streamcruncher.api.aggregator
Class DiffBaselineProvider<T extends java.lang.Comparable>

java.lang.Object
  streamcruncher.api.aggregator.DiffBaselineProvider<T>

All Implemented Interfaces:

Provider

Direct Known Subclasses:

ClusterHealthTest.CountDiffBaselineProvider, ClusterHealthTest.StatsDiffBaselineProvider

public class DiffBaselineProvider<T extends java.lang.Comparable>
extends java.lang.Object
implements Provider

This Provider Class allows the customization of those Partitions with Aggregates that have been declared with the $diff keyword. This Class is used to compute the Baseline for performing the "Diff: New Value - Baseline Value". By default, the Value from the previous cycle (absolute value, not the diff) is used as the Baseline.

Note: Sub-classes must return the Type appropriate for the Aggregate Function on which it is configured.

Field Summary

static java.lang.String

name

Constructor Summary

DiffBaselineProvider()

Method Summary

T	getBaseline(T oldValue, T newValue)
static java.lang.String	getName()

Methods inherited from class java.lang.Object

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

Field Detail

name

public static final java.lang.String name

See Also:

Constant Field Values

Constructor Detail

DiffBaselineProvider

public DiffBaselineProvider()

Method Detail

getBaseline

public T getBaseline(T oldValue,
                     T newValue)

Parameters:

oldValue - Aggregate from previous cycle

newValue - Aggregate from current cycle

Returns:

Baseline value.

getName

public static java.lang.String getName()

Returns:

"DiffBaseline/Default".