Getting started with IoC - A simplified tutorial

I had mentioned about Inversion of Control (IoC) in my earlier post Inversion of Control - for easy integration. In this post I will show you how you can actually make your integration easy with implementation of a mini application sample based on IoC.

Objective
The main objective of this mini tutorial is to highlight the implementation of an interface based Inversion of Control (IoC) architecture and to state how it could help in the integration and maintenance of the application.

For this mini application I will use the following set of classes

1. Dependency - This is the interface which is implementation as per my application versions progress and which will be used by the View components in my application. In other words this is my Model component in a MVC architecture
2. Dependent - This is my View component which uses the Model component to produce the results for displaying. As the name suggests the class is dependent on the Dependency implementation.
3. Injector - This is most important class in the application and which introduces the aspect of Inversion Of Control into the applications. This class can also be referred as the configurator class.
4. Finally there can a number of implementations of the Dependency interface according to the needs of the application.

Note: This mini tutorial is based on the concept of Interface based IOC. It also assumes that you import the required classed in your Classes when compiling them.

Lets start with our tutorial.

Inversion of Control - for easy integration

You may have witnessed some of the J2EE frameworks provide a technique to get dynamically bound plain objects by making them bind to some features of the framework outside of the plain objects. This technique is called as the IoC or Inversion of Control. If we have to know about the meaning of this term let us emphasize on what inversion depicts in aspect of implementing some features in plain objects.

Overview
Suppose I have some functionality of my J2EE application in my model which is nothing but a simple POJO. Now I want this POJO to be incorporated into a web tier which is an MVC (Model View Controller) Architecture. The last thing I would want to do is modify the source of the model, view or controller and put in some additional code which would do this integration. But suppose I choose a framework in such a way that I put what exactly is to be done by the POJO in the MVC architecture in a simple XML config file and then put the config file in the framework and the framework does the rest of the integration work.

Launch of TechTracer

Hi friends,
It bring me great pleasure to announce the launch of my new technology oriented site names TechTracer. The aim of this site would be to promote new technology related concepts and tools to help you in your daily activities.

The vision for this site is to bring into light important aspects related to J2EE, AJAX, Web Services and Java Certifications since I am working in these fields.

You can access TechTracer with the URL’s http://www.techtracer.com or http://techtracer.com

Hoping to have a nice jouney in the world of technology with all you who have been reading posts in this blog and supporting with your advices. Do leave your footprints out in TechTracer too.

Snapshot of TechTracer :

Silence of the lambs

It was a movie! Yea, but this post is not its review. The title should have been silence of the blog rather!I am not sure if you have noticed something horrifying going on in this blog. No Posts for the last entire month! I am writing the posts but I am not posting them here.

Have I gone insane?
Probably not; because its sort of the plan you see :D. I am gearing up myself for the new site I am thinking for the last 2 months to jump on to. The plans are getting more strong day by day and I would continue blogging from a new place. All my written posts for this month are still waiting to see the light of the day. They are lying dormant on my hard drive and once I acquire a new domain you will be seeing a flurry of posts in a miniscule of time.

Hope you all wait until that moment.

SCDJWS - mission accomplished

The post has been moved here.

Edit: The author has moved to http://techtracer.com
All further posts will be published at the new location.

Future of Web Preview - CoolIris or Snap?

The post has been moved here.

Edit: The author has moved to http://techtracer.com
All further posts will be published at the new location.

Microsoft Office Online and its weird strategy

I wanted to try out the Microsoft Office online as I think this is the first time Micorsoft is giving a try out facility for its office products online. Microsoft is so much succumbed to its propreitary theory that when you try out the office online demo in your Firefox browser, you are shown the message that, the demo can only be viewed only in Internet Explorer 6.0 or later version.

In order to use Microsoft Office Live, you will need to have Microsoft Internet Explorer 6 or later running on Microsoft Windows 2000, Windows XP, Windows Vista, or Microsoft Windows Server 2003. You can download the latest version of Internet Explorer from the Internet Explorer downloads page.

Keen on seeing the demo I closed down Firefox and opened it in Internet Explorer and I was shocked to see what was in front of my eyes.

Apple iPhone - Tussle of the giants

The post has been moved here.

Edit: The author has moved to http://techtracer.com
All further posts will be published at the new location.

Snap Preview in WordPress Blogs

It was not a few days ago I witnessed this thing called snap preview in some websites while surfing. In the first instance I felt it was a cool concept since the preview showed up the snapshot of the actual site to which a hyperlink was pointing to. Only a mouse hover would be enough to see how the site is. I thought for a moment “Now, that’s something cool”.I thought I should try this little cool stuff in my blog. But hey, wordpress already has enabled it in my blog!

First WordPress, now Blogger - blogging gets personal

The days of the bloggers have now started to bloom. Day after day blogging is becoming as the faster and more interactive mechanism to put updated information to the web. Now people across the globe seek constantly updated information from the bloggers blogs than resorting to websites or reading magazines. This has in turn provided an incentive to the bloggers themselves as an added advantage. This not only gives continuous feedbacks from the readers but also helps them earn their living solely by the blogs themselves. Yet another advantage is that organizations come forward to the bloggers to get their products reviewed and evaluated or in terms of sponsoring the blogging activity. You may be well aware of Microsoft’s strategy of giving away free Acer Ferrari Vista powered laptops to the popular well known tech bloggers to evaluate their latest offering - Vista. There has been much hue and cry about the ethics of the bloggers opinions after this but the fact remains that blogging has taken a high leap.