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com.tangosol.util
Class NullImplementation.NullBackingMapManagerContext

java.lang.Object
com.tangosol.util.NullImplementation.NullBackingMapManagerContext

All Implemented Interfaces:

BackingMapManagerContext, XmlConfigurable

Enclosing class:

NullImplementation

public static class NullImplementation.NullBackingMapManagerContext

extends java.lang.Object

implements BackingMapManagerContext

An implementation of BackingMapManagerContext that does nothing.

Field Summary

static NullImplementation.NullBackingMapManagerContext

INSTANCE Singleton instance.

Fields inherited from interface com.tangosol.net.BackingMapManagerContext

DECO_CUSTOM, DECO_EXPIRY, DECO_STORE

Method Summary

java.lang.Object	addInternalValueDecoration(java.lang.Object oValue, int nDecorId, java.lang.Object oDecor) Decorate a specified value in the internal form with a specified decoration in the "normal" Object form.
java.util.Map	getBackingMap(java.lang.String sCacheName) Obtain a reference to the backing map that corresponds to the specified cache name.
BackingMapContext	getBackingMapContext(java.lang.String sCacheName) Obtain a reference to the BackingMapContext that corresponds to the specified cache name.
CacheService	getCacheService() Return the CacheService associated with this context.
java.lang.ClassLoader	getClassLoader() Return the ClassLoader associated with this context.
XmlElement	getConfig() Determine the current configuration of the associated BackingMapManager.
java.lang.Object	getInternalValueDecoration(java.lang.Object oValue, int nDecorId) Obtain a decoration from the specified value in the internal form.
Converter	getKeyFromInternalConverter() Return a converter that allows the manager (or a backing map managed thereby) to convert a key object from its internal form (as managed by the CacheService) into its "normal" (Object) form.
int	getKeyPartition(java.lang.Object oKey) Determine the partition to which the specified key belongs.
Converter	getKeyToInternalConverter() Return a converter that allows the manager (or a backing map managed thereby) to convert a key object into its internal form as managed by the CacheService.
BackingMapManager	getManager() Return the BackingMapManager this object is a context for.
java.util.Set	getPartitionKeys(java.lang.String sCacheName, int nPartition) Obtain a collection of keys in the internal format that belong to the specified partition for the specified backing map.
Converter	getValueFromInternalConverter() Return a converter that allows the manager (or a backing map managed thereby) to convert a value object from its internal form (as managed by the CacheService) into its "normal" (Object) form.
Converter	getValueToInternalConverter() Return a converter that allows the manager (or a backing map managed thereby) to convert a value object into its internal form as managed by the CacheService.
boolean	isInternalValueDecorated(java.lang.Object oValue, int nDecorId) Check whether or not the specified value in the internal form is decorated.
boolean	isKeyOwned(java.lang.Object oKey) Determines whether or not the specified key (in the internal format) is managed (i.e. controlled) by this service member.
java.lang.Object	removeInternalValueDecoration(java.lang.Object oValue, int nDecorId) Remove a decoration from the specified value in the internal form.
void	setClassLoader(java.lang.ClassLoader loader) Assign the ClassLoader this context is associated with.
void	setConfig(XmlElement xml) Specify the configuration for the associated BackingMapManager.

Field Detail

INSTANCE

public static final NullImplementation.NullBackingMapManagerContext INSTANCE

Singleton instance.

Method Detail

getManager

public BackingMapManager getManager()

Return the BackingMapManager this object is a context for.

Specified by:

getManager in interface BackingMapManagerContext

Returns:

the BackingMapManager this object is a context for

getCacheService

public CacheService getCacheService()

Return the CacheService associated with this context.

Specified by:

getCacheService in interface BackingMapManagerContext

Returns:

the CacheService associated with this context

getClassLoader

public java.lang.ClassLoader getClassLoader()

Return the ClassLoader associated with this context.

Specified by:

getClassLoader in interface BackingMapManagerContext

Returns:

the ClassLoader associated with this context

setClassLoader

public void setClassLoader(java.lang.ClassLoader loader)

Assign the ClassLoader this context is associated with.

Specified by:

setClassLoader in interface BackingMapManagerContext

Parameters:

loader - the ClassLoader associated with this context

getKeyToInternalConverter

public Converter getKeyToInternalConverter()

Return a converter that allows the manager (or a backing map managed thereby) to convert a key object into its internal form as managed by the CacheService.

Specified by:

getKeyToInternalConverter in interface BackingMapManagerContext

Returns:

the object-to-internal converter

getKeyFromInternalConverter

public Converter getKeyFromInternalConverter()

Return a converter that allows the manager (or a backing map managed thereby) to convert a key object from its internal form (as managed by the CacheService) into its "normal" (Object) form. If a ClassLoader is available, it will be used if deserialization is involved in the conversion.

Specified by:

getKeyFromInternalConverter in interface BackingMapManagerContext

Returns:

the internal-to-object converter

getValueToInternalConverter

public Converter getValueToInternalConverter()

Return a converter that allows the manager (or a backing map managed thereby) to convert a value object into its internal form as managed by the CacheService.

Specified by:

getValueToInternalConverter in interface BackingMapManagerContext

Returns:

the object-to-internal converter

getValueFromInternalConverter

public Converter getValueFromInternalConverter()

Return a converter that allows the manager (or a backing map managed thereby) to convert a value object from its internal form (as managed by the CacheService) into its "normal" (Object) form. If a ClassLoader is available, it will be used if deserialization is involved in the conversion.

