JAVAERO – The Javaero held it’s fourth seminar last November 17, 2006 featuring topics in eclipse framework and performance theory. Oliver Yanto presented to the group how to extend eclipse capabilities using the plugin development tool. On the first part of the presentation he covered on the design of eclipse, the parts of a workbench and the plugin development environment. The second part was spent on a demonstration of an actual plugin which he coded especially for this presentation.
Mr. Yanto called his plugin the ImageViewer. It has the capability to view images on the workspace by right-clicking on the filename and choosing view image.
The plugin will open a new window that will display the image at the center. At the top of this image is arrows that point to the left and right. Below the image is a small region which gives a preview of three images. At the center you will see the current image being viewed, the left and right images correspond to the images that will appear on the image region when you click on the right and left arrows on top.
The second topic of the seminar was presented by Bobby Corpus. He showed the theoretical basis of the 2/3 design rule for computer systems performance. He also showed why performance degrades when utilization approaches 100%. A table of values showed how this degradation is very non-linear. Scaling effect was also demonstrated by comparing the capacity of a given server to a twice-as-fast server. It was shown that you can load the faster server up to 3 times it’s capacity while still maintaining the same level of service provided by the slower server.
The next seminar will discuss the hard-core approach to AJAX and some useful plugins of Maven.
