This book lays the foundation for maximizing the use of design patterns by helping the reader view them in the context of refactorings. Groundbreaking work! Part of Martin Fowler´s Signature Series, developed with significant input from Fowler himself Ties together two of the most popular methods in software engineering today -- refactoring and design patterns Helps software designers improve their efficiency and create more robust software The reality of software is that great software designs are not necessarily created, but it is more likely that they evolve. In this eagerly-anticipated new book, Joshua Kerievsky helps the experienced developer see design patterns in the context of refactorings, not just as reusable elements existing apart from the refactoring literature. This fresh perspective helps the reader to learn how to evolve a software design. Test-first programming and merciless refactoring are the key practices of evolutionary design, and the author imparts his unique knowledge on these topics. The result is a classic book containing a plethora of practical advice that will help software designers properly gauge the project at hand, and evolve a design that will give their organization a competitive advantage. Product Description In 1994, Design Patterns changed the landscape of object-oriented development by introducing classic solutions to recurring design problems. In 1999, Refactoring revolutionized design by introducing an effective process for improving code. With the highly anticipated Refactoring to Patterns , Joshua Kerievsky has changed our approach to design by forever uniting patterns with the evolutionary process of refactoring. This book introduces the theory and practice of pattern-directed refactorings: sequences of low-level refactorings that allow designers to safely move designs to, towards, or away from pattern implementations. Using code from real-world projects, Kerievsky documents the thinking and steps underlying over two dozen pattern-based design transformations. Along the way he offers insights into pattern differences and how to implement patterns in the simplest possible ways. Coverage includes: A catalog of twenty-seven pattern-directed refactorings, featuring real-world code examples Descriptions of twelve design smells that indicate the need for this book´s refactorings General information and new insights about patterns and refactoring Detailed implementation mechanics: how low-level refactorings are combined to implement high-level patterns Multiple ways to implement the same pattern-and when to use each Practical ways to get started even if you have little experience with patterns or refactoring Refactoring to Patterns reflects three years of refinement and the insights of more than sixty software engineering thought leaders in the global patterns, refactoring, and agile development communities. Whether you´re focused on legacy or ´´greenfield´´ development, this book will make you a better software designer by helping you learn how to make important design changes safely and effectively. Features + Benefits This book lays the foundation for maximizing the use of design patterns by helping the reader view them in the context of refactorings. ° Groundbreaking work! Part of Martin Fowler´s Signature Series, developed with significant input from Fowler himself ° Ties together two of the most popular methods in software engineering today -- refactoring and design patterns ° Helps software designers improve their efficiency and create more robust software Backcover In 1994, Design Patterns changed the landscape of object-oriented development by introducing classic solutions to recurring design problems. In 1999, Refactoring revolutionized design by introducing an effective process for improving code. With the highly anticipated Refactoring to Patterns , Joshua Kerievsky has changed our approach to design by forever uniting patterns with the evolutionary process of refactoring. This book introduces the theory and practice of pattern-directed refactorings: sequences of low-level refactorings that allow designers to safely move designs to, towards, or away from pattern implementations. Using code from real-world projects, Kerievsky documents the thinking and steps underlying over two dozen pattern-based design transformations. Along the way he offers insights into pattern differences and how to implement patterns in the simplest possible ways. Coverage includes: A catalog of
Patterns kompakt fasst die wichtigsten Entwurfsmuster zusammen, die Sie für Software-Entwicklung benötigen. Software-Entwickler, -Architekten und -Designer finden darin effektiv anwendbare Lösungen für tägliche Entwurfsprobleme. Die vierte Auflage wurde um aktuelle Patterns erweitert und komplett überarbeitet. Das Buch gliedert Patterns anhand typischer Aspekte des Software-Entwurfs: Basismuster für mehr Flexibilität und Wartbarkeit, Präsentation, Kommunikation und Verteilung, Integration und Persistenz. Patterns kompakt richtet sich an Praktiker: Software-Entwickler, -Designer, -Architekten und alle, die einen praxisorientierten Überblick zu Entwurfsmustern benötigen.
Patterns kompakt fasst die wichtigsten Entwurfsmuster zusammen, die Sie für Softwareentwicklung benötigen. Softwareentwickler und -architekten finden darin effektiv anwendbare Lösungen für tägliche Entwurfsprobleme. Das Buch gliedert Patterns anhand typischer Aspekte des Softwareentwurfs: - Basismuster für mehr Flexibilität und Wartbarkeit - Präsentation - Kommunikation und Verteilung - Integration - Persistenz Die nunmehr fünfte (aktualisierte und erweiterte) Auflage enthält darüber hinaus ein Kapitel zum Thema Software-Inbetriebnahme. Patterns kompakt richtet sich an Praktiker: Softwareentwickler, -architekten sowie alle, die einen praxisorientierten Überblick zu Entwurfsmustern benötigen.
