Rabu, 09 Juli 2014

[K107.Ebook] Free Ebook Implementing Domain-Driven Design, by Vaughn Vernon

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Implementing Domain-Driven Design, by Vaughn Vernon

Implementing Domain-Driven Design, by Vaughn Vernon



Implementing Domain-Driven Design, by Vaughn Vernon

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Implementing Domain-Driven Design, by Vaughn Vernon

“For software developers of all experience levels looking to improve their results, and design and implement domain-driven enterprise applications consistently with the best current state of professional practice, Implementing Domain-Driven Design will impart a treasure trove of knowledge hard won within the DDD and enterprise application architecture communities over the last couple decades.”

–Randy Stafford, Architect At-Large, Oracle Coherence Product Development

“This book is a must-read for anybody looking to put DDD into practice.”

–Udi Dahan, Founder of NServiceBus

Implementing Domain-Driven Design presents a top-down approach to understanding domain-driven design (DDD) in a way that fluently connects strategic patterns to fundamental tactical programming tools. Vaughn Vernon couples guided approaches to implementation with modern architectures, highlighting the importance and value of focusing on the business domain while balancing technical considerations.

Building on Eric Evans’ seminal book, Domain-Driven Design, the author presents practical DDD techniques through examples from familiar domains. Each principle is backed up by realistic Java examples–all applicable to C# developers–and all content is tied together by a single case study: the delivery of a large-scale Scrum-based SaaS system for a multitenant environment.

The author takes you far beyond “DDD-lite” approaches that embrace DDD solely as a technical toolset, and shows you how to fully leverage DDD’s “strategic design patterns” using Bounded Context, Context Maps, and the Ubiquitous Language. Using these techniques and examples, you can reduce time to market and improve quality, as you build software that is more flexible, more scalable, and more tightly aligned to business goals.

Coverage includes

  • Getting started the right way with DDD, so you can rapidly gain value from it
  • Using DDD within diverse architectures, including Hexagonal, SOA, REST, CQRS, Event-Driven, and Fabric/Grid-Based
  • Appropriately designing and applying Entities–and learning when to use Value Objects instead
  • Mastering DDD’s powerful new Domain Events technique
  • Designing Repositories for ORM, NoSQL, and other databases

  • Sales Rank: #62818 in Books
  • Published on: 2013-02-16
  • Original language: English
  • Number of items: 1
  • Dimensions: 9.20" h x 1.60" w x 7.20" l, 2.58 pounds
  • Binding: Hardcover
  • 656 pages

Review
“With Implementing Domain-Driven Design , Vaughn has made an important contribution not only to the literature of the Domain-Driven Design community, but also to the literature of the broader enterprise application architecture field. In key chapters on Architecture and Repositories, for example, Vaughn shows how DDD fits with the expanding array of architecture styles and persistence technologies for enterprise applications—including SOA and REST, NoSQL and data grids—that has emerged in the decade since Eric Evans’ seminal book was first published. And, fittingly, Vaughn illuminates the blocking and tackling of DDD—the implementation of entities, value objects, aggregates, services, events, factories, and repositories—with plentiful examples and valuable insights drawn from decades of practical experience. In a word, I would describe this book as thorough. For software developers of all experience levels looking to improve their results, and design and implement domain-driven enterprise applications consistently with the best current state of professional practice, Implementing Domain-Driven Design will impart a treasure trove of knowledge hard won within the DDD and enterprise application architecture communities over the last couple decades.”

—Randy Stafford, Architect At-Large, Oracle Coherence Product Development


“Domain-Driven Design is a powerful set of thinking tools that can have a profound impact on how effective a team can be at building software-intensive systems. The thing is that many developers got lost at times when applying these thinking tools and really needed more concrete guidance. In this book, Vaughn provides the missing links between theory and practice. In addition to shedding light on many of the misunderstood elements of DDD, Vaughn also connects new concepts like Command/Query Responsibility Segregation and Event Sourcing that many advanced DDD practitioners have used with great success. This book is a must-read for anybody looking to put DDD into practice.”

—Udi Dahan, Founder of NServiceBus


“For years, developers struggling to practice Domain-Driven Design have been wishing for more practical help in actually implementing DDD. Vaughn did an excellent job in closing the gap between theory and practice with a complete implementation reference. He paints a vivid picture of what it is like to do DDD in a contemporary project, and provides plenty of practical advice on how to approach and solve typical challenges occurring in a project life cycle.”

— Alberto Brandolini, DDD Instructor, Certified by Eric Evans and Domain Language, Inc.


