http://metrics.dropwizard.io/metrics-core: Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.
  • Coda Hale
  • Ryan Tenney
  • Artem Prigoda 
package com.codahale.metrics;


An object which maintains mean and moving average rates.

/**
 * An object which maintains mean and moving average rates.
 */
public interface Metered extends Metric, Counting {
    
Returns the number of events which have been marked.

Returns:the number of events which have been marked
/**
     * Returns the number of events which have been marked.
     *
     * @return the number of events which have been marked
     */
    @Override
    long getCount();

    
Returns the fifteen-minute moving average rate at which events have
occurred since the meter was created.

Returns:the fifteen-minute moving average rate at which events have
occurred since the meter was created
/**
     * Returns the fifteen-minute moving average rate at which events have
     * occurred since the meter was created.
     *
     * @return the fifteen-minute moving average rate at which events have
     * occurred since the meter was created
     */
    double getFifteenMinuteRate();

    
Returns the five-minute moving average rate at which events have
occurred since the meter was created.

Returns:the five-minute moving average rate at which events have
occurred since the meter was created
/**
     * Returns the five-minute moving average rate at which events have
     * occurred since the meter was created.
     *
     * @return the five-minute moving average rate at which events have
     * occurred since the meter was created
     */
    double getFiveMinuteRate();

    
Returns the mean rate at which events have occurred since the meter was created.

Returns:the mean rate at which events have occurred since the meter was created
/**
     * Returns the mean rate at which events have occurred since the meter was created.
     *
     * @return the mean rate at which events have occurred since the meter was created
     */
    double getMeanRate();

    
Returns the one-minute moving average rate at which events have
occurred since the meter was created.

Returns:the one-minute moving average rate at which events have
occurred since the meter was created
/**
     * Returns the one-minute moving average rate at which events have
     * occurred since the meter was created.
     *
     * @return the one-minute moving average rate at which events have
     * occurred since the meter was created
     */
    double getOneMinuteRate();
}