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Working Effectively with Legacy Code
- By Michael Feathers
- Published Sep 22, 2004 by Prentice Hall. Part of the Robert C. Martin Series series.
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- About eBook Formats
This eBook includes the following formats, accessible from your Account page after purchase:
EPUB
The open industry format known for its reflowable content and usability on supported mobile devices.
MOBI
The eBook format compatible with the Amazon Kindle and Amazon Kindle applications.
PDF
The popular standard, used most often with the free Adobe® Reader® software.
This eBook requires no passwords or activation to read. We customize your eBook by discreetly watermarking it with your name, making it uniquely yours.
Description
- Copyright 2005
- Dimensions: 7" x 9-1/4"
- Pages: 464
- Edition: 1st
- Book
- ISBN-10: 0-13-117705-2
- ISBN-13: 978-0-13-117705-5
Get more out of your legacy systems: more performance, functionality, reliability, and manageability
Is your code easy to change? Can you get nearly instantaneous feedback when you do change it? Do you understand it? If the answer to any of these questions is no, you have legacy code, and it is draining time and money away from your development efforts.
In this book, Michael Feathers offers start-to-finish strategies for working more effectively with large, untested legacy code bases. This book draws on material Michael created for his renowned Object Mentor seminars: techniques Michael has used in mentoring to help hundreds of developers, technical managers, and testers bring their legacy systems under control.
The topics covered include
- Understanding the mechanics of software change: adding features, fixing bugs, improving design, optimizing performance
- Getting legacy code into a test harness
- Writing tests that protect you against introducing new problems
- Techniques that can be used with any language or platform—with examples in Java, C++, C, and C#
- Accurately identifying where code changes need to be made
- Coping with legacy systems that aren't object-oriented
- Handling applications that don't seem to have any structure
This book also includes a catalog of twenty-four dependency-breaking techniques that help you work with program elements in isolation and make safer changes.
© Copyright Pearson Education. All rights reserved.
Extras
Related Articles
Kicking the Code Monkey: Migrating Your Ancient Code for Fun and Profit
Saving Money with Legacy Source Code
Links
Sample Content
Online Sample Chapters
Changing Software and Legacy Code
Testing Effectively With Legacy Code
Downloadable Sample Chapter
Download Chapter 1 of this title.
Download Chapter 4 of this title.
Sample Pages
Download the sample pages (includes Chapter 1 and Index)
Table of Contents
Preface.
Introduction.
I. THE MECHANICS OF CHANGE.
1. Changing Software.
2. Working with Feedback.
3. Sensing and Separation.
4. The Seam Model.
5. Tools.
II. CHANGING SOFTWARE.
6. I Don’t Have Much Time and I Have To Change It.
7. It Takes Forever To Make a Change.
8. How Do I Add a Feature?
9. I Can’t Get This Class into a Test Harness.
10. I Can’t Run This Method into a Test Harness.
11. I Need to Make a Change. What Methods Should I Test?
12. I Need to Make Many Changes In One Area Do I Have To Break.
13. I Need To Make a Change but I Don’t Know What Tests To Write.
14. Dependencies on Libraries Are Killing Me.
15. My Application Is All API Calls.
16. I Don’t Understand the Code Well Enough To Change It.
17. My Application Has No Structure.
18. My Test Code Is in the Way.
19. My Project Is Not Object-Oriented. How Do I Make Safe Changes?
20. This Class Is Too Big and I Don’t Want It to Get Any Bigger.
21. I’m Changing The Same Code All Over the Place.
22. I Need To Change a Monster Method and I Can’t Write Tests for It.
23. How Do I Know That I’m Not Breaking Anything?
24. We Feel Overwhelmed. It Isn’t Going To Get Any Better.
III. DEPENDENCY BREAKING TECHNIQUES.
25. Dependency Breaking Techniques.
Appendix: Refactoring.
Glossary.
