book

Component-Based Rails Applications: Large Domains Under Control

Name: Component-Based Rails Applications: Large Domains Under Control
Author: Stephan Hagemann
ISBN: 9780134775241

by Stephan Hagemann

June 2018

Intermediate to advanced

304 pages

8h 29m

English

Addison-Wesley Professional

Read now

Unlock full access

Cover Page
Title Page
Copyright Page
Contents
About This E-Book
Foreword
Preface
Acknowledgments
About the Author
Dedication

Chapter 1 Introduction to Component-Based Rails Applications
1.1 Component-Based Rails1.1.1 What Component-Based Rails Is1.2 Benefits of Component-Based Applications1.2.1 Improved Communication of Intent1.2.2 Improved Collaboration Among Developers1.2.3 Improved Creation of Features1.2.4 Improved Maintenance of the Application1.2.5 Improved Comprehension of Application Parts1.2.6 History Repeating?1.3 Component-Based Ruby1.4 The Application Continuum1.5 Related Works
Chapter 2 Creating a Component-Based Application
2.1 The Entire App Inside a Component2.2 ActiveRecord and Handling Migrations within Components2.2.1 Installing Engine Migrations with Rake2.2.2 Loading Engine Migrations in Place2.2.3 Known Issues2.3 Handling Dependencies within Components2.3.1 Using path Blocks for Specifying CBRA Dependencies2.3.2 Adding a Regular Gem: slim—Different Templating2.3.3 Locking Down Gem Versions2.3.4 Adding the Development Version of a Gem: Trueskill—A Rating Calculation Library2.3.5 Adding Predictions to the App
Chapter 3 Tooling for Components
3.1 Testing a Component3.1.1 ActiveRecord Model Specs3.1.2 Non-ActiveRecord Model Specs3.1.3 Controller Specs3.1.4 Helper Specs3.1.5 Feature Specs3.2 Testing the Main Application3.2.1 What to Test in the Main App3.2.2 How to Put Everything Together3.2.3 How to Set Up a Continuous Integration (CI) Server3.3 Asset Loading for Components3.3.1 Production-Ready Assets3.4 Switching Databases3.5 Deploying to Platforms-as-a-Service3.5.1 Deploying to Heroku3.5.2 Deploying to Pivotal Web Services3.6 Updating Application Dependencies3.6.1 Updating the Bundle in All Components3.6.2 Updating Every Component’s Gem Version3.6.3 Updating Rails3.6.4 Long-Running Dependency Updates3.6.5 Listing a Dependency Only Once3.7 Proposal for a Different Application Root—Showcasing the Difference of Components’ Structure3.7.1 Why Would I Want to Change That?3.7.2 How CBRA Can Change How I Present and Perceive My App3.7.3 Making CI and PaaS Work with the New Structure3.7.4 What Is Next?
Chapter 4 Component Refactorings: Extracting Components out of Components
4.1 Determining What to Extract: Bottom-Up4.2 Refactoring: Extract Domain Gem—Predictor4.2.1 Fixing Inside-Out: Making AppComponent Work Again4.2.2 Last Step: Ensure That the App Works4.2.3 Summary of Bottom-Up Component Extractions4.3 Determining What to Extract: Top-Down4.3.1 Unclear Dependency Direction4.3.2 Not Everything Needs Predictor4.3.3 Implications of the First Set of Extractions4.3.4 Problem with the Current Solution4.3.5 Reducing Needed Dependencies4.4 Refactoring: Pulling Up a UI Component—TeamsAdmin, GamesAdmin, PredictionUI, WelcomeUI4.4.1 Generate4.4.2 Move4.4.3 Fix, Part 1: Reusing Test Helpers4.4.4 Fix, Part 2: Routing Issues4.4.5 Fix, Part 3: The Container Application4.4.6 An Explicitly Contracted Global Navigation4.5 Refactoring: Pushing Down a Model Component—Teams, Games4.5.1 Getting Away with Less4.5.2 Fixing Teams Tests4.5.3 Fixing Everything Else4.6 Refactoring: Improve Naming of Component—AppComponent to WebUI4.6.1 Whatever Happened to AppComponent?4.6.2 Refactoring Component Names4.6.3 Refactoring a Component Name Throughout the Application4.6.4 An Even More Mechanical Approach4.7 More Component Refactoring Patterns4.7.1 Splitting One Component in Two: Disentangling Unrelated Concepts4.7.2 API Component4.7.3 Third-Party Service Adapter4.7.4 Common Functionality Component
Chapter 5 From Ball of Mud to First Components
5.1 Small Steps5.2 One Big Step5.2.1 Prerequisites5.2.2 Script This!5.2.3 A Scripted Refactoring5.2.4 Cleaning Up Persistence5.2.5 Using Persistence5.2.6 Summary
Chapter 6 Component-Based Rails in Relation to Other Patterns
6.1 Hexagonal Architecture6.1.1 Hexagonal Architecture and CBRA6.1.2 Implementing Hexagonal Rails with CBRA6.1.3 Teasing Out an Adapter in the Frontend6.1.4 A Repository for Data Storage6.1.5 Swappable Data Storage6.1.6 Summary6.2 Data-Context-Integration (DCI)6.2.1 DCI and CBRA6.2.2 Implementing DCI with CBRA6.2.3 Summary
Chapter 7 Components in Other Languages
7.1 Kotlin, Java, and Gradle7.2 .NET / C7.3 Conclusion
Appendix
A.1 Plain versus --full versus --mountable EnginesA.1.1 GemA.1.2 Plain PluginA.1.3 Full EngineA.1.4 Mountable EngineA.2 How Do Engine Routes and Engine Mounting Work?A.2.1 Engines as SubdomainsA.2.2 Engines Are (Unfortunately) SingletonsA.3 Additional Testing with Older Versions of RailsA.3.1 View SpecsA.3.2 Routing Specs
Index
Code Snippets

Content preview from Component-Based Rails Applications: Large Domains Under Control

Acknowledgments

No matter how I wrote this book, it certainly would not have gotten written at all without the help of many.

First, I would like to thank the reviewers who helped me improve on previous versions of the book: Barrett Clark, Paul Ort, Tammer Saleh, and Obie Fernandez. I would like to thank Chris Zahn for making sure that the book meets Pearson’s publishing standards. Big thanks go to Debra Williams Cauley for working with me on the entire publishing process over the past year. Thanks to Julie Nahil and Dhayanidhi Karunanidhi for getting the book produced and proofed.

I would like to thank all those discussing component-based Rails applications with me on conferences and especially in the CBRA discussion group (https://groups.google.com/forum/#!topic/components-in-rails ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.

Julian F.

Head of Cybersecurity

I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.

Addison B.

Field Engineer

I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.

Amir M.

Data Platform Tech Lead

I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.

Mark W.

Embedded Software Engineer

Learn Rails 6: Accelerated Web Development with Ruby on Rails

Publisher Resources

ISBN: 9780134774596

Cloud Computing

Data Engineering

Data Science

AI & ML

Programming Languages

Software Architecture

IT/Ops

Security

Design

Business

Soft Skills

Component-Based Rails Applications: Large Domains Under Control

by Stephan Hagemann

Acknowledgments

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.