Package org.apache.jackrabbit.oak.index.indexer.document.flatfile.pipelined

Class BoundedHistogram

java.lang.Object

org.apache.jackrabbit.oak.index.indexer.document.flatfile.pipelined.BoundedHistogram

public class BoundedHistogram
extends Object

A histogram that keeps a maximum number of buckets (entries). When the histogram is at the limit, it will reject new entries but keep updating the count of the existing entries. Therefore, the counts for the entries in the histogram are correct but if the histogram overflowed, it may be missing some entries.

Constructor Summary

Constructors

Constructor	Description
BoundedHistogram(String name, int maxHistogramSize)

Method Summary

Modifier and Type	Method	Description
void	addEntry(String key)
ConcurrentHashMap<String,LongAdder>	getMap()
boolean	isOverflowed()
String	prettyPrint()
String	prettyPrintTopEntries(int numEntries)

Methods inherited from class java.lang.Object

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

Constructor Details

BoundedHistogram

public BoundedHistogram(String name,
 int maxHistogramSize)

Method Details

addEntry

public void addEntry(String key)

isOverflowed

public boolean isOverflowed()

getMap

public ConcurrentHashMap<String,LongAdder> getMap()

prettyPrint

public String prettyPrint()

prettyPrintTopEntries

public String prettyPrintTopEntries(int numEntries)