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In software architecture, cross-cutting concerns such as logging, security checks, and transaction management often need to be applied across multiple components. A naive approach involves manually inserting logic into every business method, leading to code duplication and tight coupling. For instance, if we need to audit execution before and a ...

Inversion of Control and Dependency Injection Inversion of Control (IoC) functions as an architectural principle rather than a concrete implementation pattern. Its primary objective is to decouple object creation and dependency resolution from business logic by delegating these responsibilities to a dedicated container. Dependency Injection (DI ...

Design patterns are typical solutions to common problems in software design. They represent best practices used by experienced object-oriented software developers. Categories of Design Patterns Creational Patterns These patterns abstract the instantiation process, focusing on how objects are created in a flexible and reusable manner. Factory M ...

The Single Responsibility Principle states that a class should have only one reason to change. This means each class or interface should focus on a single functionality. Problem Scenario: If a class handles multiple responsibilities, modifying one responsibility might inadvertently affect the other, increasing the risk of bugs. Key Benefits: R ...

The human-array computer is undoubtedly one of the most stunning scenes in The Three-Body Problem. In the novel, "von Neumann" organized three soldiers into each gate component, ultimately mobilizing thirty million soldiers of "the First Emperor" to form a colossal computer of ten million gate parts, all in an attempt to sol ...

Limitations of Simple Factory Pattern The Simple Factory pattern successfully separates object creation from business logic, but it violates the Open-Closed Principle. This principle states that software entities should be open for extension but closed for modification. Consider a scenario where you need to add a new monster type called Beast. ...

In our previous discussion of the Simple Factory pattern, we created a single factory that produced different types of products. Today, we'll explore how this evolves into the Factory Method pattern. Imagine our business has grown, and instead of having one factory that produces multiple types of vehicles, we now want specialized factories, eac ...

Behavioral patterns define how objects interact and ditsribute responsibilities. The Strategy pattern encapsulates algorithms within interchangeable objects, enabling runtime selection of difefrent behaviors. Pattern Components The Strategy pattern consists of three core elements: Strategy Interface: Defines the common contract for all algorit ...

The Chain of Responsibility pattern is a behavioral design pattern that decouples the sender of a request from its receiver by giving multiple objects a chance to handle the request. These objects are linked into a chain, and the request travels along this chain until one of the handlers processes it. This approach allows you to add or modify h ...

The Observer pattern establishes a one-to-many dependency between objects. When the state of a single "subject" (the observable) changes, all registered "observers" are notified and updated automatically. This decoupling allows the subject to broadcast changes without needing to know the specific implementation details of it ...