io.opencensus.stats

Class Aggregation

java.lang.Object

io.opencensus.stats.Aggregation

Direct Known Subclasses:

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

@Immutable
public abstract class Aggregation
extends 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
• Mean
• Distribution

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Aggregation.Count Calculate count on aggregated MeasureValues.
static class	Aggregation.Distribution Calculate distribution stats on aggregated MeasureValues.
static class	Aggregation.Mean Calculate mean on aggregated MeasureValues.
static class	Aggregation.Sum Calculate sum on aggregated MeasureValues.

Method Summary

Modifier and Type	Method and Description
abstract <T> T	match(Function<? super Aggregation.Sum,T> p0, Function<? super Aggregation.Count,T> p1, Function<? super Aggregation.Mean,T> p2, Function<? super Aggregation.Distribution,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

Method Detail

match

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

Applies the given match function to the underlying data type.