uses code and the physics engine from
+// http://www.cs.princeton.edu/~traer/physics/
+// from Jeffrey Traer Bernstein
+// redistribution is granted according to forum posting in
+// http://processing.org/discourse/yabb_beta/YaBB.cgi?board=os_libraries_tools;action=display;num=1139193613
+
+
+
+
+
+final float NODE_SIZE       = 6;
+final float EDGE_LENGTH     = 50;
+final float EDGE_STRENGTH   = 0.01f;
+final float SPACER_STRENGTH = 10;
+
+ParticleSystem physics;
+Smoother3D centroid;
+PFont font;
+Client myClient; 
+Particle center0, center1; // two gravity centers to support object ordering for non-quadratic fields
+String parsingHostName = "";
+String parsingHostID = "";
+HashMap nodes = new HashMap(); // map that holds host objects
+
+public void setup() {
+  
+  String[] fontList = PFont.list();
+  //println(fontList);
+  font = createFont(fontList[0], 32); //just take any, should be mostly Arial
+  textFont(font, 12); 
+  
+  size(660, 400);
+  smooth();
+  frameRate( 24 );
+  strokeWeight( 2 );
+  ellipseMode( CENTER );       
+  
+  physics = new ParticleSystem( 0, 0.25f );
+  centroid = new Smoother3D( 0.8f );
+
+  initializePhysics();
+  initRequest();
+}
+
+public void initRequest() {
+  myClient = new Client(this, "localhost", 8080);
+  myClient.write("GET /xml/webstructure.xml HTTP/1.1\n");
+  myClient.write("Host: localhost\n\n");
+}
+
+public void processRequestResponse() {
+  if (myClient.available() > 0) {
+    String line = myClient.readStringUntil((byte) 10);
+    //println("Line: " + line);
+    if (line == null) line = ""; else line = line.trim();
+    if (line.startsWith("<domain")) processDomain(parseProps(line.substring(7, line.length() - 1).trim()));
+    if (line.startsWith("<citation")) processCitation(parseProps(line.substring(9, line.length() - 2).trim()));
+  }
+}
+
+public HashMap parseProps(String s) {
+  String[] l = s.split(" ");
+  HashMap map = new HashMap();
+  int p;
+  String z;
+  for (int i = 0; i < l.length; i++) {
+    p = l[i].indexOf("=");
+    if (p > 0) {
+      z = l[i].substring(p + 1).trim();
+      if (z.charAt(0) == '"') z = z.substring(1);
+      if (z.charAt(z.length() - 1) == '"') z = z.substring(0, z.length() - 1);
+      map.put(l[i].substring(0, p), z);
+    }
+  }
+  return map;
+}
+
+public void processDomain(HashMap props) {
+  //println("Domain: " + props.toString());
+  parsingHostName = (String) props.get("host"); if (parsingHostName == null) parsingHostName = "";
+  parsingHostID = (String) props.get("id"); if (parsingHostID == null) parsingHostID = "";
+  host h = new host(parsingHostName, physics.makeParticle(1.0f, random(0, EDGE_LENGTH * 30), random(- EDGE_LENGTH * 2, EDGE_LENGTH * 2), 0));
+  nodes.put(parsingHostID, h);
+  addAttraction(h.node);
+}
+
+public void processCitation(HashMap props) {
+  //println("Citation: " + props.toString());
+  String host = (String) props.get("host"); if (host == null) host = "";
+  String id = (String) props.get("id"); if (id == null) id = "";
+  int count = 0;
+  try {
+  String counts = (String) props.get("count"); if (counts != null) count = Integer.parseInt(counts);
+  } catch (NumberFormatException e) {}
+  // find the two nodes that have a relation
+  host h = (host) nodes.get(id);
+  if (h == null) return; // host is not known TODO: store these and create relation later
+  host p = (host) nodes.get(parsingHostID); // this should be successful
+  addRelation(h.node, p.node);
+}
+
+public void draw() {
