July 2001
Intermediate to advanced
656 pages
15h 51m
English
book
Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
by Craig Larman
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33.2. Handling Failure
The preceding design provides a solution for client-side caching of ProductSpecification objects in a persistent file, to improve performance, and also to provide at least a partial fall-back solution if the external products service can't be accessed. Perhaps 10,000 products are cached in the local file, which may satisfy most requests for product information even when the external service fails.
What to do in the case where there isn't a local cache hit and access to the external products service fails? Suppose that the stakeholders asked us create a solution that signals the cashier to manually enter the price and description, or cancel the line item entry.
This is an example of an error or failure condition, and it ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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