org.apache.iotdb.metrics.impl

Class DoNothingMetricManager

java.lang.Object

org.apache.iotdb.metrics.impl.DoNothingMetricManager

All Implemented Interfaces:

MetricManager

public class DoNothingMetricManager
extends Object
implements MetricManager

Field Summary

Fields

Modifier and Type	Field and Description
static DoNothingCounter	doNothingCounter
static DoNothingGauge	doNothingGauge
static DoNothingHistogram	doNothingHistogram
static DoNothingRate	doNothingRate
static DoNothingTimer	doNothingTimer

Constructor Summary

Constructors

Constructor and Description
DoNothingMetricManager()

Method Summary

Modifier and Type	Method and Description
void	count(long delta, String metric, MetricLevel metricLevel, String... tags) update Counter.
void	gauge(long value, String metric, MetricLevel metricLevel, String... tags) set init value of Gauge.
Map<String[],Counter>	getAllCounters() Get all counters
Map<String[],Gauge>	getAllGauges() Get all gauges
Map<String[],Histogram>	getAllHistograms() Get all histogram
List<String[]>	getAllMetricKeys() get all metric keys.
Map<String[],Rate>	getAllRates() Get all rates
Map<String[],Timer>	getAllTimers() Get all timers
<T> Gauge	getOrCreateAutoGauge(String metric, MetricLevel metricLevel, T obj, ToLongFunction<T> mapper, String... tags) Get Gauge If exists, then return or create one to return
Counter	getOrCreateCounter(String metric, MetricLevel metricLevel, String... tags) Get Counter If exists, then return or create one to return
Gauge	getOrCreateGauge(String metric, MetricLevel metricLevel, String... tags) Get Gauge If exists, then return or create one to return
Histogram	getOrCreateHistogram(String metric, MetricLevel metricLevel, String... tags) Get Histogram If exists, then return or create one to return
Rate	getOrCreateRate(String metric, MetricLevel metricLevel, String... tags) Get Rate If exists, then return or create one to return
Timer	getOrCreateTimer(String metric, MetricLevel metricLevel, String... tags) Get Timer If exists, then return or create one to return
void	histogram(long value, String metric, MetricLevel metricLevel, String... tags) update Histogram.
boolean	init() init something.
boolean	isEnable() whether is enabled monitor
boolean	isEnable(MetricLevel metricLevel) whether is enabled monitor in specific level
void	rate(long value, String metric, MetricLevel metricLevel, String... tags) update Rate.
void	removeCounter(String metric, String... tags) remove counter
void	removeGauge(String metric, String... tags) remove gauge
void	removeHistogram(String metric, String... tags) remove histogram
void	removeRate(String metric, String... tags) remove rate
void	removeTimer(String metric, String... tags) update timer
boolean	stop() stop everything and clear
void	timer(long delta, TimeUnit timeUnit, String metric, MetricLevel metricLevel, String... tags) update Timer.

Methods inherited from class java.lang.Object

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

Field Detail

doNothingCounter

public static final DoNothingCounter doNothingCounter

doNothingHistogram

public static final DoNothingHistogram doNothingHistogram

doNothingGauge

public static final DoNothingGauge doNothingGauge

doNothingRate

public static final DoNothingRate doNothingRate

doNothingTimer

public static final DoNothingTimer doNothingTimer

Constructor Detail

DoNothingMetricManager

public DoNothingMetricManager()

Method Detail

getOrCreateCounter

public Counter getOrCreateCounter(String metric,
                                  MetricLevel metricLevel,
                                  String... tags)

Description copied from interface: MetricManager

Get Counter If exists, then return or create one to return

Specified by:

getOrCreateCounter in interface MetricManager

tags - string appear in pairs, like sg="ln" will be "sg", "ln"

getOrCreateAutoGauge

public <T> Gauge getOrCreateAutoGauge(String metric,
                                      MetricLevel metricLevel,
                                      T obj,
                                      ToLongFunction<T> mapper,
                                      String... tags)

Description copied from interface: MetricManager

Get Gauge If exists, then return or create one to return

This type of gauge will keep a weak reference of the obj, so it will not prevent the obj's gc. NOTICE: When the obj has already been cleared by gc when you call the gauge's value(), then you will get 0L;

Specified by:

getOrCreateAutoGauge in interface MetricManager

obj - which will be monitored automatically

mapper - use which to map the obj to a long value

getOrCreateGauge

public Gauge getOrCreateGauge(String metric,
                              MetricLevel metricLevel,
                              String... tags)

Description copied from interface: MetricManager

Get Gauge If exists, then return or create one to return

Specified by:

getOrCreateGauge in interface MetricManager

tags - string appear in pairs, like sg="ln" will be "sg", "ln"

getOrCreateHistogram

public Histogram getOrCreateHistogram(String metric,
                                      MetricLevel metricLevel,
                                      String... tags)

