capture JVM- and application-level metrics for Java applications

 Metrics provides a powerful toolkit of ways to measure the behavior
 of critical components in your Java production environment. It
 includes modules for common libraries like Jetty, Logack, Log4j,
 Apache HttpClient, Ehcache, JDBI, Jersey and reporting backends
 like Ganglia and Graphite. Metrics provides you with full-stack
 visibility into your application.