Maintaining A Legacy

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Working Effectively with Legacy Code

Michael Feathers
Working Effectively with Legacy Code Book PDF

Author : Michael Feathers
Publisher : Prentice Hall Professional
Page : 457 pages
File Size : 46,6 Mb
Release : 2004-09-22
Category : Computers
ISBN : 9780132931755

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Working Effectively with Legacy Code by Michael Feathers Pdf

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.

Working with Legacy Systems

Robert Annett
Working with Legacy Systems Book PDF

Author : Robert Annett
Publisher : Packt Publishing Ltd
Page : 152 pages
File Size : 49,7 Mb
Release : 2019-06-03
Category : Computers
ISBN : 9781838988579

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Working with Legacy Systems by Robert Annett Pdf

The IT industry is obsessed with new technologies. Courses, books, and magazines mostly focus on what is new. Starting with what a legacy system looks like to applying various techniques for maintaining and securing these systems, this book gives you all the knowledge you need to maintain a legacy system.

How Do Businesses and Generations Maintain Its Legacy?

Krakrafaa Thompson Tenent Bestman
How Do Businesses and Generations Maintain Its Legacy Book PDF

Author : Krakrafaa Thompson Tenent Bestman
Publisher : Partridge Africa
Page : 326 pages
File Size : 55,8 Mb
Release : 2018-02-23
Category : Business & Economics
ISBN : 9781482876604

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How Do Businesses and Generations Maintain Its Legacy? by Krakrafaa Thompson Tenent Bestman Pdf

Employees exit an organization with 80% of the knowledge they have acquired without transferring it to others. This colossal loss of intellectual assets is even more in terms of parent to child legacy transfer. Several factors may have contributed to this immense generational memory loss. First, the knowledge seekers do not know what to do on how to influence the knowledge sources to share their skills and experiences and may not even understand the characteristics of the knowledge they intend to access from the knowledge sources. Second, these intellectual assets such as skills and experiences they intend to access give the knowledge sources their comparative advantage in the society and worst still, they are not on the pages of procedures or other documented format, but mainly domicile in the heads of the possessors and hence not visible to others. Third, people also regard their skills and experiences as invaluable intellectual assets and hence do not want to easily share it with others. These are some of the constraints knowledge seekers face, whether in an organization or the society while trying to access the information they require in creating value in their respective domains. Eventually, the legacies transferred to the knowledge seekers fall short of what would have been transferred if the knowledge seeker knows otherwise. This book bridges this gap by providing a strategic and systematic approach on how a knowledge seeker may apply social interaction variables and its hierarchical effect on knowledge transfer to influence a knowledge source to share his or her intellectual assets that he or she might not ordinarily be willing to share with any knowledge seeker.

Modernizing Legacy Applications in PHP

Paul M. Jones
Modernizing Legacy Applications in PHP Book PDF

Author : Paul M. Jones
Publisher : Packt Publishing Ltd
Page : 286 pages
File Size : 51,9 Mb
Release : 2016-08-31
Category : Computers
ISBN : 9781787127784

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Modernizing Legacy Applications in PHP by Paul M. Jones Pdf

