Metrics: library to measure behavior of critical components
Metrics is a Java library which gives you unparalleled insight into what your code does in production. Developed by Yammer to instrument their JVM-based backend services, Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment. With modules for common libraries like Guice, Jetty, Log4j, Apache HttpClient, Ehcache, Logback and reporting backends like Ganglia and Graphite, Metrics provides you with full-stack visibility.
Homepage:http://metrics.codahale.com/ Getting started and Manual:
http://metrics.codahale.com/getting-started.html Sourcecode:
https://github.com/codahale/metrics
