com.hazelcast.spi.hotrestart.impl.gc.tracker

Interface TrackerMap

All Superinterfaces:

com.hazelcast.nio.Disposable

All Known Implementing Classes:

TrackerMapBase, TrackerMapOffHeap, TrackerMapOnHeap

public interface TrackerMap
extends com.hazelcast.nio.Disposable

Special-purpose map from KeyHandle to Tracker, used to hold global GC-related metadata about all records in the Hot Restart Store.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	TrackerMap.Cursor Cursor over tracker map's entries.

Method Summary

Modifier and Type	Method and Description
TrackerMap.Cursor	cursor()
Tracker	get(KeyHandle kh) Returns the tracker mapped by the supplied KeyHandle, if any; otherwise returns null.
Tracker	putIfAbsent(KeyHandle kh, long chunkSeq, boolean isTombstone) If there is no current mapping for kh, establishes a mapping from kh to a tracker defined by (chunkSeq, isTombstone) and returns null.
void	removeIfDead(KeyHandle kh, Tracker tr) Removes the entry for tr if tr represents a dead record.
void	removeLiveTombstone(KeyHandle kh) Removes the entry for kh assuming that it maps to a tracker representing a live tombstone.
long	size()

Methods inherited from interface com.hazelcast.nio.Disposable

dispose

Method Detail

putIfAbsent

Tracker putIfAbsent(KeyHandle kh,
                    long chunkSeq,
                    boolean isTombstone)

If there is no current mapping for kh, establishes a mapping from kh to a tracker defined by (chunkSeq, isTombstone) and returns null. If a mapping already exists, returns the existing tracker without updating it.

get

Tracker get(KeyHandle kh)

Returns the tracker mapped by the supplied KeyHandle, if any; otherwise returns null. Warning! The returned instance is valid only up to the next operation on this map, including another get. The caller should generally not retain it.

removeLiveTombstone

void removeLiveTombstone(KeyHandle kh)

Removes the entry for kh assuming that it maps to a tracker representing a live tombstone. This assumption is not verified.

removeIfDead

void removeIfDead(KeyHandle kh,
                  Tracker tr)

Removes the entry for tr if tr represents a dead record. tr must be the tracker mapped under kh, but this is not verified.

size

long size()

Returns:

the number of entries in this map.

cursor

TrackerMap.Cursor cursor()