Lean and mean first prototype - to be improved!

20 files changed, 2695 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4beb56d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+.project
+.settings/
+.classpath
+*.swp
+*~
+*.tmp
+*.class
+target/
+
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..1a3a3e9
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,69 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>org.openslx</groupId>
+	<artifactId>dnbd3-status</artifactId>
+	<packaging>jar</packaging>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>DNBD3 Status Monitor</name>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<maven.test.skip>true</maven.test.skip>
+	</properties>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.1</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+					<optimize>true</optimize>
+				</configuration>
+			</plugin>
+			<plugin>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<phase>package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<archive>
+						<manifest>
+							<mainClass>org.openslx.dnbd3.status.App</mainClass>
+						</manifest>
+					</archive>
+
+					<descriptorRefs>
+						<descriptorRef>jar-with-dependencies</descriptorRef>
+					</descriptorRefs>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>com.google.code.gson</groupId>
+			<artifactId>gson</artifactId>
+			<version>2.2.4</version>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-math3</artifactId>
+			<version>3.5</version>
+		</dependency>
+		<dependency>
+			<groupId>ar.com.hjg</groupId>
+			<artifactId>pngj</artifactId>
+			<version>2.1.0</version>
+		</dependency>
+	</dependencies>
+</project>
\ No newline at end of file
diff --git a/src/main/java/fi/iki/elonen/NanoHTTPD.java b/src/main/java/fi/iki/elonen/NanoHTTPD.java
new file mode 100644
index 0000000..822a6bb
--- /dev/null
+++ b/src/main/java/fi/iki/elonen/NanoHTTPD.java
@@ -0,0 +1,1098 @@
+package fi.iki.elonen;
+
+/*
+ * #%L
+ * NanoHttpd-Core
+ * %%
+ * Copyright (C) 2012 - 2015 nanohttpd
+ * %%
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the nanohttpd nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * #L%
+ */
+
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.PushbackInputStream;
+import java.io.Reader;
+import java.io.UnsupportedEncodingException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketException;
+import java.net.SocketTimeoutException;
+import java.net.URLDecoder;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+import java.util.StringTokenizer;
+import java.util.TimeZone;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * A simple, tiny, nicely embeddable HTTP server in Java
+ * <p/>
+ * <p/>
+ * NanoHTTPD
+ * <p>
+ * Copyright (c) 2012-2013 by Paul S. Hawke, 2001,2005-2013 by Jarno Elonen, 2010 by Konstantinos
+ * Togias
+ * </p>
+ * <p/>
+ * <p/>
+ * <b>Features + limitations: </b>
+ * <ul>
+ * <p/>
+ * <li>Only one Java file</li>
+ * <li>Java 5 compatible</li>
+ * <li>Released as open source, Modified BSD licence</li>
+ * <li>No fixed config files, logging, authorization etc. (Implement yourself if you need them.)</li>
+ * <li>Supports parameter parsing of GET and POST methods (+ rudimentary PUT support in 1.25)</li>
+ * <li>Supports both dynamic content and file serving</li>
+ * <li>Supports file upload (since version 1.2, 2010)</li>
+ * <li>Supports partial content (streaming)</li>
+ * <li>Supports ETags</li>
+ * <li>Never caches anything</li>
+ * <li>Doesn't limit bandwidth, request time or simultaneous connections</li>
+ * <li>Default code serves files and shows all HTTP parameters and headers</li>
+ * <li>File server supports directory listing, index.html and index.htm</li>
+ * <li>File server supports partial content (streaming)</li>
+ * <li>File server supports ETags</li>
+ * <li>File server does the 301 redirection trick for directories without '/'</li>
+ * <li>File server supports simple skipping for files (continue download)</li>
+ * <li>File server serves also very long files without memory overhead</li>
+ * <li>Contains a built-in list of most common MIME types</li>
+ * <li>All header names are converted to lower case so they don't vary between browsers/clients</li>
+ * <p/>
+ * </ul>
+ * <p/>
+ * <p/>
+ * <b>How to use: </b>
+ * <ul>
+ * <p/>
+ * <li>Subclass and implement serve() and embed to your own program</li>
+ * <p/>
+ * </ul>
+ * <p/>
+ * See the separate "LICENSE.md" file for the distribution license (Modified BSD licence)
+ */
+public abstract class NanoHTTPD implements Runnable
+{
+	/**
+	 * Maximum time to wait on Socket.getInputStream().read() (in milliseconds)
+	 * This is required as the Keep-Alive HTTP connections would otherwise
+	 * block the socket reading thread forever (or as long the browser is open).
+	 */
+	public static final int SOCKET_READ_TIMEOUT = 15000;
+	/**
+	 * Common MIME type for dynamic content: plain text
+	 */
+	public static final String MIME_PLAINTEXT = "text/plain";
+	/**
+	 * Common MIME type for dynamic content: html
+	 */
+	public static final String MIME_HTML = "text/html";
+	/**
+	 * Pseudo-Parameter to use to store the actual query string in the parameters map for later
+	 * re-processing.
+	 */
+	private static final String QUERY_STRING_PARAMETER = "NanoHttpd.QUERY_STRING";
+	private final String hostname;
+	private final int myPort;
+	private ServerSocket myServerSocket;
+	private Set<Socket> openConnections = new HashSet<Socket>();
+	/**
+	 * Pluggable strategy for asynchronously executing requests.
+	 */
+	private AsyncRunner asyncRunner;
+
+	/**
+	 * Constructs an HTTP server on given port.
+	 */
+	public NanoHTTPD( int port )
+	{
+		this( null, port );
+	}
+
+	/**
+	 * Constructs an HTTP server on given hostname and port.
+	 */
+	public NanoHTTPD( String hostname, int port )
+	{
+		this.hostname = hostname;
+		this.myPort = port;
+		setAsyncRunner( new DefaultAsyncRunner() );
+	}
+
+	protected static final void safeClose( Closeable closeable )
+	{
+		if ( closeable != null ) {
+			try {
+				closeable.close();
+			} catch ( IOException e ) {
+			}
+		}
+	}
+
+	/**
+	 * Start the server.
+	 * 
+	 * @throws IOException if the socket is in use.
+	 */
+	@Override
+	public void run()
+	{
+		try {
+			myServerSocket = new ServerSocket();
+			myServerSocket.setReuseAddress( true );
+			myServerSocket.bind( ( hostname != null ) ? new InetSocketAddress( hostname, myPort ) : new InetSocketAddress( myPort ) );
+		} catch ( Exception e ) {
+			throw new RuntimeException( e );
+		}
+
+		do {
+			try {
+				final Socket finalAccept = myServerSocket.accept();
+				registerConnection( finalAccept );
+				finalAccept.setSoTimeout( SOCKET_READ_TIMEOUT );
+				final InputStream inputStream = finalAccept.getInputStream();
+				asyncRunner.exec( new Runnable() {
+					@Override
+					public void run()
+					{
+						OutputStream outputStream = null;
+						try {
+							outputStream = finalAccept.getOutputStream();
+							HTTPSession session = new HTTPSession( inputStream, outputStream, finalAccept.getInetAddress() );
+							while ( !finalAccept.isClosed() ) {
+								session.execute();
+							}
+						} catch ( Exception e ) {
+							// When the socket is closed by the client, we throw our own SocketException
+							// to break the  "keep alive" loop above.
+							if ( ! ( e instanceof SocketException && "NanoHttpd Shutdown".equals( e.getMessage() ) ) ) {
+								e.printStackTrace();
+							}
+						} finally {
+							safeClose( outputStream );
+							safeClose( inputStream );
+							safeClose( finalAccept );
+							unRegisterConnection( finalAccept );
+						}
+					}
+				} );
+			} catch ( IOException e ) {
+			}
+		} while ( !myServerSocket.isClosed() );
+	}
+
+	/**
+	 * Stop the server.
+	 */
+	public void stop()
+	{
+		try {
+			safeClose( myServerSocket );
+			closeAllConnections();
+		} catch ( Exception e ) {
+			e.printStackTrace();
+		}
+	}
+
+	/**
+	 * Registers that a new connection has been set up.
+	 * 
+	 * @param socket the {@link Socket} for the connection.
+	 */
+	public synchronized void registerConnection( Socket socket )
+	{
+		openConnections.add( socket );
+	}
+
+	/**
+	 * Registers that a connection has been closed
+	 * 
+	 * @param socket
+	 *           the {@link Socket} for the connection.
+	 */
+	public synchronized void unRegisterConnection( Socket socket )
+	{
+		openConnections.remove( socket );
+	}
+
+	/**
+	 * Forcibly closes all connections that are open.
+	 */
+	public synchronized void closeAllConnections()
+	{
+		for ( Socket socket : openConnections ) {
+			safeClose( socket );
+		}
+	}
+
+	public final int getListeningPort()
+	{
+		return myServerSocket == null ? -1 : myServerSocket.getLocalPort();
+	}
+
+	public final boolean wasStarted()
+	{
+		return myServerSocket != null;
+	}
+
+	public final boolean isAlive()
+	{
+		return wasStarted() && !myServerSocket.isClosed();
+	}
+
+	/**
+	 * Override this to customize the server.
+	 * <p/>
+	 * <p/>
+	 * (By default, this returns a 404 "Not Found" plain text error response.)
+	 * 
+	 * @param uri Percent-decoded URI without parameters, for example "/index.cgi"
+	 * @param method "GET", "POST" etc.
+	 * @param parms Parsed, percent decoded parameters from URI and, in case of POST, data.
+	 * @param headers Header entries, percent decoded
+	 * @return HTTP response, see class Response for details
+	 */
+	@Deprecated
+	public Response serve( String uri, Method method, Map<String, String> headers, Map<String, String> parms,
+			Map<String, String> files )
+	{
+		return new Response( Response.Status.NOT_FOUND, MIME_PLAINTEXT, "Not Found" );
+	}
+
+	/**
+	 * Override this to customize the server.