+  processRequestResponse();
+  
+  physics.tick( 1.0f ); 
+  if (physics.numberOfParticles() > 1) updateCentroid();
+  centroid.tick();
+
+  background( 0 );
+  translate( width/2 , height/2 );
+  scale( centroid.z() );
+  translate( -centroid.x(), -centroid.y() );
+ 
+  drawNetwork();
+}
+
+public void drawNetwork() {      
+  fill( 100, 255, 100 );
+  
+  // draw vertices
+  noStroke();
+  String name;
+  Iterator j = nodes.values().iterator();
+  host h;
+  while (j.hasNext()) {
+    h = (host) j.next();
+    Particle v = h.node;
+    ellipse(v.position().x(), v.position().y(), NODE_SIZE, NODE_SIZE);
+    name = h.name;
+    text(name, v.position().x() - (name.length() * 26 / 10), v.position().y() + 14);
+  }
+  
+  // draw center
+  /*
+  ellipse( center0.position().x(), center0.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center0";
+  text(name, center0.position().x() - (name.length() * 26 / 10), center0.position().y() + 14);
+  ellipse( center1.position().x(), center1.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center1";
+  text(name, center1.position().x() - (name.length() * 26 / 10), center1.position().y() + 14);
+  */
+  
+  // draw edges 
+  stroke( 160 );
+  beginShape( LINES );
+  for ( int i = 0; i < physics.numberOfSprings(); ++i ) {
+    Spring e = physics.getSpring( i );
+    Particle a = e.getOneEnd();
+    Particle b = e.getTheOtherEnd();
+    vertex( a.position().x(), a.position().y() );
+    vertex( b.position().x(), b.position().y() );
+  }
+  endShape();
+}
+
+public void keyPressed() {
+  if ( key == 'c' ) {
+    initializePhysics();
+    return;
+  }
+  
+  if ( key == ' ' ) {
+    Particle p = physics.makeParticle();
+    addRelation(p, physics.getParticle( (int) random( 0, physics.numberOfParticles()-1) ));
+    addAttraction(p);
+    return;
+  }
+}
+
+public void updateCentroid() {
+  float 
+    xMax = Float.NEGATIVE_INFINITY, 
+    xMin = Float.POSITIVE_INFINITY, 
+    yMin = Float.POSITIVE_INFINITY, 
+    yMax = Float.NEGATIVE_INFINITY;
+
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle p = physics.getParticle( i );
+    xMax = max( xMax, p.position().x() );
+    xMin = min( xMin, p.position().x() );
+    yMin = min( yMin, p.position().y() );
+    yMax = max( yMax, p.position().y() );
+  }
+  float deltaX = xMax-xMin;
+  float deltaY = yMax-yMin;
+  if ( deltaY > deltaX )
+    centroid.setTarget( xMin + 0.5f*deltaX, yMin +0.5f*deltaY, height/(deltaY+50) );
+  else
+    centroid.setTarget( xMin + 0.5f*deltaX, yMin +0.5f*deltaY, width/(deltaX+50) );
+}
+
+public void initializePhysics() {
+  physics.clear();
+  center0 = physics.makeParticle(1.0f, 0, 0, 0);
+  center0.makeFixed();
+  center1 = physics.makeParticle(1.0f, EDGE_LENGTH * 30, 0, 0);
+  center1.makeFixed();
+  centroid.setValue( 0, 0, 1.0f );
+}
+
+public void addAttraction(Particle p) {
+  physics.makeAttraction(center0, p, 5000.0f, 3 * EDGE_LENGTH);
+  physics.makeAttraction(center1, p, 5000.0f, 3 * EDGE_LENGTH);
+
+  // spacers
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle q = physics.getParticle( i );
+    if (p != q) physics.makeAttraction( p, q, -SPACER_STRENGTH, 20);
+  }
+}
+
+public void addRelation(Particle p, Particle other) {
+  physics.makeSpring( p, other, EDGE_STRENGTH, EDGE_STRENGTH, EDGE_LENGTH );
+  //p.moveTo( q.position().x() + random( -1, 1 ), q.position().y() + random( -1, 1 ), 0 );
+}
+
+static class host {
+  String name;
+  Particle node;
