Dropwizard Metrics Reporter to Hadoop Metrics2

This project is a simple Reporter which enables metrics collected by the Dropwizard Metrics library to be pushed to all configured Hadoop Metrics2 system. This is done by creating a Reporter (Dropwizard) which is also a MetricsSource (Hadoop Metrics2).

This combination allows applications instrumented via Dropwizard Metrics to send their metrics to the Ambari Metrics System.

Most of the other functionality present in Hadoop Metrics2 is already provided by Dropwizard Metrics. I personally prefer instrumenting code with Dropwizard Metrics' API, so this is the perfect middle-ground.

Usage

The Reporter is published in Maven Central and available for use:

<dependency>
  <groupId>com.github.joshelser</groupId>
  <artifactId>dropwizard-metrics-hadoop-metrics2-reporter</artifactId>
  <version>0.1.0</version>
</dependency>

It can be configured in the same fashion as the other available reporters:

final MetricRegistry metrics = new MetricRegistry();

final HadoopMetrics2Reporter metrics2Reporter = HadoopMetrics2Reporter.forRegistry(metrics)
    .build(DefaultMetricsSystem.initialize("Phoenix"), // The application-level name
           "QueryServer", // Component name
           "Phoenix Query Server", // Component description
           "General"); // Name for each metric record

metrics2Reporter.start(30, TimeUnit.SECONDS);

This example will push metrics to Hadoop Metrics2 every 30 seconds.