For the love of GOD, don’t use Cairngorm (2) as a framework. Use either RobotLegs or Parsley. Both of which has awesome documentation. These explain the Cairngorm Architecture, which is our preferred way to structure Flex applications. Below the introductory material can be found more detailed. In recent years, the Flex technology has been widely used. Adobe Flex application framework designed to start introduction of the Cairngorm framework.
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Flex – Cairngorm Architecture Overview
A responder recieves the result of a service call and implements frontend-logic like a command. The business folder is frameworl delegates and service components. Sign up using Facebook. For example, you have to create additional event and command classes for every event that can be dispatched in your application.
The modern frameworks work by watching the display list un Views that you’re interested in to be added to the stage, then supplying them with dependencies according to rules you set up. In a Cairngorm Model, related data are stored in Value Objects VOswhile simple variables can be stored as direct properties of the ModelLocator class. The improved version of the Cairngorm framework is more suitable for Web application development and maintenance.
flex – How cairngorm framework works internally – Stack Overflow
It requires developers to write lots of additional classes, which adds to project timeline. The author, after a careful study of the entire framework, has made some improvements on the Cairngorm framework of service call mechanism, which proposed the Cairngorm framework of improved. The following list shows the different elements that form the framework.
All data managed in the model should only be updated through a command or a responder object. Notify me of new comments via email. It offers a number of classes implementing Model, View, and Controller tiers, and interaction between them.
Cairngorm Framework for Flex Developers. Please note that as ActionScript 3 does not support private constructors, the public constructor of this class throws an error if someone tries to improperly instantiate it i. It directly may set values of the model and should only deal with strongly typed value objects.
A static reference to the ModelLocator singleton instance is used by the View layers to locate the required data.
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 framrwork method loadEmployeesService:. The complete frontend-logic of the RIA is encapsulated within the commands. To eliminate the need to import CairngormEventDispatcher in every view, starting from Cairngorm 2.
Cairngorm is one of the primary open-source software frameworks for application architecture in Adobe Flex. The fact that all services are located in a central place allows us to quickly reconfigure the data sources, i. An Application to Mass Classification fraamework.
The locate the required service in the Service Locator, call the given method on it and route the response back to a responder object. On the application startup, the code dispatches LoadEmployeesEvent and, as if by magic, the EmployeeList gets populated from Employees. It extends the Cairngorm FrontController class and maps the dispatched events to its corresponding commands. This class creates an event with an ID AppController.
The loadEmployeesService class reads Employees. It allows separate responsibilities of developers. Notify me of new posts via email. Lu Gao, Li Yong Zhou.
Adobe Flex application framework designed to start introduction of the Cairngorm framework. Because each model located inside the ModelLocator is bound to a UI control, its content gets updated automatically. You are commenting using your Facebook account. The execute method can update the central Model, as well as invoke a Service class which typically involves communication with a remote server.
The framework design is based on singletons, which leads to tight object coupling. By using these callbacks the delegate will return to the command class the result or error information of the execution cramework the command in question. The free, open source framework was originally implemented in the ActionScript 3 language for use with Adobe FlexFlash and AIRand it has since been ported to nearly all the major web development platforms.
The method execute must have an argument—the instance of the CairngormEvent object that may or may not encapsulate some application data for example, some value object that is not used in our scenario.