+	 * <p/>
+	 * <p/>
+	 * (By default, this returns a 404 "Not Found" plain text error response.)
+	 * 
+	 * @param session The HTTP session
+	 * @return HTTP response, see class Response for details
+	 */
+	public Response serve( IHTTPSession session )
+	{
+		Map<String, String> files = new HashMap<String, String>();
+		Method method = session.getMethod();
+		if ( Method.PUT.equals( method ) || Method.POST.equals( method ) ) {
+			try {
+				session.parseBody( files );
+			} catch ( IOException ioe ) {
+				return new Response( Response.Status.INTERNAL_ERROR, MIME_PLAINTEXT, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage() );
+			} catch ( ResponseException re ) {
+				return new Response( re.getStatus(), MIME_PLAINTEXT, re.getMessage() );
+			}
+		}
+
+		Map<String, String> parms = session.getParms();
+		parms.put( QUERY_STRING_PARAMETER, session.getQueryParameterString() );
+		return serve( session.getUri(), method, session.getHeaders(), parms, files );
+	}
+
+	/**
+	 * Decode percent encoded <code>String</code> values.
+	 * 
+	 * @param str the percent encoded <code>String</code>
+	 * @return expanded form of the input, for example "foo%20bar" becomes "foo bar"
+	 */
+	protected String decodePercent( String str )
+	{
+		String decoded = null;
+		try {
+			decoded = URLDecoder.decode( str, "UTF8" );
+		} catch ( UnsupportedEncodingException ignored ) {
+		}
+		return decoded;
+	}
+
+	/**
+	 * Decode parameters from a URL, handing the case where a single parameter name might have been
+	 * supplied several times, by return lists of values. In general these lists will contain a
+	 * single
+	 * element.
+	 * 
+	 * @param parms original <b>NanoHTTPD</b> parameters values, as passed to the
+	 *           <code>serve()</code> method.
+	 * @return a map of <code>String</code> (parameter name) to <code>List&lt;String&gt;</code> (a
+	 *         list of the values supplied).
+	 */
+	protected Map<String, List<String>> decodeParameters( Map<String, String> parms )
+	{
+		return this.decodeParameters( parms.get( QUERY_STRING_PARAMETER ) );
+	}
+
+	/**
+	 * Decode parameters from a URL, handing the case where a single parameter name might have been
+	 * supplied several times, by return lists of values. In general these lists will contain a
+	 * single
+	 * element.
+	 * 
+	 * @param queryString a query string pulled from the URL.
+	 * @return a map of <code>String</code> (parameter name) to <code>List&lt;String&gt;</code> (a
+	 *         list of the values supplied).
+	 */
+	protected Map<String, List<String>> decodeParameters( String queryString )
+	{
+		Map<String, List<String>> parms = new HashMap<String, List<String>>();
+		if ( queryString != null ) {
+			StringTokenizer st = new StringTokenizer( queryString, "&" );
+			while ( st.hasMoreTokens() ) {
+				String e = st.nextToken();
+				int sep = e.indexOf( '=' );
+				String propertyName = ( sep >= 0 ) ? decodePercent( e.substring( 0, sep ) ).trim() : decodePercent( e ).trim();
+				if ( !parms.containsKey( propertyName ) ) {
+					parms.put( propertyName, new ArrayList<String>() );
+				}
+				String propertyValue = ( sep >= 0 ) ? decodePercent( e.substring( sep + 1 ) ) : null;
+				if ( propertyValue != null ) {
+					parms.get( propertyName ).add( propertyValue );
+				}
+			}
+		}
+		return parms;
+	}
+
+	// ------------------------------------------------------------------------------- //
+	//
+	// Threading Strategy.
+	//
+	// ------------------------------------------------------------------------------- //
+
+	/**
+	 * Pluggable strategy for asynchronously executing requests.
+	 * 
+	 * @param asyncRunner new strategy for handling threads.
+	 */
+	public void setAsyncRunner( AsyncRunner asyncRunner )
+	{
+		this.asyncRunner = asyncRunner;
+	}
+
+	/**
+	 * HTTP Request methods, with the ability to decode a <code>String</code> back to its enum value.
+	 */
+	public enum Method
+	{
+		GET, PUT, POST, DELETE, HEAD, OPTIONS;
+
+		static Method lookup( String method )
+		{
+			for ( Method m : Method.values() ) {
+				if ( m.toString().equalsIgnoreCase( method ) ) {
+					return m;
+				}
+			}
+			return null;
+		}
+	}
+
+	/**
+	 * Pluggable strategy for asynchronously executing requests.
+	 */
+	public interface AsyncRunner
+	{
+		void exec( Runnable code );
+	}
+
+	// ------------------------------------------------------------------------------- //
+
+	/**
+	 * Default threading strategy for NanoHTTPD.
+	 * <p/>
+	 * <p>
+	 * By default, the server spawns a new Thread for every incoming request. These are set to
+	 * <i>daemon</i> status, and named according to the request number. The name is useful when
+	 * profiling the application.
+	 * </p>
+	 */
+	public static class DefaultAsyncRunner implements AsyncRunner
+	{
+		private long requestCount;
+		private ExecutorService pool = new ThreadPoolExecutor( 4, 32, 1, TimeUnit.MINUTES, new ArrayBlockingQueue<Runnable>( 2 ) );
+
+		@Override
+		public void exec( Runnable code )
+		{
+			try {
+				pool.submit( code );
+				++requestCount;
+				System.out.println( "NanoHttpd Request Processor (#" + requestCount + ")" );
+			} catch ( RejectedExecutionException e ) {
+				System.out.println( "Too many pending requests, dropping client..." );
+			}
+		}
+	}
+
+	/**
+	 * HTTP response. Return one of these from serve().
+	 */
+	public static class Response
+	{
+		/**
+		 * HTTP status code after processing, e.g. "200 OK", Status.OK
+		 */
+		private IStatus status;
+		/**
+		 * MIME type of content, e.g. "text/html"
+		 */
+		private String mimeType;
+		/**
+		 * Data of the response, may be null.
+		 */
+		private InputStream data;
+		/**
+		 * Headers for the HTTP response. Use addHeader() to add lines.
+		 */
+		private Map<String, String> header = new HashMap<String, String>();
+		/**
+		 * The request method that spawned this response.
+		 */
+		private Method requestMethod;
+		/**
+		 * Use chunkedTransfer
+		 */
+		private boolean chunkedTransfer;
+
+		/**
+		 * Default constructor: response = Status.OK, mime = MIME_HTML and your supplied message
+		 */
+		public Response( String msg )
+		{
+			this( Status.OK, MIME_HTML, msg );
+		}
+
+		/**
+		 * Basic constructor.
+		 */
+		public Response( IStatus status, String mimeType, InputStream data )
+		{
+			this.status = status;
+			this.mimeType = mimeType;
+			this.data = data;
+		}
+
+		/**
+		 * Convenience method that makes an InputStream out of given text.
+		 */
+		public Response( IStatus status, String mimeType, String txt )
+		{
+			this.status = status;
+			this.mimeType = mimeType;
+			try {
+				this.data = txt != null ? new ByteArrayInputStream( txt.getBytes( "UTF-8" ) ) : null;
+			} catch ( java.io.UnsupportedEncodingException uee ) {
+				uee.printStackTrace();
+			}
+		}
+
+		/**
+		 * Adds given line to the header.
+		 */
+		public void addHeader( String name, String value )
+		{
+			header.put( name, value );
+		}
+
+		public String getHeader( String name )
+		{
+			return header.get( name );
+		}
+
+		/**
+		 * Sends given response to the socket.
+		 */
+		protected void send( OutputStream outputStream )
+		{
+			String mime = mimeType;
+			SimpleDateFormat gmtFrmt = new SimpleDateFormat( "E, d MMM yyyy HH:mm:ss 'GMT'", Locale.US );
+			gmtFrmt.setTimeZone( TimeZone.getTimeZone( "GMT" ) );
+
+			try {
+				if ( status == null ) {
+					throw new Error( "sendResponse(): Status can't be null." );
+				}
+				PrintWriter pw = new PrintWriter( outputStream );
+				pw.print( "HTTP/1.1 " + status.getDescription() + " \r\n" );
+
+				if ( mime != null ) {
+					pw.print( "Content-Type: " + mime + "\r\n" );
+				}
+
+				if ( header == null || header.get( "Date" ) == null ) {
+					pw.print( "Date: " + gmtFrmt.format( new Date() ) + "\r\n" );
+				}
+
+				if ( header != null ) {
+					for ( String key : header.keySet() ) {
+						String value = header.get( key );
+						pw.print( key + ": " + value + "\r\n" );
+					}
+				}
+
+				sendConnectionHeaderIfNotAlreadyPresent( pw, header );
+
+				if ( requestMethod != Method.HEAD && chunkedTransfer ) {
+					sendAsChunked( outputStream, pw );
+				} else {
+					int pending = data != null ? data.available() : 0;
+					pending = sendContentLengthHeaderIfNotAlreadyPresent( pw, header, pending );
+					pw.print( "\r\n" );
+					pw.flush();
+					sendAsFixedLength( outputStream, pending );
+				}
+				outputStream.flush();
+				safeClose( data );
+			} catch ( IOException ioe ) {
+				// Couldn't write? No can do.
+			}
+		}
+
+		protected int sendContentLengthHeaderIfNotAlreadyPresent( PrintWriter pw, Map<String, String> header, int size )
+		{
+			for ( String headerName : header.keySet() ) {
+				if ( headerName.equalsIgnoreCase( "content-length" ) ) {
+					try {
+						return Integer.parseInt( header.get( headerName ) );
+					} catch ( NumberFormatException ex ) {
+						return size;
+					}
+				}
+			}
+
+			pw.print( "Content-Length: " + size + "\r\n" );
+			return size;
+		}
+
+		protected void sendConnectionHeaderIfNotAlreadyPresent( PrintWriter pw, Map<String, String> header )
+		{
+			if ( !headerAlreadySent( header, "connection" ) ) {
+				pw.print( "Connection: keep-alive\r\n" );
+			}
+		}
+
+		private boolean headerAlreadySent( Map<String, String> header, String name )
+		{
+			boolean alreadySent = false;
+			for ( String headerName : header.keySet() ) {
+				alreadySent |= headerName.equalsIgnoreCase( name );
+			}
+			return alreadySent;
+		}
+
+		private void sendAsChunked( OutputStream outputStream, PrintWriter pw ) throws IOException
+		{
+			pw.print( "Transfer-Encoding: chunked\r\n" );
+			pw.print( "\r\n" );
+			pw.flush();
