public  void accumulate(String counterName,
    long add) 
{
   
      Counter counter = null;
      synchronized (counterMap)
      {
         counter = (Counter)counterMap.get(counterName);
         if (counter == null)
         {
            counter = new Counter(counterName);
            counterMap.put(counterName, counter);
         }
      }
      counter.addToCount(add);
}

accumulate a count into a named counter. will initialize the named counter if neccessary.

 public String list() 
{
      DecimalFormat format = new DecimalFormat("####0.0000");
      String retVal = "";
      Iterator keys = counterMap.keySet().iterator();
      while (keys.hasNext())
      {
         String key = (String)keys.next();
         Counter counter = (Counter)counterMap.get(key);
         long total = 0;
         int entries = 0;
         synchronized (counter)
         {//so we dont catch half of it.
            total = counter.getCount();
            entries = counter.getEntries();
         }
         double avg = ((double)total)/((double)entries);
         String descrip = key+": total="+total+" on "+entries+"entries for "+
         "an average of "+format.format(avg)+"< br >\n";
         retVal += descrip;
      }
      return retVal;
}

 protected  void startService() throws Exception 
{
      InitialContext ctx = new InitialContext();
      //bind myself into JNDI, at java:/CounterService
      NonSerializableFactory.bind(JNDI_NAME, this);
      StringRefAddr addr = new StringRefAddr("nns", JNDI_NAME);
      Reference ref = new Reference(this.getClass().getName(), addr, NonSerializableFactory.class.getName(), null);
      ctx.bind(JNDI_NAME, ref);
}

 protected  void stopService() throws Exception 
{
      InitialContext ctx = new InitialContext();
      ctx.unbind(JNDI_NAME);
      NonSerializableFactory.unbind(JNDI_NAME);
}