System design flaw study #115
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Summary of ChangesHello @tusharchou, 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 introduces a new documentation file that critically analyzes a prevalent design flaw within the codebase concerning object creation. It details how the current ad-hoc approach to instantiating objects leads to tight coupling and reduced maintainability. As a strategic remedy, the document thoroughly proposes and illustrates the implementation of the Factory Method design pattern, aiming to foster a more flexible, scalable, and maintainable architecture for object instantiation. This foundational documentation is intended to guide and streamline future refactoring efforts across the Highlights
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Code Review
This pull request introduces a well-written design document that correctly identifies a design flaw in object creation and proposes the Factory Method pattern as a solution. The explanation is clear and the examples are helpful. I've added a couple of minor suggestions to improve the clarity and correctness of the Python code examples in the document.
| Declares the factory method that returns an object of an Environment class. | ||
| """ | ||
| @abstractmethod | ||
| def create_environment(self): |
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For better type safety and clarity, it's good practice to include a return type hint in the abstract method signature. Since the concrete implementations of create_environment return an Environment instance, the base method should declare this. Because the Environment class is defined after EnvironmentCreator, you should use a forward reference (a string) for the type hint.
| def create_environment(self): | |
| def create_environment(self) -> "Environment": |
| class WordleCreator(EnvironmentCreator): | ||
| """ | ||
| Overrides the factory method to return an instance of a WordleEnv. | ||
| """ |
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The docstring is slightly misleading. It states that the method returns an instance of WordleEnv, but the implementation actually returns an instance of ReformatWordleEnvironment. To avoid confusion, it's best to make the docstring accurately reflect the returned type.
| """ | |
| Overrides the factory method to return an instance of a ReformatWordleEnvironment. |
2 participants
name: Learning System with Gemini
about: By using the Factory Method, you decouple your client code from the concrete implementation of the objects it needs to create, leading to a more flexible, maintainable, and scalable design.
title: 'Docs: Propose Factory Method for Object Creation'
labels: 'documentation, design'
assignees: ''
Moon data platfrom
Describe the solution you have implemented
This pull request introduces a new document,
docs/design_flaw_and_factory_pattern.md, which identifies a key design flaw in our current object creation mechanism.The document details how the scattered and inconsistent use of
createmethods across the codebase violates core software design principles (like the Open/Closed Principle), increases coupling, and reduces maintainability.As a solution, it proposes the adoption of the Factory Method design pattern. The document provides a clear, step-by-step guide on how to implement this pattern, complete with code examples, to establish a clean, scalable, and maintainable architecture for object creation.
Describe why alternatives you considered are not optimal
The primary alternative is to continue with the current ad-hoc approach to object creation. This is not optimal for several reasons:
Additional context
This documentation is intended to serve as the foundation for a future refactoring effort to apply the Factory Method pattern throughout the
local-data-platformcodebase. By aligning on the design first, we can ensure a smoother and more consistent implementation.