By Oliver Sims
An cutting edge examine how companies can take advantage of using object-orientation to client/server platforms. in addition to concentrating on the construction of software program within the kind of CBOs, the ebook sincerely explains the permitting layer of "middleware" invaluable among the working method and functions.
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Additional resources for Business Objects: Delivering Cooperative Objects for Client-Server (IBM McGraw-Hill Series)
Although they may enable us to deliver iconic applications, they cannot deliver object-based user interfaces. Let's look at two ways that have been tried in the past to address the problem using application-oriented software structures: N Build one large application, within which the various components can communicate. All objects appearing on the user interface will be controlled by this one application N Build a number of small applications where each application can talk to each other application.
GUI APIs The need to understand and code the system-level APIs needed for modern GUIs. Examples are OS/2 Presentation Manager, Windows, X-Windows. All of these require a high skill level on the part of the programmer. It can take up to six months for a good C programmer to become proficient. This explains the popularity of GUI tools, which allow one to ‘paint’ the window, and which hide the underlying complexities. 2. Multi-Tasking While not required for stand-alone applications, multi-tasking (that is, multi-threading) is often required when the PC communicates with other systems.
1). But consider the consequences. We find that, although all three applications may use the common customer Database to access customer details, each application presents a list of customers (the same customers) in a different way. So what? Well, assume that in responding to a customer on the phone, the user needs to look at the customer's balance outstanding, and at the date of the last order. This data may well be in two different customer lists. The user therefore has to choose the correct two customer lists—by accessing the appropriate two applications—to get at the needed information.
Business Objects: Delivering Cooperative Objects for Client-Server (IBM McGraw-Hill Series) by Oliver Sims