Download Pattern-Oriented Software Architecture: Patterns for by Douglas C. Schmidt, Michael Stal PDF

By Douglas C. Schmidt, Michael Stal

Designing program and middleware software program to run in concurrent and networked environments is an important problem to software program builders. The styles catalogued during this second volume of Pattern-Oriented software program Architectures (POSA) shape the root of a trend language that addresses matters linked to concurrency and networking.

The ebook offers 17 interrelated styles starting from idioms via architectural designs. They disguise middle components of establishing concurrent and community platforms: carrier entry and configuration, occasion dealing with, synchronization, and concurrency. All styles current large examples and identified makes use of in a number of programming languages, together with C++, C, and Java.

The e-book can be utilized to take on particular software program improvement difficulties or learn from hide to hide to supply a basic figuring out of the simplest practices for developing concurrent and networked purposes and middleware.

About the Authors
This publication has been written by way of the award profitable group chargeable for the 1st POSA quantity A method of Patterns, joined during this quantity by means of Douglas C. Schmidt from collage of California, Irvine (UCI), USA.

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Extra info for Pattern-Oriented Software Architecture: Patterns for Concurrent and Networked Objects (Pattern-Oriented Software Architecture, Volume 2)

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Practitioners welcome anecdotal evidence as a means of sorting out the various claims and counterclaims. Anecdotal evidence is useful because it provides some context that enables the results to be interpreted. Yes, it does not represent a controlled study, but real projects are not controlled studies either. More important, anecdotal evidence is a great counter to the problem of researchers extrapolating ideas from a single study, or converting study results into unquestionable dogma. ) over time.

As such, it is very hard to find developers who are neutral because it changes what they do so much. As an aside, even if you could find an appropriate experimental group, finding a control group could be equally hard. The problem is that of the John Henry effect, in which the control group pulls out all the stops to outperform the experimental group. Should We Ask for Comparative Studies? Although opponents of Extreme Programming are always asking for studies about the effectiveness of XP, it is interesting to note that there are no real studies that support any methodology.

Personally, I do not think it is useful to lay the blame on the project teams. In part, this is because blaming the team does not open many avenues for improving the situation. Yes, in the longer term we can change the skills and the abilities of our software development teams, but I have already written about that [McBreen, 2002]. In the short term, a more effective avenue to explore is that of changing our assumptions about software development. After all, if it turns out that people and their interactions are in fact more important than processes and tools, then aligning our processes with this insight would give immediate benefits.

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