ActionHandler

ActionHandler is a design pattern used in software development to encapsulate and manage user actions. It provides a structured way to process user input, such as button clicks or menu selections, by delegating the responsibility of handling these actions to specific classes or objects. The primary goal of the ActionHandler pattern is to decouple the user interface from the underlying business logic, making the code more organized, maintainable, and testable.

In this pattern, the user interface component, for instance, a button, does not directly execute the action. Instead, it triggers an ActionHandler. The ActionHandler then interprets the action and executes the appropriate logic. This separation of concerns allows for easier modification and extension of the application. If the user interface changes, the ActionHandler can remain the same, and vice versa.

There are several benefits to using the ActionHandler pattern. It promotes a cleaner code structure by centralizing action-handling logic. This makes it easier to find and debug issues related to user interactions. Furthermore, by separating the UI from the logic, developers can more easily write unit tests for the action logic without needing to interact with the graphical elements. This pattern is particularly useful in complex applications where managing a large number of user actions can become challenging.