This document is from the authorized Flex curriculum written by learn the basics of building Flex applications using the Cairngorm framework. Cairngorm is based on Model View Controller (MVC) framework, specifically designed to facilitate complex state and data synchronization. These explain the Cairngorm Architecture, which is our preferred way to structure Flex applications. Below the introductory material can be found more detailed.
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The global ModelLocator object defines multiple bindable variables representing different models, and the Flex compiler may generate cairngoorm EventDispatcher objects on the class level this depends on the types of the variables.
Flex – Cairngorm Architecture Overview
You are commenting using your Facebook account. In recent years, the Flex technology has been widely used. Flex frameworks are software libraries that assist developers in building rich internet applications on the Apache Flex platform. The Delegate implementation package com.
Cairngorm Framework for Flex Developers
Sign up or log in Sign up using Google. Contains UI controls for user interaction and displays the state of the models data. It acts as a centralized repository for all data needed in the application. The Controller tier is responsible for invoking appropriate code containing the business logic of your application, which is implemented by using global FrontController and ServiceLocator classes as well as additional Command and Delegate classes.
A collaboration of recognized design patterns, Cairngorm exemplifies and encourages best-practices for RIA development advocated by Adobe Consulting, encourages best-practice leverage of the underlying Flex framework, while making it easier for medium to large teams of software engineers deliver medium to large scale, mission-critical Rich Internet Applications.
The Controller layer is implemented as a singleton FrontController. If it does not recieve an appropriate object, it must create one before passing it. In the example code, CairngormEventDispatcher dispatches the cgEvent: The Command class updates the data in the model typically, a collection of value objects defined in the global ModelLocator.
To eliminate the need to import CairngormEventDispatcher in every view, starting from Cairngorm 2. Front Controller builds the mapping between the Dispatched event and Command.
By continuing to use this website, you agree to their use. Fill in your details below or click an icon to log in: All data managed in the model should only be updated through a command or a responder object.
Flex – Cairngorm Architecture Overview | Kumar’s Blog
How did it happen? The execute method can update the central Model, as well as invoke a Service class which typically involves communication fleex a remote server.
Object; public function LoginDelegate responder: The fact that all services are located in a central place allows us to quickly reconfigure the data sources, i.
Using a centralized ModelLocator also makes multiple components dependent on the knowledge of the properties of the model. It was open sourced in the summer of To minimize the amount of manually written code, consider using Cairngen, an open source code generator for Cairngorm.
View Because each model located inside the ModelLocator is bound to a UI control, its content gets updated automatically.
Cairngorm separates business- and UI-related work into different layers, which means that the work of the project team can be split between developers responsible for the visual portion and those who are coding just the business logic of the application.
The class LoadEmployeesEvent package com. The complete frontend-logic of the RIA is encapsulated within the commands. Application developers have to write lots of boilerplate code. Responders implement the mx. Leave a Reply Cancel reply Enter your comment here An Application to Mass Classification p.
Modularizing Flex applications is one of the major ways of minimizing the size of the downloadable Shockwave Flash SWF files.
For example, employee startDate will be stored as a string and will require code to convert it to Date if any date manipulations will be needed.