Package org.apache.druid.server.coordinator.stats

Class CoordinatorRunStats

java.lang.Object

org.apache.druid.server.coordinator.stats.CoordinatorRunStats

@ThreadSafe
public class CoordinatorRunStats
extends Object

Contains statistics typically tracked during a single coordinator run or the runtime of a single coordinator duty.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	CoordinatorRunStats.StatHandler

Constructor Summary

Constructors

Constructor	Description
CoordinatorRunStats()
CoordinatorRunStats(Map<Dimension,String> debugDimensions)	Creates a new CoordinatorRunStats.

Method Summary

Modifier and Type	Method	Description
void	add(CoordinatorStat stat, long value)
void	add(CoordinatorStat stat, RowKey rowKey, long value)
void	addToSegmentStat(CoordinatorStat stat, String tier, String datasource, long value)
String	buildStatsTable()	Builds a printable table of all the collected error, info and debug level stats (if there are qualifying debugDimensions) with non-zero values.
void	clear()
static CoordinatorRunStats	empty()
void	forEachStat(CoordinatorRunStats.StatHandler handler)
long	get(CoordinatorStat stat)
long	get(CoordinatorStat stat, RowKey rowKey)
long	getSegmentStat(CoordinatorStat stat, String tier, String datasource)
CoordinatorRunStats	getSnapshotAndReset()	Creates a new CoordinatorRunStats which represents the snapshot of the stats collected so far in this instance.
boolean	hasStat(CoordinatorStat stat)
int	rowCount()
void	updateMax(CoordinatorStat stat, RowKey rowKey, long value)	Updates the maximum value of the stat for the given RowKey if applicable.

Methods inherited from class java.lang.Object

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

Constructor Detail

CoordinatorRunStats

public CoordinatorRunStats()

CoordinatorRunStats

public CoordinatorRunStats(Map<Dimension,String> debugDimensions)

Creates a new CoordinatorRunStats.

Parameters:

debugDimensions - Dimension values for which all metrics should be collected and logged.

Method Detail

empty

public static CoordinatorRunStats empty()

getSegmentStat

public long getSegmentStat(CoordinatorStat stat,
                           String tier,
                           String datasource)

get

public long get(CoordinatorStat stat)

get

public long get(CoordinatorStat stat,
                RowKey rowKey)

forEachStat

public void forEachStat(CoordinatorRunStats.StatHandler handler)

buildStatsTable

public String buildStatsTable()

Builds a printable table of all the collected error, info and debug level stats (if there are qualifying debugDimensions) with non-zero values.

hasStat

public boolean hasStat(CoordinatorStat stat)

rowCount

public int rowCount()

clear

public void clear()

add

public void add(CoordinatorStat stat,
                long value)

add

public void add(CoordinatorStat stat,
                RowKey rowKey,
                long value)

addToSegmentStat

public void addToSegmentStat(CoordinatorStat stat,
                             String tier,
                             String datasource,
                             long value)

updateMax

public void updateMax(CoordinatorStat stat,
                      RowKey rowKey,
                      long value)

Updates the maximum value of the stat for the given RowKey if applicable.

getSnapshotAndReset

public CoordinatorRunStats getSnapshotAndReset()

Creates a new CoordinatorRunStats which represents the snapshot of the stats collected so far in this instance.

While this method is in progress, any updates made to the stats of this instance by another thread are not guaranteed to be present in the snapshot. But the snapshots are consistent, i.e. stats present in the snapshot created in one invocation of this method are permanently removed from this instance and will not be present in subsequent snapshots.

Returns:

Snapshot of the current state of this CoordinatorRunStats.