Automated testing is a cornerstone of agile development. An effective testing strategy will deliver new functionality more aggressively, accelerate user feedback, and improve quality. However, for many developers, creating effective automated tests is a unique and unfamiliar challenge. xUnit Test Patterns is the definitive guide to writing automated tests using xUnit, the most popular unit testing framework in use today. Agile coach and test automation expert Gerard Meszaros describes 68 proven patterns for making tests easier to write, understand, and maintain. He then shows you how to make them more robust and repeatable--and far more cost-effective. Loaded with information, this book feels like three books in one. The first part is a detailed tutorial on test automation that covers everything from test strategy to in-depth test coding. The second part, a catalog of 18 frequently encountered test smells, provides trouble-shooting guidelines to help you determine the root cause of problems and the most applicable patterns. The third part contains detailed descriptions of each pattern, including refactoring instructions illustrated by extensive code samples in multiple programming languages. Topics covered include Writing better tests--and writing them faster The four phases of automated tests: fixture setup, exercising the system under test, result verification, and fixture teardown Improving test coverage by isolating software from its environment using Test Stubs and Mock Objects Designing software for greater testability Using test smells (including code smells, behavior smells, and project smells) to spot problems and know when and how to eliminate them Refactoring tests for greater simplicity, robustness, and execution speed This book will benefit developers, managers, and testers working with any agile or conventional development process, whether doing test-driven development or writing the tests last. While the patterns and smells are especially applicable to all members of the xUnit family, they also apply to next-generation behavior-driven development frameworks such as RSpec and JBehave and to other kinds of test automation tools, including recorded test tools and data-driven test tools such as Fit and FitNesse. Visual Summary of the Pattern Language Foreword Preface Acknowledgments Introduction Refactoring a Test PART I: The Narratives Chapter 1 A Brief Tour Chapter 2 Test Smells Chapter 3 Goals of Test Automation Chapter 4 Philosophy of Test Automation Chapter 5 Principles of Test Automation Chapter 6 Test Automation Strategy Chapter 7 xUnit Basics Chapter 8 Transient Fixture Management Chapter 9 Persistent Fixture Management Chapter 10 Result Verification Chapter 11 Using Test Doubles Chapter 12 Organizing Our Tests Chapter 13 Testing with Databases Chapter 14 A Roadmap to Effective Test Automation PART II: The Test Smells Chapter 15 Code Smells Chapter 16 Behavior Smells Chapter 17 Project Smells PART III: The Patterns Chapter 18 Test Strategy Patterns Chapter 19 xUnit Basics Patterns Chapter 20 Fixture Setup Patterns Chapter 21 Result Verification Patterns Chapter 22 Fixture Teardown Patterns Chapter 23 Test Double Patterns Chapter 24 Test Organization Patterns Chapter 25 Database Patterns Chapter 26 Design-for-Testability Patterns Chapter 27 Value Patterns PART IV: Appendixes Appendix A Test Refactorings Appendix B xUnit Terminology Appendix C xUnit Family Members Appendix D Tools Appendix E Goals and Principles Appendix F Smells, Aliases, and Causes Appendix G Patterns, Aliases, and Variations Glossary References Inde
Build server-side applications more efficiently?and improve your PHP programming skills in the process?by learning how to use design patterns in your code. This book shows you how to apply several object-oriented patterns through simple examples, and demonstrates many of them in full-fledged working applications. Learn how these reusable patterns help you solve complex problems, organize object-oriented code, and revise a big project by only changing small parts. With Learning PHP Design Patterns, you?ll learn how to adopt a more sophisticated programming style and dramatically reduce development time. * Learn design pattern concepts, including how to select patterns to handle specific problems * Get an overview of object-oriented programming concepts such as composition, encapsulation, polymorphism, and inheritance * Apply creational design patterns to create pages dynamically, using a factory method instead of direct instantiation * Make changes to existing objects or structure without having to change the original code, using structural design patterns * Use behavioral patterns to help objects work together to perform tasks * Interact with MySQL, using behavioral patterns such as Proxy and Chain of Responsibility * Explore ways to use PHP?s built-in design pattern interfaces
