Initial checkin of meter. This is a WIP.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/branches/pampero@2852 b35dd754-fafc-0310-a699-88a17e54d16e

src/plugins/meter/classes/resources.properties

+initialize.objectname=Loading {0}.
+rrdmanager.createoverride=Using override {0}.
+rrdmanager.archiveadded=Adding archive {0}.
+accumulator.resultnotnumber=Unable to update RRD {2}. Object returned was type {0} with result {1}.
+accumulator.exprresults={0}({1}) result {2}.
+accumulator.getvaluefailed={0} with expression: {1} failed: {2}.
+accumulatorproxy.nullresult=Null result returned from {0} with expression {1}.
\ No newline at end of file

src/plugins/meter/classes/typeoverrides.config

+java.lang\:type\=Threading=org.jivesoftware.messenger.plugin.monitor.ThreadMXBeanSupportInfo
+java.lang\:type\=Memory=org.jivesoftware.messenger.plugin.monitor.MemoryMXBeanSupportInfo
\ No newline at end of file

src/plugins/meter/plugin.xml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<plugin>
+    <class>org.jivesoftware.messenger.plugin.monitor.MonitorPlugin</class>
+    <name>Monitor</name>
+    <description>Provides in depth monitoring of various runtime components in Messenger.</description>
+    <author>Noah Campbell</author>
+    <version>1.0</version>
+    <date>09/01/2005</date>
+    <minServerVersion>2.1.5</minServerVersion>
+
+    <adminconsole>		
+        <tab id="tab-server">
+            <sidebar id="sidebar-server-settings">
+                <item id="monitor-service" name="Core Monitor Service" url="graphsetup.jsp"
+                     description="Click to configure the monitor service." />
+            </sidebar>
+        </tab>
+    </adminconsole>
+
+</plugin>
\ No newline at end of file