+			int BUFFER_SIZE = 16 * 1024;
+			byte[] CRLF = "\r\n".getBytes();
+			byte[] buff = new byte[ BUFFER_SIZE ];
+			int read;
+			while ( ( read = data.read( buff ) ) > 0 ) {
+				outputStream.write( String.format( "%x\r\n", read ).getBytes() );
+				outputStream.write( buff, 0, read );
+				outputStream.write( CRLF );
+			}
+			outputStream.write( String.format( "0\r\n\r\n" ).getBytes() );
+		}
+
+		private void sendAsFixedLength( OutputStream outputStream, int pending ) throws IOException
+		{
+			if ( requestMethod != Method.HEAD && data != null ) {
+				int BUFFER_SIZE = 16 * 1024;
+				byte[] buff = new byte[ BUFFER_SIZE ];
+				while ( pending > 0 ) {
+					int read = data.read( buff, 0, ( ( pending > BUFFER_SIZE ) ? BUFFER_SIZE : pending ) );
+					if ( read <= 0 ) {
+						break;
+					}
+					outputStream.write( buff, 0, read );
+					pending -= read;
+				}
+			}
+		}
+
+		public IStatus getStatus()
+		{
+			return status;
+		}
+
+		public void setStatus( IStatus status )
+		{
+			this.status = status;
+		}
+
+		public String getMimeType()
+		{
+			return mimeType;
+		}
+
+		public void setMimeType( String mimeType )
+		{
+			this.mimeType = mimeType;
+		}
+
+		public InputStream getData()
+		{
+			return data;
+		}
+
+		public void setData( InputStream data )
+		{
+			this.data = data;
+		}
+
+		public Method getRequestMethod()
+		{
+			return requestMethod;
+		}
+
+		public void setRequestMethod( Method requestMethod )
+		{
+			this.requestMethod = requestMethod;
+		}
+
+		public void setChunkedTransfer( boolean chunkedTransfer )
+		{
+			this.chunkedTransfer = chunkedTransfer;
+		}
+
+		public interface IStatus
+		{
+			int getRequestStatus();
+
+			String getDescription();
+		}
+
+		/**
+		 * Some HTTP response status codes
+		 */
+		public enum Status implements IStatus
+		{
+			SWITCH_PROTOCOL( 101, "Switching Protocols" ), OK( 200, "OK" ), CREATED( 201, "Created" ), ACCEPTED( 202, "Accepted" ), NO_CONTENT( 204, "No Content" ), PARTIAL_CONTENT(
+					206, "Partial Content" ), REDIRECT( 301,
+					"Moved Permanently" ), NOT_MODIFIED( 304, "Not Modified" ), BAD_REQUEST( 400, "Bad Request" ), UNAUTHORIZED( 401,
+					"Unauthorized" ), FORBIDDEN( 403, "Forbidden" ), NOT_FOUND( 404, "Not Found" ), METHOD_NOT_ALLOWED( 405, "Method Not Allowed" ), RANGE_NOT_SATISFIABLE( 416,
+					"Requested Range Not Satisfiable" ), INTERNAL_ERROR( 500, "Internal Server Error" );
+			private final int requestStatus;
+			private final String description;
+
+			Status( int requestStatus, String description )
+			{
+				this.requestStatus = requestStatus;
+				this.description = description;
+			}
+
+			@Override
+			public int getRequestStatus()
+			{
+				return this.requestStatus;
+			}
+
+			@Override
+			public String getDescription()
+			{
+				return "" + this.requestStatus + " " + description;
+			}
+		}
+	}
+
+	public static final class ResponseException extends Exception
+	{
+		private static final long serialVersionUID = 6569838532917408380L;
+		private final Response.Status status;
+
+		public ResponseException( Response.Status status, String message )
+		{
+			super( message );
+			this.status = status;
+		}
+
+		public ResponseException( Response.Status status, String message, Exception e )
+		{
+			super( message, e );
+			this.status = status;
+		}
+
+		public Response.Status getStatus()
+		{
+			return status;
+		}
+	}
+
+	/**
+	 * Handles one session, i.e. parses the HTTP request and returns the response.
+	 */
+	public interface IHTTPSession
+	{
+		void execute() throws IOException;
+
+		Map<String, String> getParms();
+
+		Map<String, String> getHeaders();
+
+		/**
+		 * @return the path part of the URL.
+		 */
+		String getUri();
+
+		String getQueryParameterString();
+
+		Method getMethod();
+
+		InputStream getInputStream();
+
+		/**
+		 * Adds the files in the request body to the files map.
+		 * 
+		 * @param files map to modify
+		 */
+		void parseBody( Map<String, String> files ) throws IOException, ResponseException;
+	}
+
+	protected class HTTPSession implements IHTTPSession
+	{
+		public static final int BUFSIZE = 8192;
+		private final OutputStream outputStream;
+		private PushbackInputStream inputStream;
+		private int splitbyte;
+		private int rlen;
+		private String uri;
+		private Method method;
+		private Map<String, String> parms;
+		private Map<String, String> headers;
+		private String queryParameterString;
+		private String remoteIp;
+
+		public HTTPSession( InputStream inputStream, OutputStream outputStream )
+		{
+			this.inputStream = new PushbackInputStream( inputStream, BUFSIZE );
+			this.outputStream = outputStream;
+		}
+
+		public HTTPSession( InputStream inputStream, OutputStream outputStream, InetAddress inetAddress )
+		{
+			this.inputStream = new PushbackInputStream( inputStream, BUFSIZE );
+			this.outputStream = outputStream;
+			remoteIp = inetAddress.isLoopbackAddress() || inetAddress.isAnyLocalAddress() ? "127.0.0.1" : inetAddress.getHostAddress().toString();
+			headers = new HashMap<String, String>();
+		}
+
+		@Override
+		public void execute() throws IOException
+		{
+			try {
+				// Read the first 8192 bytes.
+				// The full header should fit in here.
+				// Apache's default header limit is 8KB.
+				// Do NOT assume that a single read will get the entire header at once!
+				byte[] buf = new byte[ BUFSIZE ];
+				splitbyte = 0;
+				rlen = 0;
+				{
+					int read = -1;
+					try {
+						read = inputStream.read( buf, 0, BUFSIZE );
+					} catch ( Exception e ) {
+						safeClose( inputStream );
+						safeClose( outputStream );
+						throw new SocketException( "NanoHttpd Shutdown" );
+					}
+					if ( read == -1 ) {
+						// socket was been closed
+						safeClose( inputStream );
+						safeClose( outputStream );
+						throw new SocketException( "NanoHttpd Shutdown" );
+					}
+					while ( read > 0 ) {
+						rlen += read;
+						splitbyte = findHeaderEnd( buf, rlen );
+						if ( splitbyte > 0 )
+							break;
+						read = inputStream.read( buf, rlen, BUFSIZE - rlen );
+					}
+				}
+
+				if ( splitbyte < rlen ) {
+					inputStream.unread( buf, splitbyte, rlen - splitbyte );
+				}
+
+				parms = new HashMap<String, String>();
+				if ( null == headers ) {
+					headers = new HashMap<String, String>();
+				} else {
+					headers.clear();
+				}
+
+				if ( null != remoteIp ) {
+					headers.put( "remote-addr", remoteIp );
+					headers.put( "http-client-ip", remoteIp );
+				}
+
+				// Create a BufferedReader for parsing the header.
+				BufferedReader hin = new BufferedReader( new InputStreamReader( new ByteArrayInputStream( buf, 0, rlen ) ) );
+
+				// Decode the header into parms and header java properties
+				Map<String, String> pre = new HashMap<String, String>();
+				decodeHeader( hin, pre, parms, headers );
+
+				method = Method.lookup( pre.get( "method" ) );
+				if ( method == null ) {
+					throw new ResponseException( Response.Status.BAD_REQUEST, "BAD REQUEST: Syntax error." );
+				}
+
+				uri = pre.get( "uri" );
+
+				// Ok, now do the serve()
+				Response r = serve( this );
+				if ( r == null ) {
+					throw new ResponseException( Response.Status.INTERNAL_ERROR, "SERVER INTERNAL ERROR: Serve() returned a null response." );
+				} else {
+					r.setRequestMethod( method );
+					r.send( outputStream );
+				}
+			} catch ( SocketException e ) {
+				// throw it out to close socket object (finalAccept)
+				throw e;
+			} catch ( SocketTimeoutException ste ) {
+				throw ste;
+			} catch ( IOException ioe ) {
+				Response r = new Response( Response.Status.INTERNAL_ERROR, MIME_PLAINTEXT, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage() );
+				r.send( outputStream );
+				safeClose( outputStream );
+			} catch ( ResponseException re ) {
+				Response r = new Response( re.getStatus(), MIME_PLAINTEXT, re.getMessage() );
+				r.send( outputStream );
+				safeClose( outputStream );
+			}
+		}
+
+		@Override
+		public void parseBody( Map<String, String> files ) throws IOException, ResponseException
+		{
+			final Reader in = new InputStreamReader( inputStream );
+			long size;
+			if ( headers.containsKey( "content-length" ) ) {
+				size = Integer.parseInt( headers.get( "content-length" ) );
+			} else if ( splitbyte < rlen ) {
+				size = rlen - splitbyte;
+			} else {
+				size = 0;
+			}
+
+			// If the method is POST, there may be parameters
+			// in data section, too, read it:
+			if ( Method.POST.equals( method ) ) {
+				String contentType = "";
+				String contentTypeHeader = headers.get( "content-type" );
+
+				StringTokenizer st = null;
+				if ( contentTypeHeader != null ) {
+					st = new StringTokenizer( contentTypeHeader, ",; " );
+					if ( st.hasMoreTokens() ) {
+						contentType = st.nextToken();
+					}
+				}
+
+				if ( "multipart/form-data".equalsIgnoreCase( contentType ) ) {
+					throw new ResponseException( Response.Status.BAD_REQUEST, "BAD REQUEST: Content type is multipart/form-data, which is not supported" );
+				} else {
+					String postLine = "";
+					StringBuilder postLineBuffer = new StringBuilder();
+					char pbuf[] = new char[ 512 ];
+					while ( rlen >= 0 && size > 0 && !postLine.endsWith( "\r\n" ) ) {
+						rlen = in.read( pbuf, 0, (int)Math.min( size, 512 ) );
+						if ( rlen <= 0 )
+							break;
+						postLine = String.valueOf( pbuf, 0, rlen );
+						postLineBuffer.append( postLine );
+					}
+					postLine = postLineBuffer.toString().trim();
+					// Handle application/x-www-form-urlencoded
+					if ( "application/x-www-form-urlencoded".equalsIgnoreCase( contentType ) ) {
+						decodeParms( postLine, parms );
+					} else if ( postLine.length() != 0 ) {
