CAIRNGORM ARCHITECTURE IN FLEX PDF

Wednesday, June 16, Flex Cairngorm architecture Cairngorm is an implementation of several design patterns that form a lightweight architectural framework. Design patterns offer specific solutions for specific problems and when a collection of patterns regularly collaborate with one other, their assembly is for the greater good of a greater aim. You call this collection into a higher order a microarchitecture. In general, it offers developers a starting point for some technical architecture that is generic enough to apply in most cases to complex applications. Cairngorm architectural framework Cairngorm follows the principle of seperating the view and business logic which is known as the Model-View-Controller pattern MVC. The following list shows the different elements that form the framework.

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Friday, February 20, Flex - Cairngorm architecture overview Cairngorm is an implementation of several design patterns that form a lightweight architectural framework. Design patterns offer specific solutions for specific problems and when a collection of patterns regularly collaborate with one other, their assembly is for the greater good of a greater aim. You call this collection into a higher order a microarchitecture. In general, it offers developers a starting point for some technical architecture that is generic enough to apply in most cases to complex applications.

Cairngorm architectural framework Cairngorm follows the principle of seperating the view and business logic which is known as the Model-View-Controller pattern MVC.

The following list shows the different elements that form the framework. Also check out the Cairngorm diagram for a graphical overview of the components. View - The main. It contains UI controls for user interaction and displays the state of the models data.

Views dispatch events handled by the controller. Model Locator - It acts as a centralized repository for all data needed in the application. It manages the view an is declared as [Bindable] to use all variables for data binding in the view. It must be implemented as a singleton which implements the Cairngorm IModelLocator.

All data managed in the model should only be updated through a command or a responder object- Value Object - A value object is a class that only has properties to store values. It contains no methods or logic an acts as a pure data container.

Value objects must implement the Cairngorm ValueObject interface. By doing so, Flex automatically converts an server-side object returned through remoting or data service interaction to its corresponding ActionScript object. Event - In Cairngorm everything should be mapped to an event.

Whenever the user interacts with the view or an action occurs an event must be dispatched. Custom events extend the CairngormEvent class an have a special property to contain the data that comes with it. Command - Commands actually do the majority of an applications work. They recieve the event and its data, execute the logic an can change the workflow state of the model and view.

Each command must implement the Cairngorm ICommand interface and its execute function. The revcieved event is a generic CairngormEvent and must be casted to the appropriate custom event first. The complete frontend-logic of the RIA is encapsulated within the commands. Front Controller - It extends the Cairngorm FrontController class and maps the dispatched events to its corresponding commands. Therefore it has two methods: the constructor and an initialize method which will map an event to an command via the addCommand method.

The controller is instantiated directly in the main. You simply need to add the directory your class is in as an XML Namespace and then include the tag in the file. Service Locator - Implemented as a singleton, it contains references to all services an application will use. Like the Front Controller, it is placed within the main. Business Delegate - Business Delegates form an abstraction layer between the server-side services and the main frontend application.

The locate the required service in the Service Locator, call the given method on it and route the response back to a responder object. 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: it must have at least two properties, one named reference to the ServiceLocator and one reference to a responder, both set in the constructor.

And it must have implemented one method for each server-side method to be called. The delegate is created within a command object. It should only pass strongly typed value objects to a responder. If it does not recieve an appropriate object, it must create one before passing it. Responder - Responders implement the mx. IResponder interface.

A responder recieves the result of a service call and implements frontend-logic like a command. It directly may set values of the model and should only deal with strongly typed value objects.

It Accepts the service requests from the RIA and responds back data. 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, so it can interact with them as if they are created by script.

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Friday, February 20, Flex - Cairngorm architecture overview Cairngorm is an implementation of several design patterns that form a lightweight architectural framework. Design patterns offer specific solutions for specific problems and when a collection of patterns regularly collaborate with one other, their assembly is for the greater good of a greater aim. You call this collection into a higher order a microarchitecture. In general, it offers developers a starting point for some technical architecture that is generic enough to apply in most cases to complex applications. Cairngorm architectural framework Cairngorm follows the principle of seperating the view and business logic which is known as the Model-View-Controller pattern MVC.

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FLEX CAIRNGORM PDF

Meztizahn The author of PureMVC wanted to make this framework portable to other languages; hence standard Flash events are not used in the framework, even though Architeture developers still can use regular events to process, say, button clicks. Enter your email address to subscribe to this blog and receive notifications of new posts by email. The business folder is for delegates and service components. All data managed in the model should only be updated through a command or a responder object. When the user makes a selection, the product component sends an event carrying the selected product to the mediator e. Commands actually do the majority of an applications work.

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CAIRNGORM ARCHITECTURE IN FLEX PDF

Vudotilar If you are looking for an example, here it is, http: Saturday, July 2, serach index in flex. The SaveEmployeeEditsEvent event is dispatched: Create a user called dba with the password sql and grant this user full access to the test database. You may spend a day or two with the manuals. Instead of going by the straight forward way of calling required methods using Application.

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Fek 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: You are commenting using your WordPress. Email required Address never made public. An advanced logger Eclipse plug-in that is built on top of the Flex logging API but automates and make the logging process more flexible and user-friendly. You need to persist it in a medium that survives computer reboots and electrical blackouts. The delegate is created within a command object. It also implements the interface IResponderwhich requires you to add the result architevture fault methods.

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