Initializes a new AsyncResult instance.
Class AsyncResult() Foundation
Implements asynchronous result processing with chain support.
Description
The AsyncResult class implements a powerful asynchronous programming model that supports two primary usage patterns:
1. Simple asynchronous result access through :wait() and :get() methods
2. Chain processing through :then(), :catch(), and :finally() methods
This class helps manage asynchronous operations by providing a standardized way to handle both successful results and error conditions. It allows operations to complete in the background while providing a consistent interface for accessing results when they become available.
An AsyncResult object begins in a waiting state and transitions to either a finished state (when completed successfully) or an error state (when an error occurs). The state transition is triggered by producer code calling either :signal() or :signalError().
Methods
:catch()
Chains an error handler to execute when the operation fails.
:error()
Returns the error object if the operation failed.
:finally()
Chains a finalization handler to execute when the operation completes.
:get()
Gets the result value, blocking if not ready.
:signal()
Signals successful completion with a result value.
:signalError()
Signals an error condition with an error object.
:state()
Returns the current state of the AsyncResult.
:then()
Chains a success handler to execute when the operation completes.
:wait()
Waits for the operation to complete with optional timeout.
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