+						// Special case for raw POST data => create a special files entry "postData" with raw content data
+						files.put( "postData", postLine );
+					}
+				}
+			}
+		}
+
+		/**
+		 * Decodes the sent headers and loads the data into Key/value pairs
+		 */
+		private void decodeHeader( BufferedReader in, Map<String, String> pre, Map<String, String> parms, Map<String, String> headers )
+				throws ResponseException
+		{
+			try {
+				// Read the request line
+				String inLine = in.readLine();
+				if ( inLine == null ) {
+					return;
+				}
+
+				StringTokenizer st = new StringTokenizer( inLine );
+				if ( !st.hasMoreTokens() ) {
+					throw new ResponseException( Response.Status.BAD_REQUEST, "BAD REQUEST: Syntax error. Usage: GET /example/file.html" );
+				}
+
+				pre.put( "method", st.nextToken() );
+
+				if ( !st.hasMoreTokens() ) {
+					throw new ResponseException( Response.Status.BAD_REQUEST, "BAD REQUEST: Missing URI. Usage: GET /example/file.html" );
+				}
+
+				String uri = st.nextToken();
+
+				// Decode parameters from the URI
+				int qmi = uri.indexOf( '?' );
+				if ( qmi >= 0 ) {
+					decodeParms( uri.substring( qmi + 1 ), parms );
+					uri = decodePercent( uri.substring( 0, qmi ) );
+				} else {
+					uri = decodePercent( uri );
+				}
+
+				// If there's another token, its protocol version,
+				// followed by HTTP headers. Ignore version but parse headers.
+				// NOTE: this now forces header names lower case since they are
+				// case insensitive and vary by client.
+				if ( st.hasMoreTokens() ) {
+					String line = in.readLine();
+					while ( line != null && line.trim().length() > 0 ) {
+						int p = line.indexOf( ':' );
+						if ( p >= 0 )
+							headers.put( line.substring( 0, p ).trim().toLowerCase( Locale.US ), line.substring( p + 1 ).trim() );
+						line = in.readLine();
+					}
+				}
+
+				pre.put( "uri", uri );
+			} catch ( IOException ioe ) {
+				throw new ResponseException( Response.Status.INTERNAL_ERROR, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage(), ioe );
+			}
+		}
+
+		/**
+		 * Find byte index separating header from body. It must be the last byte of the first two
+		 * sequential new lines.
+		 */
+		private int findHeaderEnd( final byte[] buf, int rlen )
+		{
+			int splitbyte = 0;
+			while ( splitbyte + 3 < rlen ) {
+				if ( buf[splitbyte] == '\r' && buf[splitbyte + 1] == '\n' && buf[splitbyte + 2] == '\r' && buf[splitbyte + 3] == '\n' ) {
+					return splitbyte + 4;
+				}
+				splitbyte++;
+			}
+			return 0;
+		}
+
+		/**
+		 * Decodes parameters in percent-encoded URI-format ( e.g.
+		 * "name=Jack%20Daniels&pass=Single%20Malt" ) and
+		 * adds them to given Map. NOTE: this doesn't support multiple identical keys due to the
+		 * simplicity of Map.
+		 */
+		private void decodeParms( String parms, Map<String, String> p )
+		{
+			if ( parms == null ) {
+				queryParameterString = "";
+				return;
+			}
+
+			queryParameterString = parms;
+			StringTokenizer st = new StringTokenizer( parms, "&" );
+			while ( st.hasMoreTokens() ) {
+				String e = st.nextToken();
+				int sep = e.indexOf( '=' );
+				if ( sep >= 0 ) {
+					p.put( decodePercent( e.substring( 0, sep ) ).trim(),
+							decodePercent( e.substring( sep + 1 ) ) );
+				} else {
+					p.put( decodePercent( e ).trim(), "" );
+				}
+			}
+		}
+
+		@Override
+		public final Map<String, String> getParms()
+		{
+			return parms;
+		}
+
+		public String getQueryParameterString()
+		{
+			return queryParameterString;
+		}
+
+		@Override
+		public final Map<String, String> getHeaders()
+		{
+			return headers;
+		}
+
+		@Override
+		public final String getUri()
+		{
+			return uri;
+		}
+
+		@Override
+		public final Method getMethod()
+		{
+			return method;
+		}
+
+		@Override
+		public final InputStream getInputStream()
+		{
+			return inputStream;
+		}
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/App.java b/src/main/java/org/openslx/dnbd3/status/App.java
new file mode 100644
index 0000000..9f7ef5f
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/App.java
@@ -0,0 +1,14 @@
+package org.openslx.dnbd3.status;
+
+import java.io.IOException;
+
+public class App
+{
+
+	public static void main( String[] args ) throws IOException
+	{
+		WebServer ws = new WebServer( 8888 );
+		ws.run();
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/StatisticsGenerator.java b/src/main/java/org/openslx/dnbd3/status/StatisticsGenerator.java
new file mode 100644
index 0000000..777ce7a
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/StatisticsGenerator.java
@@ -0,0 +1,146 @@
+package org.openslx.dnbd3.status;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+import org.openslx.dnbd3.status.output.EdgeSerializer;
+import org.openslx.dnbd3.status.output.OutputMain;
+import org.openslx.dnbd3.status.output.ServerStats;
+import org.openslx.dnbd3.status.poller.ServerPoller;
+import org.openslx.dnbd3.status.rpc.Client;
+import org.openslx.dnbd3.status.rpc.Status;
+import org.openslx.graph.ClientNode;
+import org.openslx.graph.Edge;
+import org.openslx.graph.Graph;
+import org.openslx.graph.Node;
+import org.openslx.graph.ServerNode;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+public class StatisticsGenerator
+{
+	private final List<ServerPoller> pollers;
+	private volatile long lastUpdate = 0;
+	private ExecutorService threadPool = new ThreadPoolExecutor( 1, 6, 1, TimeUnit.MINUTES, new ArrayBlockingQueue<Runnable>( 100 ) );
+	private List<Future<Status>> futureStatusList = new ArrayList<>();
+	private List<Status> statusList = new ArrayList<>();
+	private final Gson jsonBuilder;
+
+	private final Graph graph = new Graph( "DNBD 3  Status" );
+	private byte[] imgData = null;
+	private final OutputMain output = new OutputMain();
+
+	public StatisticsGenerator( List<ServerPoller> pollers )
+	{
+		this.pollers = pollers;
+		for ( ServerPoller poller : pollers ) {
+			Node server = new ServerNode( poller.getAddress() );
+			server.activate();
+			graph.addNode( server );
+		}
+		// Prepare json serializer for graph
+		final GsonBuilder gsonBuilder = new GsonBuilder();
+		gsonBuilder.excludeFieldsWithoutExposeAnnotation();
+		gsonBuilder.registerTypeHierarchyAdapter( Edge.class, new EdgeSerializer() );
+		jsonBuilder = gsonBuilder.create();
+		output.graph = graph;
+		output.servers = new ArrayList<>();
+		output.timestamp = 0;
+	}
+
+	private synchronized void updateAll()
+	{
+		futureStatusList.clear();
+		for ( final ServerPoller p : pollers ) {
+			Future<Status> ret = threadPool.submit( new Callable<Status>() {
+				@Override
+				public Status call() throws Exception
+				{
+					return p.update();
+				}
+			} );
+			futureStatusList.add( ret );
+		}
+		statusList.clear();
+		output.servers.clear();
+		for ( Future<Status> future : futureStatusList ) {
+			Status status;
+			try {
+				status = future.get();
+			} catch ( Exception e ) {
+				continue;
+			}
+			if ( status == null )
+				continue;
+			statusList.add( status );
+			ServerStats srv = new ServerStats();
+			srv.address = status.getAddress();
+			srv.bytesReceived = status.getBytesReceived();
+			srv.bytesSent = status.getBytesSent();
+			for ( Client c : status.getClients() ) {
+				srv.bytesSent += c.getBytesSent();
+			}
+			srv.clientCount = status.getClients().size();
+			srv.uptime = status.getUptime();
+			output.servers.add( srv );
+		}
+		output.timestamp = System.currentTimeMillis();
+		synchronized ( graph ) {
+			graph.decay();
+			for ( Status status : statusList ) {
+				String serverIp = status.getAddress();
+				Node server = graph.getNode( serverIp );
+				if ( server == null )
+					server = new ServerNode( serverIp );
+				server.activate();
+				for ( Client client : status.getClients() ) {
+					if ( client.getAddress() == null )
+						continue;
+					String ip = client.getAddress().replaceFirst( "\\:\\d+$", "" );
+					Node n = graph.getNode( ip );
+					if ( n == null )
+						n = new ClientNode( ip );
+					n.activate();
+					graph.setEdge( server, n, ( client.getBytesSent() >> 12 ) + 1 );
+				}
+			}
+			imgData = null;
+		}
+	}
+
+	private synchronized void ensureUpToDate()
+	{
+		final long now = System.currentTimeMillis();
+		if ( now - lastUpdate > 1900 ) {
+			lastUpdate = now;
+			updateAll();
+		}
+	}
+
+	public byte[] getImagePng()
+	{
+		ensureUpToDate();
+		synchronized ( graph ) {
+			if ( imgData == null ) {
+				imgData = graph.makeNextImage();
+			}
+		}
+		return imgData;
+	}
+
+	public String getJson()
+	{
+		ensureUpToDate();
+		synchronized ( graph ) {
+			return jsonBuilder.toJson( output );
+		}
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/WebServer.java b/src/main/java/org/openslx/dnbd3/status/WebServer.java
new file mode 100644
index 0000000..14d9a09
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/WebServer.java
@@ -0,0 +1,100 @@
+package org.openslx.dnbd3.status;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.net.URLConnection;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.openslx.dnbd3.status.poller.ServerPoller;
+
+import fi.iki.elonen.NanoHTTPD;
+
+public class WebServer extends NanoHTTPD
+{
+
+	private final StatisticsGenerator imageGenerator;
+
+	public WebServer( int port )
+	{
+		super( port );
+		List<ServerPoller> pollers = new ArrayList<>();
+		pollers.add( new ServerPoller( "132.230.8.113", 5003 ) );
+		pollers.add( new ServerPoller( "132.230.4.60", 5003 ) );
+		pollers.add( new ServerPoller( "132.230.4.1", 5003 ) );
+		imageGenerator = new StatisticsGenerator( pollers );
+	}
+
+	@Override
+	public Response serve( IHTTPSession session )
+	{
+		String uri = session.getUri();
+
