org.apache.ignite.internal.processors.cache.distributed.dht

Class GridNoStorageCacheMap

java.lang.Object

org.apache.ignite.internal.processors.cache.GridCacheConcurrentMap

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

public class GridNoStorageCacheMap
extends GridCacheConcurrentMap

Empty cache map that will never store any entries.

Field Summary

Fields inherited from class org.apache.ignite.internal.processors.cache.GridCacheConcurrentMap

ctx, NON_INTERNAL_ARR

Constructor Summary

Constructors

Constructor and Description
GridNoStorageCacheMap(GridCacheContext ctx)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	containsKey(Object key)
GridCacheMapEntry	getEntry(Object key) Returns the entry associated with the specified key in the HashMap.
boolean	isEmpty()
int	publicSize()
void	putAll(Map<KeyCacheObject,CacheObject> m) Copies all of the mappings from the specified map to this map These mappings will replace any mappings that this map had for any of the keys currently in the specified map.
GridCacheMapEntry	putEntry(AffinityTopologyVersion topVer, KeyCacheObject key, CacheObject val)
GridTriple<GridCacheMapEntry>	putEntryIfObsoleteOrAbsent(AffinityTopologyVersion topVer, KeyCacheObject key, CacheObject val, boolean create)
GridCacheMapEntry	randomEntry()
boolean	removeEntry(GridCacheEntryEx e) Removes passed in entry if it presents in the map.
GridCacheMapEntry	removeEntryIfObsolete(KeyCacheObject key) Removes and returns the entry associated with the specified key in the HashMap if entry is obsolete.
int	size() Returns the number of key-value mappings in this map.
String	toString()

Methods inherited from class org.apache.ignite.internal.processors.cache.GridCacheConcurrentMap

allEntries0, allValues, checkConsistency, decrementSize, entries, entries0, entriesx, getEntryFactory, hash, incrementSize, keySet, keySetx, setEntryFactory, stripedEntryIterator, values

Methods inherited from class java.lang.Object

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

Constructor Detail

GridNoStorageCacheMap

public GridNoStorageCacheMap(GridCacheContext ctx)

Parameters:

ctx - Cache context.

Method Detail

isEmpty

public boolean isEmpty()

Overrides:

isEmpty in class GridCacheConcurrentMap

Returns:

True if this map is empty.

size

public int size()

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

Overrides:

size in class GridCacheConcurrentMap

Returns:

the number of key-value mappings in this map.

publicSize

public int publicSize()

Overrides:

publicSize in class GridCacheConcurrentMap

Returns:

Public size.

containsKey

public boolean containsKey(Object key)

Overrides:

containsKey in class GridCacheConcurrentMap

Parameters:

key - Key.

Returns:

True if map contains mapping for provided key.

randomEntry

public GridCacheMapEntry randomEntry()

Overrides:

randomEntry in class GridCacheConcurrentMap

Returns:

Random entry out of hash map.

getEntry

public GridCacheMapEntry getEntry(Object key)

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

Overrides:

getEntry in class GridCacheConcurrentMap

Parameters:

key - Key.

Returns:

Entry.

putEntry

public GridCacheMapEntry putEntry(AffinityTopologyVersion topVer,
                         KeyCacheObject key,
                         @Nullable
                         CacheObject val)

Overrides:

putEntry in class GridCacheConcurrentMap

Parameters:

topVer - Topology version.

key - Key.

val - Value.

Returns:

Cache entry for corresponding key-value pair.

putEntryIfObsoleteOrAbsent

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

Overrides:

putEntryIfObsoleteOrAbsent in class 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).

putAll

public void putAll(Map<KeyCacheObject,CacheObject> m)

Copies all of the mappings from the specified map to this map These mappings will replace any mappings that this map had for any of the keys currently in the specified map.

Overrides:

putAll in class GridCacheConcurrentMap

Parameters:

m - mappings to be stored in this map.

removeEntry

public boolean removeEntry(GridCacheEntryEx e)

Removes passed in entry if it presents in the map.

Overrides:

removeEntry in class GridCacheConcurrentMap

Parameters:

e - Entry to remove.

Returns:

True if remove happened.

removeEntryIfObsolete

public GridCacheMapEntry removeEntryIfObsolete(KeyCacheObject key)

Removes and returns the entry associated with the specified key in the HashMap if entry is obsolete. Returns null if the HashMap contains no mapping for this key.

Overrides:

removeEntryIfObsolete in class GridCacheConcurrentMap

Parameters:

key - Key.

Returns:

Removed entry, possibly null.

toString

public String toString()

Overrides:

toString in class GridCacheConcurrentMap