Legacy Systems

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Modernizing Legacy Systems

Author : Robert C. Seacord
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.

Working with Legacy Systems

Author : Robert Annett
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.

Legacy Systems

Author : William M. Ulrich
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.

Migrating Legacy Systems

Author : Michael L. Brodie
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.

Working Effectively with Legacy Code

Author : Michael Feathers
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.

The Renaissance of Legacy Systems

Author : Ian Warren
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?

Kill It with Fire

Author : Marianne Bellotti
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.

A Legacy for Living Systems

Author : Jesper Hoffmeyer
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.

Re-Engineering Legacy Software

Author : Chris Birchall
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!

Information Systems Transformation

Author : William M. Ulrich
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

Model-Driven Software Migration: A Methodology

Author : Christian Wagner
Publisher : Springer Science & Business Media
ISBN 13 : 3658052708
Total Pages : 319 pages
Book Rating : 4.6/5 (58 download)

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Book Synopsis Model-Driven Software Migration: A Methodology by : Christian Wagner

Download or read book Model-Driven Software Migration: A Methodology written by Christian Wagner and published by Springer Science & Business Media. This book was released on 2014-03-10 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, reliable software systems are the basis of any business or company. The continuous further development of those systems is the central component in software evolution. It requires a huge amount of time- man power- as well as financial resources. The challenges are size, seniority and heterogeneity of those software systems. Christian Wagner addresses software evolution: the inherent problems and uncertainties in the process. He presents a model-driven method which leads to a synchronization between source code and design. As a result the model layer will be the central part in further evolution and source code becomes a by-product. For the first time a model-driven procedure for maintenance and migration of software systems is described. The procedure is composed of a model-driven reengineering and a model-driven migration phase. The application and effectiveness of the procedure are confirmed with a reference implementation applied to four exemplary systems.

SOA Source Book

Author : The Open Group
Publisher : Van Haren
ISBN 13 : 9087535384
Total Pages : 129 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 2020-06-11 with total page 129 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.

Cyber-Physical Systems of Systems

Author : Andrea Bondavalli
Publisher : Springer
ISBN 13 : 3319475908
Total Pages : 270 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Cyber-Physical Systems of Systems by : Andrea Bondavalli

Download or read book Cyber-Physical Systems of Systems written by Andrea Bondavalli and published by Springer. This book was released on 2016-12-16 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. Technical Systems-of-Systems (SoS) – in the form of networked, independent constituent computing systems temporarily collaborating to achieve a well-defined objective – form the backbone of most of today’s infrastructure. The energy grid, most transportation systems, the global banking industry, the water-supply system, the military equipment, many embedded systems, and a great number more, strongly depend on systems-of-systems. The correct operation and continuous availability of these underlying systems-of-systems are fundamental for the functioning of our modern society. The 8 papers presented in this book document the main insights on Cyber-Physical System of Systems (CPSoSs) that were gained during the work in the FP7-610535 European Research Project AMADEOS (acronym for Architecture for Multi-criticality Agile Dependable Evolutionary Open System-of-Systems). It is the objective of this book to present, in a single consistent body, the foundational concepts and their relationships. These form a conceptual basis for the description and understanding of SoSs and go deeper in what we consider the characterizing and distinguishing elements of SoSs: time, emergence, evolution and dynamicity.

Modernizing Legacy Applications in PHP

Author : Paul Jones
Publisher : Lulu.com
ISBN 13 : 131210063X
Total Pages : 249 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Modernizing Legacy Applications in PHP by : Paul Jones

Download or read book Modernizing Legacy Applications in PHP written by Paul Jones and published by Lulu.com. This book was released on 2014-05-02 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will show you how to modernize your page-based, include-oriented PHP application 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. Each completed step in the process will keep your codebase fully operational with higher quality. Please note that this book is about modernizing in terms of practice and technique, and not in terms of tools. We are not going to discuss the latest, hottest frameworks or libraries. Most of the very limited code we do add to your application is specific to this book. When we are done, you will be able to breeze through your code like the wind. Your code will be fully modernized: autoloaded, dependency-injected, unit-tested, layer-separated, and front-controlled.

Enterprise Integration with Azure Logic Apps

Author : Matthew Bennett
Publisher : Packt Publishing Ltd
ISBN 13 : 1801070962
Total Pages : 294 pages
Book Rating : 4.8/5 (1 download)

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Book Synopsis Enterprise Integration with Azure Logic Apps by : Matthew Bennett