+  public host(String name, Particle node) {
+    this.name = name;
+    this.node = node;
+  }
+}
+
+  static public void main(String args[]) {     PApplet.main(new String[] { "domaingraph" });  }}
\ No newline at end of file
diff --git a/htroot/processing/domaingraph/applet/domaingraph.pde b/htroot/processing/domaingraph/applet/domaingraph.pde
new file mode 100755
index 000000000..e79f083e7
--- /dev/null
+++ b/htroot/processing/domaingraph/applet/domaingraph.pde
@@ -0,0 +1,227 @@
+// Domain visualization graph for YaCy
+// by Michael Christen
+//
+// this applet uses code and the physics engine from
+// http://www.cs.princeton.edu/~traer/physics/
+// from Jeffrey Traer Bernstein
+// redistribution is granted according to forum posting in
+// http://processing.org/discourse/yabb_beta/YaBB.cgi?board=os_libraries_tools;action=display;num=1139193613
+
+import traer.physics.*;
+import traer.animation.*;
+import processing.net.*;
+
+final float NODE_SIZE       = 6;
+final float EDGE_LENGTH     = 50;
+final float EDGE_STRENGTH   = 0.01;
+final float SPACER_STRENGTH = 10;
+
+ParticleSystem physics;
+Smoother3D centroid;
+PFont font;
+Client myClient; 
+Particle center0, center1; // two gravity centers to support object ordering for non-quadratic fields
+String parsingHostName = "";
+String parsingHostID = "";
+HashMap nodes = new HashMap(); // map that holds host objects
+
+void setup() {
+  
+  String[] fontList = PFont.list();
+  //println(fontList);
+  font = createFont(fontList[0], 32); //just take any, should be mostly Arial
+  textFont(font, 12); 
+  
+  size(660, 400);
+  smooth();
+  frameRate( 24 );
+  strokeWeight( 2 );
+  ellipseMode( CENTER );       
+  
+  physics = new ParticleSystem( 0, 0.25 );
+  centroid = new Smoother3D( 0.8 );
+
+  initializePhysics();
+  initRequest();
+}
+
+void initRequest() {
+  myClient = new Client(this, "localhost", 8080);
+  myClient.write("GET /xml/webstructure.xml HTTP/1.1\n");
+  myClient.write("Host: localhost\n\n");
+}
+
+void processRequestResponse() {
+  if (myClient.available() > 0) {
+    String line = myClient.readStringUntil((byte) 10);
+    //println("Line: " + line);
+    if (line == null) line = ""; else line = line.trim();
+    if (line.startsWith("<domain")) processDomain(parseProps(line.substring(7, line.length() - 1).trim()));
+    if (line.startsWith("<citation")) processCitation(parseProps(line.substring(9, line.length() - 2).trim()));
+  }
+}
+
+HashMap parseProps(String s) {
+  String[] l = s.split(" ");
+  HashMap map = new HashMap();
+  int p;
+  String z;
+  for (int i = 0; i < l.length; i++) {
+    p = l[i].indexOf("=");
+    if (p > 0) {
+      z = l[i].substring(p + 1).trim();
+      if (z.charAt(0) == '"') z = z.substring(1);
+      if (z.charAt(z.length() - 1) == '"') z = z.substring(0, z.length() - 1);
+      map.put(l[i].substring(0, p), z);
+    }
+  }
+  return map;
+}
+
+void processDomain(HashMap props) {
+  //println("Domain: " + props.toString());
+  parsingHostName = (String) props.get("host"); if (parsingHostName == null) parsingHostName = "";
+  parsingHostID = (String) props.get("id"); if (parsingHostID == null) parsingHostID = "";
+  host h = new host(parsingHostName, physics.makeParticle(1.0, random(0, EDGE_LENGTH * 30), random(- EDGE_LENGTH * 2, EDGE_LENGTH * 2), 0));
+  nodes.put(parsingHostID, h);
+  addAttraction(h.node);
+}
+
+void processCitation(HashMap props) {
+  //println("Citation: " + props.toString());
