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 complete frontend-logic of the RIA is encapsulated within the commands. And make the developer more professional Geek J. Modularizing Flex applications is one of the major ways of minimizing the size of the downloadable Shockwave Flash SWF files. Cairngorm was designed to ensure that UI components do not need to know where data is located. If your project will start growing, the ModelLocator may not scale well. ModelLocator The Command class updates the data in the model typically, a collection of value objects defined in the global ModelLocator.
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It contains no methods or logic and acts as a pure data container. Sign up or log in Sign up using Google. Meanwhile, keep these observations about Cairngorm in mind:.
Suppose you have 10 [Bindable] String variables in the ModelLocator. Leave a Reply Cancel reply Enter your comment here The Model tier is represented by the class ModelLocatorwhich stores the application-specific data these are often collections of value objectsa. A static reference to the ModelLocator singleton instance is used by the View layers to locate the required data. This page was last edited on 25 Decemberat The execute method of SaveEmployeeEditsCommand does not use any delegates, as it just needs to add a newly inserted Cairngoem to the model.
Commands actually do the majority of an applications work. The command has to do the business: Whenever the user interacts with the view or an action occurs an event must be dispatched. Cairngorm Framework for Flex Developers p.
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.
To minimize the amount of manually written code, consider using Cairngen, an open source code generator for Cairngorm. The Command class then processes the event by running the Command class’ execute method, which is an ICommand interface method.
Please look around if you live in a cage J. It should only pass strongly typed value objects to a responder. By doing so, Flex automatically converts an server-side object returned through remoting or data service interaction to its corresponding ActionScript object. Fill in your details below or click an icon to log in: The execute method can update the central Model, as well as invoke a Service class which typically involves communication with a remote server.
Use either RobotLegs or Parsley.
All articles with dead external links Articles with dead external links from December Articles with permanently dead external links Pages using Infobox software with unknown parameters. Cairngorm Framework for Flex Developers. 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.
Adobe launched the Cairngorm application development framework. Sorry, your blog cannot share posts by email.
The controller is instantiated directly in the main. The delegate is created within a command object.
Leave a Reply Cancel reply Enter your comment here How to glue this junk together? It also implements the interface IResponderwhich requires you to add the result and fault methods. The Cairngorm framework is the mainstream framework for Flex application development, the framework is based on the MVC design pattern, acirngorm simplifies the application development model. Somehow almost all the service return information should have an object in the Model locator. It must be implemented as a singleton which implements the Cairngorm IModelLocator.
Cairngorm has been around longer than any other Flex framework.
But it is complicate and hard to study and maintain. Using a centralized ModelLocator also makes multiple components dependent on the knowledge of the properties of the model. Because each model located inside the ModelLocator is bound to a UI control, feamework content gets updated automatically.