Business Objects: Delivering Cooperative Objects for by Oliver Sims

By Oliver Sims

An leading edge examine how companies can reap the benefits of using object-orientation to client/server structures. in addition to targeting the production of software program within the type of CBOs, the ebook essentially explains the allowing layer of "middleware" precious among the working approach and purposes.

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Extra resources for Business Objects: Delivering Cooperative Objects for Client-Server (IBM McGraw-Hill Series)

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The first project started work on an ‘order processing workbench’ for a set of people in the marketing division. 7 shows the Order Processing workbench as the top left window, with an Order Form opened to the right (the icon for this is not shown). A few weeks later, the second project began development of a ‘contracting workbench’ (all the things needed to handle contracts with customers) for people in both the manufacturing and marketing divisions. 7. Product List Customer A123 Contract Folder Contract Forms Customer A123 Contract The workbench problem.

In discussing how people use technology (such as a video player, a swing door, a cooker, or a computer), Donald Norman [Norman 1990] identifies three conceptual, or mental models that are important in the operation of such devices. These are: 8 Business Objects N The user's model (the user's concept of how the device works) N The designer's model (how the device actually works) N The system image (what the user sees). In practical terms, the system image is the user's only access to the designer's model of the system.

3 Note that a CBO may send a message to another CBO in order to complete the handling of the incoming message. The CBOs can each be written in different languages. A CBO is not a kind of mini application, running in its own address space. While that may on occasion be required, in general, several CBOs should be able to run in the same address space—perhaps in the same thread (or task). From the operating system point of view, this makes CBOs quite fine-grained units of execution. The underlying CBO Infrastructure must enable this level of granularity as well as larger levels.

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