RKInMemoryEntityCache Class Reference
| Inherits from | NSObject |
| Declared in | RKInMemoryEntityCache.h RKInMemoryEntityCache.m |
Overview
Instances of RKInMemoryEntityCache provide an in-memory caching mechanism for objects in a Core Data managed object context. Managed objects can be cached by attribute for fast retrieval without repeatedly hitting the Core Data persistent store. This can provide a substantial speed advantage over issuing fetch requests in cases where repeated look-ups of the same data are performed using a small set of attributes as the query key. Internally, the cache entries are maintained as references to the NSManagedObjectID of corresponding cached objects.
Tasks
Other Methods
-
managedObjectContextThe managed object context from which objects will be cached.
property
Initializing the Cache
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– initWithManagedObjectContext:Initializes the receiver with a managed object context containing the entity instances to be cached.
Cacheing Objects by Attribute
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– cachedObjectsForEntity:byAttribute:inContext:Retrieves all objects within the cache
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– cachedObjectForEntity:withAttribute:value:inContext: -
– cacheObjectsForEntity:byAttribute:inContext:Caches all instances of an entity in a given managed object context by the value
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– cacheObject:byAttribute:inContext: -
– cacheObject:byAttribute:value:inContext: -
– expireCacheEntryForObject:byAttribute:inContext: -
– expireCacheEntriesForEntity:
Instance Methods
cacheObject:byAttribute:inContext:
- (void)cacheObject:(NSManagedObject *)managedObject byAttribute:(NSString *)attributeName inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hcacheObject:byAttribute:value:inContext:
- (void)cacheObject:(NSEntityDescription *)entity byAttribute:(NSString *)attributeName value:(id)primaryKeyValue inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hcacheObjectsForEntity:byAttribute:inContext:
Caches all instances of an entity in a given managed object context by the value
- (void)cacheObjectsForEntity:(NSEntityDescription *)entity byAttribute:(NSString *)attributeName inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hcachedObjectForEntity:withAttribute:value:inContext:
- (NSManagedObject *)cachedObjectForEntity:(NSEntityDescription *)entity withAttribute:(NSString *)attributeName value:(id)attributeValue inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hcachedObjectsForEntity:byAttribute:inContext:
Retrieves all objects within the cache
- (NSMutableDictionary *)cachedObjectsForEntity:(NSEntityDescription *)entity byAttribute:(NSString *)attributeName inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hexpireCacheEntriesForEntity:
- (void)expireCacheEntriesForEntity:(NSEntityDescription *)entityDeclared In
RKInMemoryEntityCache.hexpireCacheEntryForObject:byAttribute:inContext:
- (void)expireCacheEntryForObject:(NSManagedObject *)managedObject byAttribute:(NSString *)attributeName inContext:(NSManagedObjectContext *)managedObjectContextDeclared In
RKInMemoryEntityCache.hinitWithManagedObjectContext:
Initializes the receiver with a managed object context containing the entity instances to be cached.
- (id)initWithManagedObjectContext:(NSManagedObjectContext *)managedObjectContextParameters
- context
The managed object context containing objects to be cached.
Return Value
self, initialized with context.
Declared In
RKInMemoryEntityCache.h