Visitor – You prefer to use another framework, but maybe Cairngorm 3 has For example, the Command pattern is still recommended for encapsulating the. Cairngorm is based on Model View Controller (MVC) framework, specifically designed to facilitate complex state and data synchronization. The Current State of Flex Frameworks In this tutorial you will learn a few “best- practices” for Cairngorm projects as well as an extension to the.
|Published (Last):||13 March 2010|
|PDF File Size:||17.97 Mb|
|ePub File Size:||6.17 Mb|
|Price:||Free* [*Free Regsitration Required]|
Agile Enterprise Application Development with Flex by Tony Hillerson
The business folder is for delegates and service components. Read Chapters 2and 6and then decide whether you prefer working with the components described there or one of the architectural MVC frameworks. To learn the expanded Cairngorm Flow, you will need to learn a few new Cairngorm elements. David also recently completed the AIR 1. 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.
We prefer working with frameworks that offer enhanced Flex components rather than just separation of work among team members. 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.
View Because each model tutlrial inside the ModelLocator is bound to a UI control, its content gets updated automatically. The IResponder interface, which ttutorial also implemented by the Command class, includes onResult and onFault methods to handle responses returned from the invoked remote service. Suppose you have 10 [Bindable] String variables in the ModelLocator. The event object may include additional data if required by the developer.
This design pattern will be used in Part 2 as well, so it is assumed that you are familiar with the concepts in Part 1 of the tutorial.
Modularizing Flex applications is one of the major ways of minimizing the size of the downloadable Shockwave Flash SWF files. The Command tuhorial package com.
Command When a View component fires an event, FrontController finds the Command class that was registered with this event and calls its method execute. If this application has been built using Frmaework, each of these modules becomes dependent on the central FrontController located in the main. I am certainly open to corrections if you see that I have made an error on this project.
ServiceLocator can be used not only as a repository of all services, but also as an authorization mechanism that restricts access to certain application services based on specified credentials. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more. It offers a number of classes implementing Model, View, and Controller tiers, tutoriwl interaction between them. To eliminate the need to import CairngormEventDispatcher in every view, starting from Cairngorm 2.
It requires developers to write lots of additional classes, which adds to project timeline. Cairngorm is one of the primary open-source software frameworks for application architecture in Adobe Caringorm. In Part 1I discussed the basic implementation and use of the ModelLocator pattern. The SaveEmployeeEditsEvent event is dispatched: 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 loadEmployeesService class reads Employees. See its methods setCredentials and setRemoteCredentials for details. 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. It aims at greatly simplifying the development of RIA applications through client-side data management, real-time messaging, transparent lazy-loading, paged queries, code generation and other features.
Bart’s Blog: Excellent tutorial on Cairngorm framework
The execute method can update the central Model, as well as invoke a Service class which typically involves communication with a remote server. ModelLocator The Command class updates the data in the model typically, a collection of value objects defined in the global ModelLocator. However, before you can properly implement this design pattern you framewodk to learn about the organization of a Cairngorm project.
The framework design is based on singletons, which leads to tight object coupling. The role of the View layer in a Cairngorm application is to throw events and bind to data stored in the Model. As with all of the tutorials that will come in this series, this lesson has two parts.
You will need an FLV player to view them.