com.spotify.helios.servicescommon.statistics

Class FastForwardReporter

java.lang.Object

com.spotify.helios.servicescommon.statistics.FastForwardReporter

All Implemented Interfaces:

io.dropwizard.lifecycle.Managed

public class FastForwardReporter
extends Object
implements io.dropwizard.lifecycle.Managed

Sends the metrics in a v3 MetricRegistry to FastForward.

The String "name" of the Metric is sent as the 'what' attribute in the FastForward metric. No translation of the (possibly long, Java classname-ish) name is done. The type of metric is included in the 'metric_type' attribute.

For meters, timers, and histograms, the various component values of the com.codahale.metrics.Metric (m1/m5/m15, p50, p99 etc) are sent as individual Metric instances. The 'stat' attribute is filled out with the corresponding statistic.

Note that not every statistic from Meters/Timers/Histograms is sent to FastForward in order to limit the amount of data being sent and needing to be stored downstream. For Metered instances, only 1m and 5m is sent. For Histograms, just median, p75 and p99 (plus min/max/mean/stddev).

Method Summary

Modifier and Type	Method and Description
static FastForwardReporter	create(com.codahale.metrics.MetricRegistry registry, Optional<com.google.common.net.HostAndPort> address, String metricKey, int intervalSeconds) Create a new FastForwardReporter instance.
static FastForwardReporter	create(com.codahale.metrics.MetricRegistry registry, Optional<com.google.common.net.HostAndPort> address, String metricKey, int intervalSeconds, Supplier<Map<String,String>> additionalAttributes) Overload of create(MetricRegistry, Optional, String, int) which allows for setting additional attributes in each reported metric.
void	start()
void	stop()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static FastForwardReporter create(com.codahale.metrics.MetricRegistry registry,
                                         Optional<com.google.common.net.HostAndPort> address,
                                         String metricKey,
                                         int intervalSeconds)
                                  throws SocketException,
                                         UnknownHostException

Create a new FastForwardReporter instance.

Parameters:

registry - MetricRegistry to report to ffwd

address - Optional HostAndPort to override the defaults that ffwd client uses

metricKey - key to use for all metrics

intervalSeconds - how often to report metrics to ffwd

Throws:

SocketException

UnknownHostException

create

public static FastForwardReporter create(com.codahale.metrics.MetricRegistry registry,
                                         Optional<com.google.common.net.HostAndPort> address,
                                         String metricKey,
                                         int intervalSeconds,
                                         Supplier<Map<String,String>> additionalAttributes)
                                  throws SocketException,
                                         UnknownHostException

Overload of create(MetricRegistry, Optional, String, int) which allows for setting additional attributes in each reported metric.

The additional attributes are modeled as a Supplier to allow for attributes that might change values at runtime.

Throws:

SocketException

UnknownHostException

start

public void start()
           throws Exception

Specified by:

start in interface io.dropwizard.lifecycle.Managed

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface io.dropwizard.lifecycle.Managed

Throws:

Exception