Versioning in an Event Sourced System
Versioning in an Event Sourced System
$5.00
Minimum price
$12.99
Suggested price
Versioning in an Event Sourced System

This book is 90% complete

Last updated on 2017-04-09

About the Book

About the Author

Table of Contents

  • Status
    • Goals
    • Feedback
    • Status
  • Why Version?
  • Why can’t I update an event?
    • Immutability
    • Consumers
    • Audit
    • Worms
    • Crime
  • Basic Type Based Versioning
    • Getting Started
    • Define a Version of an Event
    • Double Write
    • But…
  • Weak Schema
    • Mapping
    • Wrapper
    • Overall Considerations
  • Negotiation
    • Atom
    • Move Negotiation Forward
    • How to Translate
    • Use with Structural Data
  • General Versioning Concerns
    • Versioning of Behaviour
    • Changing Semantic Meaning
    • Snapshots
    • Avoid ‘And’
  • Whoops, I Did It Again
    • Accountants Use Pens
    • Types of Compensating Actions
    • How Do I Find What Needs Fixing?
    • More Complex Example
    • But I Really Screwed Up
  • Copy and Replace
    • Simple Copy-Replace
    • Simple>
    • With a System Live
    • Stream Boundaries are Wrong
    • Changing Stream Boundaries on a Running System
  • Cheating
    • Two Aggregates, One Stream
    • One Aggregate, Two Streams
    • Copy-Transform
    • Versioning Bankrupty
  • Internal vs External Models
    • External Integrations
    • Granularity
    • Rate of Change
    • How to Implement
    • Summary
  • Versioning Process Managers
    • Procees Managers
    • Basic Versioning
    • Upcasting State
    • Take Over
    • Warning

Causes Supported

Code Club

https://www.codeclub.org.uk

A nationwide network of volunteer-led after school coding clubs for children aged 9-11.

We create projects for our volunteers to teach at after school coding clubs or at non-school venues such as libraries. The projects we make teach children how to program by showing them how to make computer games, animations and websites. Our volunteers go to their local club for an hour a week and teach one project a week. Each term the students will progress and learn more whilst at the same time using their imaginations and making creative projects. Terms 1 & 2 use Scratch to teach the basics of programming. Term 3 teaches the basics of web development using HTML and CSS. Term 4 teaches Python and so on. We’d like to put a Code Club in every single primary school in the country. There are over 21,000 primary schools in the UK, it’s a big task but we think we can do it!

The Leanpub 45-day 100% Happiness Guarantee

Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

See full terms

Free Updates. Free App. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets), MOBI (for Kindle) and in the free Leanpub App (for Mac, Windows, iOS and Android). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

Authors, publishers and universities use Leanpub to publish amazing in-progress and completed books and courses, just like this one. You can use Leanpub to write, publish and sell your book or course as well! Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks. Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. It really is that easy.

Learn more about writing on Leanpub