+  String host = (String) props.get("host"); if (host == null) host = "";
+  String id = (String) props.get("id"); if (id == null) id = "";
+  int count = 0;
+  try {
+  String counts = (String) props.get("count"); if (counts != null) count = Integer.parseInt(counts);
+  } catch (NumberFormatException e) {}
+  // find the two nodes that have a relation
+  host h = (host) nodes.get(id);
+  if (h == null) return; // host is not known TODO: store these and create relation later
+  host p = (host) nodes.get(parsingHostID); // this should be successful
+  addRelation(h.node, p.node);
+}
+
+void draw() {
+  processRequestResponse();
+  
+  physics.tick( 1.0 ); 
+  if (physics.numberOfParticles() > 1) updateCentroid();
+  centroid.tick();
+
+  background( 0 );
+  translate( width/2 , height/2 );
+  scale( centroid.z() );
+  translate( -centroid.x(), -centroid.y() );
+ 
+  drawNetwork();
+}
+
+void drawNetwork() {      
+  fill( 100, 255, 100 );
+  
+  // draw vertices
+  noStroke();
+  String name;
+  Iterator j = nodes.values().iterator();
+  host h;
+  while (j.hasNext()) {
+    h = (host) j.next();
+    Particle v = h.node;
+    ellipse(v.position().x(), v.position().y(), NODE_SIZE, NODE_SIZE);
+    name = h.name;
+    text(name, v.position().x() - (name.length() * 26 / 10), v.position().y() + 14);
+  }
+  
+  // draw center
+  /*
+  ellipse( center0.position().x(), center0.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center0";
+  text(name, center0.position().x() - (name.length() * 26 / 10), center0.position().y() + 14);
+  ellipse( center1.position().x(), center1.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center1";
+  text(name, center1.position().x() - (name.length() * 26 / 10), center1.position().y() + 14);
+  */
+  
+  // draw edges 
+  stroke( 160 );
+  beginShape( LINES );
+  for ( int i = 0; i < physics.numberOfSprings(); ++i ) {
+    Spring e = physics.getSpring( i );
+    Particle a = e.getOneEnd();
+    Particle b = e.getTheOtherEnd();
+    vertex( a.position().x(), a.position().y() );
+    vertex( b.position().x(), b.position().y() );
+  }
+  endShape();
+}
+
+void keyPressed() {
+  if ( key == 'c' ) {
+    initializePhysics();
+    return;
+  }
+  
+  if ( key == ' ' ) {
+    Particle p = physics.makeParticle();
+    addRelation(p, physics.getParticle( (int) random( 0, physics.numberOfParticles()-1) ));
+    addAttraction(p);
+    return;
+  }
+}
+
+void updateCentroid() {
+  float 
+    xMax = Float.NEGATIVE_INFINITY, 
+    xMin = Float.POSITIVE_INFINITY, 
+    yMin = Float.POSITIVE_INFINITY, 
+    yMax = Float.NEGATIVE_INFINITY;
+
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle p = physics.getParticle( i );
+    xMax = max( xMax, p.position().x() );
+    xMin = min( xMin, p.position().x() );
+    yMin = min( yMin, p.position().y() );
+    yMax = max( yMax, p.position().y() );
+  }
+  float deltaX = xMax-xMin;
+  float deltaY = yMax-yMin;
+  if ( deltaY > deltaX )
+    centroid.setTarget( xMin + 0.5*deltaX, yMin +0.5*deltaY, height/(deltaY+50) );
+  else
+    centroid.setTarget( xMin + 0.5*deltaX, yMin +0.5*deltaY, width/(deltaX+50) );
+}
+
+void initializePhysics() {
+  physics.clear();
+  center0 = physics.makeParticle(1.0, 0, 0, 0);
+  center0.makeFixed();
+  center1 = physics.makeParticle(1.0, EDGE_LENGTH * 30, 0, 0);
+  center1.makeFixed();
+  centroid.setValue( 0, 0, 1.0 );
+}
+
+void addAttraction(Particle p) {
+  physics.makeAttraction(center0, p, 5000.0, 3 * EDGE_LENGTH);