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/Accumulator.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.io.IOException;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.management.ObjectName;
+
+import org.jrobin.annotations.Arc;
+import org.jrobin.annotations.Ds;
+import org.jrobin.annotations.Rrd;
+import org.jrobin.core.RrdDb;
+import org.jrobin.core.RrdDbPool;
+import org.jrobin.core.RrdDef;
+import org.jrobin.core.RrdException;
+import org.jrobin.core.Sample;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class Accumulator implements Runnable {
+
+    
+    /** The logger. */
+    final static private Logger logger = Logger.getLogger("ACCUMULATOR", "resources");
+    
+    
+    /** The dbPath. */
+    private final String dbPath;
+    
+    /** The objectName. */
+    private final ObjectName objectName;
+    
+    /** The pool. */
+    private final RrdDbPool pool;
+
+    /**
+     * Construct a new <code>Accumulator</code>.
+     *
+     * @param objectName
+     * @param db
+     */
+    public Accumulator(ObjectName objectName, String db) {
+        this.dbPath = db;
+        this.objectName = objectName;
+        this.pool = RrdDbPool.getInstance();
+    }
+    
+    /** The lastTimestamp. */
+    private long lastTimestamp = Long.MIN_VALUE;
+    
+    /**
+     * @see java.lang.Runnable#run()
+     */
+    public void run() {
+        RrdDb db = null;
+        try {
+            db = pool.requestRrdDb(dbPath);
+        } catch (IOException e1) {
+            logger.log(Level.SEVERE, "accumulator.unabletoopenrrd", new Object[]{dbPath,
+                    e1});
+            return;
+        } catch (RrdException e1) {
+            logger.log(Level.SEVERE, "accumulator.unabletoprocessrrd", new Object[]{dbPath,
+                    e1});
+            return;
+        }
+        try {
+            
+            long timestamp = 0;
+            Sample s = db.createSample();
+            timestamp = s.getTime();
+            
+            
+            AccumulatorHelper helper = (AccumulatorHelper) AccumulatorManager.getAccumulator(this.objectName);
+            Map<String, Number> results = helper.getResults();
+            for(String key : results.keySet()) {
+                s.setValue(key, results.get(key).doubleValue());
+            }
+            
+            if( timestamp == lastTimestamp) {
+                logger.log(Level.INFO,"accumulator.rush", new Object[]{new Date(timestamp * 1000), 
+                        this.objectName, this.dbPath, 
+                        Thread.currentThread().getName(), 
+                        Thread.currentThread().getId()});
+                Thread.sleep(1000);
+            }
+            s.update();
+            lastTimestamp = timestamp;
+            
+        } catch (IOException e) {
+            logger.log(Level.WARNING, "accumulator.ioexception", e);
+        } catch (RrdException e) {
+            logger.log(Level.WARNING, "accumulator.rrdexception", e);
+        } catch (IllegalArgumentException e) {
+            logger.log(Level.WARNING, "accumulator.illegalargumentexceptin", e);
+        } catch (SecurityException e) {
+            logger.log(Level.WARNING, "accumulator.securityexception", e);
+        } catch (InterruptedException e) {
+            logger.log(Level.FINE, "accumulator.interrupted",e.getLocalizedMessage());
+        } catch (UnableToAllocateAccumulator e) {
+            logger.log(Level.WARNING, "accumulator.allocateaccumulatorfailed", e.getLocalizedMessage());
+        } catch (AccumulatorDefinitionNotFoundException e) {
+            logger.log(Level.WARNING, "accumulator.allocatornotfound", e.getLocalizedMessage());
+        } finally {
+            try {
+                pool.release(db);
+            } catch (Exception e) {
+                logger.log(Level.WARNING, "accumulator.releasefailed", e); 
+            }
+        }
+
+    }
+
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/AccumulatorDefinitionNotFoundException.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class AccumulatorDefinitionNotFoundException extends Exception {
+
+    
+    /** The serialVersionUID. */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Construct a new <code>AccululationDefinitionNotFoundException</code>.
+     *
+     */
+    public AccumulatorDefinitionNotFoundException() {
+        super();
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>AccululationDefinitionNotFoundException</code>.
+     *
+     * @param message
+     */
+    public AccumulatorDefinitionNotFoundException(String message) {
+        super(message);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>AccululationDefinitionNotFoundException</code>.
+     *
+     * @param message
+     * @param cause
+     */
+    public AccumulatorDefinitionNotFoundException(String message,
+            Throwable cause) {
+        super(message, cause);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>AccululationDefinitionNotFoundException</code>.
+     *
+     * @param cause
+     */
+    public AccumulatorDefinitionNotFoundException(Throwable cause) {
+        super(cause);
+        // TODO Auto-generated constructor stub
+    }
+
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/AccumulatorHelper.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.util.Map;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+interface AccumulatorHelper {
+
+    
+    /**
+     * <code>getResults</code> returns a map of datasource name and the corresponding
+     * value for the paticular Accumulator.  This is a help method to make the
+     * extract of an arbitrary accumulator more easily assasible.
+     * 
+     * @return map A map of the results.
+     */
+    Map<String, Number> getResults();
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/AccumulatorManager.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.lang.management.ManagementFactory;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+
+import org.apache.commons.jxpath.CompiledExpression;
+import org.apache.commons.jxpath.JXPathContext;
+import org.apache.commons.jxpath.JXPathException;
+import org.jrobin.annotations.Ds;
+import org.jrobin.annotations.Rrd;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class AccumulatorManager {
+ 
+    
+    /** The overrides. */
+    private static Map<ObjectName, Class> overrides = new HashMap<ObjectName, Class>();
+    
+    /**
+     * @param name
+     * @return cls The class that overrides the default MBeanInfo.getClassName
+     */
+    public static Class getOverride(ObjectName name) {
+        return overrides.get(name);
+    }
+    
+    /**
+     * @param objectName
+     * @param cls
+     */
+    public static void registerOverride(ObjectName objectName, Class cls) {
+        overrides.put(objectName, cls);
+    }
+    
+    
+    /**
+     * @param objectName
+     */
+    public static void deregisterOverride(ObjectName objectName) {
+        overrides.remove(objectName);
+    }
+    
+    /**
+     * @author Noah Campbell
+     * @version 1.0
+     */
+    static final class AccumulatorProxy implements InvocationHandler {
+        
+        /** The mbean server. */
+        private final static MBeanServer server = ManagementFactory.getPlatformMBeanServer();
+        /**
+         * Construct a new <code>AccumulatorProxy</code>.
+         *
+         * @param objectName
+         * @param override
+         * @throws AccumulatorDefinitionNotFoundException 
+         */
+        @SuppressWarnings("unchecked")
+        public AccumulatorProxy(ObjectName objectName, Class override) throws AccumulatorDefinitionNotFoundException {
+            this.objectName = objectName;
+            Class cls = null;
+            if(override == null) {
+                try {
+                    Class overrideClass = overrides.get(objectName);
+                    if(overrideClass != null) {
+                        cls = overrideClass;
+                    } else {
+                        // last ditch effort.
+                        cls = Class.forName(server.getMBeanInfo(objectName).getClassName());
+                    }
+                } catch (Exception e) {
+                    throw new AccumulatorDefinitionNotFoundException(e);
+                }
+            } else {
+                cls = override;
+            }            
+            
+            if(cls == null) {
+                throw new AccumulatorDefinitionNotFoundException("Unable to locate class");
+            }
+            
+            if(cls.getAnnotation(Rrd.class) == null) {
+                throw new IllegalArgumentException("No @Rrd specified");
+            }
+            
+            accumulator = java.lang.reflect.Proxy.newProxyInstance(
+                    Thread.currentThread().getContextClassLoader(),
+                    new Class[]{cls, AccumulatorHelper.class},
+                    this);
+            
+            this.mbeanClass = cls;
+            context = JXPathContext.newContext(this.objectName);
+        }
+        
+        /**
+         * Construct a new <code>AccumulatorProxy</code>.
+         *
+         * @param name
+         * @throws Exception
+         */
+        public AccumulatorProxy(ObjectName name) throws Exception {
+            this(name, null);
+        }
+       
+        
+        /** The accumulator. */
+        private final Object accumulator;
+        
+        /** The objectName. */
+        private final ObjectName objectName;
+        
+        /** The mbeanClass. */
+        private final Class mbeanClass;
+        
+        /** The context. */
+        private JXPathContext context = null;
+//        private Map<Method, CompiledExpression> methodCache = new HashMap<Method, CompiledExpression>();
+        
+        
+        /**
+         * @return accumulator The accumulator.
+         */
+        public Object getAccumulator() {
+            return this.accumulator;
+        }
+        
+        /**
+         * @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])
+         */
+        public Object invoke(@SuppressWarnings("unused") Object proxy, Method method, @SuppressWarnings("unused") Object[] args)
+                throws Throwable {
+            
+            if(method.getName().equals("getResults")) {
+                return getResults();
+            }
+            
+            try {
+                Ds ds = method.getAnnotation(Ds.class);
+                return extract(ds);
+            } catch (Exception e) {
+                return 0;
+            }
+        }
+        
+        
+        
+        /** ZERO.  Declared once, used many. */
+        private static final Number ZERO = new Double(0.0d);
+        
+        /**
+         * @param ds The \@Ds to extract.
+         * @return number The value or 0 if the result is not of type Number.
+         */
+        private Number extract(Ds ds) {
+            
+            try {
+                CompiledExpression e = JXPathContext.compile(ds.expr());
+                Object result = e.getValue(context);
+                if(result != null) {
+                    logger.log(Level.INFO, "accumulator.exprresults", new Object[]{ds.name(),
+                            ds.expr(), result});
