The Pragmatic Programmers - Avdi Grimm - Exceptional Ruby [2011, PDF, ENG] torrent

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Exceptional Ruby

Год: 2011
Автор: Avdi Grimm
Издательство: The Pragmatic Programmers, LLC
ISBN: 978-1-93778-551-2
Серия: The Pragmatic Programmers
Язык: Английский
Формат: PDF
Качество: Изначально компьютерное (eBook)
Интерактивное оглавление: Да
Количество страниц: 102
Описание: Writing code that works is hard. Writing code that handles unexpected errors and still works is really hard. Most of us learn by trial and error. This short book removes the uncertainty. With over 100 pages of content and dozens of working examples, you’ll learn everything from the mechanics of how exceptions work to how to design a robust failure management architecture for your app or library. Whether you are a Ruby novice or a seasoned veteran, Exceptional Ruby will help you write cleaner, more resilient Ruby code.

Inside this electronic-only book, you’ll find: A detailed look at the lifecycle of a Ruby exception.
Overriding Kernel#raise for fun and profit.
Alternatives to exceptions, for when “fail fast” isn’t the right answer.
How to write a crash logger.
Advanced dynamic exception matching in rescue clauses.
Avoiding failure cascades with the Barricade and Circuit Breaker patterns.
Five questions to ask before raising an exception.
Exception safety testing for critical methods.
How to create an error API for your library that will make other developers want to kiss you.
The three exception classes every app or library needs.
And much, much more… over 100 pages of tips, guidelines, and awesome hacks!
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[spoiler="Оглавление"]
About
Acknowledgements
Introduction
What is a failure?
Definitions
Failure as a breach of contract
Reasons for failure
The life-cycle of an exception
It all starts with a raise (or a fail)
Calling raise
Overriding raise for fun and profit
raise internals
ensure
Coming to the rescue
If at first you don’t succeed, retry, retry again
raise during exception handling
else
Uncaught exceptions
Exceptions in threads
Are Ruby exceptions slow?
Responding to failures
Failure flags and benign values
Reporting failure to the console
Remote failure reporting
Ending the program
Alternatives to exceptions
Sidebanddata
Multiple return values
Output parameters
Caller-supplied fallback strategy
Global variables
Process reification
Beyond exceptions
Your failure handling strategy
Exceptions shouldn’t be expected
A rule of thumb for raising
Use throw for expected cases
What constitutes an exceptional case?
Caller-supplied fallback strategy
Some questions before raising
Isolateexceptionhandlingcode
Exception Safety
Be specific when eating exceptions
Namespace your own exceptions
Taggingexceptionswithmodules
The no-raise library API
Three essential exception classes
Conclusion
References
Appendix A: Exception tester implementation
Appendix B: An incomplete tour of ruby’s standard exceptions
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