Help needed to use com.codahale.metrics.servlet.InstrumentedFilter

[arun kumar]

I have done as per the documentation https://dropwizard.github.io/metrics/3.1.0/manual/servlet/

public class TxnMetrics extends InstrumentedFilterContextListener{

    public static final MetricRegistry metrics = new MetricRegistry();

 

 @Override

    protected MetricRegistry getMetricRegistry() {

        System.out.println("INFO : Flow reached getMetricRegistry() ");

         return metrics;

    }

Here is my web.xml

<filter>

    <filter-name>instrumentedFilter</filter-name>

    <filter-class>com.codahale.metrics.servlet.InstrumentedFilter</filter-class>

   </filter>

<filter-mapping>

    <filter-name>instrumentedFilter</filter-name>

    <url-pattern>/*</url-pattern>

</filter-mapping>

</web-app>

My metricsRegistry is not injected into servlet context.

I have configured console reporter, It is not showing while my application gets hit.

Am i missing soming ? Please clarify me. Thanks in advance.

[Thamizh Arasu]

I have also tried similar for ConsoleReporter and it is working fine for me. But I tried this with Jersey REST service. I have written an article on this also http://cloudskol.com/index.php/2016/04/24/restful-java-metering-dropwizard-metrics/

May be helpful to you.

I have already filed an issue in Github regarding MetricServlet is NOT working...

[Jens]

You have to register your TxnMetrics context listener through your web.xml.

<listener>
  <listener-class>com.example.TxnMetrics</listener-class>
</listener>

If you use servlet 3.x you could also annotate the class using @WebListener instead so it gets automatically registered.


-- J.