Get your code under control in a series of small, specific steps About This Book Learn to extract and replace legacy artifacts, Improve your application from the ground up while keeping your codebase fully operational, Improve the quality of your legacy applications. Who This Book Is For PHP developers from all skill levels will be able to get value from this book and will be able to transform their spaghetti code applications to clean, modular applications. If you are in the midst of a legacy refactor or you find yourself in a state of despair caused by the code you have inherited, this is the book for you. All you need is to have PHP 5.0 installed, and you're all set to change the way you maintain and deploy your code! What You Will Learn Replace global and new with dependency injection Extract SQL statements to gateways Convert action logic to controllers Remove repeated logic in page scripts Create maintainable PHP code from crufty legacy PHP In Detail Have you noticed that your legacy PHP application is composed of page scripts placed directly in the document root of the web server? Or, do your page scripts, along with any other classes and functions, combine the concerns of model, view, and controller into the same scope? Is the majority of the logical flow incorporated as include files and global functions rather than class methods? Working with such a legacy application feels like dragging your feet through mud, doesn't it?This book will show you how to modernize your application in terms of practice and technique, rather than in terms of using tools like frameworks and libraries, by extracting and replacing its legacy artifacts. We will use a step-by-step approach, moving slowly and methodically, to improve your application from the ground up. We'll show you how dependency injection can replace both the new and global dependencies. We'll also show you how to change the presentation logic to view files and the action logic to a controller. Moreover, we'll keep your application running the whole time. Each completed step in the process will keep your codebase fully operational with higher quality. When we are done, you will be able to breeze through your code like the wind. Your code will be autoloaded, dependency-injected, unit-tested, layer-separated, and front-controlled. Most of the very limited code we will add to your application is specific to this book. We will be improving ourselves as programmers, as well as improving the quality of our legacy application. Style and approach This book gives developers an easy-to-follow, practical and powerful process to bring their applications up to a modern baseline. Each step in the book is practical, self-contained and moves you closer to the end goal you seek: maintainable code. As you follow the exercises in the book, the author almost anticipates your questions and you will have the answers, ready to be implemented on your project.

Modernizing Legacy Systems

Robert C. Seacord,Daniel Plakosh,Grace A. Lewis
Modernizing Legacy Systems Book PDF

Author : Robert C. Seacord,Daniel Plakosh,Grace A. Lewis
Publisher : Addison-Wesley Professional
Page : 344 pages
File Size : 42,7 Mb
Release : 2003
Category : Electronic books
ISBN : 0321118847

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Modernizing Legacy Systems by Robert C. Seacord,Daniel Plakosh,Grace A. Lewis Pdf

Most organizations rely on complex enterprise information systems (EISs) to codify their business practices and collect, process, and analyze business data. These EISs are large, heterogeneous, distributed, constantly evolving, dynamic, long-lived, and mission critical. In other words, they are a complicated system of systems. As features are added to an EIS, new technologies and components are selected and integrated. In many ways, these information systems are to an enterprise what a brain is to the higher species--a complex, poorly understood mass upon which the organism relies for its very existence. To optimize business value, these large, complex systems must be modernized--but where does one begin? This book uses an extensive real-world case study (based on the modernization of a thirty year old retail system) to show how modernizing legacy systems can deliver significant business value to any organization.

The Renaissance of Legacy Systems

Ian Warren
The Renaissance of Legacy Systems Book PDF

Author : Ian Warren
Publisher : Springer Science & Business Media
Page : 189 pages
File Size : 47,5 Mb
Release : 2012-12-06
Category : Computers
ISBN : 9781447108177

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The Renaissance of Legacy Systems by Ian Warren Pdf

Many antiquated or legacy systems are still in operation today because they are critical to the organizations continued operations or are prohibitively expensive to replace. This book guides practitioners in managing the process of legacy system evolution. The author introduces a comprehensive method for managing a software evolution project, from its conception to the deployment of the resulting system. The book helps managers answer two critical decisions: What is the best way to evolve a particular legacy system? and How can the legacy system be migrated to a selected target architecture?

Build Your Legacy

Chris Flores
Build Your Legacy Book PDF

Author : Chris Flores
Publisher : Unknown
Page : 76 pages
File Size : 55,8 Mb
Release : 2020-12-12
Category : Electronic
ISBN : 9798579423498

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Build Your Legacy by Chris Flores Pdf

In a world of uncertainty, tomorrow is never promised. Inspired by the birth of my children, I wanted them to have a set of principles by which to live. I wanted them to always know what our family stands for. With all the increase in communication and technology, fewer and fewer people have their own moral compass. Each day there is a bombardment of media designed to gain our attention and fill minds with fear. This book is by no means just for those with children. This is for all families or individuals who wish to build their own legacy. You can begin by writing down your rules for life and how you live, creating the intention, and taking the necessary steps to make the idea become a reality. This is how you go about building a lasting legacy. The goal of this book is for each person who reads it to be inspired to build their own legacy.

