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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A static reference to the ModelLocator singleton instance is used by the View layers to locate the required data. The Command implementation package com. Retrieved from ” https: 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.
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Cairngorm Framework for Flex Developers
All data cramework in the model should only be updated through a command or a responder object. Views dispatch events handled by the controller.
View Because each model located inside the ModelLocator is bound to a UI control, its content gets updated automatically. You are commenting using your WordPress.
The following list shows the different elements that form the framework. Cairngorm is one of the primary open-source software frameworks for application architecture in Adobe Flex. The revcieved event is a generic CairngormEvent and must be casted to the appropriate custom event first. It allows only one-to-one mapping between events and commands.
They recieve the event and its data, execute the logic an can change the workflow state of the model and view. A responder recieves the result of a service call and implements frontend-logic like a command.
Cairngorm Framework for Flex Developers
It aims at greatly simplifying the development of RIA applications through client-side data management, real-time messaging, transparent lazy-loading, paged queries, code generation and other features.
The global ModelLocator object defines multiple bindable variables representing different models, and the Flex compiler may generate additional EventDispatcher objects on the class cairngrom this depends on the types of the variables.
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It offers a number of classes implementing Model, View, and Controller tiers, and interaction between them. Read Chapters 2and 6and then decide whether you prefer working with the components described there or one of the architectural MVC frameworks.
It is part of the Adobe Engagement Platform. This leads to the need for additional coding to convert the data to appropriate types. With a remoting technology like BlazeDS it is even possible to pass back value objects witch are transformed to their corresponding ActionScript objects in the application, fdamework it can interact with them as if they are created by script.
It was developed by iteration:: Meanwhile, keep these observations about Cairngorm in mind:. Stay ahead with the world’s most comprehensive technology and business learning platform.
The framework with the MVC design pattern to simplify the application development frameeork, specification of the application development process, and pay more attention to the business logic, the author after careful study of the entire framework, the control layer of the Cairngorm framework is made some improvements to the improved version of the Cairngorm framework.
Because this application does not save modified data anywhere other than in memory, no other ser vice calls are made to pass the changed data to the server side for persistence. It’s extensions for Parsley. Cairngorm follows the principle of separating the view and business logic which is known as the Model-View-Controller pattern MVC.
Please note the use of four global objects: You are commenting using your Twitter account. The FrontController instance, which receives every View-generated event, dispatches the events to the assigned Command class based on the event’s declared type. Custom events extend the CairngormEvent class an have a special property to contain the data that comes with it. You simply need to add the directory your class is in as an XML Namespace and then include the tag in the file.
Flex – Cairngorm Architecture Overview | Kumar’s Blog
This is my architecture diagram: If you have to develop a project without experienced Flex developers on your team, however, Cairngorm can give your project a structure that will prevent it from failing. Unlike the other elemente in the Cairngorm architecture, it does not extend a class or implement an interface, but it need to follow some guidelines: IResponder; private var service: See its methods setCredentials and setRemoteCredentials for details.
ServiceLocator can be used not only as a repository of all services, but also as an authorization mechanism that restricts access to certain application services based on specified credentials. By doing so, Flex automatically converts an server-side object returned through remoting or data service interaction to its corresponding ActionScript object.
To load the employees, the Command class creates an instance of the proper delegate passing the reference to itself this is how the delegate knows where to return the data and calls the method loadEmployeesService:.
The Controller is the most sophisticated part of the Cairngorm architecture. The other view work flow is similar to the above… The FB Project structure like: It analyzes general system architecture and application developing frameworks and puts them into practice. Adobe Flash Media Server.