Instrumenting Web Applications

The metrics-webapp module provides a Servlet filter which has meters for status codes, a counter for the number of active requests, and a timer for request duration. You can use it in your web.xml like this:

<filter>
    <filter-name>webappMetricsFilter</filter-name>
    <filter-class>com.yammer.metrics.web.DefaultWebappMetricsFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>webappMetricsFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>