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 filter used to determine whether or not a metric should be reported, among other things.

/**
 * A filter used to determine whether or not a metric should be reported, among other things.
 */
public interface MetricFilter {
    
Matches all metrics, regardless of type or name.

/**
     * Matches all metrics, regardless of type or name.
     */
    MetricFilter ALL = (name, metric) -> true;

    static MetricFilter startsWith(String prefix) {
        return (name, metric) -> name.startsWith(prefix);
    }

    static MetricFilter endsWith(String suffix) {
        return (name, metric) -> name.endsWith(suffix);
    }

    static MetricFilter contains(String substring) {
        return (name, metric) -> name.contains(substring);
    }

    
Returns true if the metric matches the filter; false otherwise. 
Params:
  • name –   the metric's name
  • metric – the metric
Returns:true if the metric matches the filter
/**
     * Returns {@code true} if the metric matches the filter; {@code false} otherwise.
     *
     * @param name   the metric's name
     * @param metric the metric
     * @return {@code true} if the metric matches the filter
     */
    boolean matches(String name, Metric metric);
}