+		// Special/dynamic
+		if ( uri.equals( "/image.png" ) )
+			return serveImage();
+		if ( uri.equals( "/data.json" ) )
+			return serveJson();
+
+		// Static files
+		if ( uri.equals( "/" ) )
+			uri = "/index.html";
+
+		File f = new File( "./static/" + uri.replace( "/", "" ) );
+		if ( f.isFile() ) {
+			InputStream is = null;
+			try {
+				is = new FileInputStream( f );
+				/*
+				// TODO: Shit doesn't work
+				return new NanoHTTPD.Response( NanoHTTPD.Response.Status.OK,
+						URLConnection.guessContentTypeFromName( f.getName() ), is );
+						*/
+				ByteArrayOutputStream baos = new ByteArrayOutputStream();
+				byte[] buffer = new byte[ 10000 ];
+				for ( ;; ) {
+					int ret = is.read( buffer );
+					if ( ret <= 0 )
+						break;
+					baos.write( buffer, 0, ret );
+				}
+				return new NanoHTTPD.Response( NanoHTTPD.Response.Status.OK,
+						URLConnection.guessContentTypeFromName( f.getName() ), baos.toString( "UTF-8" ) );
+			} catch ( Exception e ) {
+				return new NanoHTTPD.Response( NanoHTTPD.Response.Status.INTERNAL_ERROR,
+						"text/plain", "Internal Server Error" );
+			} finally {
+				safeClose( is );
+			}
+		}
+
+		return new NanoHTTPD.Response( NanoHTTPD.Response.Status.NOT_FOUND, "text/plain", "Nicht gefunden!" );
+	}
+
+	private NanoHTTPD.Response serveImage()
+	{
+		InputStream is = null;
+		byte[] imgData = imageGenerator.getImagePng();
+		if ( imgData != null )
+			is = new ByteArrayInputStream( imgData );
+		if ( is == null ) {
+			return new NanoHTTPD.Response( NanoHTTPD.Response.Status.INTERNAL_ERROR, "text/plain", "Internal Server Error" );
+		} else {
+			return new NanoHTTPD.Response( NanoHTTPD.Response.Status.OK, "image/png", is );
+		}
+	}
+
+	private NanoHTTPD.Response serveJson()
+	{
+		String data = imageGenerator.getJson();
+		if ( data == null ) {
+			return new NanoHTTPD.Response( NanoHTTPD.Response.Status.INTERNAL_ERROR, "text/plain", "Internal Server Error" );
+		} else {
+			return new NanoHTTPD.Response( NanoHTTPD.Response.Status.OK, "application/json", data );
+		}
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/output/EdgeSerializer.java b/src/main/java/org/openslx/dnbd3/status/output/EdgeSerializer.java
new file mode 100644
index 0000000..e014bb3
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/output/EdgeSerializer.java
@@ -0,0 +1,25 @@
+package org.openslx.dnbd3.status.output;
+
+import java.lang.reflect.Type;
+
+import org.openslx.graph.Edge;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+public class EdgeSerializer implements JsonSerializer<Edge>
+{
+
+	@Override
+	public JsonElement serialize( Edge src, Type typeOfSrc, JsonSerializationContext context )
+	{
+		final JsonObject out = new JsonObject();
+		out.addProperty( "source", src.getSource().getId() );
+		out.addProperty( "target", src.getTarget().getId() );
+		out.addProperty( "width", src.getWeight() );
+		return out;
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/output/OutputMain.java b/src/main/java/org/openslx/dnbd3/status/output/OutputMain.java
new file mode 100644
index 0000000..c3204e7
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/output/OutputMain.java
@@ -0,0 +1,19 @@
+package org.openslx.dnbd3.status.output;
+
+import java.util.List;
+
+import org.openslx.graph.Graph;
+
+import com.google.gson.annotations.Expose;
+
+public class OutputMain
+{
+
+	@Expose
+	public Graph graph;
+	@Expose
+	public List<ServerStats> servers;
+	@Expose
+	public long timestamp;
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/output/ServerStats.java b/src/main/java/org/openslx/dnbd3/status/output/ServerStats.java
new file mode 100644
index 0000000..c58abb3
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/output/ServerStats.java
@@ -0,0 +1,19 @@
+package org.openslx.dnbd3.status.output;
+
+import com.google.gson.annotations.Expose;
+
+public class ServerStats
+{
+
+	@Expose
+	public String address;
+	@Expose
+	public int clientCount;
+	@Expose
+	public long uptime;
+	@Expose
+	public long bytesSent;
+	@Expose
+	public long bytesReceived;
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java b/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java
new file mode 100644
index 0000000..bfa70fb
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/poller/ServerPoller.java
@@ -0,0 +1,70 @@
+package org.openslx.dnbd3.status.poller;
+
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import org.openslx.dnbd3.status.rpc.Status;
+
+import com.google.gson.Gson;
+
+/**
+ * Polling a dnbd3 server for its status.
+ * 
+ */
+public class ServerPoller
+{
+
+	private final String address;
+	private final String server;
+	private final Gson parseGson = new Gson();
+
+	public ServerPoller( String host, int port )
+	{
+		this.address = host;
+		this.server = "http://" + host + ":" + port + "/";
+	}
+
+	public Status update()
+	{
+		HttpURLConnection con = null;
+		InputStream is;
+		try {
+			con = (HttpURLConnection)new URL( this.server ).openConnection();
+			con.setRequestMethod( "GET" );
+
+			con.setConnectTimeout( 1000 );
+			con.setReadTimeout( 3000 );
+
+			if ( con.getResponseCode() != HttpURLConnection.HTTP_OK ) {
+				return null;
+			}
+
+			is = con.getInputStream();
+		} catch ( java.net.SocketTimeoutException e ) {
+			return null;
+		} catch ( java.io.IOException e ) {
+			return null;
+		}
+		// Now read data
+		Status status;
+		try {
+			status = parseGson.fromJson( new InputStreamReader( is ), Status.class );
+			status.setAddress( address );
+			status.setTimestamp( System.currentTimeMillis() );
+		} catch ( Exception e ) {
+			e.printStackTrace();
+			status = null;
+		}
+		// TODO: http://docs.oracle.com/javase/6/docs/technotes/guides/net/http-keepalive.html
+		// once dnbd3 server supports keep-alive connections
+		return status;
+	}
+
+	public String getAddress()
+	{
+		return address;
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/rpc/Client.java b/src/main/java/org/openslx/dnbd3/status/rpc/Client.java
new file mode 100644
index 0000000..fcb8e3e
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/rpc/Client.java
@@ -0,0 +1,31 @@
+package org.openslx.dnbd3.status.rpc;
+
+public class Client
+{
+
+	private String address = null;
+	private int imageId = -1;
+	private long bytesSent = -1;
+
+	public String getAddress()
+	{
+		return address;
+	}
+
+	public int getImageId()
+	{
+		return imageId;
+	}
+
+	public long getBytesSent()
+	{
+		return bytesSent;
+	}
+
+	@Override
+	public String toString()
+	{
+		return "[Addr: " + address + ", image: " + imageId + "]";
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/rpc/Image.java b/src/main/java/org/openslx/dnbd3/status/rpc/Image.java
new file mode 100644
index 0000000..910db82
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/rpc/Image.java
@@ -0,0 +1,37 @@
+package org.openslx.dnbd3.status.rpc;
+
+public class Image
+{
+
+	private String name = null;
+	private int rid = -1;
+	private int complete = -1;
+	private int users = -1;
+
+	public String getName()
+	{
+		return name;
+	}
+
+	public int getRid()
+	{
+		return rid;
+	}
+
+	public int getComplete()
+	{
+		return complete;
+	}
+
+	public int getUsers()
+	{
+		return users;
+	}
+
+	@Override
+	public String toString()
+	{
+		return "[" + name + " (users: " + users + ")]";
+	}
+
+}
diff --git a/src/main/java/org/openslx/dnbd3/status/rpc/Status.java b/src/main/java/org/openslx/dnbd3/status/rpc/Status.java
new file mode 100644
index 0000000..07fc782
--- /dev/null
+++ b/src/main/java/org/openslx/dnbd3/status/rpc/Status.java
@@ -0,0 +1,73 @@
+package org.openslx.dnbd3.status.rpc;
+
+import java.util.List;
+
+public class Status
+{
+
+	private long bytesReceived = -1;
+	private long bytesSent = -1;
+	private int uptime = -1;
+	private List<Image> images = null;
+	private List<Client> clients = null;
+	private String address = null;
+	private long timeStamp = -1;
+
+	public long getBytesReceived()
+	{
+		return bytesReceived;
+	}
+
+	public long getBytesSent()
+	{
+		return bytesSent;
+	}
+
+	public int getUptime()
+	{
+		return uptime;
+	}
+
+	public List<Image> getImages()
+	{
+		return images;
+	}
+
+	public List<Client> getClients()
+	{
+		return clients;
+	}
+
+	public String getAddress()
+	{
+		return address;
+	}
+
+	public void setAddress( String address )
+	{
+		this.address = address;
+	}
+
+	@Override
+	public String toString()
+	{
+		String ret = "(in: " + bytesReceived + ", out: " + bytesSent;
+		if ( clients != null )
+			ret += ", clients: (" + clients.toString() + ")";
+		if ( images != null )
+			ret += ", images: (" + images.toString() + ")";
+		ret += ")";
+		return ret;
+	}
+
+	public void setTimestamp( long currentTimeMillis )
+	{
+		this.timeStamp = currentTimeMillis;
+	}
+
+	public long getTimestamp()
+	{
+		return this.timeStamp;
+	}
+
+}
diff --git a/src/main/java/org/openslx/graph/ClientNode.java b/src/main/java/org/openslx/graph/ClientNode.java
new file mode 100644
index 0000000..2d4d1f4
--- /dev/null
+++ b/src/main/java/org/openslx/graph/ClientNode.java
@@ -0,0 +1,24 @@
+package org.openslx.graph;
+
+import java.awt.Color;
+
+public class ClientNode extends Node
+{
+
+	private static final long serialVersionUID = 3569234002180936927L;
+
+	public ClientNode( String ip )
+	{
+		super( ip, ip, null );
+		setDesiredDistance( 2 );
+		setRadius( 4 );
+		setColor( Color.BLUE );
+	}
+
+	@Override
+	public int getMaxHealth()
+	{
+		return 5;
+	}
+
+}
diff --git a/src/main/java/org/openslx/graph/Edge.java b/src/main/java/org/openslx/graph/Edge.java
new file mode 100644
index 0000000..ece5250
--- /dev/null
+++ b/src/main/java/org/openslx/graph/Edge.java
@@ -0,0 +1,128 @@
+package org.openslx.graph;

