Class AsyncLazy<T>

Provides support for asynchronous lazy initialization.

Inheritance
Object
AsyncLazy<T>
Namespace: DotNext.Threading
Assembly: DotNext.Threading.dll
Syntax
public class AsyncLazy<T> : object
Type Parameters
Name Description
T

The type of object that is being asynchronously initialized.

Constructors

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AsyncLazy(T)

Initializes a new instance of lazy value which is already computed.

Declaration
public AsyncLazy(T value)
Parameters
Type Name Description
T value

Already computed value.
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AsyncLazy(Func<Task<T>>, Boolean)

Initializes a new instance of lazy value.

Declaration
public AsyncLazy(Func<Task<T>> valueFactory, bool resettable = false)
Parameters
Type Name Description
Func<Task<T>> valueFactory

The function used to compute actual value.
Boolean resettable

true if previously computed value can be removed and computation executed again when it will be requested; false if value can be computed exactly once.
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AsyncLazy(ValueFunc<Task<T>>, Boolean)

Initializes a new instance of lazy value.

Declaration
public AsyncLazy(ValueFunc<Task<T>> valueFactory, bool resettable = false)
Parameters
Type Name Description
ValueFunc<Task<T>> valueFactory

The function used to compute actual value.
Boolean resettable

true if previously computed value can be removed and computation executed again when it will be requested; false if value can be computed exactly once.

Properties

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IsValueCreated

Gets a value that indicates whether a value has been computed.

Declaration
public bool IsValueCreated { get; }
Property Value
Type Description
Boolean
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Task

Gets task representing asynchronous computation of lazy value.

Declaration
public Task<T> Task { get; }
Property Value
Type Description
Task<T>
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Value

Gets value if it is already computed.

Declaration
public Result<T>? Value { get; }
Property Value
Type Description
Nullable<Result<T>>

Methods

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ConfigureAwait(Boolean)

Configures an awaiter used to await asynchronous lazy initialization.

Declaration
public ConfiguredTaskAwaitable<T> ConfigureAwait(bool continueOnCapturedContext)
Parameters
Type Name Description
Boolean continueOnCapturedContext

true to attempt to marshal the continuation back to the original context captured; otherwise, false.
Returns
Type Description
ConfiguredTaskAwaitable<T>

An object used to await asynchronous lazy initialization.
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GetAwaiter()

Gets awaiter for the asynchronous operation responsible for computing value.

Declaration
public TaskAwaiter<T> GetAwaiter()
Returns
Type Description
TaskAwaiter<T>

The task awaiter.
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Reset()

Removes already computed value from the current object.

Declaration
public bool Reset()
Returns
Type Description
Boolean

true if previous value is removed successfully; false if value is still computing or this instance is not resettable.
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ToString()

Returns textual representation of this object.

Declaration
public override string ToString()
Returns
Type Description
String

The string representing this object.

Extension Methods