+                    return (Number) result;
+                } else {
+                    logger.log(Level.WARNING, "accumulatorproxy.nullresult", 
+                            new Object[] { ds.name(), ds.expr() });
+                }
+            } catch (JXPathException e) {
+                logger.log(Level.WARNING, "accumulator.getvaluefailed", 
+                      new Object[]{ds.name(),
+                      ds.expr(),
+                      e.getLocalizedMessage()});
+            } catch (Exception e) {
+                logger.log(Level.WARNING, "accumulatorproxy.unabletoextract", 
+                        new Object[]{ds.name(), ds.expr(), e.getLocalizedMessage()});
+            } 
+            
+            return ZERO;
+        }
+        
+        
+        /**
+         * @return map A map of results.
+         */
+        private Map<String, Number> getResults() {
+            Map<String, Number> results = new HashMap<String, Number>();
+            List<Ds> dss = findDs(this.mbeanClass);
+            for(Ds ds : dss) {
+                results.put(ds.name(), extract(ds));
+            }
+            return results;
+        }
+        
+        
+        
+        /**
+         * @param forName
+         * @return dss List of Ds.
+         */
+        private List<Ds> findDs(Class<?> forName) {
+            List<Ds> anonDs = new ArrayList<Ds>();
+            Method[] methods = forName.getMethods();
+            for(Method m : methods) {
+                Ds ds = m.getAnnotation(Ds.class);
+                if(ds != null) {
+                   if(m.getReturnType().isPrimitive() || m.getReturnType().isAssignableFrom(Number.class)) {
+                        anonDs.add(ds);
+                    } else {
+                        logger.log(Level.WARNING, "accumulatorproxy.invalidreturntype", ds.name());
+                    }
+                }
+            }
+            return anonDs;
+        }
+    }
+    
+    
+    /** The logger. */
+    final static private Logger logger = Logger.getLogger("accumulatormanager",
+            "resources");
+    
+    
+    /** The accumulators. */
+    private static Map<ObjectName, AccumulatorProxy> accumulators = new ConcurrentHashMap<ObjectName, AccumulatorProxy>();
+    
+    
+    /**
+     * @param objectName
+     * @param override
+     * @return accumulator
+     * @throws UnableToAllocateAccumulator 
+     * @throws AccumulatorDefinitionNotFoundException 
+     */
+    @SuppressWarnings("unused")
+    public static Object getAccumulator(ObjectName objectName, Class override) throws UnableToAllocateAccumulator, AccumulatorDefinitionNotFoundException {
+        if(!accumulators.containsKey(objectName)) {
+            accumulators.put(objectName, new AccumulatorProxy(objectName, override));
+        }
+        return accumulators.get(objectName).getAccumulator();
+    }
+    
+    
+    /**
+     * @param objectName
+     * @return accumulator Return the accumulator.
+     * @throws AccumulatorDefinitionNotFoundException 
+     * @throws UnableToAllocateAccumulator 
+     */
+    public static Object getAccumulator(ObjectName objectName) throws UnableToAllocateAccumulator, AccumulatorDefinitionNotFoundException {
+        return getAccumulator(objectName, null);
+    }
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/CompositeDataPropertyHandler.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.util.ArrayList;
+import java.util.Set;
+
+import javax.management.openmbean.CompositeData;
+
+import org.apache.commons.jxpath.DynamicPropertyHandler;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class CompositeDataPropertyHandler implements DynamicPropertyHandler {
+
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#getPropertyNames(java.lang.Object)
+     */
+    public String[] getPropertyNames(Object object) {
+        ArrayList<String> names = new ArrayList<String>(20);
+       if(object instanceof CompositeData) {
+           CompositeData cd = (CompositeData)object;
+           Set keys = cd.getCompositeType().keySet();
+           for(Object key : keys) {
+               names.add((String) key);
+           }
+       }
+       return names.toArray(new String[names.size()]);
+    }
+
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#getProperty(java.lang.Object, java.lang.String)
+     */
+    public Object getProperty(Object object, String propertyName) {
+        if(object instanceof CompositeData) {
+            CompositeData cd = (CompositeData)object;
+            return cd.get(propertyName);
+        }
+        return null;
+    }
+
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#setProperty(java.lang.Object, java.lang.String, java.lang.Object)
+     */
+    public void setProperty(@SuppressWarnings("unused") Object object, 
+            @SuppressWarnings("unused") String propertyName, 
+            @SuppressWarnings("unused") Object value) {
+        throw new UnsupportedOperationException("read-only");
+
+    }
+
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/GraphBuilderBean.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.lang.management.ManagementFactory;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import javax.management.MBeanInfo;
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+
+import org.jrobin.annotations.Rrd;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class GraphBuilderBean {
+    
+    
+    /**
+     * Return all the ObjectNames
+     * 
+     * @return objectnames
+     * @throws Exception 
+     */
+    public List<String> getChartableMBeans() throws Exception {
+        MBeanServer server = ManagementFactory.getPlatformMBeanServer();
+        Set mbeans = server.queryNames(null, null);
+        List<String> results = new ArrayList<String>(mbeans.size());
+        for(Object mbean : mbeans) {
+            ObjectName objectName = ((ObjectName)mbean);
+            MBeanInfo info = server.getMBeanInfo(objectName);
+            Rrd rrd = info.getClass().getAnnotation(Rrd.class);
+            if(rrd != null)
+                results.add(objectName.getCanonicalName());
+        }
+        return results;
+    }
+    
+    public List<String> getStores() {
+        return new ArrayList<String>(RrdManager.listStores().keySet());
+    }
+    
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/GraphServlet.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.imageio.ImageIO;
+import javax.management.ObjectName;
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.beanutils.BeanUtilsBean;
+import org.apache.commons.beanutils.ConvertUtils;
+import org.apache.commons.beanutils.Converter;
+import org.jrobin.core.RrdDb;
+import org.jrobin.core.RrdDbPool;
+import org.jrobin.graph.RrdGraph;
+import org.jrobin.graph.RrdGraphDef;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class GraphServlet extends HttpServlet {
+
+    
+    /** The serialVersionUID. */
+    private static final long serialVersionUID = 1L;
+
+
+    /**
+     * @param request The Request.
+     * @param response The Response.
+     * @throws ServletException Throw if unable to process the request due to a Servlet related problem.
+     * @throws IOException Thrown if unable to process the request due to an IO related problem.
+     * @see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
+     */
+    @SuppressWarnings("unused")
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        response.setContentType("image/png");
+        ServletOutputStream out = response.getOutputStream();
+        response.addHeader("Cache-Control", "no-cache");
+        createPNGGraph(request, out);
+    }
+    
+    
+    /** The colors. */
+    private static final Color[] colors = new Color[]{new Color(102, 204, 204),
+            new Color(102,153,204),
+            new Color(102,102,204),
+            new Color(153,102,204),
+            new Color(102,204,153),
+            new Color( 61,184,184),
+            new Color( 46,138,138),
+            new Color(204,102,204),
+            new Color(102,204,102),
+            new Color(138, 46, 46),
+            new Color(184, 61, 61),
+            new Color(204,102,153),
+            new Color(153,204,102),
+            new Color(204,204,102),
+            new Color(204,153,102),
+            new Color(204,102,102)};
+    
+    /** The converter. */
+    private static final Converter converter = new ColorConverter();
+
+    
+    /**
+     * @param request The servlet request.
+     * @param out The output stream.
+     * @throws IOException Thrown if an IO exception occurs.
+     */
+    private void createPNGGraph(HttpServletRequest request, OutputStream out) throws IOException {
+        int width;
+        int height;
+        
+        try {
+            int w = Integer.parseInt(request.getParameter("width"));
+            width = w <= 800 ? w : 800;
+        } catch (NumberFormatException e) {
+            width = 400;
+        }
+        
+        try {
+            int h = Integer.parseInt(request.getParameter("height"));
+            height = h <= 600 ? h : 600;
+        } catch (NumberFormatException e) {
+            height = 300;
+        }
+        
+        String error = "An error has occured.";
+        
+        try {
+            ConvertUtils.register(converter, Color.class);
+            
+            String store = request.getParameter("store");
+            
+            String objectName = request.getParameter("oname");
+            RrdGraphDef def = new RrdGraphDef();
+            
+            BeanUtilsBean.getInstance().populate(def, request.getParameterMap());
+            
+            String[] lines = request.getParameterValues("lines");
+            for(String line : lines) {
+                String[] field = line.split("::");
+                def.line(field[0], parseColor(field[1]), field[2]);
+            }
+            
+            
+            RrdDbPool pool = RrdDbPool.getInstance();
+            RrdManager manager = RrdManager.listStores().get(store);
+            String filename = manager.getFileName(new ObjectName(objectName));
+            
+            RrdDb db = pool.requestRrdDb(filename);
+            String ref = "input";
+            int count = 0;
+            for(String ds : db.getDsNames()) {
+                String id = ref + count++;
+                def.datasource(id, filename, ds, "AVERAGE");
+                def.line(id, colors[count], ds);
+            }
+            
+            RrdGraph graph = new RrdGraph(def);
+            byte[] output;
+            if(request.getParameter("width") == null) {
+                output = graph.getPNGBytes();
+            } else {
+                output = graph.getPNGBytes(width, height);
+            }
+            
+            /**
+             * write out the byte array to the client.
+             */
+            ByteArrayInputStream bis = new ByteArrayInputStream(output);
+            while(bis.available() > 0) {
+                out.write(bis.read());
+            }
+        } catch (Exception e) {
+            error += " " + e.getLocalizedMessage();
+        } finally {
+            ConvertUtils.deregister(Color.class);
+        }
+        
