One of the biggest problems in an enterprise is deploying the application.
Usually you have to deliver a new release of your application to several
hundred workstations. This may be a time-consuming and very cost-intensive
Think of rolling out the newest and coolest version of the order application
of your enterprise: this superior version has so many new functionalities
that your users will love it.
When we think about rolling out a new version, we must keep a few things in
mind: The cool new version has to be packed for distribution. Database
conversion scripts have to be given to one or more DBA. Distribution has to
take place. The development team should be available during roll out. Let's
have a closer look at these points.
We'll have a few new tables that have to be deployed into the production
system. And we may also have some store... (more)
Most of the applications we software developers build need to interact
somehow with data from a database. The .NET Framework defined by Microsoft
provides a rich set of objects to manage database interaction; these classes
are collectively referred to as ADO.NET and the latest versions of DataWindow
.NET (which is now version 2.01).
SQL Anywhere (version 10) fits perfectly in this environment, making
development a lot easier; in addition, your applications will look good
without spending a lot of time painting the user interface. In this article
we'll look closer at exactly this... (more)
The Web Services Description Language (WSDL) makes it possible for automated
code-generation tools, like PowerBuilder 9 with its Web services wizard, to
simplify building clients for existing Web services.
In my previous article "Axis" (PBDJ, Vol. 9, issue 8) we discussed the basic
steps involved in implementing a Web service using Axis, EAServer, and
PowerBuilder 8. Now we'll explore the technologies that make it easier to use
Web services that have already been deployed.
What Is WSDL?
WSDL is an XML-based language used to define Web services and describe how to
access them. For... (more)
"Web services are a new breed of Web application. They're self-contained,
self-describing, modular applications that can be published, located, and
invoked across the Web. Web services perform functions, which can be anything
from simple requests to complicated business processes. A sample Web service
might provide stock quotes or process credit-card transactions. Once a Web
service is deployed, other applications (and other Web services) can discover
and invoke the deployed service."
-IBM's Web Services Tutorial
The World Wide Web is mostly used as a source of information - the w... (more)
Have you ever looked at a rainbow and wondered how all the colors got there?
Or wondered why grass looks green and your jeans blue? Well, if you sit in
front of your computer as often as I do, you might not.
However, the following problem may have occurred: you want to create a cool
window in which the data and the headers are displayed in different colors,
but you can't find the right one. If you've come across this situation
before, then this article is right for you.
What Is Light?
Let's discuss a bit of physics. If you look at a cool DVD movie, you hear
sound and see pictures... (more)