KeyValueCache<K, V> class

A cache implementation that caches values based on keys

maxAge can be used to control how long values remain cached If provider is set, the cache will be filled with values from the provider and [] and get can be used to retrieve values from the cache. If provider is not set, only getOrFetch can be used to retrieve values from the cache.

Constructors

KeyValueCache({Duration? maxAge, Future<V> provider(K key)?})

Properties

hashCode → int

The hash code for this object.

no setter, inherited

maxAge → Duration?

The maximum duration a value will be cached. Null means no expiration.

final

provider → (Future<V> Function(K key)?)

A provider function that takes the key of the value to be provided and returns the value future. If this is set, getOrFetch cannot be used but [] and get can be used

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

clear() → void

Clears all cached values

get(K key) → Future<V>

Gets the value for the given key from the cache or uses the provider set in the constructor to calculate (and store) the value.

getOrFetch(K key, Future<V> provider()) → Future<V>

Gets or computes the value for the provided key using the provided provider function and store it in the cache using the provided key.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

remove(K key) → void

Remove a single value from the cache

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

operator [](K key) → Future<V>

Convenience operator that delegates to get