Thick, Thin and Ultra-thin client technology explained
Before we developed Omnis Web Client Technology, Omnis could only deliver “thick client” applications – these are applications that can only be accessed by end-users on the desktop or local network and require the Omnis Studio runtime (a cut-down version of the full Omnis Studio executable) in order to run.
In 1999, we developed the Omnis thin client to address the growing need for end users to access information via local networks and the internet. There are many advantages in the use of Web-enabled applications including the ability to install, update and maintain such applications without installing software on hundreds or even thousands of end-user’s computers.
Web applications also remove or neutralize many platform considerations or incompatibilities often found with desktop applications. Web applications only need to support common Web browsers such as Internet Explorer, Firefox, and Safari, under the most widely used platforms; namely Windows, Mac OS X and Linux – if your Web interface supports all of these browsers and platforms, then in effect so does your application.
To access an Omnis Thin Client application, a relatively small one-off download is required in order to install the Web Client plug-in (an ActiveX component for Internet Explorer browsers or a Netscape type plug-in for other browsers including Firefox and Safari). This can be performed either by end-users themselves or can be controlled by a company’s IT department.
A simple script can also be used in your HTML page to load the correct type of plug-in for the current browser and platform. The Web Client code can be embedded in a simple HTML wrapper (like any browser plug-in) using the <object> or <embed> tag.
Once the plug-in is installed, no further software is required (in fact the Omnis Web Client plug-in updates itself once installed). As with all Web applications, the main application is located on the web server and can be updated as many times as the developer likes, and end-users will “see” any modifications the next time they access the application.
The Omnis Web Client provides a rich environment for you to build Web applications and a more interactive experience for your end users than plain HTML. The Web Client itself is a browser plug-in capable of presenting a complete application window as a single form (remote form class) within the user’s browser. Web applications delivered in the Web Client plug-in look and behave just like desktop applications.
The Omnis Web Client, or more specifically the Omnis remote form, could be considered as a “black box” in the sense that the end user cannot get “inside” the application or form that is presented in their browser.This provides security benefits since the end-user cannot reveal any substantial source code and the plug-in itself cannot be attacked or compromised, providing the server hosting the application is protected in the proper way.
The Omnis ‘Ultra-thin Client’ is distinguished from the the ‘Thin Client’ as it uses only standard HTML, buttons forms and entry fields to interface with the Web application, thus no browser plug-in is required to access an ultra-thin web client application. Each time the end-user accesses your web page, a new copy of the page is sent to the browser.
Both the ultra-thin and thin client techniques can be achieved using the same integrated development environment in Omnis, and neither application interface should be considered better than the other, rather- they are suited to different tasks. Indeed, some real-world applications may employ both techniques for different parts of the application. Add to these different Web capabilities in Omnis, the ability to connect to all major databases and to deploy across all platforms (Windows, Mac OS X, Linux), then hopefully you’ll agree that Omnis Studio is a very flexible and versatile development environment for creating Web applications.
Pros and Cons of using Ultra-thin
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Pros and Cons of using Web Client?
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