+

+import java.awt.Color;

+

+import org.apache.commons.math3.util.FastMath;

+

+public class Edge implements java.io.Serializable

+{

+	private static final long serialVersionUID = 4401455477347084262L;

+	private Node _source;

+	private Node _target;

+	private double _weight;

+	private String _id = null;

+	private int _age = 0;

+	private static final Color[] COLORS = new Color[ 20 ];

+	private final int _maxHealth;

+	private int _health;

+

+	static

+	{

+		for ( int i = 0; i < COLORS.length; ++i ) {

+			int r = blend( 255, 100, i, COLORS.length - 1 );

+			int g = blend( 0, 100, i, COLORS.length - 1 );

+			int b = blend( 0, 255, i, COLORS.length - 1 );

+			COLORS[i] = new Color( r, g, b );

+		}

+	}

+

+	private static int blend( int a, int b, int current, int max )

+	{

+		a *= a;

+		b *= b;

+		return (int)FastMath.sqrt( ( ( b * current ) + ( a * ( max - current ) ) ) / max );

+	}

+

+	public Edge( Node source, Node target )

+	{

+		// Note that this graph is actually undirected.

+		_source = source;

+		_target = target;

+		_weight = 0;

+		_maxHealth = Math.max( source.getMaxHealth(), target.getMaxHealth() );

+		_health = _maxHealth;

+	}

+

+	public void resetWeight()

+	{

+		if ( _health == _maxHealth && _maxHealth != 1 && _source.wasActivated() && _target.wasActivated() ) {

+			_health = 1;

+		} else {

+			_health--;

+		}

+		_age++;

+	}

+

+	public boolean isAlive()

+	{

+		return _health > 0;

+	}

+

+	public void addWeight( double weight )

+	{

+		_weight += weight;

+		_health = _maxHealth;

+	}

+

+	public double getWeight()

+	{

+		return _weight;

+	}

+

+	public Node getSource()

+	{

+		return _source;

+	}

+

+	public Node getTarget()

+	{

+		return _target;

+	}

+

+	public boolean equals( Object o )

+	{

+		if ( o instanceof Edge ) {

+			Edge other = (Edge)o;

+			return ( _source.equals( other._source ) && _target.equals( other._target ) ) || ( _source.equals( other._target ) && _target.equals( other._source ) );

+		}

+		return false;

+	}

+

+	public boolean hasNode( Node node )

+	{

+		return _source.equals( node ) || _target.equals( node );

+	}

+

+	public double getLengthSquared()

+	{

+		final double dx = _source.getX() - _target.getX();

+		final double dy = _source.getY() - _target.getY();

+		return dx * dx + dy * dy;

+	}

+

+	public int hashCode()

+	{

+		return _source.hashCode() ^ _target.hashCode();

+	}

+

+	public String toString()

+	{

+		return _source + " " + _target + " w(" + _weight + ")";

+	}

+

+	public String getId()

+	{

+		if ( _id == null ) {

+			if ( _source.getId().compareTo( _target.getId() ) > 0 )

+				_id = _target.getId() + "==" + _source.getId();

+			_id = _source.getId() + "==" + _target.getId();

+		}

+		return _id;

+	}

+

+	public Color getColor()

+	{

+		return COLORS[_age >= COLORS.length ? COLORS.length - 1 : _age];

+	}

+

+}

diff --git a/src/main/java/org/openslx/graph/Graph.java b/src/main/java/org/openslx/graph/Graph.java
new file mode 100644
index 0000000..b3ab8b2
--- /dev/null
+++ b/src/main/java/org/openslx/graph/Graph.java
@@ -0,0 +1,559 @@
+package org.openslx.graph;

+

+import java.awt.BasicStroke;

+import java.awt.Color;

+import java.awt.Font;

+import java.awt.Graphics2D;

+import java.awt.RenderingHints;

+import java.awt.Stroke;

+import java.awt.image.BufferedImage;

+import java.io.ByteArrayOutputStream;

+import java.util.ArrayList;

+import java.util.Collection;

+import java.util.Date;

+import java.util.HashMap;

+import java.util.HashSet;

+import java.util.Iterator;

+import java.util.List;

+import java.util.Map;

+import java.util.Set;

+

+import org.apache.commons.math3.util.FastMath;

+

+import com.google.gson.annotations.Expose;

+

+/**

+ * The Graph stores the Nodes and Edges, and InferenceHeurisics to allow

+ * the structure of the graph to be modified.

+ */

+public class Graph implements java.io.Serializable

+{

+

+	private static final long serialVersionUID = 5488288903546706793L;

+	private String _label;

+	private String _caption = "servers are grey, clients are blue, sugar is sweet, and so are you";

+	private Map<Node, Node> _nodes = new HashMap<>();

+	private Map<Edge, Edge> _edges = new HashMap<>();

+	

+	@Expose

+	private Collection<Node> nodes = _nodes.values();

+	@Expose

+	private Collection<Edge> edges = _edges.values();

+

+	private double minX = Double.POSITIVE_INFINITY;

+	private double maxX = Double.NEGATIVE_INFINITY;

+	private double minY = Double.POSITIVE_INFINITY;

+	private double maxY = Double.NEGATIVE_INFINITY;

+	private double maxWeight = 0;

+

+	private int _frameCount = 0;

+

+	private static final Color COLOR_BG = new Color( 250, 250, 255 );

+	private static final Color COLOR_TITLE = new Color( 200, 200, 255 );

+	private static final Color COLOR_LABEL = new Color( 0, 0, 20 );

+	private static final Color COLOR_LABEL_SHADOW = new Color( 220, 220, 220 );

+	private static final Color COLOR_TITLE2 = new Color( 190, 190, 210 );

+	private static final Color COLOR_EDGE = new Color( 100, 100, 255 );

+

+	private static final int IMG_X = 1280;

+	private static final int IMG_Y = 1024;

+

+	private final Graphics2D graphicsContext;

+	private final PngRenderer renderer;

+

+	public Graph( String label )

+	{

+		_label = label;

+		BufferedImage targetImage = new BufferedImage( IMG_X, IMG_Y, BufferedImage.TYPE_INT_ARGB );

+		graphicsContext = targetImage.createGraphics();

+		graphicsContext.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );

+		renderer = new PngRenderer( targetImage );

+	}

+

+	// Add a Node to the Graph.

+	public void addNode( Node node )

+	{

+		// Only add the Node to the HashMap if it's not already in there.

+		if ( _nodes.containsKey( node ) )

+			return;

+		_nodes.put( node, node );

+	}

+

+	// Add an Edge to the Graph. Increment the weighting if it already exists.

+	public void setEdge( Node source, Node target, double weight )

+	{

+		// Do not add self-edges or weights that are not positive.

+		if ( source.equals( target ) || weight <= 0 ) {

+			return;

+		}

+

+		addNode( source );

+		addNode( target );

+

+		// Add the Edge to the HashMap, or find the existing entry.

+		Edge edge = _edges.get( new Edge( source, target ) );

+		if ( edge == null ) {

+			source = _nodes.get( source );

+			target = _nodes.get( target );

+			edge = new Edge( source, target );

+			_edges.put( edge, edge );

+		}

+		// Set the edge weight.

+		edge.addWeight( weight );

+	}

+

+	// Remove a Node from the Graph, along with all of its emanating Edges.

+	public boolean removeNode( Node node )

+	{

+		if ( !_nodes.containsKey( node ) )

+			return false;

+		// Remove the Node from the HashMap.

+		_nodes.remove( node );

+

+		// Remove all Edges that connect to the removed Node.

+		Iterator<Edge> edgeIt = _edges.keySet().iterator();

+		while ( edgeIt.hasNext() ) {

+			Edge edge = edgeIt.next();

+			if ( edge.getSource().equals( node ) || edge.getTarget().equals( node ) ) {

+				edgeIt.remove();

+			}

+		}

+		return true;

+	}

+

+	// Return true if the Graph contains the Node.

+	// (This does not necessarily imply that the Node is visible).

+	public boolean contains( Node node )

+	{

+		return _nodes.containsKey( node );

+	}

+

+	// Return true if the Graph contains the Edge.

+	public boolean contains( Edge edge )

+	{

+		return _edges.containsKey( edge );

+	}

+

+	// Return the Graph's Node that has the same nick as the supplied Node.

+	public Node get( Node node )

+	{

+		return _nodes.get( node );

+	}

+

+	// Return the Graph's Edge that matched the supplied Edge.

+	public Edge get( Edge edge )

+	{

+		return _edges.get( edge );

+	}

+

+	public String toString()

+	{

+		return "Graph: " + _nodes.size() + " nodes and " + _edges.size() + " edges.";

+	}

+

+	public String toString2()

+	{

+		return "Nodes:\n" + _nodes + "\nEdges:\n" + _edges;

+	}

+

+	// Apply the temporal decay to the Graph.

+	public void decay()

+	{

+		for ( Iterator<Edge> it = _edges.values().iterator(); it.hasNext(); ) {

+			Edge edge = it.next();

+			edge.resetWeight();

+			if ( !edge.isAlive() ) {

+				it.remove();

+			}

+		}

+

+		List<Node> toRemove = null;

+		for ( Node node : _nodes.values() ) {

+			node.age();

+			if ( !node.isAlive() ) {

+				if ( toRemove == null ) {

+					toRemove = new ArrayList<>();

+				}

+				toRemove.add( node );

+			}

+		}

+		if ( toRemove != null ) {

+			for ( Node node : toRemove ) {

+				removeNode( node );

+			}

+		}

+	}

+

+	// Returns the set of all Nodes that have emanating Edges.

+	// This therefore returns all Nodes that will be visible in the drawing.

+	public Set<Node> getConnectedNodes()

+	{

+		Set<Node> connectedNodes = new HashSet<>();

+		for ( Edge edge : _edges.values() ) {

+			connectedNodes.add( edge.getSource() );

+			connectedNodes.add( edge.getTarget() );

+		}

+		return connectedNodes;

+	}

+

+	public Collection<Edge> getEdges()

+	{

+		return _edges.values();

+	}

+

+	// Limit movement values to stop nodes flying into oblivion.

+	private static final double MAX_MOVE = 0.75;

+	private static final double K = 2;

+	private static final double MOVEMENT_SLOWDOWN = 0.001;

+

+	// Applies the spring embedder.

