Yammer's Metrics library.
'com.yammer.metrics:metrics-web:2.2.0'
<dependency>
<groupId>com.yammer.metrics</groupId>
<artifactId>metrics-web</artifactId>
<version>2.2.0</version>
</dependency>
<dependency org="com.yammer.metrics" name="metrics-web" rev="2.2.0"/>
"com.yammer.metrics", "metrics-web", "2.2.0"