CAIRNGORM FRAMEWORK TUTORIAL FLEX PDF

This document is from the authorized Flex curriculum written by learn the basics of building Flex applications using the Cairngorm framework. Flex frameworks are software libraries that assist developers in building rich internet Cairngorm is one of the primary open-source software frameworks for application Hello World Example using Cairngorm · Official Adobe Cairngorm Site. I have just constructed my first Cairngorm application: an Adobe Flex application that uses the Cairngorm application framework, implementing (For example, a user types their username and password into a login box, this.

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Now, our event is registered and tutoriial time event Connect is thrown framework will invoke the ConnectCommand. June 10, at If your project will start growing, the ModelLocator may not scale well.

It is out of scope of this weblog to give you the how to… You can read this web post on this blog Create a web service with ECC 6.

Invoke SAP web services with flex using Cairngorm framework. Register event handler and implement the business logic We need to register event frramework the Front Controller and create the Cairntorm object in order to manage the business logic. 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.

To load the employees, the Command class creates an instance of the proper delegate passing the reference to itself this is how the delegate knows where to return the data and calls the method loadEmployeesService:.

You can download the source code of this application at http: 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. Object; public function LoadEmployeesDelegate command: It allows only one-to-one mapping between events and commands.

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Flex Tutorials – Selecting the Right Flex Application Framework | Flexshishak’s Blog

In a Cairngorm Model, related data are framfwork in Value Objects VOswhile simple variables can be stored as direct properties of the ModelLocator class. This model locator stores the data and the state of this application—in particular, the variable employeeListDPwhich is tutoriap place where the list of employees is being stored. Just simply renaming this variable in the ModelLocator will require changes in one or more views that are bound to it.

However, some of the PureMVC language ports are still in alpha.

Introducing Cairngorm | Adobe Developer Connection

Create a common ancestor to all your commands and define the fault method framewprk to avoid repeating the same code in each command class. IResponder; private var service: For web services, call the method getWebService.

The IResponder interface, which is also implemented by the Command class, includes onResult and onFault methods to handle responses returned from the invoked remote service.

The Front Controller object serves as a central registry of all Cairngorm events. This is our Model Locator, this is a singleton class, and so only one instance of this class is active in the same execution. Finally, the Command class needs to make sure event. You are commenting using your Twitter account. The loadEmployeesService class reads Employees. This site uses cookies.

Now go into the source mode and add the script content as shown below: Cairngoorm private function onConnect: Instead of going by the straight forward way of calling required methods using Application. You can quickly reuse the AS classes that have already been created and string them up using the event maps.

Software architecture Free computer libraries. For this tutorial we need two views: More information are available on this blog Add crossdomain. This object is very simple right now and it is not in scope of this tutorial to perform any other development.

Development managers who have to work with distributed teams of beginner or mid-level Flex developers and need a safety net to split the project work into smaller controllable tasks e. The Command class then processes the event by running the Command class’ execute method, which is an ICommand interface method.

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Using a centralized ModelLocator also makes multiple components dependent on the knowledge of the properties of the model. The business folder is for delegates and service components. The class LoadEmployeesEvent package com. Search or use up and down arrow keys to select an item. The problem with this approach is in the global nature of such an event handler. It is not only a framework, but also an approach to organizing and packaging code, components, and a method to achieve separation of concerns i.

Open Welcome view in design mode and create a button and associate function onConnect to the onClick event as show below: In desing mode create a new DataGrid as shown below: Our parameters are also assigned everytime the event is dispatched, eliminating the need for parameters to be fetched in a Cairngorm Command. ICommandIResponder mx. We are ready to execute our application. All content here are my personal views and not those of my employer.

This post explains how you pass parameters to a Cairngorm command at runtime, via a Cairngorm Event.

Flex Cairngorm – Interacting with a Command, through an Event

The event object may include additional data if required by the developer. It allows separate responsibilities of developers. The global ModelLocator cxirngorm defines multiple bindable variables representing different models, and the Flex compiler may generate additional EventDispatcher objects on the class level this depends on the types of the variables. Feel free to post in any questions. Suppose you have 10 flxe String variables in the ModelLocator. Online, you may encounter lots of debate regarding whether Cairngorm should be used in Flex projects.