+	public void doLayout( Set<Node> visibleNodes, int iterations )

+	{

+

+		// For performance, copy each set into an array.

+		Node[] nodes = visibleNodes.toArray( new Node[ visibleNodes.size() ] );

+		Edge[] edges = _edges.keySet().toArray( new Edge[ _edges.size() ] );

+

+		if ( nodes.length == 0 )

+			return;

+

+		// For each iteration...

+		for ( int it = 0; it < iterations; it++ ) {

+

+			// Calculate forces acting on nodes due to node-node repulsions...

+			for ( int a = 0; a < nodes.length; a++ ) {

+				final Node nodeA = nodes[a];

+				for ( int b = a + 1; b < nodes.length; b++ ) {

+					final Node nodeB = nodes[b];

+

+					double deltaX = nodeB.getX() - nodeA.getX();

+					double deltaY = nodeB.getY() - nodeA.getY();

+					final double maxDistance = ( nodeA.getDesiredDistance() * nodeB.getDesiredDistance() ) * 0.9;

+

+					double distanceSquared = deltaX * deltaX + deltaY * deltaY;

+

+					if ( distanceSquared > maxDistance * maxDistance )

+						continue;

+

+					if ( distanceSquared < 0.01 ) {

+						deltaX = Math.random() / 10 + 0.1;

+						deltaY = Math.random() / 10 + 0.1;

+						distanceSquared = deltaX * deltaX + deltaY * deltaY;

+					}

+

+					final double distance = FastMath.sqrt( distanceSquared );

+					final double repulsiveForce = ( K * maxDistance / distance ) * 2;

+

+					final double sumDesired = nodeA.getDesiredDistance() + nodeB.getDesiredDistance();

+					// A gets pushed away stronger if B has higher desired distance than A

+					final double rfA = repulsiveForce * ( nodeB.getDesiredDistance() / sumDesired );

+					// Vice versa for B

+					final double rfB = repulsiveForce * ( nodeA.getDesiredDistance() / sumDesired );

+

+					nodeB.addForceX( ( rfB * deltaX / distance ) );

+					nodeB.addForceY( ( rfB * deltaY / distance ) );

+					nodeA.addForceX( - ( rfA * deltaX / distance ) );

+					nodeA.addForceY( - ( rfA * deltaY / distance ) );

+				}

+

+			}

+

+			// Calculate forces acting on nodes due to edge attractions.

+			for ( int e = 0; e < edges.length; e++ ) {

+				final Edge edge = edges[e];

+				final Node nodeA = edge.getSource();

+				final Node nodeB = edge.getTarget();

+

+				final double minDistance = ( nodeA.getDesiredDistance() * nodeB.getDesiredDistance() ) * 1.1;

+

+				final double deltaX = nodeB.getX() - nodeA.getX();

+				final double deltaY = nodeB.getY() - nodeA.getY();

+

+				double distanceSquared = deltaX * deltaX + deltaY * deltaY;

+

+				if ( distanceSquared < minDistance * minDistance )

+					continue;

+

+				double distance = FastMath.sqrt( distanceSquared );

+

+				if ( distance > minDistance * 2 ) {

+					distance = minDistance * 2;

+					distanceSquared = distance * distance;

+				}

+

+				final double attractiveForce = ( distanceSquared / K ) * 2;

+				final double sumDesired = nodeA.getDesiredDistance() + nodeB.getDesiredDistance();

+				// A gets pulled towards B stronger if B has higher desired distance than A

+				final double afA = attractiveForce * ( nodeB.getDesiredDistance() / sumDesired );

+				// Vice versa for B

+				final double afB = attractiveForce * ( nodeA.getDesiredDistance() / sumDesired );

+

+				nodeB.addForceX( -afB * deltaX / distance );

+				nodeB.addForceY( -afB * deltaY / distance );

+				nodeA.addForceX( afA * deltaX / distance );

+				nodeA.addForceY( afA * deltaY / distance );

+

+			}

+

+			// Now move each node to its new location...

+			for ( int a = 0; a < nodes.length; a++ ) {

+				Node node = nodes[a];

+

+				// General weak attraction towards (0|0)

+				if ( node.getDesiredDistance() > 5 ) {

+					node.addForceX( -node.getX() / 500 );

+					node.addForceY( -node.getY() / 500 );

+				}

+

+				double xMovement = MOVEMENT_SLOWDOWN * node.getFX();

+				double yMovement = MOVEMENT_SLOWDOWN * node.getFY();

+

+				if ( xMovement > MAX_MOVE ) {

+					xMovement = MAX_MOVE;

+				}

+				else if ( xMovement < -MAX_MOVE ) {

+					xMovement = -MAX_MOVE;

+				}

+				if ( yMovement > MAX_MOVE ) {

+					yMovement = MAX_MOVE;

+				}

+				else if ( yMovement < -MAX_MOVE ) {

+					yMovement = -MAX_MOVE;

+				}

+

+				node.setX( node.getX() + xMovement );

+				node.setY( node.getY() + yMovement );

+

+				// Reset the forces

+				node.resetForce();

+			}

+

+			// Swap two random nodes if it results in less stress on them

+			Node a = nodes[(int) ( Math.random() * nodes.length )];

+			Node b = nodes[(int) ( Math.random() * nodes.length )];

+			if ( !a.equals( b ) ) {

+				double initialLen = getEdgeLenSum( edges, a, b );

+				a.swapPos( b );

+				double swappedLen = getEdgeLenSum( edges, a, b );

+				if ( swappedLen + 0.5 > initialLen ) {

+					a.swapPos( b ); // Isn't any better, swap back

+				}

+			}

+

+		}

+

+	}

+

+	private double getEdgeLenSum( Edge[] edges, Node a, Node b )

+	{

+		double result = 0;

+		for ( Edge edge : edges ) {

+			if ( edge.hasNode( a ) || edge.hasNode( b ) ) {

+				result += edge.getLengthSquared();

+			}

+		}

+		return result;

+	}

+

+	// Work out the drawing boundaries...

+	public void calcBounds( Set<Node> nodes )

+	{

+

+		minX = Double.POSITIVE_INFINITY;

+		maxX = Double.NEGATIVE_INFINITY;

+		minY = Double.POSITIVE_INFINITY;

+		maxY = Double.NEGATIVE_INFINITY;

+		maxWeight = 0;

+

+		for ( Node node : nodes ) {

+

+			if ( node.getX() > maxX ) {

+				maxX = node.getX();

+			}

+			if ( node.getX() < minX ) {

+				minX = node.getX();

+			}

+			if ( node.getY() > maxY ) {

+				maxY = node.getY();

+			}

+			if ( node.getY() < minY ) {

+				minY = node.getY();

+			}

+		}

+

+		// Increase size if too small.

+		final double minSize = 10;

+		if ( maxX - minX < minSize ) {

+			double midX = ( maxX + minX ) / 2;

+			minX = midX - ( minSize / 2 );

+			maxX = midX + ( minSize / 2 );

+		}

+		if ( maxY - minY < minSize ) {

+			double midY = ( maxY + minY ) / 2;

+			minY = midY - ( minSize / 2 );

+			maxY = midY + ( minSize / 2 );

+		}

+

+		// Work out the maximum weight.

+		for ( Edge edge : _edges.values() ) {

+			if ( edge.getWeight() > maxWeight ) {

+				maxWeight = edge.getWeight();

+			}

+		}

+

+		// Jibble the boundaries to maintain the aspect ratio.

+		double xyRatio = ( ( maxX - minX ) / ( maxY - minY ) ) / ( IMG_X / IMG_Y );

+		if ( xyRatio > 1 ) {

+			// diagram is wider than it is high.

+			double dy = maxY - minY;

+			dy = dy * xyRatio - dy;

+			minY = minY - dy / 2;

+			maxY = maxY + dy / 2;

+		}

+		else if ( xyRatio < 1 ) {

+			// Diagram is higher than it is wide.

+			double dx = maxX - minX;

+			dx = dx / xyRatio - dx;

+			minX = minX - dx / 2;

+			maxX = maxX + dx / 2;

+		}

+

+	}

+

+	private static final Font FONT_64 = new Font( "SansSerif", Font.BOLD, 64 );

+	private static final Font FONT_18 = new Font( "SansSerif", Font.BOLD, 18 );

+	private static final Font FONT_12 = new Font( "SansSerif", Font.PLAIN, 12 );

+	private static final Font FONT_10 = new Font( "SansSerif", Font.PLAIN, 10 );

+	private static final Stroke STROKE_2 = new BasicStroke( 2.0f );

+

+	public void drawImage( Set<Node> nodes, double edgeThreshold )

+	{

+

+		// Now actually draw the thing...

+

+		graphicsContext.setColor( COLOR_BG );

+		graphicsContext.fillRect( 0, 0, IMG_X, IMG_Y );

+

+		graphicsContext.setColor( COLOR_TITLE );

+		graphicsContext.setFont( FONT_64 );

+		graphicsContext.drawString( _label, 20, 80 );

+

+		graphicsContext.setColor( COLOR_TITLE2 );

+		graphicsContext.setFont( FONT_18 );

+		graphicsContext.drawString( _caption, 0, IMG_Y - 5 - 50 );

+		graphicsContext.setFont( FONT_12 );

+		graphicsContext.drawString( "This frame was drawn at " + new Date(), 0, IMG_Y - 5 );

+

+		// Draw all edges...

+		for ( Edge edge : _edges.values() ) {

+			if ( edge.getWeight() < edgeThreshold ) {

+				continue;

+			}

+

+			double weight = edge.getWeight();

+

+			Node nodeA = edge.getSource();

+			Node nodeB = edge.getTarget();

+			int x1 = toImageX( nodeA );

+			int y1 = toImageY( nodeA );

+			int x2 = toImageX( nodeB );

+			int y2 = toImageY( nodeB );

+			graphicsContext.setStroke( new BasicStroke( (float) ( FastMath.log( weight + 1 ) * 0.1 ) + 1 ) );

+			final int alpha = 102 + (int) ( 153 * weight / maxWeight );

+			graphicsContext.setColor( new Color( ( edge.getColor().getRGB() & 0xffffff ) | ( alpha << 24 ), true ) );

+			graphicsContext.drawLine( x1, y1, x2, y2 );

+		}

+

+		// Draw all nodes...