Specified by:

getValueFromInternalConverter in interface BackingMapManagerContext

Returns:

the internal-to-object converter

isKeyOwned

public boolean isKeyOwned(java.lang.Object oKey)

Determines whether or not the specified key (in the internal format) is managed (i.e. controlled) by this service member. In other words, is the specified key under the management of the backing map whose manager this context represents. The key does not have to actually exist for this method to evaluate it; the answer is not backing map- specific.

Specified by:

isKeyOwned in interface BackingMapManagerContext

Parameters:

oKey - the resource key in the internal format

Returns:

true iff the key is managed by this service member

getKeyPartition

public int getKeyPartition(java.lang.Object oKey)

Determine the partition to which the specified key belongs.

Specified by:

getKeyPartition in interface BackingMapManagerContext

Parameters:

oKey - a key in its internal format

Returns:

the partition ID that the specified key is assigned to

getPartitionKeys

public java.util.Set getPartitionKeys(java.lang.String sCacheName,
                                      int nPartition)

Obtain a collection of keys in the internal format that belong to the specified partition for the specified backing map. The returned Set must be used in a read-only manner.

Specified by:

getPartitionKeys in interface BackingMapManagerContext

Parameters:

sCacheName - the cache name for the backing map to retrieve the set of keys for

nPartition - the partition ID

Returns:

the Set of keys in the internal format; could be null if the backing map does not exists or the specified partition is not owned by this node

getBackingMap

public java.util.Map getBackingMap(java.lang.String sCacheName)

Obtain a reference to the backing map that corresponds to the specified cache name. The returned Map must be used in a read-only manner.

Specified by:

getBackingMap in interface BackingMapManagerContext

Parameters:

sCacheName - the cache name

Returns:

the backing map reference; null if the backing map does not exist

addInternalValueDecoration

public java.lang.Object addInternalValueDecoration(java.lang.Object oValue,
                                                   int nDecorId,
                                                   java.lang.Object oDecor)

Decorate a specified value in the internal form with a specified decoration in the "normal" Object form. It's important to understand that applying the internal converter to either passed-in or returned internal values will produce identical values in Object form.

Specified by:

addInternalValueDecoration in interface BackingMapManagerContext

Parameters:

oValue - a value in the internal form

nDecorId - a decoration identifier; valid decoration identifiers are any of the DECO_* constant values

oDecor - a decoration value in Object form

Returns:

a decorated value in the internal form

removeInternalValueDecoration

public java.lang.Object removeInternalValueDecoration(java.lang.Object oValue,
                                                      int nDecorId)

Remove a decoration from the specified value in the internal form. If the specified value is not decorated, the call will have no effect. It's important to understand that applying the internal converter to either passed-in or returned internal values will produce identical values in Object form.

Specified by:

removeInternalValueDecoration in interface BackingMapManagerContext

Parameters:

oValue - a decorated value in the internal form

nDecorId - a decoration identifier; valid decoration identifiers are any of the DECO_* constant values

Returns:

an un-decorated value in the internal form

isInternalValueDecorated

public boolean isInternalValueDecorated(java.lang.Object oValue,
                                        int nDecorId)

Check whether or not the specified value in the internal form is decorated.

Specified by:

isInternalValueDecorated in interface BackingMapManagerContext

Parameters:

oValue - a decorated value in the internal form

nDecorId - a decoration identifier; valid decoration identifiers are any of the DECO_* constant values

Returns:

true if the value is decorated using the specified decoration id; false otherwise

getInternalValueDecoration

public java.lang.Object getInternalValueDecoration(java.lang.Object oValue,
                                                   int nDecorId)

Obtain a decoration from the specified value in the internal form. If the specified value is decorated with the specified decoration id, a value in a "normal" Object form is returned; otherwise null.

Specified by:

getInternalValueDecoration in interface BackingMapManagerContext

Parameters:

oValue - a decorated value in the internal form

nDecorId - a decoration identifier; valid decoration identifiers are any of the DECO_* constant values

Returns:

an un-decorated value in the internal form

getBackingMapContext

public BackingMapContext getBackingMapContext(java.lang.String sCacheName)

Obtain a reference to the BackingMapContext that corresponds to the specified cache name.

Note: calling this method will not create a backing map for the specified cache name; it will return null if the cache has yet to be used (e.g. via ConfigurableCacheFactory.ensureCache call) or has been destroyed

Specified by:

getBackingMapContext in interface BackingMapManagerContext

Parameters:

sCacheName - the cache name

Returns:

the corresponding context; null if the cache does not exist

getConfig

public XmlElement getConfig()

Determine the current configuration of the associated BackingMapManager.

Specified by:

getConfig in interface BackingMapManagerContext

Specified by:

getConfig in interface XmlConfigurable

Returns:

the XML configuration or null

setConfig

public void setConfig(XmlElement xml)

Specify the configuration for the associated BackingMapManager. The configuration content is shared between all instances of the corresponding CacheService running on different cluster nodes.

Specified by:

setConfig in interface BackingMapManagerContext

Specified by:

setConfig in interface XmlConfigurable

Parameters:

xml - the XML configuration

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