+        BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+        Graphics2D g2d = (Graphics2D) bufferedImage.getGraphics();
+        g2d.setBackground(Color.white);
+//        g2d.setBackground(new Color(0,0,0,255));
+//        GradientPaint gpaint = new GradientPaint(0, height / 2, Color.white, width, height / 2, Color.gray);
+//        Paint originalPaint = g2d.getPaint();
+//        g2d.setPaint(gpaint);
+        g2d.fillRect(0,0,width,height);
+
+        int errorWidth = g2d.getFontMetrics().stringWidth(error);
+//        g2d.setPaint(originalPaint);
+        
+        g2d.setColor(Color.black);
+        g2d.drawString(error, width / 2 - errorWidth / 2, height / 2);
+        g2d.dispose();
+        ImageIO.write(bufferedImage, "png", out);
+    }
+
+
+    /**
+     * @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig)
+     */
+    @Override
+    public void init(ServletConfig arg0) throws ServletException {
+        // TODO Auto-generated method stub
+        super.init(arg0);
+    }
+
+    
+    /**
+     * @author Noah Campbell
+     * @version 1.0
+     */
+    private static class ColorConverter implements Converter {
+
+        /**
+         * @see org.apache.commons.beanutils.Converter#convert(java.lang.Class, java.lang.Object)
+         */
+        public Object convert(@SuppressWarnings("unused") Class cls, Object input) {
+            if(input instanceof String) {
+                String s = (String)input;
+                return parseColor(s);
+            }
+            
+            return colors[0];
+        }        
+    }
+    
+    
+    /**
+     * Parse a string of format #RRBBGGAA where RR, BB, GG, AA are hex values
+     * ranging between 0 (00) and 255 (FF).  AA is optional and can be excluded
+     * from the #RRBBGG string.
+     * 
+     * @param s
+     * @return color
+     */
+    private static Color parseColor(String s) {
+        try {
+            if( s.startsWith("#") ) {
+                int r = Integer.valueOf(s.substring(1, 3), 16);
+                int g = Integer.valueOf(s.substring(3, 5), 16);
+                int b = Integer.valueOf(s.substring(5, 7), 16);
+                int a = 255;
+                if(s.length() > 7) {
+                    a = Integer.valueOf(s.substring(7, 9), 16);
+                }
+                
+                return new Color(r, g, b, a);
+            }
+        } catch (RuntimeException e) {
+            
+        }
+        return colors[0];
+    }
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/MemoryMXBeanSupportInfo.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import org.jrobin.annotations.Ds;
+import org.jrobin.annotations.Rrd;
+import org.jrobin.annotations.SourceType;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+@Rrd
+public interface MemoryMXBeanSupportInfo {
+
+    
+    
+    
+    /**
+     * @return max The max heap memory usage.
+     */
+    @Ds(name="max", expr="/HeapMemoryUsage/max", type=SourceType.COUNTER)
+    long getMaxHeapMemoryUsage();
+    
+    
+    /**
+     * @return initial The initial heap memory usage.
+     */
+    @Ds(name="init", expr="/HeapMemoryUsage/init")
+    long getInitHeapMemoryUsage();
+    
+    
+    /**
+     * @return used The heap memory usage.
+     */
+    @Ds(name="used", expr="/HeapMemoryUsage/used")
+    long getUsedHeapMemoryUsage();
+    
+    
+    /**
+     * @return commited The commited heap memory usage.
+     */
+    @Ds(name="commited", expr="/HeapMemoryUsage/committed")
+    long getCommittedHeapMemoryUsage();
+    
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/MeterPlugin.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.management.ManagementFactory;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.prefs.Preferences;
+
+import javax.management.InstanceNotFoundException;
+import javax.management.IntrospectionException;
+import javax.management.MBeanServer;
+import javax.management.MalformedObjectNameException;
+import javax.management.ObjectName;
+import javax.management.ReflectionException;
+
+import org.jivesoftware.messenger.container.Plugin;
+import org.jivesoftware.messenger.container.PluginManager;
+import org.jrobin.core.RrdDbPool;
+import org.jrobin.core.RrdException;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class MeterPlugin implements Plugin {
+
+    
+    /** The pluginDirectory. */
+    @SuppressWarnings("unused")
+    private File pluginDirectory;
+    
+    /** The manager. */
+    @SuppressWarnings("unused")
+    private PluginManager manager;
+    
+    /** The logger. */
+    final static private Logger logger = Logger.getLogger("monitorplugin", "resources");
+    
+    
+    /** The server. */
+    private MBeanServer server = ManagementFactory.getPlatformMBeanServer();
+    
+    /** The preferences. */
+    private Preferences preferences;
+    
+    
+    /** The rrdManager. */
+    private RrdManager rrdManager;
+    
+    
+    /** The executors. */
+    ScheduledExecutorService executors = Executors.newScheduledThreadPool(10);
+    
+    /** The pool. */
+    RrdDbPool pool = RrdDbPool.getInstance();
+    
+    /**
+     * @see org.jivesoftware.messenger.container.Plugin#initializePlugin(org.jivesoftware.messenger.container.PluginManager, java.io.File)
+     */
+    public void initializePlugin(PluginManager manager, File pluginDirectory) {
+        this.manager = manager;
+        this.pluginDirectory = pluginDirectory;
+        
+        File store = new File(pluginDirectory, "store");
+        if(!store.exists()) {
+            store.mkdirs();
+        }
+        
+        try {
+            rrdManager = new RrdManager(store.getCanonicalFile(), pool);
+        } catch (Exception e1) {
+            // TODO Auto-generated catch block
+            e1.printStackTrace();
+        }
+        
+        preferences = Preferences.systemNodeForPackage(MeterPlugin.class);
+        String monitoredObjectNames = preferences.get("monitoredObjectNames", "java.lang:type=Threading;java.lang:type=Memory");
+        for(String name : monitoredObjectNames.split("; ?")) {
+            logger.log(Level.FINER, "initialize.objectname", name);
+            try {
+                ObjectName objectName = new ObjectName(name);
+                Accumulator accum = rrdManager.create(objectName, server.getMBeanInfo(objectName));
+               
+                /**
+                 * Schedule the accumulator.
+                 */
+                executors.scheduleAtFixedRate(accum, 0, 300, TimeUnit.SECONDS);
+                
+            } catch (MalformedObjectNameException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (NullPointerException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (InstanceNotFoundException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (RrdException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (IntrospectionException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (ReflectionException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (IOException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } catch (Exception e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+            } 
+        }
+        
+        
+        
+    }
+
+    /**
+     * @see org.jivesoftware.messenger.container.Plugin#destroyPlugin()
+     */
+    public void destroyPlugin() {
+        
+    }
+
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/ObjectNamePropertyHandler.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.lang.management.ManagementFactory;
+import java.util.ArrayList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.management.AttributeNotFoundException;
+import javax.management.InstanceNotFoundException;
+import javax.management.MBeanAttributeInfo;
+import javax.management.MBeanException;
+import javax.management.MBeanInfo;
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+import javax.management.ReflectionException;
+import javax.naming.OperationNotSupportedException;
+
+import org.apache.commons.jxpath.DynamicPropertyHandler;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class ObjectNamePropertyHandler implements DynamicPropertyHandler {
+
+    
+    /** The server. */
+    private static final MBeanServer server = ManagementFactory.getPlatformMBeanServer();
+    
+    /** The logger. */
+    final static private Logger logger = Logger.getLogger(
+            "objectnamepropertyhandler", "resources");
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#getPropertyNames(java.lang.Object)
+     */
+    public String[] getPropertyNames(Object object) {
+        ArrayList<String> list = new ArrayList<String>();
+        try {
+            ObjectName objectName = (ObjectName)object;
+            MBeanInfo info = server.getMBeanInfo(objectName);
+            MBeanAttributeInfo[] attrs = info.getAttributes();
+            
+            for(MBeanAttributeInfo attr : attrs) {
+                list.add(attr.getName());
+            }
+        } catch (Exception e) {
+            logger.log(Level.WARNING, "unabletoevaluatepropertyname", e);
+        }
+        return list.toArray(new String[list.size()]);
+    }
+
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#getProperty(java.lang.Object, java.lang.String)
+     */
+    public Object getProperty(Object object, String propertyName) {
+        try {
+            return server.getAttribute((ObjectName) object, propertyName);
+        } catch (AttributeNotFoundException e) {
+            logger.log(Level.WARNING, "attributenotfound", e);
+        } catch (InstanceNotFoundException e) {
+            logger.log(Level.WARNING, "instancenotfound", e);
+        } catch (MBeanException e) {
+            logger.log(Level.WARNING, "mbeanexception", e);
+        } catch (ReflectionException e) {
+            logger.log(Level.WARNING, "reflectionexception", e);
+        }
+        return null;
+    }
+
+    /**
+     * @see org.apache.commons.jxpath.DynamicPropertyHandler#setProperty(java.lang.Object, java.lang.String, java.lang.Object)
+     */
+    public void setProperty(@SuppressWarnings("unused") Object object, 
+            @SuppressWarnings("unused") String propertyName, 
+            @SuppressWarnings("unused") Object value) {
+        throw new RuntimeException(new OperationNotSupportedException("unable to perform this opertion."));
+    }
+
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/RrdManager.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.management.ManagementFactory;
+import java.lang.reflect.Method;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.management.InstanceAlreadyExistsException;
+import javax.management.MBeanInfo;
+import javax.management.MBeanRegistrationException;
+import javax.management.MBeanServer;
+import javax.management.MBeanServerInvocationHandler;
+import javax.management.MalformedObjectNameException;
+import javax.management.NotCompliantMBeanException;
+import javax.management.ObjectName;
+import javax.management.openmbean.CompositeData;
+import javax.management.relation.InvalidRelationTypeException;
+import javax.management.relation.RelationService;
+import javax.management.relation.RelationServiceMBean;
+import javax.management.relation.RoleInfo;
+
+import org.apache.commons.jxpath.JXPathIntrospector;
