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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To Use or Not to Use Cairngorm? In recent years, the Flex technology has been widely used. See its methods setCredentials and setRemoteCredentials for details. Enter your email address to subscribe cairngogm this blog and receive notifications of new posts by email. Model Locator carries all the transport information between the components It is a Bindable object; Service Locator defines the interface to communicate with datasource Httpservice, Webservice,Remoteobject.
If it does not recieve an appropriate object, it must create one before passing it. Although keeping all application events in one place simplifies their maintenance, it leads to tighter coupling of the application cirngorm.
If this application has been built using Cairngorm, each of these modules becomes dependent on the central FrontController located in the main. How to glue this junk together? Is there any way simplify it? Even though data binding can help in writing less code, because Cairngorm enforces data binding as the only mechanism of updating the views, it makes them nonreusable.
Agile Enterprise Application Development with Flex by Tony Hillerson
A value object is a class that only has properties to store values. Implemented as a singleton, it contains references to all services an application will use. Sign up or log in Sign up using Google. AppModelLocator; [Bindable] private var model: To load the employees, the Command class creates an instance of the proper delegate passing the framewlrk to itself this is how the delegate ftamework where to return the data and calls the method loadEmployeesService:.
Csirngorm Mechanics and Materials Volumes Software architecture Free computer libraries. It should only pass strongly typed value objects to a responder. PureMVC is a framework for creating applications based upon the well-established model—view—controller design pattern. Meanwhile, keep these observations about Cairngorm in mind:.
The fact that all services are located in a central place allows us to quickly reconfigure the data sources, i.
You are commenting using your Facebook account. Cairngorm makes the application development layable, testable. Business Delegates form an abstraction layer between the server-side services and the main frontend application. If you have to develop a project without experienced Flex fra,ework on your team, however, Cairngorm can give your project a structure that will prevent fex from failing.
The Model tier is represented by the class ModelLocatorwhich stores the application-specific data these are often collections of value objectsa. When a View component fires an event, FrontController finds the Command class that was registered with this event and calls its method execute.
Apache Flex – A Practical Guide: Introduction to MVC Architecture of Cairngorm
This model locator stores the data and the state of this application—in particular, the variable employeeListDPwhich is the place where the list of employees is being stored. The Command class updates the model. Fill in your details below or click an icon to log in: To minimize the amount of manually written code, consider using Cairngen, an open source code generator for Cairngorm.
The result will be responded in the result method of The command, the model will be updated and binded to the result view: You are commenting using your WordPress.
Email required Address never made public. Obviously it is a mapping house of event and command. I had gone through many documents, no where mentioned how cairngorm framework works internally, means, how cairngorm Event, frontController, BusinessDelegate,ServiceLocator,Commands works and frxmework we are extending or implementing cairngorm class like ICommand, IResponder and cairngormEvent. The business layer retrieves data from the servers and stores it in the memory objects that represent the data model, which use binding to notify the UI components about data arrival or changes.
You vlex download the source code of this application at http: Front Controller builds the mapping between the Dispatched event and Command. It’s extensions for Parsley. Adobe Flex Master Lu.
Flex MVC-Cairngorm « Thinking in Java And Flex
The improved version of the Cairngorm framework is more suitable for Web application development and maintenance. From Wikipedia, the free encyclopedia. By using these callbacks the delegate will return to the command class the result or error information of the execution of the command in question.
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Rich Internet Application White Paper. Both of which has awesome documentation and a very active community. 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 caigngorm as additional Command and Delegate classes.