io.engineblock.metrics

Class HistoStatsLogger

java.lang.Object

io.engineblock.metrics.CapabilityHook<HdrDeltaHistogramAttachment>

io.engineblock.metrics.HistoStatsLogger

All Implemented Interfaces:

com.codahale.metrics.MetricRegistryListener, Runnable, EventListener

public class HistoStatsLogger
extends CapabilityHook<HdrDeltaHistogramAttachment>
implements Runnable

HistoIntervalLogger runs a separate thread to snapshotAndWrite encoded histograms on a regular interval. It listens to the metrics registry for any new metrics that match the pattern. Any metrics which both match the pattern and which are EncodableHistograms are written the configured logfile at the configured interval.

Nested Class Summary

Nested classes/interfaces inherited from interface com.codahale.metrics.MetricRegistryListener

com.codahale.metrics.MetricRegistryListener.Base

Constructor Summary

Constructors

Constructor and Description
HistoStatsLogger(String sessionName, File file, Pattern pattern, long intervalLength, TimeUnit timeUnit)

Method Summary

Modifier and Type	Method and Description
protected Class<HdrDeltaHistogramAttachment>	getCapabilityClass()
long	getInterval()
boolean	matches(String metricName)
void	onCapableAdded(String name, HdrDeltaHistogramAttachment chainedHistogram)
void	onCapableRemoved(String name, HdrDeltaHistogramAttachment capable)
void	run()
void	startLogging() By convention, it is typical for the logging application to use a comment to indicate the logging application at the head of the log, followed by the log format version, a startLogging time, and a legend (in that order).
String	toString()

Methods inherited from class io.engineblock.metrics.CapabilityHook

onCounterAdded, onCounterRemoved, onGaugeAdded, onGaugeRemoved, onHistogramAdded, onHistogramRemoved, onMeterAdded, onMeterRemoved, onTimerAdded, onTimerRemoved

Methods inherited from class java.lang.Object

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

Constructor Detail

HistoStatsLogger

public HistoStatsLogger(String sessionName,
                        File file,
                        Pattern pattern,
                        long intervalLength,
                        TimeUnit timeUnit)

Method Detail

matches

public boolean matches(String metricName)

startLogging

public void startLogging()

By convention, it is typical for the logging application to use a comment to indicate the logging application at the head of the log, followed by the log format version, a startLogging time, and a legend (in that order).

toString

public String toString()

Overrides:

toString in class Object

getInterval

public long getInterval()

onCapableAdded

public void onCapableAdded(String name,
                           HdrDeltaHistogramAttachment chainedHistogram)

Specified by:

onCapableAdded in class CapabilityHook<HdrDeltaHistogramAttachment>

onCapableRemoved

public void onCapableRemoved(String name,
                             HdrDeltaHistogramAttachment capable)

Specified by:

onCapableRemoved in class CapabilityHook<HdrDeltaHistogramAttachment>

getCapabilityClass

protected Class<HdrDeltaHistogramAttachment> getCapabilityClass()

Specified by:

getCapabilityClass in class CapabilityHook<HdrDeltaHistogramAttachment>

run

public void run()

Specified by:

run in interface Runnable