Package io.opencensus.stats

Class Aggregation

java.lang.Object

io.opencensus.stats.Aggregation

Direct Known Subclasses:

Aggregation.Count, Aggregation.Distribution, Aggregation.LastValue, Aggregation.Mean, Aggregation.Sum

@Immutable
public abstract class Aggregation
extends java.lang.Object

Aggregation is the process of combining a certain set of MeasureValues for a given Measure into an AggregationData.

Aggregation currently supports 4 types of basic aggregation:

• Sum
• Count
• Distribution
• LastValue

When creating a View, one Aggregation needs to be specified as how to aggregate MeasureValues.

Since:

0.8

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Aggregation.Count	Calculate count on aggregated MeasureValues.
static class	Aggregation.Distribution	Calculate distribution stats on aggregated MeasureValues.
static class	Aggregation.LastValue	Calculate the last value of aggregated MeasureValues.
static class	Aggregation.Mean	Deprecated. since 0.13, use Aggregation.Distribution instead.
static class	Aggregation.Sum	Calculate sum on aggregated MeasureValues.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Aggregation()

Method Summary

Modifier and Type	Method	Description
abstract <T> T	match(Function<? super Aggregation.Sum,T> p0, Function<? super Aggregation.Count,T> p1, Function<? super Aggregation.Distribution,T> p2, Function<? super Aggregation.LastValue,T> p3, Function<? super Aggregation,T> defaultFunction)	Applies the given match function to the underlying data type.

Methods inherited from class java.lang.Object

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

Constructor Detail

Aggregation

private Aggregation()

Method Detail

match

public abstract <T> T match(Function<? super Aggregation.Sum,T> p0,
                            Function<? super Aggregation.Count,T> p1,
                            Function<? super Aggregation.Distribution,T> p2,
                            Function<? super Aggregation.LastValue,T> p3,
                            Function<? super Aggregation,T> defaultFunction)

Applies the given match function to the underlying data type.

Since:

0.13