CacheWorker

internal class CacheWorker : NSDiscardableContent

An interface to the NSCache.

Initializers

  • Implemented by subclasses to initialize a new object (the receiver) immediately after memory for it has been allocated.

    Declaration

    Swift

    init()

  • A deinitializer is called immediately before a class instance is deallocated.

    Declaration

    Swift

    deinit

Properties

  • An object representing the data store manager requesting this information.

    Declaration

    Swift

    var dataStoreManager: DataStoreManager?

  • Asks the delegate for the cost with which associate to the object.

    Declaration

    Swift

    var costDelegate: ((DataStoreManager, Any) -> Int)?

CRUD

  • Undocumented

    Declaration

    Swift

    func create(object: Any, forKey key: String, completionHandler: @escaping (_ isSuccessful: Bool, _ objectID: Any?, _ error: Error?) -> Void)

  • Undocumented

    Declaration

    Swift

    func read(forKey key: String, completionHandler: @escaping (_ object: Any?, _ objectID: Any?, _ error: Error?) -> Void)

  • Undocumented

    Declaration

    Swift

    func update(object: Any, forKey key: String, completionHandler: @escaping (_ isSuccessful: Bool, _ objectID: Any?, _ error: Error?) -> Void)

  • Undocumented

    Declaration

    Swift

    func delete(forKey key: String, completionHandler: @escaping (_ isSuccessful: Bool, _ objectID: Any?, _ error: Error?) -> Void)

  • Undocumented

    Declaration

    Swift

    func deleteAll(completionHandler: @escaping (_ isSuccessful: Bool, _ objectID: Any?, _ error: Error?) -> Void)

NSDiscardableContent

  • Returns a Boolean value indicating whether the discardable contents are still available and have been successfully accessed.

    Call this method if the object’s memory is needed or is about to be used. This method increments the counter variable, thus protecting the object’s memory from possibly being discarded. The implementing class may decide that this method will try to recreate the contents if they have been discarded and return true if the re-creation was successful. Implementors of this protocol should raise exceptions if the NSDiscardableContent objects are used when the beginContentAccess method has not been called on them.

    Declaration

    Swift

    func beginContentAccess() -> Bool

    Return Value

    true if the discardable contents are still available and have now been successfully accessed; otherwise, false.

  • Called if the discardable contents are no longer being accessed.

    This method decrements the counter variable of the object, which will usually bring the value of the counter variable back down to 0, which allows the discardable contents of the object to be thrown away if necessary.

    Declaration

    Swift

    func endContentAccess()

  • Called to discard the contents of the receiver if the value of the accessed counter is 0.

    This method should only discard the contents of the object if the value of the accessed counter is 0. Otherwise, it should do nothing.

    Declaration

    Swift

    func discardContentIfPossible()

  • Returns a Boolean value indicating whether the content has been discarded.

    Declaration

    Swift

    func isContentDiscarded() -> Bool

    Return Value

    true if the content has been discarded; otherwise, false.