“Implementing Domain-Driven Design does a remarkable thing: it takes a sophisticated and substantial topic area in DDD and presents it clearly, with nuance, fun and finesse. This book is written in an engaging and friendly style, like a trusted advisor giving you expert counsel on how to accomplish what is most important. By the time you finish the book you will be able to begin applying all the important concepts of DDD, and then some. As I read, I found myself highlighting many sections . . . I will be referring back to it, and recommending it, often.”

— Paul Rayner, Principal Consultant & Owner, Virtual Genius, LLC., DDD Instructor, Certified by Eric Evans and Domain Language, Inc., DDD Denver Founder and Co-leader

“One important part of the DDD classes I teach is discussing how to put all the ideas and pieces together into a full blown working implementation. With this book, the DDD community now has a comprehensive reference that addresses this in detail. Implementing Domain-Driven Design deals with all aspects of building a system using DDD, from getting the small details right to keeping track of the big picture. This is a great reference and an excellent companion to Eric Evans seminal DDD book.”

— Patrik Fredriksson, DDD Instructor, Certified by Eric Evans and Domain Language, Inc.


“If you care about software craftsmanship—and you should—then Domain-Driven Design is a crucial skill set to master and Implementing Domain-Driven Design is the fast path to success. IDDD offers a highly readable yet rigorous discussion of DDD’s strategic and tactical patterns that enables developers to move immediately from understanding to action. Tomorrow’s business software will benefit from the clear guidance provided by this book.”

—Dave Muirhead, Principal Consultant, Blue River Systems Group


“There’s theory and practice around DDD that every developer needs to know, and this is the missing piece of the puzzle that puts it all together. Highly recommended!”

—Rickard �berg, Java Champion and Developer at Neo Technology


“In IDDD, Vaughn takes a top-down approach to DDD, bringing strategic patterns such as bounded context and context maps to the fore, with the building block patterns of entities, values and services tackled later. His book uses a case study throughout, and to get the most out of it you’ll need to spend time grokking that case study. But if you do you’ll be able to see the value of applying DDD to a complex domain; the frequent sidenotes, diagrams, tables, and code all help illustrate the main points. So if you want to build a solid DDD system employing the architectural styles most commonly in use today, Vaughn’s book comes recommended.”

—Dan Haywood, author of Domain-Driven Design with Naked Objects


“This book employs a top-down approach to understanding DDD in a way that fluently connects strategic patterns to lower level tactical constraints. Theory is coupled with guided approaches to implementation within modern architectural styles. Throughout the book, Vaughn highlights the importance and value of focusing on the business domain all while balancing technical considerations. As a result, the role of DDD, as well as what it does and perhaps more importantly doesn’t imply, become ostensibly clear. Many a time, my team and I would be at odds with the friction encountered in applying DDD. With Implementing Domain-Driven Design as our luminous guide we were able to overcome those challenges and translate our efforts into immediate business value.”

—Lev Gorodinski, Principal Architect, DrillSpot.com

About the Author
Vaughn Vernon is a veteran software craftsman with more than twenty-five years of experience in software design, development, and architecture. He is a thought leader in simplifying software design and implementation using innovative methods. He has been programming with object-oriented languages since the 1980s, and applying the tenets of Domain-Driven Design since his Smalltalk domain modeling days in the early 1990s. He consults and speaks internationally, and has taught his Implementing Domain-Driven Design classes on multiple continents.

Most helpful customer reviews

27 of 28 people found the following review helpful.
A book for every software architect and developer
By T Anderson
Agile is not easy and implementing Domain-Driven Design (DDD) is not easy. I think my favorite part of the book is that the author realizes that, and also has a realistic perspective on what it takes to successfully use agile processes and DDD.

The book starts out with a really nice overview of DDD. By the time you are done the first chapter you have a pretty good high level picture of what DDD is all about. One topic he really drives home is Ubiquitous Language.

Ubiquitous Language is a shared team language that defines a certain domain. When you are reading about Ubiquitous Language it may seem like something that just happens on its own. It isn't. An explicit domain language should be defined, it should not just be allowed to implicitly come about. This same concept has been around for years in Water Fall, Unified Process, RUP, and other processes. It has always been a very important part of the software development process, so don't discount it.

Chapter 1 also does a great job of providing tips on how to show the business value of using DDD. The author has a clear understanding that without the support of the business you aren't going to get very far with your project, and in order to get them onboard you need to show them what they will gain by supporting DDD.

The remaining chapters dig into the details of DDD. I have listed the chapters below. Their titles are pretty self-explanatory.

