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;


A triple of moving averages (one-, five-, and fifteen-minute moving average) as needed by Meter. 

Included implementations are:



/**
 * A triple of moving averages (one-, five-, and fifteen-minute
 * moving average) as needed by {@link Meter}.
 * <p>
 * Included implementations are:
 * <ul>
 * <li>{@link ExponentialMovingAverages} exponential decaying average similar to the {@code top} Unix command.
 * <li>{@link SlidingTimeWindowMovingAverages} simple (unweighted) moving average
 * </ul>
 */
public interface MovingAverages {

    
Tick the internal clock of the MovingAverages implementation if needed
(according to the internal ticking interval)

/**
     * Tick the internal clock of the MovingAverages implementation if needed
     * (according to the internal ticking interval)
     */
    void tickIfNecessary();

    
Update all three moving averages with n events having occurred since the last update.

Params:
  • n – 
/**
     * Update all three moving averages with n events having occurred since the last update.
     *
     * @param n
     */
    void update(long n);

    
Returns the one-minute moving average rate

Returns:the one-minute moving average rate
/**
     * Returns the one-minute moving average rate
     *
     * @return the one-minute moving average rate
     */
    double getM1Rate();

    
Returns the five-minute moving average rate

Returns:the five-minute moving average rate
/**
     * Returns the five-minute moving average rate
     *
     * @return the five-minute moving average rate
     */
    double getM5Rate();

    
Returns the fifteen-minute moving average rate

Returns:the fifteen-minute moving average rate
/**
     * Returns the fifteen-minute moving average rate
     *
     * @return the fifteen-minute moving average rate
     */
    double getM15Rate();
}