By Frank Buschmann, Kevin Henney, Douglas C. Schmidt
- Software styles have revolutionized the best way builders take into consideration how software program is designed, equipped, and documented, and this designated e-book deals an in-depth glance of what styles are, what they don't seem to be, and the way to exploit them successfully
- The in basic terms booklet to aim to strengthen a entire language that integrates styles from key literature, it additionally serves as a reference guide for all pattern-oriented software program structure (POSA) patterns
- Addresses the query of what a trend language is and compares a number of trend paradigms
- Developers and programmers working in an object-oriented atmosphere will locate this ebook to be a useful resource
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Extra info for Pattern-oriented software architecture, / Vol. 5, On patterns and pattern languages
Example text
All the concepts we explore and develop build on one another. The various types of relationships between patterns take advantage of the properties of stand-alone patterns. Pattern languages further build on and take advantage of the relationships between patterns. Starting with an informal and intuitive characterization of what a pattern is, we progressively mine and elaborate the different properties and facets of the pattern concept, until we have developed a more complete and consistent picture of what patterns are, what they are not, how they can support you when developing software, and how they relate to other software technologies and techniques.
Calling such design documentations ‘patterns,’ however, can give the impression that an application’s architecture is based on sound and proven design knowledge, even when it is not. fm Page 14 Saturday, March 17, 2007 1:58 PM 14 Beyond the Hype impression may in turn prevent other developers from questioning the design and implementation decisions made, or from exploring alternatives—patterns are often considered a synonym for quality design, so the design must therefore be good if it is pattern based, right?
If the access to the aggregate is expensive, however, accessing it separately for each element over a loop can incur severe performance penalties, such as round-trip time, blocking delay, or context-switching overhead. How can bulk accesses on an aggregate object be performed efficiently and without interruption? Solution: Define a single method that performs the access on the aggregate repeatedly. Instead of accessing aggregate elements individually and directly from within a loop, the client invokes the method to access multiple elements in a single call.