Chapter 1. Getting Started with DDD
Chapter 2. Domains, Subdomains, and Bounded Contexts
Chapter 3. Context Maps
Chapter 4. Architecture
Chapter 5. Entities
Chapter 6. Value Objects
Chapter 7. Services
Chapter 8. Domain Events
Chapter 9. Modules
Chapter 10. Aggregates
Chapter 11. Factories
Chapter 12. Repositories
Chapter 13. Integrating Bounded Contexts
Chapter 14. Application
Appendix A. Aggregates and Event Sourcing: A+ES

I have seen a lot of teams that could not build software with UP or RUP adopt Scrum in hopes that changing the process will make a difference. It never does. There are a variety of reasons including not doing any architecture, not having experienced developers with the right skill sets, not having the right business users involved, not having the requirements elicitation skills needed, and the list can go on and on. The author clearly understands Scrum is not a silver bullet. I mention this because DDD done correctly can give agile processes a much better chance at success, but you must have the skills on the team in order pull it off.

I was really glad to see the author included a chapter on architecture. The author does a great job of covering a ton of architectural styles and patterns. Patterns, styles, and topic found in the Architecture chapter include Layers Architecture with the Dependency Inversion Principle, Hexagonal Architecture, SOA environment, REST, Data Fabric, Grid-Based Distributed Cache, and CQRS.

Every chapter is an in depth look at the topic of the given chapter. I did not leave any of the chapters feeling like I missed something. I have read both Domain-Driven Design: Tackling Complexity in the Heart of Software and Patterns of Enterprise Application Architecture, and I had both handy for looking up references to them. It is not necessary to read them first, but it did help that I had.

I am not going to say using DDD is easy, but I will say this book can definitely get you to where you can successfully use it. The author's writing style is really good and he is good at making the book entertaining. I will however say this, be prepared to read the entire book if you want to get to that point of successfully using DDD. There is a lot to learn, but it is worth it.

I highly recommend this book to every software architect and developer. Even if you don't go all out DDD there is a ton of great advice and wisdom found in this book that will help you improve your skills.

17 of 17 people found the following review helpful.
Good content; verbose prose, slow read
By Kevin Clements
I have trouble balancing my appreciation for the conceptual material in this book with my dislike of the presentation and language.

There's enough good material in the book for me to convince myself I needed to plow through it to the end; the writing was such that I had to force myself to do it. I'd really like to read a copy of this that had had the benefit of a good editor. It was verbose, and tended to belabor points that I thought had been pretty clearly conveyed in a few pages, so it took a while to get through it.

It's a fairly thorough overview of the DDD space, and I think it filled in some things I didn't get from Evans earlier book. I do question some of the breezy assertions that it was almost always best to opt for the purety of the model over implementation concerns, particularly around doing implementations on top of RDBMS persistence.

I think it was worth the read, but in comparison to other technical books I've read (and I read a lot of them), it was a lot more work to get through the prose than I think it needed to be.

11 of 11 people found the following review helpful.
Best modern book for DDD
By vrto
DDD is definitely not getting the amount of attention it deserves. If you're new to DDD and thinking of reading a book that will introduce you DDD concepts, this is the right choice. It takes out the best from Evan's classic "Domain Driven Design" and mixes in some modern concepts and advices for pragmatic DDD or overall architecture.

This book explains DDD concepts on well-chosen domain problem - agile and SCRUM. Reader (who is very likely to have at least some experience with SCRUM) is going to feel comfortable with most of the examples that this book provides.

Another huge plus is that author stays pragmatic. Author knows that DDD touches lot of 'theoretical' concepts, so he often mentions real-world situations and advises how to compromise certain situations - how can be DDD fully or not-so-fully utilised within your business. If you're afraid of 'too many abstractions' then don't be - peek into table of contents and you will see that author explains DDD on very real and quite recent technologies/buzzwords like REST, CQCS, Hexagonal Architecture etc. Author also assumes that reader is rather new to the whole DDD thing and patiently explains things you were 'afraid to ask', like "What's the difference between DAO and Repository?", "Is it OK to put fine-grained queries to DAO and return Value Objects?" etc.

On the other hand - what's not so great about this book is its verbosity. I don't mind repeating important concepts (redundancy can be useful as we know it from Head First books for example), but I often felt like reading a novel. If I wanted to read a novel, I would buy a novel. Technical books should be brief and precise. I had the feeling that it was happening too often that author went too deep into the problem and I simply got bored way too many times. I think the useful content of this book would comfortably fit into 60% of its length.

Last, but not least, I'd like to exalt the book structure and formatting which was really good. Even Kindle versions gets properly formatted source code, which (unfortunately) still isn't standard.

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