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 samples values.

/**
 * An object which samples values.
 */
public interface Sampling {
    
Returns a snapshot of the values.

Returns:a snapshot of the values
/**
     * Returns a snapshot of the values.
     *
     * @return a snapshot of the values
     */
    Snapshot getSnapshot();
}