+		graphicsContext.setStroke( STROKE_2 );

+		graphicsContext.setFont( FONT_10 );

+		for ( Node node : nodes ) {

+			final int x = toImageX( node );

+			final int y = toImageY( node );

+			final int nodeRadius = node.getRadius();

+			graphicsContext.setColor( node.getColor() );

+			graphicsContext.fillOval( x - nodeRadius, y - nodeRadius, nodeRadius * 2, nodeRadius * 2 );

+			graphicsContext.setColor( COLOR_EDGE );

+			graphicsContext.drawOval( x - nodeRadius, y - nodeRadius, nodeRadius * 2, nodeRadius * 2 );

+			graphicsContext.setColor( COLOR_LABEL_SHADOW );

+			graphicsContext.drawString( node.toString(), x - ( node.toString().length() * 3 ) + 1, y - nodeRadius - 2 + 1 );

+			graphicsContext.setColor( COLOR_LABEL );

+			graphicsContext.drawString( node.toString(), x - ( node.toString().length() * 3 ), y - nodeRadius - 2 );

+		}

+	}

+

+	private int toImageX( Node node )

+	{

+		return (int) ( ( IMG_X - 50 ) * ( node.getX() - minX ) / ( maxX - minX ) ) + 25;

+	}

+

+	private int toImageY( Node node )

+	{

+		return (int) ( ( IMG_Y - 55 ) * ( node.getY() - minY ) / ( maxY - minY ) ) + 35;

+	}

+

+	public int getFrameCount()

+	{

+		return _frameCount;

+	}

+

+	public String getLabel()

+	{

+		return _label;

+	}

+

+	public void setCaption( String caption )

+	{

+		_caption = caption;

+	}

+

+	public byte[] makeNextImage()

+	{

+		_frameCount++;

+

+		Set<Node> nodes = getConnectedNodes();

+

+		doLayout( nodes, 200 );

+		calcBounds( nodes );

+

+		ByteArrayOutputStream baos = new ByteArrayOutputStream( 100000 );

+

+		try {

+			drawImage( nodes, 0.1 );

+			//ImageIO.write( targetImage, "png", baos );

+			renderer.render( baos );

+

+			writeGraph();

+			return baos.toByteArray();

+		} catch ( Exception e ) {

+			System.out.println( "PieSpy has gone wibbly: " + e );

+			e.printStackTrace();

+		}

+		return null;

+	}

+

+	// Serialize this Graph and write it to a File.

+	public void writeGraph()

+	{

+		/*

+		try {

+			String strippedChannel = _label.toLowerCase().substring( 1 );

+			File dir = new File( config.outputDirectory, strippedChannel );

+			File file = new File( dir, strippedChannel + "-restore.dat" );

+			ObjectOutputStream oos = new ObjectOutputStream( new FileOutputStream( file ) );

+			oos.writeObject( SocialNetworkBot.VERSION );

+			oos.writeObject( this );

+			oos.flush();

+			oos.close();

+		} catch ( Exception e ) {

+			// Do nothing?

+		}

+		*/

+	}

+

+	public Node getNode( String id )

+	{

+		return _nodes.get( new Node( id ) );

+	}

+

+}

diff --git a/src/main/java/org/openslx/graph/Node.java b/src/main/java/org/openslx/graph/Node.java
new file mode 100644
index 0000000..0bf2fab
--- /dev/null
+++ b/src/main/java/org/openslx/graph/Node.java
@@ -0,0 +1,198 @@
+package org.openslx.graph;

+

+import java.awt.Color;

+

+import com.google.gson.annotations.Expose;

+import com.google.gson.annotations.SerializedName;

+

+public class Node implements java.io.Serializable

+{

+	private static final long serialVersionUID = -6997045538537830300L;

+

+	private final String _id;

+	@Expose

+	@SerializedName( "name" )

+	private final String _displayName;

+	@Expose

+	@SerializedName( "distance" )

+	private double _distance = 2;

+	@Expose

+	@SerializedName( "radius" )

+	private int _radius = 2;

+	@Expose

+	@SerializedName( "color" )

+	private String _colorString;

+	@Expose

+	@SerializedName( "x" )

+	private double _x;

+	@Expose

+	@SerializedName( "y" )

+	private double _y;

+	private double _fx;

+	private double _fy;

+	private int _health;

+	private Color _color;

+

+	protected Node( String displayName )

+	{

+		this( displayName, displayName, null );

+	}

+

+	protected Node( String id, String displayName, Node startPos )

+	{

+		_displayName = displayName;

+		_id = id;

+		if ( startPos == null ) {

+			_x = Math.random() * 2;

+			_y = Math.random() * 2;

+		} else {

+			_x = startPos.getX();

+			_y = startPos.getY();

+		}

+		_fx = 0;

+		_fy = 0;

+		_health = getMaxHealth();

+		setColor( Color.BLUE );

+	}

+

+	public void swapPos( Node other )

+	{

+		final double tx = _x, ty = _y;

+		_x = other._x;

+		_y = other._y;

+		other._x = tx;

+		other._y = ty;

+	}

+

+	public void setX( double x )

+	{

+		_x = x;

+	}

+

+	public void setY( double y )

+	{

+		_y = y;

+	}

+

+	public void addForceX( double fx )

+	{

+		_fx += fx;

+	}

+

+	public void addForceY( double fy )

+	{

+		_fy += fy;

+	}

+

+	public void resetForce()

+	{

+		_fx = 0;

+		_fy = 0;

+	}

+

+	public double getX()

+	{

+		return _x;

+	}

+

+	public double getY()

+	{

+		return _y;

+	}

+

+	public double getFX()

+	{

+		return _fx;

+	}

+

+	public double getFY()

+	{

+		return _fy;

+	}

+

+	public String toString()

+	{

+		return _displayName;

+	}

+

+	public String getId()

+	{

+		return _id;

+	}

+

+	public final boolean equals( Object o )

+	{

+		if ( o instanceof Node ) {

+			Node other = (Node)o;

+			return _id.equals( other._id );

+		}

+		return false;

+	}

+

+	public final int hashCode()

+	{

+		return _id.hashCode();

+	}

+

+	public final void activate()

+	{

+		_health = getMaxHealth();

+	}

+

+	public final boolean isAlive()

+	{

+		return _health > 0;

+	}

+

+	public final void age()

+	{

+		_health--;

+	}

+

+	public final Color getColor()

+	{

+		return _color;

+	}

+

+	protected final void setColor( Color color )

+	{

+		_color = color;

+		_colorString = String.format( "#%02X%02X%02X", color.getRed(), color.getGreen(), color.getBlue() );

+	}

+

+	public final int getRadius()

+	{

+		return 5;

+	}

+

+	protected final void setRadius( int radius )

+	{

+		_radius = radius;

+	}

+

+	public int getMaxHealth()

+	{

+		return 1;

+	}

+

+	public final boolean wasActivated()

+	{

+		return _health == getMaxHealth();

+	}

+

+	public final double getDesiredDistance()

+	{

+		return _distance;

+	}

+

+	protected final void setDesiredDistance( double distance )

+	{

+		_distance = distance;

+	}

+

+	public final int getAlpha()

+	{

+		return 63 + ( _health * 192 ) / getMaxHealth();

+	}

+

+}

diff --git a/src/main/java/org/openslx/graph/PngRenderer.java b/src/main/java/org/openslx/graph/PngRenderer.java
new file mode 100644
index 0000000..e51889c
--- /dev/null
+++ b/src/main/java/org/openslx/graph/PngRenderer.java
@@ -0,0 +1,46 @@
+package org.openslx.graph;
+
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferInt;
+import java.awt.image.SinglePixelPackedSampleModel;
+import java.io.OutputStream;
+
+import ar.com.hjg.pngj.ImageInfo;
+import ar.com.hjg.pngj.ImageLineByte;
+import ar.com.hjg.pngj.PngWriter;
+
+public class PngRenderer
+{
+	private final ImageInfo imageInfo;
+	private final SinglePixelPackedSampleModel samplemodel;
+	private final int[] srcImageRawData;
+	private final ImageLineByte line;
+	private final byte[] lineBytes;
+
+	public PngRenderer( BufferedImage image )
+	{
+		imageInfo = new ImageInfo( image.getWidth(), image.getHeight(), 8, false );
+		DataBufferInt db = ( (DataBufferInt)image.getRaster().getDataBuffer() );
+		samplemodel = (SinglePixelPackedSampleModel)image.getSampleModel();
+		line = new ImageLineByte( imageInfo );
+		lineBytes = line.getScanline();
+		srcImageRawData = db.getData();
+	}
+	
+	public void render( OutputStream os )
+	{
+		PngWriter pngWriter = new PngWriter( os, imageInfo );
+		for ( int row = 0; row < imageInfo.rows; row++ ) {
+			int elem = samplemodel.getOffset( 0, row );
+			for ( int col = 0, j = 0; col < imageInfo.cols; col++ ) {
+				int sample = srcImageRawData[elem++];
+				lineBytes[j++] = (byte) ( ( sample & 0xFF0000 ) >> 16 ); // R
+				lineBytes[j++] = (byte) ( ( sample & 0xFF00 ) >> 8 ); // G
+				lineBytes[j++] = (byte) ( sample & 0xFF ); // B
+			}
+			pngWriter.writeRow( line, row );
+		}
+		pngWriter.end();
+	}
+	
+}
diff --git a/src/main/java/org/openslx/graph/ServerNode.java b/src/main/java/org/openslx/graph/ServerNode.java
new file mode 100644
index 0000000..c7604fc
--- /dev/null
+++ b/src/main/java/org/openslx/graph/ServerNode.java
@@ -0,0 +1,23 @@
+package org.openslx.graph;
+
+import java.awt.Color;
+
+public class ServerNode extends Node
+{
+	private static final long serialVersionUID = 1642125227049150051L;
+
+	public ServerNode( String ip )
+	{
+		super( ip, ip, null );
+		setDesiredDistance( 6 );
+		setRadius( 15 );
+		setColor( Color.LIGHT_GRAY );
+	}
+
+	@Override
+	public int getMaxHealth()
+	{
+		return 15;
+	}
+
+}
diff --git a/static/index.html b/static/index.html
new file mode 100644
index 0000000..60053af
--- /dev/null
+++ b/static/index.html
@@ -0,0 +1,7 @@
+<html><body style="padding:0;margin:0;overflow:hidden"><img alt="" src="image.png" id="sasa" style="padding:0;margin:0">
+<script type="text/javascript">
+setInterval(function() {
+		document.getElementById("sasa").src = '/image.png?a=' + Math.random();
+}, 2000);
+</script>
+</body></html>