+  physics.makeAttraction(center1, p, 5000.0, 3 * EDGE_LENGTH);
+
+  // spacers
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle q = physics.getParticle( i );
+    if (p != q) physics.makeAttraction( p, q, -SPACER_STRENGTH, 20);
+  }
+}
+
+void addRelation(Particle p, Particle other) {
+  physics.makeSpring( p, other, EDGE_STRENGTH, EDGE_STRENGTH, EDGE_LENGTH );
+  //p.moveTo( q.position().x() + random( -1, 1 ), q.position().y() + random( -1, 1 ), 0 );
+}
+
+static class host {
+  String name;
+  Particle node;
+  public host(String name, Particle node) {
+    this.name = name;
+    this.node = node;
+  }
+}
diff --git a/htroot/processing/domaingraph/applet/index.html b/htroot/processing/domaingraph/applet/index.html
new file mode 100755
index 000000000..6aac5de48
--- /dev/null
+++ b/htroot/processing/domaingraph/applet/index.html
@@ -0,0 +1,104 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+	<head>
+	        <!-- charset must remain utf-8 to be handled properly by Processing -->
+		<meta http-equiv="content-type" content="text/html; charset=utf-8" />
+		
+		<title>domaingraph : Built with Processing</title>
+		
+		<style type="text/css">
+		/* <![CDATA[ */
+	
+		body {
+  		  margin: 60px 0px 0px 55px;
+		  font-family: verdana, geneva, arial, helvetica, sans-serif; 
+		  font-size: 11px; 
+		  background-color: #ddddcc; 
+		  text-decoration: none; 
+		  font-weight: normal; 
+		  line-height: normal; 
+		}
+		 
+		a          { color: #3399cc; }
+		a:link     { color: #3399cc; text-decoration: underline; }
+		a:visited  { color: #3399cc; text-decoration: underline; }
+		a:active   { color: #3399cc; text-decoration: underline; }
+		a:hover    { color: #3399cc; text-decoration: underline; }
+	
+		/* ]]> */
+		</style>
+	 
+	</head>
+	<body>
+		<div id="content">
+			<div id="domaingraph_container">
+			
+			<!--[if !IE]> -->
+				<object classid="java:domaingraph.class" 
+            			type="application/x-java-applet"
+            			archive="domaingraph.jar"
+            			width="660" height="400"
+            			standby="Loading Processing software..." >
+            			
+					<param name="archive" value="domaingraph.jar" />
+				
+					<param name="mayscript" value="true" />
+					<param name="scriptable" value="true" />
+				
+					<param name="image" value="loading.gif" />
+					<param name="boxmessage" value="Loading Processing software..." />
+					<param name="boxbgcolor" value="#FFFFFF" />
+				
+					<param name="test_string" value="outer" />
+			<!--<![endif]-->
+				
+				<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" 
+						codebase="http://java.sun.com/update/1.4.2/jinstall-1_4_2_12-windows-i586.cab"
+						width="660" height="400"
+						standby="Loading Processing software..."  >
+						
+					<param name="code" value="domaingraph" />
+					<param name="archive" value="domaingraph.jar" />
+					
+					<param name="mayscript" value="true" />
+					<param name="scriptable" value="true" />
+					
+					<param name="image" value="loading.gif" />
+					<param name="boxmessage" value="Loading Processing software..." />
+					<param name="boxbgcolor" value="#FFFFFF" />
+					
+					<param name="test_string" value="inner" />
+					
+					<p>
+						<strong>
+							This browser does not have a Java Plug-in.
+							<br />
+							<a href="http://java.sun.com/products/plugin/downloads/index.html" title="Download Java Plug-in">
+								Get the latest Java Plug-in here.
