Home > Store

Strategic Monoliths and Microservices: Driving Innovation Using Purposeful Architecture

eBook (Watermarked)

  • Your Price: $29.43
  • List Price: $36.79
  • Includes EPUB and PDF
  • About eBook Formats
  • This eBook includes the following formats, accessible from your Account page after purchase:

    ePub EPUB The open industry format known for its reflowable content and usability on supported mobile devices.

    Adobe Reader PDF The popular standard, used most often with the free Acrobat® Reader® software.

    This eBook requires no passwords or activation to read. We customize your eBook by discreetly watermarking it with your name, making it uniquely yours.

Also available in other formats.

Register your product to gain access to bonus material or receive a coupon.



  • Make informed microservices architecture choices optimized to serve all stakeholders 
  • Presents balanced coverage of making the most of both monoliths and microservices depending on the requirements and goals of each project
  • Lead authored by Vaughn Vernon, one of the worldwide leading experts in software architecture 
  • The first title from the new Vaughn Vernon Signature Series from AW on advancing software development maturity and implementing business-centric practices for greater success 


  • Copyright 2022
  • Pages: 352
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 0-13-735551-3
  • ISBN-13: 978-0-13-735551-8

Make Software Architecture Choices That Maximize Value and Innovation

"[Vernon and Jaskua] provide insights, tools, proven best practices, and architecture styles both from the business and engineering viewpoint. . . . This book deserves to become a must-read for practicing software engineers, executives as well as senior managers."
--Michael Stal, Certified Senior Software Architect, Siemens Technology
Strategic Monoliths and Microservices helps business decision-makers and technical team members clearly understand their strategic problems through collaboration and identify optimal architectural approaches, whether the approach is distributed microservices, well-modularized monoliths, or coarser-grained services partway between the two.

Leading software architecture experts Vaughn Vernon and Tomasz Jaskua show how to make balanced architectural decisions based on need and purpose, rather than hype, so you can promote value and innovation, deliver more evolvable systems, and avoid costly mistakes. Using realistic examples, they show how to construct well-designed monoliths that are maintainable and extensible, and how to gradually redesign and reimplement even the most tangled legacy systems into truly effective microservices.
  • Link software architecture planning to business innovation and digital transformation
  • Overcome communication problems to promote experimentation and discovery-based innovation
  • Master practices that support your value-generating goals and help you invest more strategically
  • Compare architectural styles that can lead to versatile, adaptable applications and services
  • Recognize when monoliths are your best option and how best to architect, design, and implement them
  • Learn when to move monoliths to microservices and how to do it, whether they're modularized or a "Big Ball of Mud"
Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.


Author's Site

Please visit the authors' sites at http://kalele.io and http://luteceo.com.

Sample Content

Sample Pages

Download the sample pages (includes Chapter 1)

Table of Contents

Foreword xiii
Preface xvii
Acknowledgments xxv
About the Authors xxxi

Part I: Transformational Strategic Learning through Experimentation 1

Executive Summary 3

Chapter 1: Business Goals and Digital Transformation 7
Digital Transformation: What Is the Goal? 8
Why Software Goes Wrong 11
Your Enterprise and Conway's Law 18
(Re)Thinking Software Strategy 24
Are Monoliths Bad? 30
Are Microservices Good? 31
Don't Blame Agile 34
Getting Unstuck 36
Summary 37
References 38

Chapter 2: Essential Strategic Learning Tools 39

Making Decisions Early and Late, Right and Wrong 40
Culture and Teams 43
Modules First 51
Deployment Last 55
Everything in Between 57
Where Is Your Spaghetti and How Fast Does It Cook? 70
Strategic Architecture 70
Applying the Tools 72
Summary 75
References 75

Chapter 3: Events-First Experimentation and Discovery 77
Commands and Events 78
Rapid Learning with EventStorming 81
Applying the Tools 92
Summary 99
References 100

Part II: Driving Business Innovation 101

Executive Summary 103

Chapter 4: Reaching Domain-Driven Results 109
Domains and Subdomains 111
Summary 115
References 116

Chapter 5: Contextual Expertise 117
Bounded Context and Ubiquitous Language 117
Core Domain 121
Supporting Subdomains, Generic Subdomains, and Technical Mechanisms 123
Business Capabilities and Contexts 125
Not Too Big, Not Too Small 128
Summary 129
References 130

Chapter 6: Mapping, Failing, and Succeeding--Choose Two 131

Context Mapping 131
Topography Modeling 151
Ways to Fail and Succeed 154
Applying the Tools 158
Summary 163
References 164

Chapter 7: Modeling Domain Concepts 165
Entities 166
Value Objects 167
Aggregates 168
Domain Services 169
Functional Behavior 170
Applying the Tools 173
Summary 173
References 174

Part III: Events-First Architecture 175

Executive Summary 177

Chapter 8: Foundation Architecture 181
Architectural Styles, Patterns, and Decision Drivers 183
Quality Attributes 196
Applying the Tools 206
Summary 207
References 208

Chapter 9: Message- and Event-Driven Architectures 211
Message- and Event-Based REST 216
Event-Driven and Process Management 220
Event Sourcing 223
CQRS 227
Serverless and Function as a Service 229
Applying the Tools 231
Summary 231
References 232

Part IV: The Two Paths for Purposeful Architecture 233

Executive Summary 235
Chapter 10: Building Monoliths Like You Mean It 239
Historical Perspective 241
Right from the Start 244
Right from Wrong 253
Keeping It Right 264
Summary 265
References 266

Chapter 11: Monolith to Microservices Like a Boss 267
Mental Preparation with Resolve 267
Modular Monolith to Microservices 271
Big Ball of Mud Monolith to Microservices 275
Unplugging the Legacy Monolith 286
Summary 287
References 288

Chapter 12: Require Balance, Demand Strategy 289
Balance and Quality Attributes 289
Strategy and Purpose 291
Conclusion 297
References 298

Index 299



We've made every effort to ensure the accuracy of this book and its companion content. Any errors that have been confirmed since this book was published can be downloaded below.

Download the errata (936 KB .doc)

Download replacement Figure 7-1 (359 KB .png)

Submit Errata

More Information

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information

To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.


Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.


If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information

Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.


This site is not directed to children under the age of 13.


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information

If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information

Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents

California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure

Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact

Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice

We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020