Re-Engineering Legacy Software

Chris Birchall
Re Engineering Legacy Software Book PDF

Author : Chris Birchall
Publisher : Simon and Schuster
Page : 331 pages
File Size : 44,6 Mb
Release : 2016-04-15
Category : Computers
ISBN : 9781638353324

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Re-Engineering Legacy Software by Chris Birchall Pdf

Summary As a developer, you may inherit projects built on existing codebases with design patterns, usage assumptions, infrastructure, and tooling from another time and another team. Fortunately, there are ways to breathe new life into legacy projects so you can maintain, improve, and scale them without fighting their limitations. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the Book Re-Engineering Legacy Software is an experience-driven guide to revitalizing inherited projects. It covers refactoring, quality metrics, toolchain and workflow, continuous integration, infrastructure automation, and organizational culture. You'll learn techniques for introducing dependency injection for code modularity, quantitatively measuring quality, and automating infrastructure. You'll also develop practical processes for deciding whether to rewrite or refactor, organizing teams, and convincing management that quality matters. Core topics include deciphering and modularizing awkward code structures, integrating and automating tests, replacing outdated build systems, and using tools like Vagrant and Ansible for infrastructure automation. What's Inside Refactoring legacy codebases Continuous inspection and integration Automating legacy infrastructure New tests for old code Modularizing monolithic projects About the Reader This book is written for developers and team leads comfortable with an OO language like Java or C#. About the Author Chris Birchall is a senior developer at the Guardian in London, working on the back-end services that power the website. Table of Contents PART 1 GETTING STARTED Understanding the challenges of legacy projects Finding your starting point PART 2 REFACTORING TO IMPROVE THE CODEBASE Preparing to refactor Refactoring Re-architecting The Big Rewrite PART 3 BEYOND REFACTORING—IMPROVING PROJECT WORKFLOWAND INFRASTRUCTURE Automating the development environment Extending automation to test, staging, and production environments Modernizing the development, building, and deployment of legacy software Stop writing legacy code!

Database Systems for Advanced Applications '97

Rodney Topor,Katsumi Tanaka
Database Systems for Advanced Applications 97 Book PDF

Author : Rodney Topor,Katsumi Tanaka
Publisher : World Scientific
Page : 567 pages
File Size : 44,9 Mb
Release : 1997
Category : Computers
ISBN : 9789810231071

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Database Systems for Advanced Applications '97 by Rodney Topor,Katsumi Tanaka Pdf

This volume contains the proceedings of the Fifth International Conference on Database Systems for Advanced Applications (DASFAA '97). DASFAA '97 focused on advanced database technologies and their applications. The 55 papers in this volume cover a wide range of areas in the field of database systems and applications ? including the rapidly emerging areas of the Internet, multimedia, and document database systems ? and should be of great interest to all database system researchers and developers, and practitioners.

SOA Source Book

The Open Group
SOA Source Book Book PDF

Author : The Open Group
Publisher : Van Haren
Page : 130 pages
File Size : 49,7 Mb
Release : 2009-04-04
Category : Education
ISBN : 9789087535032

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SOA Source Book by The Open Group Pdf

Software services are established as a programming concept, but their impact on the overall architecture of enterprise IT and business operations is not well-understood. This has led to problems in deploying SOA, and some disillusionment. The SOA Source Book adds to this a collection of reference material for SOA. It is an invaluable resource for enterprise architects working with SOA.The SOA Source Book will help enterprise architects to use SOA effectively. It explains: What SOA is How to evaluate SOA features in business terms How to model SOA How to use The Open Group Architecture Framework (TOGAF™) for SOA SOA governance This book explains how TOGAF can help to make an Enterprise Architecture. Enterprise Architecture is an approach that can help management to understand this growing complexity.

Securing and Sustaining the Olympic City

Pete Fussey,Jon Coaffee,Dick Hobbs
Securing and Sustaining the Olympic City Book PDF

Author : Pete Fussey,Jon Coaffee,Dick Hobbs
Publisher : Routledge
Page : 328 pages
File Size : 45,8 Mb
Release : 2016-04-01
Category : Sports & Recreation
ISBN : 9781317058205

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Securing and Sustaining the Olympic City by Pete Fussey,Jon Coaffee,Dick Hobbs Pdf

Often seen as the host nation's largest ever logistical undertaking, accommodating the Olympics and its attendant security infrastructure brings seismic changes to both the physical and social geography of its destination. Since 1976, the defence of the spectacle has become the central feature of its planning, one that has assumed even greater prominence following the bombing of the 1996 Atlanta Games and, most importantly, 9/11. Indeed, the quintupled cost of securing the first post-9/11 summer Games in Athens demonstrates the considerable scale and complexity currently implicated in these operations. Such costs are not only fiscal. The Games stimulate a tidal wave of redevelopment ushering in new gentrified urban settings and an associated investment that may or may not soak through to the incumbent community. Given the unusual step of developing London's Olympic Park in the heart of an existing urban milieu and the stated commitments to 'community development' and 'legacy', these constitute particularly acute issues for the 2012 Games. In addition to sealing the Olympic Park from perceived threats, 2012 security operations have also harnessed the administrative criminological staples of community safety and crime reduction to generate an ordered space in the surrounding areas. Of central importance here are the issues of citizenship, engagement and access in urban spaces redeveloped upon the themes of security and commerce. Through analyzing the social and community impact of the 2012 Games and its security operation on East London, this book concludes by considering the key debates as to whether utopian visions of legacy can be sustained given the demands of providing a global securitized event of the magnitude of the modern Olympics.

Olympic Legacies: Intended and Unintended

J A Mangan,Mark Dyreson
Olympic Legacies Intended and Unintended Book PDF

Author : J A Mangan,Mark Dyreson
Publisher : Routledge
Page : 314 pages
File Size : 41,5 Mb
Release : 2013-10-18
Category : Sports & Recreation
ISBN : 9781317966616

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Olympic Legacies: Intended and Unintended by J A Mangan,Mark Dyreson Pdf

For more than a century, the Olympics have been the modern world's most significant sporting event. Indeed, they deserve much credit for globalizing sport beyond the boundaries of the Anglo-American universe, where it originated, into broader global realms. By the 1930s, the Olympics had become a global mega-event that occupied the attention of the media, the interest of the public and the energies of nation-states. Since then, projected by television, funded by global capital and fattened by the desires of nations to garner international prestige, the Olympics have grown to gargantuan dimensions. In the course of its epic history, the Olympics have left numerous legacies, from unforgettable feats to monumental stadiums, from shining triumphs to searing tragedies, from the dazzling debuts on the world's stage of new cities and nations to notorious campaigns of national propaganda. The Olympics represent an essential component of modern global history. The Olympic movement itself has, since the 1990s, recognized and sought to shape its numerous legacies with mixed success as this book makes clear. It offers ground-breaking analyses of the power of Olympic legacies, positive and negative, and surveys the subject from Athens in 1896 to Beijing in 2008, and indeed beyond. This book was published as a special issue of the International Journal of the History of Sport.

Software Design X-Rays

Adam Tornhill
Software Design X Rays Book PDF

Author : Adam Tornhill
Publisher : Pragmatic Bookshelf
Page : 362 pages
File Size : 52,5 Mb
Release : 2018-03-08
Category : Computers
ISBN : 9781680505801

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Software Design X-Rays by Adam Tornhill Pdf

Are you working on a codebase where cost overruns, death marches, and heroic fights with legacy code monsters are the norm? Battle these adversaries with novel ways to identify and prioritize technical debt, based on behavioral data from how developers work with code. And that's just for starters. Because good code involves social design, as well as technical design, you can find surprising dependencies between people and code to resolve coordination bottlenecks among teams. Best of all, the techniques build on behavioral data that you already have: your version-control system. Join the fight for better code! Use statistics and data science to uncover both problematic code and the behavioral patterns of the developers who build your software. This combination gives you insights you can't get from the code alone. Use these insights to prioritize refactoring needs, measure their effect, find implicit dependencies between different modules, and automatically create knowledge maps of your system based on actual code contributions. In a radical, much-needed change from common practice, guide organizational decisions with objective data by measuring how well your development teams align with the software architecture. Discover a comprehensive set of practical analysis techniques based on version-control data, where each point is illustrated with a case study from a real-world codebase. Because the techniques are language neutral, you can apply them to your own code no matter what programming language you use. Guide organizational decisions with objective data by measuring how well your development teams align with the software architecture. Apply research findings from social psychology to software development, ensuring you get the tools you need to coach your organization towards better code. If you're an experienced programmer, software architect, or technical manager, you'll get a new perspective that will change how you work with code. What You Need: You don't have to install anything to follow along in the book. TThe case studies in the book use well-known open source projects hosted on GitHub. You'll use CodeScene, a free software analysis tool for open source projects, for the case studies. We also discuss alternative tooling options where they exist.

Practical Software Estimation

M. A. Parthasarathy
Practical Software Estimation Book PDF

Author : M. A. Parthasarathy
Publisher : Pearson Education
Page : 431 pages
File Size : 40,5 Mb
Release : 2003-02-25
Category : Computers
ISBN : 9780132702447

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Practical Software Estimation by M. A. Parthasarathy Pdf

"A clearly written book that is a useful primer for a very complicated set of topics." --Capers Jones, Chief Scientist Emeritus, Software Productivity Research LLC Practical Software Estimation brings together today's most valuable tips, techniques, and best practices for accurately estimating software project efforts, costs, and schedules. Written by a leading expert in the field, it addresses the full spectrum of real-world challenges faced by those who must develop reliable estimates. M. A. Parthasarathy draws on the immense experience of Infosys, one of the world's largest and most respected providers of IT-enabled business solutions, to bring you the only book with detailed guidance on estimating insourced and outsourced software projects, as well as projects that blend both approaches. He demonstrates how to successfully utilize Function Point (FP) methods, the industry's leading estimation model. Then, using real case studies, he systematically identifies pitfalls that can lead to inaccurate estimates--and offers proven solutions. Coverage includes How to estimate all types of software projects, including "fresh" development, reengineering, and maintenance How to incorporate the impact of core project elements on estimates: scope, environment, experience, and tools FP analysis from start to finish: data and transaction functions, general system characteristics, and more FP methods for any platform or business function Innovative re-estimation methods to track progress How to quote RFPs and prepare contracts: fixed price, time/material, and project execution lifecycle models Alternatives to FP: Delphi, COCOMO II, and COSMIC-FFP How to choose the right estimation tools Practical Software Estimation is the definitive reference for anyone who must estimate software projects accurately: project and IT managers, individual developers, system designers, architects, executives, consultants, and outsourcers alike. List of Figures List of Tables Foreword Preface Acknowledgments Chapter 1: Introduction Chapter 2: Role of Estimation in Software Projects Chapter 3: A Study of Function Point Analysis Chapter 4: Data Functions Chapter 5: Transactional Functions Chapter 6: General System Characteristics Chapter 7: Size, Effort, and Scheduling of Projects Chapter 8: Estimation Flavors Chapter 9: A Sense of Where You Are Chapter 10: Tips, Tricks, and Traps Chapter 11: Insourcing versus Outsourcing Chapter 12: Key Factors in Software Contracts Chapter 13: Project Estimation and Costing Chapter 14: Other Estimation Methods Chapter 15: Estimation Tools Chapter 16: Estimation Case Study Appendix A: Reference Tables: Transaction Function Counts Appendix B: Reference Tables: Data Function Points Bibliography Index

Your Family Legacy

Michael W Palumbos
Your Family Legacy Book PDF

Author : Michael W Palumbos
Publisher : Collaborative Family Office
Page : 78 pages
File Size : 51,7 Mb
Release : 2012-01-30
Category : Electronic
ISBN : 0985127503

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Your Family Legacy by Michael W Palumbos Pdf

Family, wealth and legacy are really what it all boils down to, isn't it? Did we love and were we loved? Did we acquire wealth, whether tangible, relational or spiritual? Did we make a difference? Your Family Legacy is a simple and easy read designed to get you thinking about retirement, estate planning and passing your 'true wealth' to the next generation. When we talk about wealth we include not only money and our assets but everything that is important to us....our values, our knowledge and our family business. The goal of this book is for every reader to walk away with one new idea that you can use to create, grow, keep and share every form of wealth that is important to you. One idea that you implement for generations to come.