Extreme programming xp is a software development methodology developed primarily by kent beck. Planning extreme programming also focuses on the importance of estimating. The extreme programming playbook every team on every playing field of software development moves and competes within the boundaries of a written or unwritten playbook. An evolving book about extreme programming with perl. Other answers have pointed to various resources describing the xp practices and how they interrelate, so i wont cover that again here. It explores some quite astonishing extremo quotes that have typified the xp approach quotes such as, xpers are not afraid of oral documentation, schedule is the customers problem. We learned early on in this book how software is a craft more than a science. In this second edition of extreme programming explained, kent beck organizes and presents five years worth of experiences, growth, and change revolving around xp. In this completely revised introduction to extreme programming xp, kent beck describes how to improve your software development by integrating these highly desirable concepts into your daily development process. Small releases simple design testing planning game onsite customer collective ownership refactoring.
Graham wright delves into the world of xp, where flexibility and business value is core to its success. There is a great deal of history, verbatim conversation, and statements usually email and descriptions of real projects. We learned early on in this book how software is a craft more than a science, and you. Programmers may find the discussion of team practices useful as well, particularly the ideas about metaphors and simple design. The refactoring book completely changed the way i code. We retain the necessary flexibility through refactoring. Take a peek at what makes up this approach to software. Extreme programming refactored the case against xp don. Thereafter, each pair discussed their approach with the entire group. You may also want to join the extreme perl group at yahoo. How to change xp to fit your specific project and values. In this article, we will tell you about refactoring in extreme programming and describe the main principles of its work.
Each refactoring step is simpleseemingly too simple to be worth doing. In 2001 while searching for information on design patterns, i discovered the original wiki, and stumbled on extreme programming. But, those are descriptions of what is inside xp, and how those things relate. If you buy anything, i earn a commission, at no extra cost to you. I found every chapter immensely useful although i may have read most of the values and principles in other books or blog posts. A book of good advice for working with code that has no unit tests and resists testing. Test driven development is the art of creating code by writing the test first. In the same year, fowler published his book, refactoring. Refactoring is an ongoing process of simplification that applies to code, design, testing, and xp itself. Extreme programming has been evolving since then, and the evolution continues through today. Extreme programming xp is a software development methodology developed. Part 1, programmingprogramming incrementally, testfirst, and refactoring. Synopsis the new concept of extreme programming xp is gaining more and more acceptance, partially because it is controversial, but primarily because it is particularly well.
This is still a worth while read if you are new to xp. Extreme programming xp is a software development approach built around rapid iterations, an emphasis on code writing and working closely with end users to. Embrace change by kent beck written by the originator of xp, and one of the most definitive guides available on xp. Created in 1996 by kent beck, with the help of ward cunningham and ron jeffries, the principles of xp were originally described in becks 1999 book, extreme programming. Extreme programming and agile the most general definition of the xp method says that it is one of the agile approaches to software development. Sams teach yourself extreme programming in 24 hours differs from the rest of the xp book range in that it guides. Refactoring extreme programming practices in action informit. Extreme programming, from the perspectives of programmer, customer, and manager. One popular approach to product development, specific to software, is extreme programming xp. Extreme programming is a new methodology designed to help small development teams deliver value despite constantly changing requirements. Comprehensive suite needed for fearless refactoring only refactor working code do not refactor in the middle of implementing a feature plan your refactoring to allow frequent regression tests modern tools provide help with refactoring recommended book. Embrace change, he detailed the aspects for software development. Many people including myself consider xp to be the primary catalyst that got. Martin is a frequent speaker at technical conferences and has published a number of papers and articles.
Joshua kerievsky,author, refactoring to patterns, and founder, industrial logic, inc. Extreme programming takes the best practices of software development to an extreme level. Refactoring throughout the entire project life cycle saves time and increases quality. If the client wants to change something in the final product, the team should make these changes as fast as it is possible. Refactoring extreme programming practices in action. The 5 important values of extreme programming powerful. Extreme programming installed explains the core principles of extreme programming and details each step in the xp development cycle. This book conveys the essence of the xp approachtechniques for implementation, obstacles likely to be encountered, and experiencebased advice for successful execution. Xp was one of the first agile methods, indeed xp was the dominant agile method in the late 90s and early 00s before scrum became dominant as the noughties passed. Extreme programming xp takes the stance that it is not. The mechanics section in each refactoring is an outstanding tool, and i expect to use it quite frequently.