+import org.jrobin.annotations.Arc;
+import org.jrobin.annotations.Ds;
+import org.jrobin.annotations.Rrd;
+import org.jrobin.core.RrdDb;
+import org.jrobin.core.RrdDbPool;
+import org.jrobin.core.RrdDef;
+import org.jrobin.core.RrdException;
+
+/**
+ * RrdManager is responsible for managing the RrdPools and the associated files
+ * associated with that pool.
+ * 
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class RrdManager {
+    
+    
+    
+    /** The JROBIN_TYPE_RELATION_SERVICE. */
+    private static final String JROBIN_TYPE_RELATION_SERVICE = "jrobin:type=RelationService";
+
+    /**
+     * @return storeList
+     */
+    public static Map<String, RrdManager> listStores() {
+        return Collections.unmodifiableMap(stores);
+    }
+    
+    /** The stores. */
+    private static Map<String, RrdManager> stores = new HashMap<String, RrdManager>();
+    
+    /** The store. */
+    private final File store;
+    
+    /** The pool. */
+    private final RrdDbPool pool;
+    
+    /** The server. */
+    private static final MBeanServer server = ManagementFactory.getPlatformMBeanServer();
+    
+    /**
+     * Construct a new <code>RrdManager</code>.
+     *
+     * @param store
+     * @param pool
+     * @throws IOException
+     * @throws Exception 
+     */
+    public RrdManager(File store, RrdDbPool pool) throws IOException, Exception {
+        this.store = store;
+        this.pool = pool;
+        
+        if(!stores.containsKey(store.getName())) {
+            stores.put(store.getName(), this);
+        } else {
+            logger.log(Level.WARNING, "rrdmanager.existingstore", store.getName());
+        }
+        
+        startRelationshipService();
+        
+        JXPathIntrospector.registerDynamicClass(ObjectName.class, ObjectNamePropertyHandler.class);
+        JXPathIntrospector.registerDynamicClass(CompositeData.class, CompositeDataPropertyHandler.class);
+        
+        String systemOverride = System.getProperty("org.jivesoftware.messenger.plugin.monitor.overrides");
+        InputStream is = null;
+        if(systemOverride != null && systemOverride.length() > 0) {
+            is = new FileInputStream(systemOverride);
+        } else {
+            is = this.getClass().getClassLoader().getResourceAsStream("typeoverrides.config");
+        }
+        try {
+            new Properties().load(is);
+            
+            Enumeration names = new Properties().propertyNames();
+            for(; names.hasMoreElements(); ) {
+                String name = (String)names.nextElement();
+                try {
+                    AccumulatorManager.registerOverride(new ObjectName(name), Class.forName(new Properties().getProperty(name)));
+                } catch (Exception e) {
+                    logger.log(Level.WARNING, "Unable to register override: {0}", e.getLocalizedMessage());
+                }
+            }
+            
+        } catch (Exception e) {
+            logger.log(Level.WARNING, "rrdmanager.unabletoloadoverride");
+        }
+    }
+
+
+
+    
+    /**
+     * @throws MalformedObjectNameException
+     * @throws InstanceAlreadyExistsException
+     * @throws MBeanRegistrationException
+     * @throws NotCompliantMBeanException
+     * @throws IllegalArgumentException
+     * @throws ClassNotFoundException
+     * @throws InvalidRelationTypeException
+     */
+    private void startRelationshipService() throws MalformedObjectNameException, InstanceAlreadyExistsException, MBeanRegistrationException, NotCompliantMBeanException, IllegalArgumentException, ClassNotFoundException, InvalidRelationTypeException {
+        //      Create the Relation Service MBean
+        ObjectName relSvcName = new ObjectName(JROBIN_TYPE_RELATION_SERVICE);
+        RelationService relSvcObject = new RelationService(true);
+        server.registerMBean(relSvcObject, relSvcName);
+        
+//      Create an MBean proxy for easier access to the Relation Service
+        RelationServiceMBean relSvc = (RelationServiceMBean)
+            MBeanServerInvocationHandler.newProxyInstance(server, relSvcName,
+                                                          RelationServiceMBean.class,
+                                                          false);
+        RoleInfo[] roles = new RoleInfo[] {
+                new RoleInfo("override", Object.class.getName()),
+                new RoleInfo("target", Object.class.getName()),
+                new RoleInfo("archive", String.class.getName())
+        };
+        
+        relSvc.createRelationType("graph", roles);
+        
+    }
+    
+    /** The logger. */
+    final static private Logger logger = Logger.getLogger("rrdmanager", "resources");
+    
+    
+    /**
+     * Returns a file name that is unique for the ObjectName.
+     * 
+     * @param name
+     * @return fileName
+     * @throws IOException 
+     */
+    public String getFileName(ObjectName name) throws IOException {
+        return new File(store, "x" + digest(name.getCanonicalName()) + ".rrd").getCanonicalPath();
+    }
+    
+    /** The key. */
+    private static byte[] key = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x04, 0x03, 0x02, 0x01 };
+    
+    
+    /**
+     * @param buffer
+     * @return digest A Base64 encoded MD5 digest.
+     */
+    private static String digest(String buffer) {
+        try {
+            MessageDigest md5 = MessageDigest.getInstance("MD5");
+            md5.update(buffer.getBytes());
+            return new String(encodeHex(md5.digest(key)));
+        } catch (NoSuchAlgorithmException e) {
+        }
+        return null;
+    }
+    
+    /** 
+     * Used to build output as Hex 
+     */
+    private static final char[] DIGITS = {
+        '0', '1', '2', '3', '4', '5', '6', '7',
+           '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+    };
+    
+    
+    /**
+     * @param data
+     * @return hexValue A char[].
+     */
+    public static char[] encodeHex(byte[] data) {
+
+        int l = data.length;
+
+       char[] out = new char[l << 1];
+    
+       // two characters form the hex value.
+       for (int i = 0, j = 0; i < l; i++) {
+           out[j++] = DIGITS[(0xF0 & data[i]) >>> 4 ];
+           out[j++] = DIGITS[ 0x0F & data[i] ];
+       }
+    
+       return out;
+    }
+    
+    
+    /** The accumulators. */
+    public Map<ObjectName, Accumulator> accumulators = 
+        new HashMap<ObjectName, Accumulator>();
+    
+    
+    /**
+     * Create an accumulator for the Rrd annotation and the ObjectName.
+     * 
+     * @param objectName
+     * @param info 
+     * @return accumulator
+     * @throws Exception
+     */
+    public Accumulator create(ObjectName objectName, MBeanInfo info) throws Exception {
+        
+        if (accumulators.containsKey(objectName)) {
+            return accumulators.get(objectName);
+        } else {
+            if (exists(objectName)) {
+                Accumulator acc = new Accumulator(objectName, getFileName(objectName));
+                accumulators.put(objectName, acc);
+                return acc;
+            } else {
+                Accumulator acc = internalCreate(objectName);
+                accumulators.put(objectName, acc);
+                return acc;
+            }
+        }
+        
+    }
+
+    
+    /**
+     * @param objectName
+     * @return accumulator
+     * @throws Exception 
+     * @throws ClassNotFoundException 
+     */
+    private Accumulator internalCreate(ObjectName objectName) throws ClassNotFoundException, Exception {
+        
+        Class<?> forName = findClass(objectName);
+        
+        Rrd rrd = forName.getAnnotation(Rrd.class);
+        
+        RrdDef def = new RrdDef(getFileName(objectName)); 
+        def.setStep(rrd.step());
+        
+        for(Arc arc : rrd.archives()) {
+            def.addArchive(arc.consolidationFunction().toString(), arc.xff(), arc.steps(), arc.rows());
+            logger.log(Level.FINE, "rrdmanager.archiveadded", arc.consolidationFunction());
+        }
+    
+        List<Ds> anonDs = findDs(forName);
+        for(Ds ds : anonDs) {
+            def.addDatasource(ds.name(), ds.type().toString(), ds.heartbeat(), ds.minValue(), ds.maxValue());
+            logger.log(Level.FINE, "rrdmanager.datasourceadded", new Object[]{ds.expr(), ds.name()});
+        }
+        
+        /**
+         * Store
+         */
+        RrdDb db = pool.requestRrdDb(def);
+        pool.release(db);
+        
+        return new Accumulator(objectName, db.getPath());
+    }
+
+    
+    /**
+     * @param objectName The objectName to build the accumulator against.
+     * @param info MBeanInfo to initialize the accumulator.
+     * @return accumulator The accumulator.
+     * @throws ClassNotFoundException
+     * @throws RrdException
+     * @throws IOException
+     * @throws Exception
+     */
+    private Accumulator internalCreate(ObjectName objectName, String archive) throws ClassNotFoundException, RrdException, IOException, Exception {
+        return new Accumulator(objectName, archive);
+    }
+
+
+
+    /**
+     * @param objectName
+     * @param info
+     * @return cls A Class for the objectName that contains a the graphing information.
+     * @throws ClassNotFoundException
+     * @throws Exception
+     */
+    private Class<?> findClass(ObjectName objectName) throws ClassNotFoundException, Exception {
+        Class<?> forName = Class.forName(server.getMBeanInfo(objectName).getClassName());
+        
+        if(!forName.isAnnotationPresent(Rrd.class)) {
+            forName = AccumulatorManager.getOverride(objectName);
+            logger.log(Level.INFO, "rrdmanager.createoverride", forName.getName());
+        }
+        return forName;
+    }
+
+
+
+    /**
+     * @param forName
+     * @return dss A list of Ds attributes.
+     */
+    private List<Ds> findDs(Class<?> forName) {
+        List<Ds> anonDs = new ArrayList<Ds>();
+        Method[] methods = forName.getMethods();
+        for(Method m : methods) {
+            Ds ds = m.getAnnotation(Ds.class);
+            if(ds != null) {
+                anonDs.add(ds);
+            }
+        }
+        return anonDs;
+    }
+
+
+    
+    /**
+     * @param objectName
+     * @return boolean Does the rrd exist or not.
+     */
+    public boolean exists(ObjectName objectName) {
+        
+        try {
+            return new File(getFileName(objectName)).exists();
+        } catch (IOException e) {
+           logger.log(Level.SEVERE, "rrdmanager.existsfailed");
+           return false;
+        }
+    }
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/ThreadMXBeanSupportInfo.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+import org.jrobin.annotations.Ds;
+import org.jrobin.annotations.Rrd;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+@Rrd
+public interface ThreadMXBeanSupportInfo {
+        
+    
+    /**
+     * @return time The current thread cpu time.
+     */
+    @Ds(name="cputime", expr="/CurrentThreadCpuTime" )
+    long getCurrentThreadCpuTime();
+    
+    
+    /**
+     * @return count The current thread count.
+     */
+    @Ds(name="threadCount", expr="/ThreadCount")
+    long getThreadCount();
+    
+    
+}

