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 IResponder interface, which is also implemented by the Command cirngorm, includes onResult and onFault methods to handle responses returned from the invoked remote service. By using this site, you agree to the Terms of Use and Privacy Policy. The business folder is for delegates and service components. In the example code, CairngormEventDispatcher dispatches the cgEvent: Cairngorm 3 isn’t based on Parsley.

Flex MVC-Cairngorm « Thinking in Java And Flex

It must be implemented as a singleton which implements the Cairngorm IModelLocator. If one of them will get updated, not only will its listener get notified to update the view, but the other 9 will get this event, too. Software architecture Free computer libraries. For the love of GOD, framewrk use Cairngorm 2 as a framework.

Agile Enterprise Application Development with Flex by Tony Hillerson

Model Locator carries all the transport information between the components It is a Bindable object. Cairngorm was designed to ensure that UI components do not need to know where data is located. The fact that all services are located in a central place allows us to quickly reconfigure the data sources, i. The controller is instantiated directly in the main.

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flex – How cairngorm framework works internally – Stack Overflow

The Command class then processes the event by running the Command class’ execute method, which is an ICommand interface method. Flex felx are software libraries that assist developers in building rich internet applications on the Apache Flex platform. A flez object is a class that only has properties to store values. The View portion of the employee list gets updated automatically as a result of data binding.

Cairngorm is based on the MVC model. It Accepts the service requests from the RIA and responds back data.

Cairngorm Framework for Flex Developers

This site uses cookies. A responder recieves the result of a service call and implements frontend-logic like a command. 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.

Have you noticed that the Command class has also reached for the AppModelLocator to be able to update the model?

It was developed by iteration:: The command has to do the business: The FrontController instance, which receives every View-generated event, dispatches the events to the assigned Command class based on the event’s declared type. Cairngofm Framework for Flex Developers p. Views Read Edit View history. To eliminate the need to import CairngormEventDispatcher in every view, starting from Cairngorm 2.

The fact that Cairngorm is built around a Command pattern with a centrally located command repository can be very convenient for some projects that require audit or undo functionality. 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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To find out more, including how to control cookies, see here: 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 Command implementation package com. Frameork Delegate implementation package com. Meanwhile, keep these observations about Cairngorm in mind:. The next point of interest is the class LoadEmployeesCommand.

In recent years, the Flex technology has been widely used.

Notify me of new comments via email. They recieve the event and its data, execute the logic an can change the workflow state of the model and view.

Because each model located inside the ModelLocator is bound to a UI control, its content gets updated automatically. Implemented as a singleton, it contains references to all services an application will use.

Applied Mechanics and Materials Volumes By clicking “Post Your Answer”, framewori acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Stack Overflow works best framewori JavaScript enabled. The execute method of SaveEmployeeEditsCommand does not use any delegates, as it just needs to add a newly inserted Employee to the model.

You are commenting using your WordPress. Sorry, your blog cannot share 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.