+							</a>
+						</strong>
+					</p>
+				
+				</object>
+				
+			<!--[if !IE]> -->
+				</object>
+			<!--<![endif]-->
+			
+			</div>
+			
+			<p>
+			
+			</p>
+			
+			<p>
+			Source code: <a href="domaingraph.pde">domaingraph</a> 
+			</p>
+			
+			<p>
+			Built with <a href="http://processing.org" title="Processing.org">Processing</a>
+			</p>
+		</div>
+	</body>
+</html>
diff --git a/htroot/processing/domaingraph/applet/loading.gif b/htroot/processing/domaingraph/applet/loading.gif
new file mode 100755
index 000000000..1ddae5089
--- /dev/null
+++ b/htroot/processing/domaingraph/applet/loading.gif
diff --git a/htroot/processing/domaingraph/domaingraph.pde b/htroot/processing/domaingraph/domaingraph.pde
new file mode 100755
index 000000000..e79f083e7
--- /dev/null
+++ b/htroot/processing/domaingraph/domaingraph.pde
@@ -0,0 +1,227 @@
+// Domain visualization graph for YaCy
+// by Michael Christen
+//
+// this applet uses code and the physics engine from
+// http://www.cs.princeton.edu/~traer/physics/
+// from Jeffrey Traer Bernstein
+// redistribution is granted according to forum posting in
+// http://processing.org/discourse/yabb_beta/YaBB.cgi?board=os_libraries_tools;action=display;num=1139193613
+
+import traer.physics.*;
+import traer.animation.*;
+import processing.net.*;
+
+final float NODE_SIZE       = 6;
+final float EDGE_LENGTH     = 50;
+final float EDGE_STRENGTH   = 0.01;
+final float SPACER_STRENGTH = 10;
+
+ParticleSystem physics;
+Smoother3D centroid;
+PFont font;
+Client myClient; 
+Particle center0, center1; // two gravity centers to support object ordering for non-quadratic fields
+String parsingHostName = "";
+String parsingHostID = "";
+HashMap nodes = new HashMap(); // map that holds host objects
+
+void setup() {
+  
+  String[] fontList = PFont.list();
+  //println(fontList);
+  font = createFont(fontList[0], 32); //just take any, should be mostly Arial
+  textFont(font, 12); 
+  
+  size(660, 400);
+  smooth();
+  frameRate( 24 );
+  strokeWeight( 2 );
+  ellipseMode( CENTER );       
+  
+  physics = new ParticleSystem( 0, 0.25 );
+  centroid = new Smoother3D( 0.8 );
+
+  initializePhysics();
+  initRequest();
+}
+
+void initRequest() {
+  myClient = new Client(this, "localhost", 8080);
+  myClient.write("GET /xml/webstructure.xml HTTP/1.1\n");
+  myClient.write("Host: localhost\n\n");
+}
+
+void processRequestResponse() {
+  if (myClient.available() > 0) {
+    String line = myClient.readStringUntil((byte) 10);
+    //println("Line: " + line);
+    if (line == null) line = ""; else line = line.trim();
+    if (line.startsWith("<domain")) processDomain(parseProps(line.substring(7, line.length() - 1).trim()));
+    if (line.startsWith("<citation")) processCitation(parseProps(line.substring(9, line.length() - 2).trim()));
+  }
+}
+
+HashMap parseProps(String s) {
+  String[] l = s.split(" ");
+  HashMap map = new HashMap();
+  int p;
+  String z;
+  for (int i = 0; i < l.length; i++) {
+    p = l[i].indexOf("=");
+    if (p > 0) {
+      z = l[i].substring(p + 1).trim();
+      if (z.charAt(0) == '"') z = z.substring(1);
+      if (z.charAt(z.length() - 1) == '"') z = z.substring(0, z.length() - 1);
+      map.put(l[i].substring(0, p), z);
+    }
+  }
+  return map;
+}
+
+void processDomain(HashMap props) {
+  //println("Domain: " + props.toString());
+  parsingHostName = (String) props.get("host"); if (parsingHostName == null) parsingHostName = "";
+  parsingHostID = (String) props.get("id"); if (parsingHostID == null) parsingHostID = "";
+  host h = new host(parsingHostName, physics.makeParticle(1.0, random(0, EDGE_LENGTH * 30), random(- EDGE_LENGTH * 2, EDGE_LENGTH * 2), 0));
+  nodes.put(parsingHostID, h);
+  addAttraction(h.node);
+}
+
+void processCitation(HashMap props) {
+  //println("Citation: " + props.toString());
+  String host = (String) props.get("host"); if (host == null) host = "";
+  String id = (String) props.get("id"); if (id == null) id = "";
+  int count = 0;
