org.apache.calcite.avatica.metrics.dropwizard

Class DropwizardMetricsSystem

java.lang.Object

org.apache.calcite.avatica.metrics.dropwizard.DropwizardMetricsSystem

All Implemented Interfaces:

MetricsSystem

public class DropwizardMetricsSystem
extends Object
implements MetricsSystem

Dropwizard Metrics implementation of MetricsSystem.

Constructor Summary

Constructors

Constructor and Description
DropwizardMetricsSystem(com.codahale.metrics.MetricRegistry registry)

Method Summary

Modifier and Type	Method and Description
Counter	getCounter(String name) Get or construct a Counter used to track a mutable number.
Histogram	getHistogram(String name) Get or construct a Histogram used to measure a distribution of values.
Meter	getMeter(String name) Get or construct a Meter used to measure durations and report distributions (a combination of a Timer and a Histogram.
Timer	getTimer(String name) Get or construct a Timer used to measure durations and report rates.
<T> void	register(String name, Gauge<T> gauge) Register a Gauge.

Methods inherited from class java.lang.Object

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

Constructor Detail

DropwizardMetricsSystem

public DropwizardMetricsSystem(com.codahale.metrics.MetricRegistry registry)

Method Detail

getTimer

public Timer getTimer(String name)

Description copied from interface: MetricsSystem

Get or construct a Timer used to measure durations and report rates.

Specified by:

getTimer in interface MetricsSystem

Parameters:

name - The name of the Timer.

Returns:

An instance of Timer.

getHistogram

public Histogram getHistogram(String name)

Description copied from interface: MetricsSystem

Get or construct a Histogram used to measure a distribution of values.

Specified by:

getHistogram in interface MetricsSystem

Parameters:

name - The name of the Histogram.

Returns:

An instance of Histogram.

getMeter

public Meter getMeter(String name)

Description copied from interface: MetricsSystem

Get or construct a Meter used to measure durations and report distributions (a combination of a Timer and a Histogram.

Specified by:

getMeter in interface MetricsSystem

Parameters:

name - The name of the Meter.

Returns:

An instance of Meter.

getCounter

public Counter getCounter(String name)

Description copied from interface: MetricsSystem

Get or construct a Counter used to track a mutable number.

Specified by:

getCounter in interface MetricsSystem

Parameters:

name - The name of the Counter

Returns:

An instance of Counter.

register

public <T> void register(String name,
                         Gauge<T> gauge)

Description copied from interface: MetricsSystem

Register a Gauge. The Gauge will be invoked at a period defined by the implementation of MetricsSystem.

Specified by:

register in interface MetricsSystem

Type Parameters:

T - The type of the Gauge.

Parameters:

name - The name of the Gauge.

gauge - A callback to compute the current value.