Fix/init #75
Fix/init #75
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Refactors the `AppDependencies` singleton to use a `Completer` for managing the asynchronous initialization process. This change introduces an atomic, thread-safe mechanism that ensures the core initialization logic runs exactly once, even when multiple concurrent requests trigger the `init()` method during server startup or hot reload. The previous implementation was vulnerable to a race condition where a second request could bypass the `_isInitialized` check before the first request had completed, leading to a `LateInitializationError`. The new `Completer`-based approach solves this by having all concurrent callers `await` the same `Future`, guaranteeing a single execution.
Resolves the `unawaited_futures` lint warning by wrapping the call to `_initializeDependencies()` with `unawaited()`. This makes it explicit that the future is intentionally not being awaited at this call site, as the logic is correctly handled by the `_initCompleter`.
…ation - Add guard to ensure only one instance of dependency initialization runs at a time - Update CHANGELOG.md to reflect the upcoming fix
Summary of ChangesHello @fulleni, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request addresses a potential race condition in the application's dependency initialization process. By introducing a Highlights
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Code Review
This pull request effectively resolves a race condition during concurrent dependency initialization by introducing a Completer to manage the asynchronous setup. The approach is sound. However, I've identified a new potential race condition in the dispose method that could arise if it's called while initialization is still running. My review includes a high-severity fix for this issue. I've also provided a couple of medium-severity suggestions for code style and changelog consistency.
Updates the `dispose` method in `AppDependencies` to await the completion of the `_initCompleter` before proceeding with resource cleanup. This change prevents a race condition where `dispose()` could be called while `_initializeDependencies()` is still executing, which would lead to unpredictable errors from tearing down resources that are actively being initialized. The `dispose` method now safely waits for initialization to finish, whether it succeeded or failed, ensuring a clean and predictable shutdown sequence.
Remove 'async' from the 'init' method in AppDependencies class. The method no longer contains 'await' calls, making the 'async' keyword redundant. This change slightly optimizes the method definition without altering its functionality.
- Change single dash to double asterisks for fix description in upcoming release section
Status
READY
Description
This pull request addresses a potential race condition in the application's dependency initialization process. By introducing a Completer, it ensures that the init() method is idempotent, meaning dependencies are initialized only once, even if called multiple times concurrently. This change enhances the robustness and reliability of the application's startup sequence by providing a controlled and single-threaded initialization flow.
Type of Change