Class ConcurrentDictionaryExtensions

Extensions used to manage asynchronous access to the ImageSharpMiddleware https://gist.github.com/davidfowl/3dac8f7b3d141ae87abf770d5781feed

Inheritance

Object

ConcurrentDictionaryExtensions

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: SixLabors.ImageSharp.Web.Middleware

Assembly: SixLabors.ImageSharp.Web.dll

Syntax

public static class ConcurrentDictionaryExtensions

Methods

GetOrAddAsync<TKey, TValue>(ConcurrentDictionary<TKey, Task<TValue>>, TKey, Func<TKey, Task<TValue>>)

Provides an alternative to GetOrAdd(TKey, Func<TKey,TValue>) specifically for asynchronous values. The factory method will only run once.

Declaration

public static async Task<TValue> GetOrAddAsync<TKey, TValue>(this ConcurrentDictionary<TKey, Task<TValue>> dictionary, TKey key, Func<TKey, Task<TValue>> valueFactory)

Parameters

Type	Name	Description
ConcurrentDictionary<TKey, Task<TValue>>	dictionary	The ConcurrentDictionary<TKey,TValue>.
TKey	key	The key of the element to add.
Func<TKey, Task<TValue>>	valueFactory	The function used to generate a value for the key

Returns

Type	Description
Task<TValue>	The value for the key. This will be either the existing value for the key if the key is already in the dictionary, or the new value for the key as returned by valueFactory if the key was not in the dictionary.

Type Parameters

Name	Description
TKey	The type of the key.
TValue	The value for the dictionary.