Class NullImplementation.NullObservableCache

public class NullImplementation.NullObservableCache : NullImplementation.NullCache, IPortableObject, IObservableCache, ICache, IDictionary, ICollection, IEnumerable

Fields

Instance

Since the cache contains no information, only one ever has to exist.

Declaration

public static readonly IObservableCache Instance

Field Value

Type	Description
IObservableCache

Methods

AddCacheListener(ICacheListener)

Add a standard cache listener that will receive all events (inserts, updates, deletes) that occur against the cache, with the key, old-value and new-value included.

Declaration

public void AddCacheListener(ICacheListener listener)

Parameters

Type	Name	Description
ICacheListener	listener	The ICacheListener to add.

Remarks

This has the same result as the following call:

AddCacheListener(listener, (IFilter) null, false);

AddCacheListener(ICacheListener, object, bool)

Add a cache listener for a specific key.

Declaration

public void AddCacheListener(ICacheListener listener, object key, bool isLite)

Parameters

Type	Name	Description
ICacheListener	listener	The ICacheListener to add.
object	key	The key that identifies the entry for which to raise events.
bool	isLite	true to indicate that the CacheEventArgs objects do not have to include the OldValue and NewValue property values in order to allow optimizations.

Remarks

The listeners will receive CacheEventArgs objects, but if isLite is passed as true, they might not contain the OldValue and NewValue properties.

To unregister the ICacheListener, use the RemoveCacheListener(ICacheListener, object) method.

AddCacheListener(ICacheListener, IFilter, bool)

Add a cache listener that receives events based on a filter evaluation.

Declaration

public void AddCacheListener(ICacheListener listener, IFilter filter, bool isLite)

Parameters

Type	Name	Description
ICacheListener	listener	The ICacheListener to add.
IFilter	filter	A filter that will be passed CacheEventArgs objects to select from; a CacheEventArgs will be delivered to the listener only if the filter evaluates to true for that CacheEventArgs; `null` is equivalent to a filter that alway returns true.
bool	isLite	true to indicate that the CacheEventArgs objects do not have to include the OldValue and NewValue property values in order to allow optimizations.

Remarks

The listeners will receive CacheEventArgs objects, but if isLite is passed as true, they might not contain the OldValue and NewValue properties.

To unregister the ICacheListener, use the RemoveCacheListener(ICacheListener, IFilter) method.

RemoveCacheListener(ICacheListener)

Remove a standard cache listener that previously signed up for all events.

Declaration

public void RemoveCacheListener(ICacheListener listener)

Parameters

Type	Name	Description
ICacheListener	listener	The ICacheListener to remove.

Remarks

This has the same result as the following call:

RemoveCacheListener(listener, (IFilter) null);

RemoveCacheListener(ICacheListener, object)

Remove a cache listener that previously signed up for events about a specific key.

Declaration

public void RemoveCacheListener(ICacheListener listener, object key)

Parameters

Type	Name	Description
ICacheListener	listener	The listener to remove.
object	key	The key that identifies the entry for which to raise events.

RemoveCacheListener(ICacheListener, IFilter)

Remove a cache listener that previously signed up for events based on a filter evaluation.

Declaration

public void RemoveCacheListener(ICacheListener listener, IFilter filter)

Parameters

Type	Name	Description
ICacheListener	listener	The ICacheListener to remove.
IFilter	filter	A filter used to evaluate events; `null` is equivalent to a filter that alway returns true.

Implements

IPortableObject

IObservableCache

ICache

IDictionary

ICollection

IEnumerable