Package org.apache.ignite.internal.processors.cache

Class GridNoStorageCacheMap

java.lang.Object

org.apache.ignite.internal.processors.cache.GridNoStorageCacheMap

All Implemented Interfaces:

GridCacheConcurrentMap

public class GridNoStorageCacheMap
extends Object
implements GridCacheConcurrentMap

Empty cache map that will never store any entries.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.ignite.internal.processors.cache.GridCacheConcurrentMap

GridCacheConcurrentMap.CacheMapHolder

Constructor Summary

Constructors

Constructor	Description
GridNoStorageCacheMap()

Method Summary

Modifier and Type	Method	Description
void	decrementPublicSize(GridCacheConcurrentMap.CacheMapHolder hld, GridCacheEntryEx e)	Decrements public size.
Iterable<GridCacheMapEntry>	entries(int cacheId, CacheEntryPredicate... filter)
Set<GridCacheMapEntry>	entrySet(int cacheId, CacheEntryPredicate... filter)
@Nullable GridCacheMapEntry	getEntry(GridCacheContext ctx, KeyCacheObject key)	Returns the entry associated with the specified key in the HashMap.
void	incrementPublicSize(GridCacheConcurrentMap.CacheMapHolder hld, GridCacheEntryEx e)	Increments public size.
int	internalSize()	Returns the number of key-value mappings in this map.
int	publicSize(int cacheId)	Returns the number of publicly available key-value mappings in this map.
GridCacheMapEntry	putEntryIfObsoleteOrAbsent(GridCacheContext ctx, AffinityTopologyVersion topVer, KeyCacheObject key, boolean create, boolean skipReserve)
boolean	removeEntry(GridCacheEntryEx entry)	Removes passed in entry if it presents in the map.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridNoStorageCacheMap

public GridNoStorageCacheMap()

Method Detail

getEntry

@Nullable
public @Nullable GridCacheMapEntry getEntry(GridCacheContext ctx,
                                            KeyCacheObject key)

Returns the entry associated with the specified key in the HashMap. Returns null if the HashMap contains no mapping for this key.

Specified by:

getEntry in interface GridCacheConcurrentMap

Parameters:

ctx - Cache context.

key - Key.

Returns:

Entry.

putEntryIfObsoleteOrAbsent

public GridCacheMapEntry putEntryIfObsoleteOrAbsent(GridCacheContext ctx,
                                                    AffinityTopologyVersion topVer,
                                                    KeyCacheObject key,
                                                    boolean create,
                                                    boolean skipReserve)

Specified by:

putEntryIfObsoleteOrAbsent in interface GridCacheConcurrentMap

Parameters:

ctx - Cache context.

topVer - Topology version.

key - Key.

create - Create flag.

skipReserve - Skip partition reservation flag.

Returns:

Existing or new GridCacheMapEntry. Will return null if entry is obsolete or absent and create flag is set to false. Will also return null if create flag is set to true, but entry couldn't be created.

removeEntry

public boolean removeEntry(GridCacheEntryEx entry)

Removes passed in entry if it presents in the map.

Specified by:

removeEntry in interface GridCacheConcurrentMap

Parameters:

entry - Entry to remove.

Returns:

True if remove happened.

internalSize

public int internalSize()

Returns the number of key-value mappings in this map. It does not include entries from underlying data store.

Specified by:

internalSize in interface GridCacheConcurrentMap

Returns:

the number of key-value mappings in this map.

publicSize

public int publicSize(int cacheId)

Returns the number of publicly available key-value mappings in this map. It excludes entries that are marked as deleted. It also does not include entries from underlying data store.

Specified by:

publicSize in interface GridCacheConcurrentMap

Parameters:

cacheId - Cache ID.

Returns:

the number of publicly available key-value mappings in this map.

incrementPublicSize

public void incrementPublicSize(GridCacheConcurrentMap.CacheMapHolder hld,
                                GridCacheEntryEx e)

Increments public size.

Specified by:

incrementPublicSize in interface GridCacheConcurrentMap

Parameters:

hld - Cache map (passed as optimization to avoid cache map lookup for shared groups).

e - Entry that caused public size change.

decrementPublicSize

public void decrementPublicSize(GridCacheConcurrentMap.CacheMapHolder hld,
                                GridCacheEntryEx e)

Decrements public size.

Specified by:

decrementPublicSize in interface GridCacheConcurrentMap

Parameters:

hld - Cache map (passed as optimization to avoid cache map lookup for shared groups).

e - Entry that caused public size change.

entries

public Iterable<GridCacheMapEntry> entries(int cacheId,
                                           CacheEntryPredicate... filter)

Specified by:

entries in interface GridCacheConcurrentMap

Parameters:

cacheId - Cache ID.

filter - Filter.

Returns:

Iterable of the mappings contained in this map, excluding entries in unvisitable state.

entrySet

public Set<GridCacheMapEntry> entrySet(int cacheId,
                                       CacheEntryPredicate... filter)

Specified by:

entrySet in interface GridCacheConcurrentMap

Parameters:

cacheId - Cache ID.

filter - Filter.

Returns:

Set of the mappings contained in this map.