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com.tangosol.net.cache
Class OverflowMap.HistoricCacheEvent

java.lang.Object
java.util.EventObject
com.tangosol.util.MapEvent
com.tangosol.net.cache.CacheEvent
com.tangosol.net.cache.OverflowMap.HistoricCacheEvent

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

OverflowMap

protected static class OverflowMap.HistoricCacheEvent

extends CacheEvent

A CacheEvent that carries a recent value (to avoid it being lost during eviction).

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.net.cache.CacheEvent

CacheEvent.TransformationState

Field Summary

protected java.lang.Object

m_oValueLatestOld A previous value, but the most recent of the previous values.

Fields inherited from class com.tangosol.net.cache.CacheEvent

m_fSynthetic, m_transformState

Fields inherited from class com.tangosol.util.MapEvent

ENTRY_DELETED, ENTRY_INSERTED, ENTRY_UPDATED, m_nId, m_oKey, m_oValueNew, m_oValueOld

Fields inherited from class java.util.EventObject

source

Constructor Summary

OverflowMap.HistoricCacheEvent(ObservableMap map, int nId, java.lang.Object oKey, java.lang.Object oValueOld, java.lang.Object oValueNew, boolean fSynthetic, java.lang.Object oValueRecent)
Create a Historic CacheEvent that contains the most recent value before the now-current value.

Method Summary

java.lang.Object

getLatestOldValue() Obtain the value that needs to be saved if this event represents a merged sequence of events ending with the eviction of data.

Methods inherited from class com.tangosol.net.cache.CacheEvent

getDescription, getTransformationState, isSynthetic

Methods inherited from class com.tangosol.util.MapEvent

dispatch, dispatch, dispatch, getDescription, getId, getKey, getMap, getNewEntry, getNewValue, getOldEntry, getOldValue, toString

Methods inherited from class java.util.EventObject

getSource

Field Detail

m_oValueLatestOld

protected java.lang.Object m_oValueLatestOld

A previous value, but the most recent of the previous values.

Constructor Detail

OverflowMap.HistoricCacheEvent

public OverflowMap.HistoricCacheEvent(ObservableMap map,
                                      int nId,
                                      java.lang.Object oKey,
                                      java.lang.Object oValueOld,
                                      java.lang.Object oValueNew,
                                      boolean fSynthetic,
                                      java.lang.Object oValueRecent)

Create a Historic CacheEvent that contains the most recent value before the now-current value.

Parameters:

map - the ObservableMap object that fired the event

nId - this event id as defined by the MapEvent class

oKey - the key into the map

oValueOld - the old value (for update and delete events)

oValueNew - the new value (for insert and update events)

fSynthetic - true iff the event is historically synthetic

oValueRecent - the most recent value before the new value

Method Detail

getLatestOldValue

public java.lang.Object getLatestOldValue()

Obtain the value that needs to be saved if this event represents a merged sequence of events ending with the eviction of data.

Returns:

the most recent data value before the new value

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