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.

Constructor Summary

Constructors

Constructor and Description
GridNoStorageCacheMap(GridCacheContext ctx)

Method Summary

Methods

Modifier and Type	Method and Description
Iterable<GridCacheMapEntry>	allEntries(CacheEntryPredicate... filter)
void	decrementPublicSize(GridCacheEntryEx e) Decrements public size.
Iterable<GridCacheMapEntry>	entries(CacheEntryPredicate... filter)
Set<GridCacheMapEntry>	entrySet(CacheEntryPredicate... filter)
GridCacheMapEntry	getEntry(KeyCacheObject key) Returns the entry associated with the specified key in the HashMap.
void	incrementPublicSize(GridCacheEntryEx e) Increments public size.
Set<KeyCacheObject>	keySet(CacheEntryPredicate... filter)
int	publicSize() Returns the number of publicly available key-value mappings in this map.
GridCacheMapEntry	putEntryIfObsoleteOrAbsent(AffinityTopologyVersion topVer, KeyCacheObject key, CacheObject val, boolean create, boolean touch)
GridCacheMapEntry	randomEntry()
boolean	removeEntry(GridCacheEntryEx entry) Removes passed in entry if it presents in the map.
int	size() Returns the number of key-value mappings in this map.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridNoStorageCacheMap

public GridNoStorageCacheMap(GridCacheContext ctx)

Parameters:

ctx - Cache context.

Method Detail

getEntry

@Nullable
public GridCacheMapEntry getEntry(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:

key - Key.

Returns:

Entry.

putEntryIfObsoleteOrAbsent

public GridCacheMapEntry putEntryIfObsoleteOrAbsent(AffinityTopologyVersion topVer,
                                           KeyCacheObject key,
                                           @Nullable
                                           CacheObject val,
                                           boolean create,
                                           boolean touch)

Specified by:

putEntryIfObsoleteOrAbsent in interface GridCacheConcurrentMap

Parameters:

topVer - Topology version.

key - Key.

val - Value.

create - Create flag.

Returns:

Triple where the first element is current entry associated with the key, the second is created entry and the third is doomed (all may be null).

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.

size

public int size()

Returns the number of key-value mappings in this map.

Specified by:

size in interface GridCacheConcurrentMap

Returns:

the number of key-value mappings in this map.

publicSize

public int publicSize()

Returns the number of publicly available key-value mappings in this map. It excludes entries that are marked as deleted.

Specified by:

publicSize in interface GridCacheConcurrentMap

Returns:

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

incrementPublicSize

public void incrementPublicSize(GridCacheEntryEx e)

Increments public size.

Specified by:

incrementPublicSize in interface GridCacheConcurrentMap

Parameters:

e - Entry that caused public size change.

decrementPublicSize

public void decrementPublicSize(GridCacheEntryEx e)

Decrements public size.

Specified by:

decrementPublicSize in interface GridCacheConcurrentMap

Parameters:

e - Entry that caused public size change.

randomEntry

@Nullable
public GridCacheMapEntry randomEntry()

Specified by:

randomEntry in interface GridCacheConcurrentMap

keySet

public Set<KeyCacheObject> keySet(CacheEntryPredicate... filter)

Specified by:

keySet in interface GridCacheConcurrentMap

Returns:

Random entry out of hash map.

entries

public Iterable<GridCacheMapEntry> entries(CacheEntryPredicate... filter)

Specified by:

entries in interface GridCacheConcurrentMap

Parameters:

filter - Filter.

Returns:

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

allEntries

public Iterable<GridCacheMapEntry> allEntries(CacheEntryPredicate... filter)

Specified by:

allEntries in interface GridCacheConcurrentMap

Parameters:

filter - Filter.

Returns:

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

entrySet

public Set<GridCacheMapEntry> entrySet(CacheEntryPredicate... filter)

Specified by:

entrySet in interface GridCacheConcurrentMap

Parameters:

filter - Filter.

Returns:

Set of the mappings contained in this map.