Until now, design patterns for the MapReduce framework have been scattered among various research papers, blogs, and books. This handy guide brings together a unique collection of valuable MapReduce patterns that will save you time and effort regardless of the domain, language, or development framework you?re using. Each pattern is explained in context, with pitfalls and caveats clearly identified to help you avoid common design mistakes when modeling your big data architecture. This book also provides a complete overview of MapReduce that explains its origins and implementations, and why design patterns are so important. All code examples are written for Hadoop. * Summarization patterns: get a top-level view by summarizing and grouping data * Filtering patterns: view data subsets such as records generated from one user * Data organization patterns: reorganize data to work with other systems, or to make MapReduce analysis easier * Join patterns: analyze different datasets together to discover interesting relationships * Metapatterns: piece together several patterns to solve multi-stage problems, or to perform several analytics in the same job * Input and output patterns: customize the way you use Hadoop to load or store data ´´A clear exposition of MapReduce programs for common data processing patterns?this book is indespensible for anyone using Hadoop.´´ --Tom White, author of Hadoop: The Definitive Guide
Data Science Design Patterns brings together several dozen proven patterns for building successful decision-support and decision-automation systems in the enterprise. Like Martin Fowler´s classic Patterns of Enterprise Application Architecture, it helps you rapidly hone in on proven solutions to common problems, leveraging the hard-won expertise of those who have come before you. Todd Morley helps you draw upon and integrate diverse domains including statistics, machine learning, information retrieval, compression, optimization, and other areas of software development and business consulting. His patterns address many common challenges, including categorization, prediction, optimization, testing, and human factors. They link directly to key goals for data science and analytics: increasing revenue, decreasing costs, reducing risk, choosing strategies, and making key decisions. Each pattern offers a high-level design for an application module or layer that either directly solves an enterprise-scale data science problem, or offers a higher-level approach to solving it. Throughout, Morley presents wide-ranging examples, links to real-world case studies, and extensive bibliographic references for deepening your understanding. This guide´s patterns will substantially shorten the learning curve faced by software developers, architects, and IT professionals who have limited mathematical background, and are tasked with solving large-scale data science business problems. They will be equally valuable to experienced data scientists interested in applying best practices to become even more effective.
Dieses Lehrbuch des international bekannten Autors und Software-Entwicklers Craig Larman ist ein Standardwerk zur objektorientierten Analyse und Design unter Verwendung von UML 2.0 und Patterns. Das Buch zeichnet sich insbesondere durch die Fähigkeit des Autors aus, komplexe Sachverhalte anschaulich und praxisnah darzustellen. Der Leser erhält grundlegende OOA/D-Fertigkeiten sowie umfassende Erläuterungen zur iterativen Entwicklung und zum Unified Process (UP). Anschließend werden zwei Fallstudien vorgestellt, anhand derer die einzelnen Analyse- und Designprozesse des UP in Form einer Inception-, Elaboration- und Construction-Phase durchgespielt werden. Der Leser wird Schritt für Schritt mit Use Case- und Domänenmodellen vertraut gemacht und lernt, wie er diese mit UML-Diagrammen visualisieren kann. Darüber hinaus wird der Objektentwurf anhand von Patterns, insbesondere die ´´Gang of Four´´-Patterns und GRASP, erläutert. Zudem erfährt der Leser, wie er aus seinen Diagrammen Klassendefinitionen und Methoden ableiten und schließlich in Code umsetzen kann. Hierbei werden UML und Patterns im Kontext des Softwareentwicklungsprozesses nicht nur erläutert, sondern insbesondere auch konkret und praxisnah angewendet. Auch weiterführende Analyse- und Designthemen, wie z.B. Zustandsmodellierung, Paketdesign und Architekturanalyse, werden besprochen.
A recent survey stated that 52% of embedded projects are late by 4-5 months. This book can help get those projects in on-time with design patterns. The author carefully takes into account the special concerns found in designing and developing embedded applications specifically concurrency, communication, speed, and memory usage. Patterns are given in UML (Unified Modeling Language) with examples including ANSI C for direct and practical application to C code. A basic C knowledge is a prerequisite for the book while UML notation and terminology is included. General C programming books do not include discussion of the contraints found within embedded system design. The practical examples give the reader an understanding of the use of UML and OO (Object Oriented) designs in a resource-limited environment. Also included are two chapters on state machines. The beauty of this book is that it can help you today. . Design Patterns within these pages are immediately applicable to your project Addresses embedded system design concerns such as concurrency, communication, and memory usage Examples contain ANSI C for ease of use with C programming code