Design pattern framework on top of PureMVC.

The PureMVC framework has a very narrow goal. That is to help you separate your application’s coding interests into three discrete tiers: Model, View and Controller.

This separation of interests, and the tightness and direction of the couplings used to make them work together is of paramount importance in the building of scalable and maintainable applications.

In this implementation of the classic MVC Design meta-pattern, these three tiers of the application are governed by three Singletons (a class where only one instance may be created) called simply Model, View and Controller. Together, they are referred to as the ‘Core actors’.

A fourth Singleton, the Facade simplifies development by providing a single interface for communication with the Core actors.

The Model simply caches named references to Proxies. Proxy code manipulates the data model, communicating with remote services if need be to persist or retrieve it.

This results in portable Model tier code.

The View primarily caches named references to Mediators. Mediator code stewards View Components, adding event listeners, sending and receiving notifications to and from the rest of the system on their behalf and directly manipulating their state.

This separates the View definition from the logic that controls it.

The Controller maintains named mappings to Command classes, which are stateless, and only created when needed.

Commands may retrieve and interact with Proxies, send Notifications, execute other Commands, and are often used to orchestrate complex or system-wide activities such as application startup and shutdown. They are the home of your application’s Business Logic.

The Facade, another Singleton, initializes the Core actors (Model, View and Controller), and provides a single place to access all of their public methods.

By extending the Facade, your application gets all the benefits of Core actors without having to import and work with them directly. You will implement a concrete Facade for your application only once and it is simply done.

Proxies, Mediators and Commands may then use your application’s concrete Facade in order to access and communicate with each other.

PureMVC applications may run in environments without access to Event and EventDispatcher classes, so the framework implements an Observer notification scheme for communication between the Core MVC actors and other parts of the system in a loosely-coupled way.

You need not be concerned about the details of the PureMVC Observer/Notification implementation; it is internal to the framework. You will use a simple method to send Notifications from Proxies, Mediators, Commands and the Facade itself that doesn’t even require you to create a Notification instance.

Install Ruex:

cargo add ruex

• Manual, Docs, etc
• Samples
• Apps using Angular Rust
• Articles Featuring Angular Rust
• The Catalog of Design Patterns
• Design patterns card

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