src/plugins/meter/src/java/org/jivesoftware/messenger/plugin/meter/UnableToAllocateAccumulator.java

+/**
+ * 
+ */
+package org.jivesoftware.messenger.plugin.meter;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public class UnableToAllocateAccumulator extends Exception {
+
+    
+    /** The serialVersionUID. */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Construct a new <code>UnableToAllocateAccumulator</code>.
+     *
+     */
+    public UnableToAllocateAccumulator() {
+        super();
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>UnableToAllocateAccumulator</code>.
+     *
+     * @param message
+     * @param cause
+     */
+    public UnableToAllocateAccumulator(String message, Throwable cause) {
+        super(message, cause);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>UnableToAllocateAccumulator</code>.
+     *
+     * @param message
+     */
+    public UnableToAllocateAccumulator(String message) {
+        super(message);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * Construct a new <code>UnableToAllocateAccumulator</code>.
+     *
+     * @param cause
+     */
+    public UnableToAllocateAccumulator(Throwable cause) {
+        super(cause);
+        // TODO Auto-generated constructor stub
+    }
+
+}

src/plugins/meter/src/java/org/jrobin/annotations/Arc.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+@Target(value=ElementType.TYPE)
+@Retention(value=RetentionPolicy.RUNTIME)
+public @interface Arc {
+    /**
+     * The data is also consolidated with the consolidation function (CF) of the 
+     * archive. The following consolidation functions are defined: 
+     * AVERAGE, MIN, MAX, LAST.
+     * @return confun The standard consolidation functions (AVERAGE, MIN, MAX, LAST) for the archive.
+     */
+    ConsolidationFunction consolidationFunction();
+    
+    /**
+     * xff The xfiles factor defines what part of a consolidation interval may 
+     * be made up from *UNKNOWN* data while the consolidated value is still 
+     * regarded as known.
+     *  
+     * @return xff
+     */
+    double xff();
+    
+    /**
+     * steps defines how many of these primary data points are used to build a 
+     * consolidated data point which then goes into the archive.
+     * @return steps
+     */
+    int steps();
+    
+    /**
+     * rows defines how many generations of data values are kept in an RRA.
+     * @return rows
+     */
+    int rows();
+}