Download or read book Enterprise Integration with Azure Logic Apps written by Matthew Bennett and published by Packt Publishing Ltd. This book was released on 2021-12-23 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to create sophisticated and reliable Logic Apps with improved UX Key FeaturesBecome an Azure Master and create data flows within a matter of minutesPerform transfers using Logic Apps with prompt resultsCreate powerful Logic Apps by enhancing your systems to improve user experienceBook Description Logic Apps are a visual flowchart-like representation of common programming actions, and are a flexible way to create logic without writing a single line of code. Enterprise Integration with Azure Logic Apps is a comprehensive introduction for anyone new to Logic Apps which will boost your learning skills and allow you to create rich, complex, structured, and reusable logic with instant results. You'll begin by discovering how to navigate the Azure portal and understand how your objects can be zoned to a specific environment by using resource groups. Complete with hands-on tutorials, projects, and self-assessment questions, this easy-to-follow guide will teach you the benefits and foundations of Logic App logic design. As you advance, you'll find out how to manage your Azure environment in relation to Logic Apps and how to create elegant and reliable Logic Apps. With useful and practical explanations of how to get the most out of Logic App actions and triggers, you'll be able to ensure that your Logic Apps work efficiently and provide seamless integration for real-world scenarios without having to write code. By the end of this Logic Apps book, you'll be able to create complex and powerful Logic Apps within minutes, integrating large amounts of data on demand, enhancing your systems, and linking applications to improve user experience. What you will learnUnderstand how to use blades, overview pages, and subscription pagesDiscover how to create a Microsoft account to manage your tenantUse a Visual Studio subscription with Azure to manage your Logic AppsFind out how to manage the cloud by analyzing runs, executions, and costsCreate resource groups to zone your enterprise environmentsSupport a development life cycle from sandbox through to productionWho this book is for If you are an aspiring infrastructure technician who already uses Azure in place of on-premises solutions and is now looking to link systems together, then this book is for you. This book is also for developers interested in systems integration where legacy systems may not have a direct data link and the cloud is the intermediary step. Power users with existing IT skills and experience with Power BI and Power Automate will also find this book useful.

Supply Chain and Logistics Management: Concepts, Methodologies, Tools, and Applications

Author : Management Association, Information Resources
Publisher : IGI Global
ISBN 13 : 1799809463
Total Pages : 2148 pages
Book Rating : 4.7/5 (998 download)

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Book Synopsis Supply Chain and Logistics Management: Concepts, Methodologies, Tools, and Applications by : Management Association, Information Resources

Download or read book Supply Chain and Logistics Management: Concepts, Methodologies, Tools, and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2019-11-01 with total page 2148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Business practices are constantly evolving in order to meet growing customer demands. Evaluating the role of logistics and supply chain management skills or applications is necessary for the success of any organization or business. As market competition becomes more aggressive, it is crucial to evaluate ways in which a business can maintain a strategic edge over competitors. Supply Chain and Logistics Management: Concepts, Methodologies, Tools, and Applications is a vital reference source that centers on the effective management of risk factors and the implementation of the latest supply management strategies. It also explores the field of digital supply chain optimization and business transformation. Highlighting a range of topics such as inventory management, competitive advantage, and transport management, this multi-volume book is ideally designed for business managers, supply chain managers, business professionals, academicians, researchers, and upper-level students in the field of supply chain management, operations management, logistics, and operations research.

The Mikado Method

Author : Daniel Brolund
Publisher : Simon and Schuster
ISBN 13 : 1638353182
Total Pages : 353 pages
Book Rating : 4.6/5 (383 download)

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Book Synopsis The Mikado Method by : Daniel Brolund

Download or read book The Mikado Method written by Daniel Brolund and published by Simon and Schuster. This book was released on 2014-03-04 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary The Mikado Method is a book written by the creators of this process. It describes a pragmatic, straightforward, and empirical method to plan and perform non-trivial technical improvements on an existing software system. The method has simple rules, but the applicability is vast. As you read, you'll practice a step-by-step system for identifying the scope and nature of your technical debt, mapping the key dependencies, and determining the safest way to approach the "Mikado"—your goal. About the Technology The game "pick-up sticks" is a good metaphor for the Mikado Method. You eliminate "technical debt" —the legacy problems embedded in nearly every software system— by following a set of easy-to-implement rules. You carefully extract each intertwined dependency until you expose the central issue, without collapsing the project. About the Book The Mikado Method presents a pragmatic process to plan and perform nontrivial technical improvements on an existing software system. The book helps you practice a step-by-step system for identifying the scope and nature of your technical debt, mapping the key dependencies, and determining a safe way to approach the "Mikado"—your goal. A natural by-product of this process is the Mikado Graph, a roadmap that reflects deep understanding of how your system works. This book builds on agile processes such as refactoring, TDD, and rapid feedback. It requires no special hardware or software and can be practiced by both small and large teams. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. What's Inside Understand your technical debt Surface the dependencies in legacy systems Isolate and resolve core concerns while creating minimal disruption Create a roadmap for your changes About the Authors Ola Ellnestam and Daniel Brolund are developers, coaches, and team leaders. They developed the Mikado Method in response to years of experience resolving technical debt in complex legacy systems. Table of Contents PART 1 THE BASICS OF THE MIKADO METHOD Meet the Mikado Method Hello, Mikado Method! Goals, graphs, and guidelines Organizing your work PART 2 PRINCIPLES AND PATTERNS FOR IMPROVING SOFTWARE Breaking up a monolith Emergent design Common restructuring patterns