com.hazelcast.monitor.impl

Interface IndexOperationStats

All Known Implementing Classes:

GlobalIndexOperationStats, PartitionIndexOperationStats

public interface IndexOperationStats

Provides per-operation statistics tracking for indexes.

Instances of implementing classes are assumed to be used by a single thread at any given time. Therefore, implementations are not required to be thread-safe.

Field Summary

Fields

Modifier and Type	Field and Description
static IndexOperationStats	EMPTY Empty no-op index operation stats instance.

Method Summary

Modifier and Type	Method and Description
long	getEntryCountDelta() Returns the indexed entry count delta produced as a result of an index operation.
long	getMemoryCostDelta() Returns the memory cost delta produced as a result of an index operation.
void	onEntryAdded(Object replacedValue, Object addedValue) Invoked by the associated index on every entry addition.
void	onEntryRemoved(Object removedValue) Invoked by the associated index on every entry removal.

Field Detail

EMPTY

static final IndexOperationStats EMPTY

Empty no-op index operation stats instance.

Method Detail

getEntryCountDelta

long getEntryCountDelta()

Returns the indexed entry count delta produced as a result of an index operation.

getMemoryCostDelta

long getMemoryCostDelta()

Returns the memory cost delta produced as a result of an index operation.

onEntryAdded

void onEntryAdded(Object replacedValue,
                  Object addedValue)

Invoked by the associated index on every entry addition.

Parameters:

replacedValue - the old replaced value or null if no value was associated with an index key for which an operation was performed.

addedValue - the new added value.

onEntryRemoved

void onEntryRemoved(Object removedValue)

Invoked by the associated index on every entry removal.

Parameters:

removedValue - the old removed value or null if no value was associated with an index key for which an operation was performed.