I have followed the extreme programming xp movement for some time, and im an ardent fan, as is, so i gather, fowler himself. Interview with kent beck and martin fowler on extreme programming. There are design steps in release planning and iteration planning, plus teams engage in quick design sessions and design revisions through refactoring, through the course of the entire project. Refactor out any duplicate code generated in a coding session. Outsourcing working with business contracts in addition, this book alerts you. When we remove redundancy, eliminate unused functionality, and rejuvenate obsolete designs we are refactoring. Extreme programming explained is the right book for anyone to learn how to do that.
Extreme programming teams develop a common vision of how the program works, which we call the metaphor. Extreme programming is a hugely popular although not as popular as scrum methodology focused on meeting changing client requirements. This book proved to be an excellent learning tool during a refactoring session at my extreme programming users group meeting. If you are seriously interested in understanding how you and your team can start down the path of improvement with xp, you must read this book. Extreme programming is flexible in everything, including changes in the initial code. Extreme programming practices in action understanding. In an incremental, iterative process like extreme programming, good design is essential. In 1999, kent published his book, extreme programming explained.
Refactoring is especially necessary in extreme programming and other agile projects because they require strong customer involvement into the working process. With proper training a skilled system designer can take a bad design and rework it into welldesigned, robust code. In refactoring, there is a premium on knowing when to quit. You can do this with confidence that you didnt break anything because you have the tests. The case against xp featuring songs of the extremos takes a satirical look at the increasinglyhyped extreme programming xp methodology. Extreme perl is a book about extreme programming using the programming language perl. At its best, the metaphor is a simple evocative description of. Extreme programming refactored matt stephens, doug rosenberg fiction in its attempt to be a book full of satire while at the same time making good points regarding xp, extreme programming refactored undermines itself.
The case against xp featuring songs of the extremos takes a satirical look at the increasinglyhyped extreme programming xpmethodology. Extreme programming xp is the most popular of a whole new breed of simple, fast, and easytouse software development approaches. Sams teach yourself extreme programming in 24 hours learn more buy. Before describing the xp concepts of refactoring we will find a proper definition for it. Agile originated at the beginning of 2000s as a methodology aimed at improving the efficiency of software development process. Refactoring is the technique of improving code without changing functionality. However, constant refactoring code that works fine is not allways good. We discussed most of the covered refactorings, divided into pairs, and went through several of the exercises many of which had downloadable code. The first edition of extreme programming explained is a classic. Each refactoring improves an implementation in a small way. Constant refactoring after programming refactoring is not bad, that is clear. Extreme programming xp software methodology, principles, xp team roles, facilities design, testing, refactoring, the xp software lifecycle, adopting xp. He is notorious for his work on patterns, the uml, refactoring, and agile methods.
Extreme programming xp is a wellknown form of agile development, with an emphasis on the engineering practices within the programming team. Extreme programming xp is built on 12 key practices. Below are the extreme plays in the playbooks of extreme software teams. This minimizes investment in excess framework and support code. Start with kents white book 1st edition on the left.
The xp scaling and roles is something that the book explained better. An overview of extreme programming and its role in agile. Planning extreme programming kent beck, martin fowler 2000 the first real agile planning book, this book introduced the concept iteration planning, release planning, standup meetings, yesterdays weather, driving as a metaphor for software development, the four variables of project planning cost, quality, time, and scope, as well as tips on story writing, estimation, and. The adaptability of agile methods has made them increasingly popular for software projects. It won awards for its thenradical ideas for improving smallteam development, such as having developers write automated tests for their own code and having the whole team plan weekly. Extreme programming, from the perspectives of programmer. In this book, martin fowler shows you where opportunities for refactoring typically can be found, and how to go about reworking a bad design into a good one. If you can tolerate the extreme satire and sarcasm xss in this book, you can find some interesting and useful information about extreme programming xp and the case against it.
Refactor mercilessly to keep the design simple as you go. The book thus presents something that isnt really xp, and isnt what xp people are talking about, recommending, or doing. Refactoring is the process of improving selection from extreme programming installed book. The first extreme programming project was started in march 1996, by kent beck at chrysler. The first section of the book uses java programming language examples to focus on testfirst programming and refactoring.