com.espertech.esper.epl.agg.aggregator
Class AggregatorRate

java.lang.Object
  com.espertech.esper.epl.agg.aggregator.AggregatorRate

All Implemented Interfaces:

AggregationMethod

public class AggregatorRate
extends java.lang.Object
implements AggregationMethod

Aggregation computing an event arrival rate for data windowed-events.

Field Summary

protected double	accumulator
protected boolean	isSet
protected long	latest
protected long	oldest

Constructor Summary

AggregatorRate()

Method Summary

void	clear() Clear out the collection.
void	enter(java.lang.Object value) Apply the value as entering aggregation (entering window).
java.lang.Object	getValue() Returns the current value held.
java.lang.Class	getValueType() Returns the type of the current value.
void	leave(java.lang.Object value) Apply the value as leaving aggregation (leaving window).

Methods inherited from class java.lang.Object

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

Field Detail

accumulator

protected double accumulator

latest

protected long latest

oldest

protected long oldest

isSet

protected boolean isSet

Constructor Detail

AggregatorRate

public AggregatorRate()

Method Detail

enter

public void enter(java.lang.Object value)

Description copied from interface: AggregationMethod

Apply the value as entering aggregation (entering window).

The value can be null since 'null' values may be counted as unique separate values.

Specified by:

enter in interface AggregationMethod

Parameters:

value - to add to aggregate

leave

public void leave(java.lang.Object value)

Description copied from interface: AggregationMethod

Apply the value as leaving aggregation (leaving window).

The value can be null since 'null' values may be counted as unique separate values.

Specified by:

leave in interface AggregationMethod

Parameters:

value - to remove from aggregate

getValue

public java.lang.Object getValue()

Description copied from interface: AggregationMethod

Returns the current value held.

Specified by:

getValue in interface AggregationMethod

Returns:

current value

clear

public void clear()

Description copied from interface: AggregationMethod

Clear out the collection.

Specified by:

clear in interface AggregationMethod

getValueType

public java.lang.Class getValueType()

Description copied from interface: AggregationMethod

Returns the type of the current value.

Specified by:

getValueType in interface AggregationMethod

Returns:

type of values held