Achieving Single-Use Async Initialization: A Superior Approach
A frequent programming challenge involves executing a critical asynchronous method only once. While SemaphoreSlim
can achieve this, AsyncLazy
offers a more elegant and concise solution.
Introducing AsyncLazy: A Streamlined Solution
AsyncLazy
is essentially a modified Lazy<t></t>
designed for asynchronous operations. It lazily initializes a value upon the first access, perfectly suited for managing one-time async initializations.
Implementation Details
Here's how to use AsyncLazy
to ensure your async initialization runs only once:
private AsyncLazy<bool> asyncLazy = new AsyncLazy<bool>(async () => { await DoStuffOnlyOnceAsync(); return true; });
This creates an AsyncLazy
instance wrapping the asynchronous initialization logic within DoStuffOnlyOnceAsync
. The result is a lazy task that executes only on the first access.
Usage Example
To trigger the initialization and await its completion, simply use GetAwaiter()
:
var isInitialized = await asyncLazy.GetAwaiter();
This will initiate DoStuffOnlyOnceAsync
(if it hasn't already run) and return a boolean indicating success.
Summary
AsyncLazy
provides a clean and efficient method for ensuring a single execution of a crucial asynchronous method. By encapsulating the initialization within a lazy task, it simplifies the code and offers a user-friendly way to access the result.
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