public CountStatisticImpl(String name,
    String description) 
{
        this(name, "count", description);
}

 public CountStatisticImpl(CountStatisticImpl parent,
    String name,
    String description) 
{
        this(name, description);
        this.parent = parent;
}

 public CountStatisticImpl(String name,
    String unit,
    String description) 
{
        super(name, unit, description);
}

 public  void add(long amount) 
{
        if (isEnabled()) {
            counter.addAndGet(amount);
            updateSampleTime();
            if (parent != null) {
                parent.add(amount);
            }
        }
}

 protected  void appendFieldDescription(StringBuffer buffer) 
{
        buffer.append(" count: ");
        buffer.append(Long.toString(counter.get()));
        super.appendFieldDescription(buffer);
}

 public  void decrement() 
{
        if (isEnabled()) {
            counter.decrementAndGet();
            updateSampleTime();
            if (parent != null) {
                parent.decrement();
            }
        }
}

 public long getCount() 
{
        return counter.get();
}

 public double getFrequency() 
{
        double count = counter.get();
        double time = System.currentTimeMillis() - getStartTime();
        return count * 1000.0 / time;
}

 public CountStatisticImpl getParent() 
{
        return parent;
}

 public double getPeriod() 
{
        double count = counter.get();
        if (count == 0) {
            return 0;
        }
        double time = System.currentTimeMillis() - getStartTime();
        return time / (count * 1000.0);
}

 public  void increment() 
{
        if (isEnabled()) {
            counter.incrementAndGet();
            updateSampleTime();
            if (parent != null) {
                parent.increment();
            }
        }
}

 public  void reset() 
{
        if (isDoReset()) {
            super.reset();
            counter.set(0);
        }
}

 public  void setCount(long count) 
{
        if (isEnabled()) {
            counter.set(count);
        }
}

 public  void setParent(CountStatisticImpl parent) 
{
        this.parent = parent;
}

 public  void subtract(long amount) 
{
        if (isEnabled()) {
            counter.addAndGet(-amount);
            updateSampleTime();
            if (parent != null) {
                parent.subtract(amount);
            }
        }
}