V6 - Thread safety - PaymentMethodProvider

[araratthehero]

Description

In general Initializers should run sequentially, but it is future proof to support thread safety, in case we register factories from a different location or if in the future initializer logic change.

• Added thread safety to the PaymentMethodProvider. In a future PR we will add the same for ActionComponentProvider.
• Used ConcurrentHashMap Java class, since Kotlin does not have an equivalent. As an alternative Kotlin synchronized(lock) could be used, but we need to wrap every operation with it, which is more error prone.
• Written tests for PaymentMethodProvider, including concurrency operations.

Checklist

• Code is unit tested
• Changes are tested manually

COSDK-550

[gemini-code-assist]

Summary of Changes

Hello @araratthehero, 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 focuses on improving the robustness and reliability of the PaymentMethodProvider by introducing thread-safety measures. The core change involves migrating the internal factory storage to a ConcurrentHashMap, which inherently handles concurrent access. This enhancement is complemented by the addition of new test utilities and a comprehensive suite of unit tests, including specific concurrency tests, to ensure the stability and correctness of the changes.

Highlights

• Enhanced Thread Safety: The PaymentMethodProvider has been updated to use ConcurrentHashMap for its internal factory storage. This change ensures thread-safe registration and retrieval of payment method factories, proactively addressing potential concurrency issues, especially if factory registration patterns evolve.
• Testability Improvements: New internal utility methods, clear() and getFactoriesCount(), have been added to PaymentMethodProvider. These methods are annotated with @VisibleForTesting and are specifically designed to facilitate better control and verification of the provider's state in unit tests.
• Comprehensive Unit Testing: A new dedicated test file, PaymentMethodProviderTest.kt, has been introduced. It includes extensive unit tests covering various scenarios, most notably a concurrency test to validate the thread-safe behavior of the register method, along with tests for factory registration, retrieval, overwriting, and clearing.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in issue comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist is currently in preview and may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments to provide feedback.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request introduces thread safety to the PaymentMethodProvider using ConcurrentHashMap and includes comprehensive tests. I've provided suggestions to align the code with Kotlin idioms.

[github-actions]

✅ No public API changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud