Working Effectively with Legacy Code

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Publisher : Prentice Hall Professional
ISBN 13 : 0132931753
Total Pages : 457 pages
Book Rating : 4.1/5 (329 download)

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Book Synopsis Working Effectively with Legacy Code by : Michael Feathers

Download or read book Working Effectively with Legacy Code written by Michael Feathers and published by Prentice Hall Professional. This book was released on 2004-09-22 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

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Author :
Publisher : Packt Publishing Ltd
ISBN 13 : 1838988572
Total Pages : 152 pages
Book Rating : 4.8/5 (389 download)

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Book Synopsis Working with Legacy Systems by : Robert Annett

Download or read book Working with Legacy Systems written by Robert Annett and published by Packt Publishing Ltd. This book was released on 2019-06-03 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Modernizing Legacy Systems

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Publisher : Addison-Wesley Professional
ISBN 13 : 9780321118844
Total Pages : 344 pages
Book Rating : 4.1/5 (188 download)

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Book Synopsis Modernizing Legacy Systems by : Robert C. Seacord

Download or read book Modernizing Legacy Systems written by Robert C. Seacord and published by Addison-Wesley Professional. This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Re-Engineering Legacy Software

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Publisher : Simon and Schuster
ISBN 13 : 1638353328
Total Pages : 331 pages
Book Rating : 4.6/5 (383 download)

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Book Synopsis Re-Engineering Legacy Software by : Chris Birchall

Download or read book Re-Engineering Legacy Software written by Chris Birchall and published by Simon and Schuster. This book was released on 2016-04-15 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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!

Migrating Legacy Systems

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Author :
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Migrating Legacy Systems by : Michael L. Brodie

Download or read book Migrating Legacy Systems written by Michael L. Brodie and published by . This book was released on 1995 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information systems that resist modification and don't support organizational requirements are a critical business problem. The authors present a step-by-step strategy for complete IS migration to a new environment and discuss the potential problems and alternatives that may arise in the process.

Legacy Systems

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Publisher :
ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Legacy Systems by : William M. Ulrich

Download or read book Legacy Systems written by William M. Ulrich and published by . This book was released on 2002 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Legacy Systems: Transformation Strategies, leading IT and business architecture consultant William Ulrich presents a step-by-step, phased roadmap to legacy transformation that maximizes business value, while minimizing cost, disruption, and risk. Transformation strategies, organizing disciplines, techniques, and tools reduce the risks of deploying the component-based architectures you need to stay competitive while maximizing the business value of core systems that work.

New Legacy System

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Publisher : DIANE Publishing
ISBN 13 : 1437916422
Total Pages : 91 pages
Book Rating : 4.4/5 (379 download)

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Book Synopsis New Legacy System by : Daniel W. Hancock

Download or read book New Legacy System written by Daniel W. Hancock and published by DIANE Publishing. This book was released on 2009-12 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calif¿s. budget crisis has made plain that scarce revenues will put a premium on managing public resources better than ever if state gov¿t. is to meet its obligations and realize its vision for serving its people. The best mgmt. practices rely on sound info. tech. (IT) systems that can deliver up-to-date data about operations to decision-makers, who can act upon them to improve programs and services. In the last 8 years, Calif. has made great strides in delivering critical IT tools to its managers. Yet Calif. is still far behind other states that are using data to drive performance, due to fear of another big system failure. This report argues that it is time to push past those fears so that Calif. leaders can change the culture of gov¿t. by building the state¿s IT capacity. Illus.

The Renaissance of Legacy Systems

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Publisher : Springer Science & Business Media
ISBN 13 : 1447108175
Total Pages : 189 pages
Book Rating : 4.4/5 (471 download)

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Book Synopsis The Renaissance of Legacy Systems by : Ian Warren

Download or read book The Renaissance of Legacy Systems written by Ian Warren and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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?

Beyond Legacy Code

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Publisher :
ISBN 13 : 9781680500790
Total Pages : 0 pages
Book Rating : 4.5/5 (7 download)

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Book Synopsis Beyond Legacy Code by : David Scott Bernstein

Download or read book Beyond Legacy Code written by David Scott Bernstein and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We're losing tens of billions of dollars a year on broken software, and great new ideas such as agile development and Scrum don't always pay off. But there's hope. The nine software development practices in Beyond Legacy Code are designed to solve the problems facing our industry. Discover why these practices work, not just how they work, and dramatically increase the quality and maintainability of any software project. These nine practices could save the software industry. Beyond Legacy Code is filled with practical, hands-on advice and a common-sense exploration of why technical practices such as refactoring and test-first development are critical to building maintainable software. Discover how to avoid the pitfalls teams encounter when adopting these practices, and how to dramatically reduce the risk associated with building software--realizing significant savings in both the short and long term. With a deeper understanding of the principles behind the practices, you'll build software that's easier and less costly to maintain and extend. By adopting these nine key technical practices, you'll learn to say what, why, and for whom before how; build in small batches; integrate continuously; collaborate; create CLEAN code; write the test first; specify behaviors with tests; implement the design last; and refactor legacy code. Software developers will find hands-on, pragmatic advice for writing higher quality, more maintainable, and bug-free code. Managers, customers, and product owners will gain deeper insight into vital processes. By moving beyond the old-fashioned procedural thinking of the Industrial Revolution, and working together to embrace standards and practices that will advance software development, we can turn the legacy code crisis into a true Information Revolution.

Modernizing Legacy Applications in PHP

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Publisher : Packt Publishing Ltd
ISBN 13 : 1787127788
Total Pages : 286 pages
Book Rating : 4.7/5 (871 download)

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Book Synopsis Modernizing Legacy Applications in PHP by : Paul M. Jones

Download or read book Modernizing Legacy Applications in PHP written by Paul M. Jones and published by Packt Publishing Ltd. This book was released on 2016-08-31 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

SOA Source Book

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Author :
Publisher : Van Haren
ISBN 13 : 9087535031
Total Pages : 130 pages
Book Rating : 4.0/5 (875 download)

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Book Synopsis SOA Source Book by : The Open Group

Download or read book SOA Source Book written by The Open Group and published by Van Haren. This book was released on 2009-04-04 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

A Legacy for Living Systems

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Publisher : Springer Science & Business Media
ISBN 13 : 1402067062
Total Pages : 292 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis A Legacy for Living Systems by : Jesper Hoffmeyer

Download or read book A Legacy for Living Systems written by Jesper Hoffmeyer and published by Springer Science & Business Media. This book was released on 2008-02-01 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gregory Bateson’s contribution to 20th century thinking has appealed to scholars from a wide range of fields dealing in one way or another with aspects of communication and epistemology. A number of his insights were taken up and developed further in anthropology, psychology, evolutionary biology and communication theory. But the large, trans-disciplinary synthesis that, in his own mind, was his major contribution to science received little attention from the mainstream scientific communities. This book represents a major attempt to revise this deficiency. Scholars from ecology, biochemistry, evolutionary biology, cognitive science, anthropology and philosophy discuss how Bateson's thinking might lead to a fruitful reframing of central problems in modern science. Most important perhaps, Bateson's bioanthropology is shown to play a key role in developing the set of ideas explored in the new field of biosemiotics. The idea that organismic life is indeed basically semiotic or communicative lies at the heart of the biosemiotic approach to the study of life. The only book of its kind, this volume provides a key resource for the quickly-growing substratum of scholars in the biosciences, philosophy and medicine who are seeking an elegant new approach to exploring highly complex systems.

Kill It with Fire

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Publisher : No Starch Press
ISBN 13 : 1718501188
Total Pages : 250 pages
Book Rating : 4.7/5 (185 download)

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Book Synopsis Kill It with Fire by : Marianne Bellotti

Download or read book Kill It with Fire written by Marianne Bellotti and published by No Starch Press. This book was released on 2021-03-17 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kill It with Fire chronicles the challenges of dealing with aging computer systems, along with sound modernization strategies. How to survive a legacy apocalypse “Kill it with fire,” the typical first reaction to a legacy system falling into obsolescence, is a knee-jerk approach that often burns through tons of money and time only to result in a less efficient solution. This book offers a far more forgiving modernization framework, laying out smart value-add strategies and proven techniques that work equally well for ancient systems and brand-new ones. Renowned for restoring some of the world’s oldest, messiest computer networks to operational excellence, software engineering expert Marianne Bellotti distills key lessons and insights from her experience into practical, research-backed guidance to help you determine when and how to modernize. With witty, engaging prose, Bellotti explains why new doesn’t always mean better, weaving in illuminating case studies and anecdotes from her work in the field. You’ll learn: Where to focus your maintenance efforts for maximum impact and value How to pick the right modernization solutions for your specific needs and keep your plans on track How to assess whether your migrations will add value before you invest in them What to consider before moving data to the cloud How to determine when a project is finished Packed with resources, exercises, and flexible frameworks for organizations of all ages and sizes, Kill It with Fire will give you a vested interest in your technology’s future.

Information Systems Transformation

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Author :
Publisher : Morgan Kaufmann
ISBN 13 : 0080957102
Total Pages : 449 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Information Systems Transformation by : William M. Ulrich

Download or read book Information Systems Transformation written by William M. Ulrich and published by Morgan Kaufmann. This book was released on 2010-02-04 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every major enterprise has a significant installed base of existing software systems that reflect the tangled IT architectures that result from decades of patches and failed replacements. Most of these systems were designed to support business architectures that have changed dramatically. At best, these systems hinder agility and competitiveness and, at worst, can bring critical business functions to a halt. Architecture-Driven Modernization (ADM) restores the value of entrenched systems by capturing and retooling various aspects of existing application environments, allowing old infrastructures to deliver renewed value and align effectively with enterprise strategies and business architectures. Information Systems Transformation provides a practical guide to organizations seeking ways to understand and leverage existing systems as part of their information management strategies. It includes an introduction to ADM disciplines, tools, and standards as well as a series of scenarios outlining how ADM is applied to various initiatives. Drawing upon lessons learned from real modernization projects, it distills the theory and explains principles, processes, and best practices for every industry. Acts as a one-stop shopping reference and complete guide for implementing various modernization models in myriad industries and departments Every concept is illustrated with real-life examples from various modernization projects, allowing you to immediately apply tested solutions and see results Authored by the Co-chair of the Object Management Group (OMG) Architecture-Driven Modernization (ADM) Task Force, which sets definitive systems modernization standards for the entire IT industry A web site supports the book with up to date coverage of evolving ADM Specifications, Tutorials, and Whitepapers, allowing you to remain up to date on modernization topics as they develop

Implementing Microsoft Dynamics 365 for Finance and Operations

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Publisher : Packt Publishing Ltd
ISBN 13 : 1787121011
Total Pages : 551 pages
Book Rating : 4.7/5 (871 download)

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Book Synopsis Implementing Microsoft Dynamics 365 for Finance and Operations by : Rahul Mohta

Download or read book Implementing Microsoft Dynamics 365 for Finance and Operations written by Rahul Mohta and published by Packt Publishing Ltd. This book was released on 2017-09-15 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harness the power of Dynamics 365 Operations and discover all you need to implement it About This Book Master all the necessary tools and resources to evaluate Dynamics 365 for Operations, implement it, and proactively maintain it. Troubleshoot your problems effectively with your Dynamics 365 partner Learn about architecture, deployment choices, integration, configuration and data migration, development, testing, reporting and BI, support, upgrading, and more. Who This Book Is For This book is for technology leaders, project managers solution architects, and consultants who are planning to implement, are in the process of implementing, or are currently upgrading to Dynamics 365 for Operations. This book will help you effectively learn and implement Dynamics 365 for Operations. What You Will Learn Learn about Microsoft Dynamics 365, it's offerings, plans and details of Finance and Operations, Enterprise edition Understand the methodology and the tool, architecture, and deployment options Effectively plan and manage configurations and data migration, functional design, and technical design Understand integration frameworks, development concepts, best practices, and recommendations while developing new solutions Learn how to leverage intelligence and analytics through Power BI, machine learning, IOT, and Cortana intelligence Master testing, training, going live, upgrading, and how to get support during and after the implementation In Detail Microsoft Dynamics 365 for Finance and Operations, Enterprise edition, is a modern, cloud-first, mobile-first, ERP solution suitable for medium and large enterprise customers. This book will guide you through the entire life cycle of a implementation, helping you avoid common pitfalls while increasing your efficiency and effectiveness at every stage of the project. Starting with the foundations, the book introduces the Microsoft Dynamics 365 offerings, plans, and products. You will be taken through the various methodologies, architectures, and deployments so you can select, implement, and maintain Microsoft Dynamics 365 for Finance and Operations, Enterprise edition. You will delve in-depth into the various phases of implementation: project management, analysis, configuration, data migration, design, development, using Power BI, machine learning, Cortana analytics for intelligence, testing, training, and finally deployment, support cycles, and upgrading. This book focuses on providing you with information about the product and the various concepts and tools, along with real-life examples from the field and guidance that will empower you to execute and implement Dynamics 365 for Finance and Operations, Enterprise edition. Style and approach This book is a step-by-step guide focusing on implementing Dynamics 365 Operations solutions for your organization.

Refactoring

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Publisher : Addison-Wesley Professional
ISBN 13 : 0201485672
Total Pages : 461 pages
Book Rating : 4.2/5 (14 download)

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Book Synopsis Refactoring by : Martin Fowler

Download or read book Refactoring written by Martin Fowler and published by Addison-Wesley Professional. This book was released on 1999 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Refactoring is gaining momentum amongst the object oriented programming community. It can transform the internal dynamics of applications and has the capacity to transform bad code into good code. This book offers an introduction to refactoring.

Technological Innovation in Legacy Sectors

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Publisher : Oxford University Press, USA
ISBN 13 : 0199374511
Total Pages : 381 pages
Book Rating : 4.1/5 (993 download)

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Book Synopsis Technological Innovation in Legacy Sectors by : William Bonvillian

Download or read book Technological Innovation in Legacy Sectors written by William Bonvillian and published by Oxford University Press, USA. This book was released on 2015 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resistance by vested interests to disruptive technological innovation limits growth, sustainability and the creation of quality jobs in more than two thirds of the US economy. This book uses a new, unifying conceptual framework to identify the shared features underlying structural obstacles to innovation in major legacy sectors: energy, air and auto transport, the electric grid, construction, health care delivery and higher education.