src/plugins/meter/src/java/org/jrobin/annotations/ConsolidationFunction.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public enum ConsolidationFunction {
+    
+    /** The AVERAGE. */
+    AVERAGE, 
+    
+    /** The MIN. */
+    MIN, 
+    
+    /** The MAX. */
+    MAX, 
+    
+    /** The LAST. */
+    LAST
+}

src/plugins/meter/src/java/org/jrobin/annotations/Ds.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+@Retention(value=RetentionPolicy.RUNTIME)
+@Target(value={ElementType.METHOD})
+public @interface Ds {
+    /**
+     * Name is the name you will use to reference this particular data source 
+     * from an RRD. A ds-name must be 1 to 19 characters long in the 
+     * characters [a-zA-Z0-9_].
+     * @return name
+     */
+    String name();
+    
+    /**
+     * <em>type</em> defines the Data Source Type. See the section on
+     * ``How to Measure'' below for further insight. The Datasource Type must
+     * be one of the following:</p>
+     * <dl>
+     * 
+     * @return sourceType
+     */
+    SourceType type() default SourceType.COUNTER;
+    
+    /**
+     * heartbeat defines the maximum number of seconds that may pass between two 
+     * updates of this data source before the value of the data source is 
+     * assumed to be *UNKNOWN*.
+     */
+    long heartbeat() default 600;
+    
+    /**
+     * min and max are optional entries defining the expected range of the data 
+     * supplied by this data source. If min and/or max are defined, any value 
+     * outside the defined range will be regarded as *UNKNOWN*. If you do not 
+     * know or care about min and max, set them to U for unknown. 
+     * Note that min and max always refer to the processed values of the DS. 
+     * For a traffic-COUNTER type DS this would be the max and min data-rate 
+     * expected from the device.
+     */    
+    double minValue() default Double.MIN_VALUE;
+    /**
+     * @see #minValue()
+     * @return maxValue
+     */
+    double maxValue() default Double.MAX_VALUE;
+    
+    /**
+     * A XPath expression that defines how the data is collected from the object
+     * model.  This is bean notion with a few exceptions.  The attributes from
+     * the mbean server are upper case for the first character (as opposed to 
+     * first letter lower case.  Composite data are the exact string value as
+     * they are stored.
+     * 
+     * For example: MBeanAttribute/composite/foo/bar/baz would lookup the attribute
+     * named MBeanAttribute (invoking the getAttribute on the server).  Composite
+     * would call CompositeData.getField(<i>literal</i>).  If the field is an object
+     * than the object graph is traversed with the rules defined in JXPath.
+     * 
+     * The result should always be a number (short, long, double, float and the
+     * appropriate Object types).  If it's not a number, 0 is returned.
+     * 
+     * If no expression is given, then it's assumed that the name of the data source
+     * is the attribute on the ObjectName that it references.
+     * 
+     * @see "JXPath"
+     * @return expression
+     */
+    String expr() default "";
+}

src/plugins/meter/src/java/org/jrobin/annotations/None.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+/**
+ * Marker interface for Rrd#override()
+ * 
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public interface None {
+
+}

src/plugins/meter/src/java/org/jrobin/annotations/Rrd.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+@Target(value=ElementType.TYPE)
+@Retention(value=RetentionPolicy.RUNTIME)
+public @interface Rrd {
+    /**
+     * RRD gets fed samples at arbitrary times. From these it builds Primary 
+     * Data Points (PDPs) at exact times every ``step'' interval. The PDPs are 
+     * then accumulated into RRAs.
+     * 
+     * <b>Note:</b> Changing this value from its default of 300 will impact the
+     * storage of the default archives.
+     * 
+     * @return steps Number of seconds between expected reads. 
+     */
+    long step() default 300;
+    
+    /**
+     * The class that this Rrd overrides.
+     * @return cls
+     */
+    Class override() default None.class;
+    
+    /**
+     * Archives to be associated with this rrd, beyond the Ds defined.
+     * @return archives The standard type of archives.
+     * 
+     * This will be explained later on. The time in-between samples is 300 
+     * seconds, a good starting point, which is the same as five minutes.
+     *
+     * 1 sample "averaged" stays 1 period of 5 minutes
+     * 6 samples averaged become one average on 30 minutes
+     * 24 samples averaged become one average on 2 hours
+     * 288 samples averaged become one average on 1 day
+     * 
+     * <b>Note:</b> Changing the default step will have an impact on the archives that are 
+     * created.
+     */
+    Arc[] archives() default {@Arc(consolidationFunction=ConsolidationFunction.AVERAGE, xff=0.5, steps=1, rows=600),
+        @Arc(consolidationFunction=ConsolidationFunction.AVERAGE, xff=0.5, steps=5, rows=700),
+        @Arc(consolidationFunction=ConsolidationFunction.AVERAGE, xff=0.5, steps=24, rows=775),
+        @Arc(consolidationFunction=ConsolidationFunction.AVERAGE, xff=0.5, steps=288, rows=797),
+        @Arc(consolidationFunction=ConsolidationFunction.MAX, xff=0.5, steps=1, rows=600),
+        @Arc(consolidationFunction=ConsolidationFunction.MAX, xff=0.5, steps=5, rows=700),
+        @Arc(consolidationFunction=ConsolidationFunction.MAX, xff=0.5, steps=24, rows=775),
+        @Arc(consolidationFunction=ConsolidationFunction.MAX, xff=0.5, steps=288, rows=797),
+        @Arc(consolidationFunction=ConsolidationFunction.MIN, xff=0.5, steps=1, rows=600),
+        @Arc(consolidationFunction=ConsolidationFunction.MIN, xff=0.5, steps=5, rows=700),
+        @Arc(consolidationFunction=ConsolidationFunction.MIN, xff=0.5, steps=24, rows=775),
+        @Arc(consolidationFunction=ConsolidationFunction.MIN, xff=0.5, steps=288, rows=797)};
+}

src/plugins/meter/src/java/org/jrobin/annotations/SourceType.java

+/**
+ * 
+ */
+package org.jrobin.annotations;
+
+/**
+ * @author Noah Campbell
+ * @version 1.0
+ */
+public enum SourceType {
+    
+
+   /**
+    *  </dd><dt><strong><a name="item_COUNTER"><strong>COUNTER</strong></a></strong><br>
+    * </dt><dd>is for continuous incrementing counters like the InOctets counter in a router. The <strong>COUNTER</strong>
+    * data source assumes that the counter never decreases, except when a
+    * counter overflows. The update function takes the overflow into account.
+    * The counter is stored as a per-second rate. When the counter overflows,
+    * RRDtool checks if the overflow happened at the 32bit or 64bit border
+    * and acts accordingly by adding an appropriate value to the result. <p></p>
+    */ 
+    COUNTER, 
+    
+    /**
+     * <dt><strong><a name="item_GAUGE"><strong>GAUGE</strong></a></strong><br>
+     * </dt><dd>is for things like temperatures or number of people in a room or value of a RedHat share. 
+     * <p></p>
+     */
+    GAUGE, 
+    
+    /** 
+     * </dd><dt><strong><a name="item_DERIVE"><strong>DERIVE</strong></a></strong><br>
+     * </dt><dd>will store the derivative of the line going from the last to
+     * the current value of the data source. This can be useful for gauges,
+     * for example, to measure the rate of people entering or leaving a room.
+     * Internally, derive works exaclty like COUNTER but without overflow
+     * checks. So if your counter does not reset at 32 or 64 bit you might
+     * want to use DERIVE and combine it with a MIN value of 0. <p></p>
+     */
+     DERIVE, 
+    
+     /** 
+      * </dd><dt><strong><a name="item_ABSOLUTE"><strong>ABSOLUTE</strong></a></strong><br>
+      * </dt><dd>is for counters which get reset upon reading. This is used for
+      * fast counters which tend to overflow. So instead of reading them
+      * normally you reset them after every read to make sure you have a
+      * maximal time available before the next overflow. Another usage is for
+      * things you count like number of messages since the last update.
+      */
+    ABSOLUTE;
+}

src/plugins/meter/src/web/WEB-INF/web-custom.xml

+<?xml version='1.0' encoding='ISO-8859-1'?>
+<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
+<web-app>
+    <!-- Servlets -->
+    <servlet>
+    	<display>JRobin Graphing Servlet</display>
+        <servlet-name>GraphServlet</servlet-name>
+        <servlet-class>org.jivesoftware.messenger.plugin.monitor.GraphServlet</servlet-class>
+        <load-on-startup>2</load-on-startup>
+    </servlet>
+    
+   <servlet>
+    <servlet-name>dwr-invoker</servlet-name>
+    <display-name>DWR Servlet</display-name>
+    <description>Direct Web Remoter Servlet</description>
+    <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
+    <init-param>
+      <param-name>debug</param-name>
+      <param-value>true</param-value>
+    </init-param>
+    <load-on-startup>1</load-on-startup>
+  </servlet>
+  
+	<!-- Servlet mappings -->
+	  <servlet-mapping>
+	    <servlet-name>dwr-invoker</servlet-name>
+	    <url-pattern>/dwr/*</url-pattern>
+	  </servlet-mapping>
+		
+	
+	<servlet-mapping>
+	    <servlet-name>GraphServlet</servlet-name>
+	    <url-pattern>/chart.pngx</url-pattern>
+	</servlet-mapping>
+
+</web-app>

