The Implementation

package com.mytest;

import java.util.logging.Level;
import java.util.logging.Logger;

import javax.management.openmbean.
                       CompositeDataSupport;
import javax.management.openmbean.
                       CompositeType;
import javax.management.openmbean.
                       OpenDataException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import javax.management.openmbean.TabularData;
import javax.management.openmbean.
                       TabularDataSupport;
import javax.management.openmbean.TabularType;

import curam.util.jmx.CuramMBeanAbstract;

public class MyStats extends CuramMBeanAbstract
      implements MyStatsMBean {
private static final Logger log = Logger
     .getLogger(MyStats.class.getName());

private static final OpenType[] kItemTypes
                        = new OpenType[] {
  SimpleType.STRING,
  SimpleType.LONG,
};

private static final String[] kItemNames
                = new String[] {
   "Item",
   "Execution time(ms)"};

private static final String[] kItemDescriptions
               = new String[] {
   "The name of the item",
   "The execution time in milliseconds"};

private static TabularType stTabularType;

private static CompositeType stRowType;

private static MyStats instance;

static {
  try {
    stRowType = new CompositeType(
        "MyStatsType", "My statistics",
         kItemNames, kItemDescriptions, kItemTypes);
    stTabularType = new TabularType(
        "MyStats", "My statistics",
        stRowType, new String[] { kItemNames[0]});
  } catch (Exception e) {
    log.log(Level.SEVERE,
         "Failed to create the open types.", e);
  }
}

public MyStats() {
  super();
  instance = this;
}

/* (non-Javadoc)
 * @see com.mytest.MyStatsMBean#getStats()
 */
public TabularData getStats()
      throws OpenDataException {
  if (stRowType == null
           || stTabularType == null) {
    return null;
  }
  TabularDataSupport sup = new TabularDataSupport(
           stTabularType);

  // sample stats
  Object[] values = new Object[2];
  // ...
  // get the values
  // ...
  CompositeDataSupport cd =
                        new CompositeDataSupport(
    stRowType, kItemNames, values);
  sup.put(cd);
  return sup;
}

/**
 * This method is invoked from instrumented code
 * to update the statistics for
 * <code>item</code>.
 * @param item the item to update statistics for
 * @param executionTime the execution time
 */
public static void updateStats(
           String item, long executionTime) {
  if(instance != null) {
    instance._updateStats(item, executionTime);
  }
}

/**
 * This method is invoked by the JMX infrastructure when
 * a request is made to reset the JMX statistics.
 * @see com.mytest.MyStatsMBean#reset()
 */
public void reset() {
 // ...
 // reset the statistics
 //...
}

private void _updateStats(String item, long executionTime) {
  // ...
  // update the items average execution time
  // ...
}
}