"picked up from Adobe Developer guide" One of the first decisions that you must make when creating custom components is deciding whether to write them in MXML or in ActionScript. Ultimately, it is the requirements of your application that determine how you develop your custom component.Some basic guidelines include the following: MXML components and ActionScript components both define new ActionScript classes. Almost anything that you can do in a custom ActionScript custom component, you can... Read Full Story

Well there is a plugin available for using with Flex 3 (only for this version of flex).. to install follow: Start by opening Help -> Software Updates -> Find and Install. This will open up a dialogue that will let you select to either update existing features or Search for new features to install. Click the "New Remote Site" button and set Name to "Subclipse". Enter the URL http://subclipse.tigris.org/update_1.2.x and press ok. If you just go with the default checked off, you'll also need... Read Full Story

Spicebird is your one platform for many collaboration needs. It provides e-mail, calendaring and instant messaging with intuitive integration and unlimited extensibility. Very nice.. however in beta phase and needs a lot of things to be fixed or enhanced but still pretty cool... Best feature i liked is setting multiple mail box views on the home page. It gives every on a single page like widgets or gadgets on iGoogle. You can add rss feeds, multiple email views, maps, different time zone... Read Full Story

The Spry framework for Ajax is a JavaScript library that provides easy-to-use yet powerful Ajax functionality. It is designed to take the complexity out of Ajax and allow designers to easily create Web 2.0 pages. This is another beautiful development at Adobe labs... check it here. Along with Ajax wrapping up they have come up with a number of widgets and other nice UI layouts which can be integrated with other Ajax based frameworks like DOJO.. For example check this Auto suggest widget... Read Full Story

XMLHttpRequest object the heart of AJAX programming is having security implications due to its power to run code remotely using javascript. To keep the things secure you cannot use a URL in the XMLHttpRequest which is not from the domain where the javascript is executed. For example if there is a xml file news.xml at http://mydomain.com/news.xml you cannot read this xml using a javascript on a web page which is not deployed in the http://mydomain.com domain. So, same stuff holds true for... Read Full Story

In spring, Transaction attribute defines the rules for applying policies on methods. It can have one or more parameters from the following: 1. Propagation behavior 2. Isolation level 3. Read only hints 4. Transaction timeout period Propagation behavior is used to define the transaction boundaries.. Its very much inherited from EJBs transaction management. ADF Bounded task flow do have similar stuff. Spring has a much richer set of propagation behavior managment compare to EJBs. In brief... Read Full Story

ADF supports all the usual scope options as in JSF like none, requestScope, session scope and application scope. Along with these scoping options ADF supports one additional highly useful scope option that is, pageFlowScope. Let's talk about these options one by one in brief: Let's take an usecase to understand it better. Say, there is a a page 'pageA' in your application having a selectOneChoice and a submit button. On clicking the submit button it navigates you to 'pageB'. There is a bean... Read Full Story

Spring's bean has a very elaborated life cycle which gives opportunities to hook up some custom code or logic in various life cycle stages. There are two distinct spring containers one is bean factory and another is application context. Life cycle phases varies a lil in the containers. More precisely, only one additional phase is added in case of application context. Let's see what these phases are: 1. Instantiate: in this phase container finds the bean's definition and instantiates it... Read Full Story

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Spring has seven well defined modules which collaborates to deliver everything that you may need to build an enterprise application. Lets discuss one by one in brief: 1. The Core Container: This i responsible for providing fundamental services of the Spring framework. It uses powerful Inversion of control (IoC) which i discussed in previous topic to separate the bean configuration and wiring stuff from the core application logic. 2. Application Context: This modules makes spring... Read Full Story