org.apache.hadoop.hbase.metrics.impl

Class FastLongHistogram.Bins

java.lang.Object

org.apache.hadoop.hbase.metrics.impl.FastLongHistogram.Bins

Enclosing class:

FastLongHistogram

private static class FastLongHistogram.Bins
extends Object

Bins is a class containing a list of buckets(or bins) for estimation histogram of some data.

Field Summary

Fields

Modifier and Type	Field and Description
private long	bins10XMax
private long	binsMax
private long	binsMin
private LongAdder	count
private LongAdder[]	counts
private boolean	hasData
private AtomicLong	max
private AtomicLong	min
private LongAdder	total

Constructor Summary

Constructors

Constructor and Description
Bins(FastLongHistogram.Bins last, int numBins, double minQ, double maxQ) The constructor for creating a Bins with last Bins.
Bins(int numBins) The constructor for creating a Bins without any prior data.

Method Summary

Modifier and Type	Method and Description
void	add(long value, long count) Adds a value to the histogram.
private LongAdder[]	createCounters(int numBins)
private int	getIndex(long value)
long	getMean()
long	getMin()
(package private) long	getNumAtOrBelow(long val)
long[]	getQuantiles(double[] quantiles) Computes the quantiles give the ratios.

Methods inherited from class java.lang.Object

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

Field Detail

counts

private final LongAdder[] counts

binsMin

private final long binsMin

binsMax

private final long binsMax

bins10XMax

private final long bins10XMax

min

private final AtomicLong min

max

private final AtomicLong max

count

private final LongAdder count

total

private final LongAdder total

hasData

private volatile boolean hasData

Constructor Detail

Bins

public Bins(int numBins)

The constructor for creating a Bins without any prior data.

Bins

public Bins(FastLongHistogram.Bins last,
            int numBins,
            double minQ,
            double maxQ)

The constructor for creating a Bins with last Bins.

Method Detail

createCounters

private LongAdder[] createCounters(int numBins)

getIndex

private int getIndex(long value)

add

public void add(long value,
                long count)

Adds a value to the histogram.

getQuantiles

public long[] getQuantiles(double[] quantiles)

Computes the quantiles give the ratios.

getNumAtOrBelow

long getNumAtOrBelow(long val)

getMin

public long getMin()

getMean

public long getMean()