Monthly Archives: September 2013

Sample WSDL files for WebLogic Web Services

WebLogic application server provides a vast set of policies, which allow developers to configure various aspects of Web Service behaviour: from supported message security to user authorisation rules. It all goes smoothly when you stay in Oracle space: JDeveloper integrates with your server, server integrates with…

And here you may stumble: in B2B world, the other party may well be coming from some other smooth operator. Of cause, Web Services are based on well documented standards, but how easy would it be to exactly match a set of Oracle policies to, let’s say, Microsoft WCF configuration?

To help with such tasks, we show samples of WSDL files produced by WebLogic server under a number of different security policies. Continue reading

GIF, JPEG, PNG? Examples

Continued from previous posts: GIF, JPEG, PNG? Short Answer and GIF, JPEG, PNG? Now to GIF

To finish our discussion of image formats, let’s go through some examples.

Small Icons

sample of small icon images  PNG would be the best format.

If you do not need semi-transparency, GIF format would be as good, but the size of the files may be slightly larger.

And JPEG format should not be used here: it will either distort images, or make files larger. Continue reading

GIF, JPEG, PNG? Now to GIF

Continued from previous post: GIF, JPEG, PNG? Short Answer

GIF files deserve more explanations than the other two formats, in case you wonder why we did not delved into more details on it in the previous post.

GIF colour palette

The most practically important feature of GIF format is that it stores images using no more than 256 different colours. The editor would analyse the image before saving it as a GIF file, and decide which 256 colours to keep in the file, and which colours to replace with one of those 256 colours. The the outcome usually is once of these:

  • There were less than 256 colours in the image, and it is saved without any losses of data or quality
  • Most of the space in the image is taken by only a few colours, and the rest of them are hidden in details, like edges of shapes. Some details would be lost, but you may not even notice it
  • Many colours are spread over significant areas, and GIF format would severely distort the image

Let’s look at some examples. Continue reading