+  try {
+  String counts = (String) props.get("count"); if (counts != null) count = Integer.parseInt(counts);
+  } catch (NumberFormatException e) {}
+  // find the two nodes that have a relation
+  host h = (host) nodes.get(id);
+  if (h == null) return; // host is not known TODO: store these and create relation later
+  host p = (host) nodes.get(parsingHostID); // this should be successful
+  addRelation(h.node, p.node);
+}
+
+void draw() {
+  processRequestResponse();
+  
+  physics.tick( 1.0 ); 
+  if (physics.numberOfParticles() > 1) updateCentroid();
+  centroid.tick();
+
+  background( 0 );
+  translate( width/2 , height/2 );
+  scale( centroid.z() );
+  translate( -centroid.x(), -centroid.y() );
+ 
+  drawNetwork();
+}
+
+void drawNetwork() {      
+  fill( 100, 255, 100 );
+  
+  // draw vertices
+  noStroke();
+  String name;
+  Iterator j = nodes.values().iterator();
+  host h;
+  while (j.hasNext()) {
+    h = (host) j.next();
+    Particle v = h.node;
+    ellipse(v.position().x(), v.position().y(), NODE_SIZE, NODE_SIZE);
+    name = h.name;
+    text(name, v.position().x() - (name.length() * 26 / 10), v.position().y() + 14);
+  }
+  
+  // draw center
+  /*
+  ellipse( center0.position().x(), center0.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center0";
+  text(name, center0.position().x() - (name.length() * 26 / 10), center0.position().y() + 14);
+  ellipse( center1.position().x(), center1.position().y(), NODE_SIZE * 2, NODE_SIZE * 2 );
+  name = "Center1";
+  text(name, center1.position().x() - (name.length() * 26 / 10), center1.position().y() + 14);
+  */
+  
+  // draw edges 
+  stroke( 160 );
+  beginShape( LINES );
+  for ( int i = 0; i < physics.numberOfSprings(); ++i ) {
+    Spring e = physics.getSpring( i );
+    Particle a = e.getOneEnd();
+    Particle b = e.getTheOtherEnd();
+    vertex( a.position().x(), a.position().y() );
+    vertex( b.position().x(), b.position().y() );
+  }
+  endShape();
+}
+
+void keyPressed() {
+  if ( key == 'c' ) {
+    initializePhysics();
+    return;
+  }
+  
+  if ( key == ' ' ) {
+    Particle p = physics.makeParticle();
+    addRelation(p, physics.getParticle( (int) random( 0, physics.numberOfParticles()-1) ));
+    addAttraction(p);
+    return;
+  }
+}
+
+void updateCentroid() {
+  float 
+    xMax = Float.NEGATIVE_INFINITY, 
+    xMin = Float.POSITIVE_INFINITY, 
+    yMin = Float.POSITIVE_INFINITY, 
+    yMax = Float.NEGATIVE_INFINITY;
+
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle p = physics.getParticle( i );
+    xMax = max( xMax, p.position().x() );
+    xMin = min( xMin, p.position().x() );
+    yMin = min( yMin, p.position().y() );
+    yMax = max( yMax, p.position().y() );
+  }
+  float deltaX = xMax-xMin;
+  float deltaY = yMax-yMin;
+  if ( deltaY > deltaX )
+    centroid.setTarget( xMin + 0.5*deltaX, yMin +0.5*deltaY, height/(deltaY+50) );
+  else
+    centroid.setTarget( xMin + 0.5*deltaX, yMin +0.5*deltaY, width/(deltaX+50) );
+}
+
+void initializePhysics() {
+  physics.clear();
+  center0 = physics.makeParticle(1.0, 0, 0, 0);
+  center0.makeFixed();
+  center1 = physics.makeParticle(1.0, EDGE_LENGTH * 30, 0, 0);
+  center1.makeFixed();
+  centroid.setValue( 0, 0, 1.0 );
+}
+
+void addAttraction(Particle p) {
+  physics.makeAttraction(center0, p, 5000.0, 3 * EDGE_LENGTH);
+  physics.makeAttraction(center1, p, 5000.0, 3 * EDGE_LENGTH);
+
+  // spacers
+  for ( int i = 0; i < physics.numberOfParticles(); ++i ) {
+    Particle q = physics.getParticle( i );
+    if (p != q) physics.makeAttraction( p, q, -SPACER_STRENGTH, 20);
+  }
+}
+
+void addRelation(Particle p, Particle other) {
+  physics.makeSpring( p, other, EDGE_STRENGTH, EDGE_STRENGTH, EDGE_LENGTH );
+  //p.moveTo( q.position().x() + random( -1, 1 ), q.position().y() + random( -1, 1 ), 0 );
+}
+
+static class host {
+  String name;
+  Particle node;
+  public host(String name, Particle node) {
+    this.name = name;
+    this.node = node;
+  }
+}