src/plugins/meter/src/web/graphsetup.jsp

+<%@ page import="java.util.*,
+                 org.jivesoftware.admin.*,
+                 org.jivesoftware.messenger.XMPPServer,
+                 org.jivesoftware.util.*"
+    errorPage="error.jsp"
+%>
+
+<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c" %>
+<%@ taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt" %>
+
+<%-- Define Administration Bean --%>
+<jsp:useBean id="admin" class="org.jivesoftware.util.WebManager"  />
+<c:set var="admin" value="${admin.manager}" />
+<% admin.init(request, response, session, application, out ); %>
+
+
+<jsp:useBean id="pageinfo" scope="request" class="org.jivesoftware.admin.AdminPageBean" />
+<%
+    String title = "Core Monitor Graphing Properties";
+    pageinfo.setTitle(title);
+    pageinfo.getBreadcrumbs().add(new AdminPageBean.Breadcrumb(LocaleUtils.getLocalizedString("global.main"), "../../index.jsp"));
+    pageinfo.getBreadcrumbs().add(new AdminPageBean.Breadcrumb(title, "graphsetup.jsp"));
+    pageinfo.setPageID("monitor-service");
+%>
+<jsp:include page="top.jsp" flush="true" />
+<jsp:include page="title.jsp" flush="true" />
+
+<jsp:useBean id="graphBuilder" scope="session" class="org.jivesoftware.messenger.plugin.monitor.GraphBuilderBean"/>
+
+<div style="width:100%;border:1px solid black;">
+
+	<img id="img" src="/plugins/monitor/chart?store=store">
+
+<div>
+
+
+<link rel="stylesheet" type="text/css" href="http://www.jivesoftware.org/forums/style.jsp">
+
+<style>
+
+table {border-collapse:collapse;}
+table td {padding:3px;}
+caption {font-weight:bold;background:#5500FF;}
+fieldset {margin:5px;width:750px;}
+table {width:100%;}
+
+input[type="button"] {width:65px;}
+td input[type="button"] {text-align:right;}
+input[type="text"] {border:black solid 1px;}
+
+select {border:black solid 1px;}
+tr.hover {background: gray;}
+td.action {text-align:right;}
+td>input[type="text"] {width:100%;}
+td>select {width:95%;}
+
+tfoot td {text-align:center;}
+tfoot>tr:hover {width:65px;background:#AAAAAA;}
+tfoot {visibility:hidden;}
+
+thead td {font-weight:bold;}
+
+
+</style>
+
+<script type="text/javascript" src="dwr/utils.js"></script>
+<script type="text/javascript" src="dwr/engine.js"></script>
+    
+<script>
+
+function toggle(id) {
+	var style = id.style.visibility;
+	if(style == 'hidden' || style == '') 
+		id.style.visibility='visible';
+	else
+		id.style.visibility='hidden';
+}
+
+</script>
+
+<form ACTION="graphsetup.jsp" method="GET">
+
+
+
+<fieldset>
+
+<table width="100%" border=0>
+<tbody>
+<tr>
+	<td>ObjectName</td>
+	<td><select>
+	<c:forEach var="mbean" items="${graphBuilder.chartableMBeans}">
+		<option><c:out value="${mbean}" /></option>
+	</c:forEach>
+	</select></td>
+	<td>Store</td>
+	<td><select><c:forEach var="store" items="${graphBuilder.stores}">
+	<option><c:out value="${store}"/></option>
+	</c:forEach></select></td>
+</tr>
+</tbody>
+</table>
+
+</fieldset>
+
+
+<fieldset>
+<table width="100%">
+<caption>Datasources</caption>
+<thead>
+<tr>
+<td>Graph Item</td>
+<td>DataSource</td>
+<td>Name</td>
+<td>CF Type</td>
+<td class="action"><input type="button" value="add"></td>
+</tr>
+</thead>
+<tbody>
+<!-- sample data -->
+<tr>
+	<td>input0</td>
+	<td>somefilename.rrd</td>
+	<td>in</td>
+	<td>AVERAGE</td>
+	<td class="action"><input type="button" value="edit"></td>
+<tr>
+
+<!-- sample expr -->
+<tr>
+	<td>input1</td>
+	<td colspan="3">in,8,+</td>
+	<td class="action"><input type="button" value="edit"></td>
+</tr>
+
+</tbody>
+<tfoot>
+<tr>
+<td><input type="text" name="name"></td>
+<td><input type="text" name="name"></td>
+<td><input type="text" name="name"></td>
+<td><select name="confunc">
+	<option>AVERAGE</option>
+	<option>MAX</option>
+	<option>MIN</option>
+	<option>LAST</option>
+	</select>
+</td>
+<td class="action"><input type="button" value="update"></td>
+</tr>
+</tfoot>
+</table>
+
+</fieldset>
+
+
+<fieldset>
+
+<table width="100%">
+<caption>Graph Elements</caption>
+<thead>
+<tr>
+	<td>Type</td>
+	<td>Datasource</td>
+	<td>Color</td>
+	<td>Title</td>
+	<td class="action"><input type="button" value="add"></td>
+</tr>
+</thead>
+
+<tbody>
+<!-- sample graph element -->
+<tr>
+	<td>LINE</td>
+	<td>in8</td>
+	<td>#AA333344</td>
+	<td>Input</td>
+	<td class="action"><input type="button" value="edit"></td>
+</tr>
+
+</tr>
+</tbody>
+<tfoot>
+<tr>
+<td><select name="type">
+	<option>LINE</option>
+	<option>AREA</option>
+	<option>STACK</option>
+	<option>HRULE</option>
+	<option>VRULE</option>
+	</select>
+</td>
+<td><input type="text" value=""></td>
+<td><input type="text" value=""></td>
+<td><input type="text" value=""></td>
+<td class="action"><input type="button" value="edit"></td>
+</tr>
+</tfoot>
+</table>
+</fieldset>
+
+<fieldset>
+<table width="100%">
+<caption>Legend</caption>
+<thead>
+<tr>
+	<td>Name</td>
+	<td>Consol Function</td>
+	<td>Description</td>
+	<td class="action"><input type="button" value="add" onClick="toggle(graphedit)"></td>
+</tr>
+</tr>
+</thead>
+<tbody>
+<tr>
+	<td>in8</td>
+	<td>AVERAGE</td>
+	<td>avgTotal=%.2lf %sbits/sec</td>
+	<td class="action"><input type="button" value="edit"></td>
+</tr>
+</tbody>
+<tfoot id="graphedit">
+<tr>
+	<td><input type="text"></td>
+	<td><select name="confunc">
+	<option>AVERAGE</option>
+	<option>MAX</option>
+	<option>MIN</option>
+	<option>LAST</option>
+	</select>
+	</td>
+	<td><input type="text"></td>
+	<td class="action"><input value="update" type="button"></td>
+</tr>
+</tfoot>
+</table
+</fieldset>
+
+</form>
\ No newline at end of file