Description copied from interface: MetricManager

Get Histogram If exists, then return or create one to return

Specified by:

getOrCreateHistogram in interface MetricManager

tags - string appear in pairs, like sg="ln" will be "sg", "ln"

getOrCreateRate

public Rate getOrCreateRate(String metric,
                            MetricLevel metricLevel,
                            String... tags)

Description copied from interface: MetricManager

Get Rate If exists, then return or create one to return

Specified by:

getOrCreateRate in interface MetricManager

tags - string appear in pairs, like sg="ln" will be "sg", "ln"

getOrCreateTimer

public Timer getOrCreateTimer(String metric,
                              MetricLevel metricLevel,
                              String... tags)

Description copied from interface: MetricManager

Get Timer If exists, then return or create one to return

Specified by:

getOrCreateTimer in interface MetricManager

tags - string appear in pairs, like sg="ln" will be "sg", "ln"

count

public void count(long delta,
                  String metric,
                  MetricLevel metricLevel,
                  String... tags)

Description copied from interface: MetricManager

update Counter. Create if not exists

Specified by:

count in interface MetricManager

histogram

public void histogram(long value,
                      String metric,
                      MetricLevel metricLevel,
                      String... tags)

Description copied from interface: MetricManager

update Histogram. Create if not exists

Specified by:

histogram in interface MetricManager

gauge

public void gauge(long value,
                  String metric,
                  MetricLevel metricLevel,
                  String... tags)

Description copied from interface: MetricManager

set init value of Gauge. Create if not exists

Specified by:

gauge in interface MetricManager

rate

public void rate(long value,
                 String metric,
                 MetricLevel metricLevel,
                 String... tags)

Description copied from interface: MetricManager

update Rate. Create if not exists

Specified by:

rate in interface MetricManager

timer

public void timer(long delta,
                  TimeUnit timeUnit,
                  String metric,
                  MetricLevel metricLevel,
                  String... tags)

Description copied from interface: MetricManager

update Timer. Create if not exists

Specified by:

timer in interface MetricManager

getAllMetricKeys

public List<String[]> getAllMetricKeys()

Description copied from interface: MetricManager

get all metric keys.

Specified by:

getAllMetricKeys in interface MetricManager

Returns:

all MetricKeys, key is metric name, value is tags, which is a string array.

getAllCounters

public Map<String[],Counter> getAllCounters()

Description copied from interface: MetricManager

Get all counters

Specified by:

getAllCounters in interface MetricManager

Returns:

[name, tags...] -> counter

getAllGauges

public Map<String[],Gauge> getAllGauges()

Description copied from interface: MetricManager

Get all gauges

Specified by:

getAllGauges in interface MetricManager

Returns:

[name, tags...] -> gauge

getAllRates

public Map<String[],Rate> getAllRates()

Description copied from interface: MetricManager

Get all rates

Specified by:

getAllRates in interface MetricManager

Returns:

[name, tags...] -> rate

getAllHistograms

public Map<String[],Histogram> getAllHistograms()

Description copied from interface: MetricManager

Get all histogram

Specified by:

getAllHistograms in interface MetricManager

Returns:

[name, tags...] -> histogram

getAllTimers

public Map<String[],Timer> getAllTimers()

Description copied from interface: MetricManager

Get all timers

Specified by:

getAllTimers in interface MetricManager

Returns:

[name, tags...] -> timer

isEnable

public boolean isEnable()

Description copied from interface: MetricManager

whether is enabled monitor

Specified by:

isEnable in interface MetricManager

isEnable

public boolean isEnable(MetricLevel metricLevel)

Description copied from interface: MetricManager

whether is enabled monitor in specific level

Specified by:

isEnable in interface MetricManager

init

public boolean init()

Description copied from interface: MetricManager

init something.

Specified by:

init in interface MetricManager

Returns:

whether success

removeCounter

public void removeCounter(String metric,
                          String... tags)

Description copied from interface: MetricManager

remove counter

Specified by:

removeCounter in interface MetricManager

removeGauge

public void removeGauge(String metric,
                        String... tags)

Description copied from interface: MetricManager

remove gauge

Specified by:

removeGauge in interface MetricManager

removeRate

public void removeRate(String metric,
                       String... tags)

Description copied from interface: MetricManager

remove rate

Specified by:

removeRate in interface MetricManager

removeHistogram

public void removeHistogram(String metric,
                            String... tags)

Description copied from interface: MetricManager

remove histogram

Specified by:

removeHistogram in interface MetricManager

removeTimer

public void removeTimer(String metric,
                        String... tags)

Description copied from interface: MetricManager

update timer

Specified by:

removeTimer in interface MetricManager

stop

public boolean stop()

stop everything and clear

Specified by:

stop in interface MetricManager

Returns: