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  • Book Overview & Buying Rake Task Management Essentials
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Rake Task Management Essentials

Rake Task Management Essentials

By : Andrey Koleshko
5 (4)
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Rake Task Management Essentials

Rake Task Management Essentials

5 (4)
By: Andrey Koleshko
Buy this Book

Overview of this book

Table of Contents (18 chapters)
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Rake Task Management Essentials
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Rake Task Management Essentials
Credits
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Credits
About the Author
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About the Author
Acknowledgements
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Acknowledgements
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
The Software Task Management Tool – Rake
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The Software Task Management Tool – Rake
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Installing Rake
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Introducing rake tasks
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The command-line arguments
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Using global Rakefiles to run tasks anywhere
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Defining custom rake tasks
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Task dependencies – prerequisites
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The structure of a Rake project
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The code conventions of Rake
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Summary
2
Working with Files
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Working with Files
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Using file tasks to work with files
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The characteristics of the file task dependencies
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Creating a folder with the directory method
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Using Rake's file utilities
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A practical example of automatically generating a config file
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Summary
3
Working with Rules
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Working with Rules
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Understanding the duplication of the file tasks
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Using a rule to get rid of the duplicated file tasks
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Detecting a source for the rule dynamically
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Using a regular expression to match more tasks
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Summary
4
Cleaning Up a Build
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Cleaning Up a Build
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Setting up a project
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The cleaning tasks
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Summary
5
Running Tasks in Parallel
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Running Tasks in Parallel
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Defining tasks with parallel prerequisites
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Thread safety of multitasks
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Multiple task definitions with a common prerequisite
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Applying multitasks in practice
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Summary
6
Debugging Rake Tasks
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Debugging Rake Tasks
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Using command-line arguments for debugging
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Getting a dependency's resolution with --prereqs
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Using the --rules option to trace the rule resolution
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Using the Ruby approach to debug a Rake project
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Summary
7
Integration with Rails
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Integration with Rails
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Introducing Rake's integration with Rails
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Custom rake tasks in a Rails project
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Recurrent running of tasks
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Summary
8
Testing Rake Tasks
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Testing Rake Tasks
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The need for tests
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Writing tests for rake tasks
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Summary
9
Continuous Integration
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Continuous Integration
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Introducing Jenkins
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Setting up Jenkins
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Configuring Jenkins to run rake tasks
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Summary
10
Relentless Automation
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Relentless Automation
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Examples of Rake being used by famous gems
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Other examples of Sinatra using Rake
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Thor – the next generation of Rake
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Summary
1
Index
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Index

Thread safety of multitasks

Rake's internal data structures are thread-safe, so we don't have to do extra synchronization for the benefit of Rake. However, if we have shared variables or resources (for example, the database or files) and the parallel tasks are simultaneously performing operations under them, we must prevent race conditions with additional effort. Basically, this requires using additional tools to synchronize the data.

You've already seen the problem with the @a variable in the previous example. To get rid of the problem, we have to ask the set_b task to wait for the set_a task. However, as we don't have public access to their threads, we can't to do this, so they can't be executed in parallel. In the example, multitasking is redundant and a sequential execution will be more appropriate there; be careful when using multitasking because of this particular reason.

Note

Unfortunately, this book is not intended to explain the multithreading theme and how it works in Ruby. To get...

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