Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Event sourcing in Laravel (full stack brussels)
Search
Freek Van der Herten
April 04, 2019
Programming
1
320
Event sourcing in Laravel (full stack brussels)
Freek Van der Herten
April 04, 2019
Tweet
Share
More Decks by Freek Van der Herten
See All by Freek Van der Herten
Uncharted packages (Laravel Live Denmark)
freekmurze
0
200
I shall define this only once
freekmurze
0
400
An Introduction to Snapshot testing
freekmurze
0
490
Event Sourcing In Laravel
freekmurze
0
250
Building a realtime dashboard with Laravel Livewire (PHPKonf)
freekmurze
0
800
A tour behind the scenes of Oh Dear (PHP Benelux)
freekmurze
2
850
A practical look at multitenancy in Laravel
freekmurze
1
350
A practical look at multitenancy in Laravel (Laracon US)
freekmurze
0
720
Highlights Flare codebase (Laracon online)
freekmurze
0
500
Other Decks in Programming
See All in Programming
Result型で“失敗”を型にするPHPコードの書き方
kajitack
4
270
来たるべき 8.0 に備えて React 19 新機能と React Router 固有機能の取捨選択とすり合わせを考える
oukayuka
2
840
Julia という言語について (FP in Julia « SIDE: F ») for 関数型まつり2025
antimon2
3
980
明示と暗黙 ー PHPとGoの インターフェイスの違いを知る
shimabox
2
280
Go1.25からのGOMAXPROCS
kuro_kurorrr
1
800
Effect の双対、Coeffect
yukikurage
5
1.4k
Railsアプリケーションと パフォーマンスチューニング ー 秒間5万リクエストの モバイルオーダーシステムを支える事例 ー Rubyセミナー 大阪
falcon8823
4
910
地方に住むエンジニアの残酷な現実とキャリア論
ichimichi
5
1.3k
datadog dash 2025 LLM observability for reliability and stability
ivry_presentationmaterials
0
110
Gleamという選択肢
comamoca
6
760
XSLTで作るBrainfuck処理系
makki_d
0
210
ASP.NETアプリケーションのモダナイズ インフラ編
tomokusaba
1
410
Featured
See All Featured
Producing Creativity
orderedlist
PRO
346
40k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
33
5.9k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
130
19k
Optimizing for Happiness
mojombo
379
70k
Practical Orchestrator
shlominoach
188
11k
The Pragmatic Product Professional
lauravandoore
35
6.7k
Documentation Writing (for coders)
carmenintech
71
4.9k
Stop Working from a Prison Cell
hatefulcrawdad
270
20k
The World Runs on Bad Software
bkeepers
PRO
69
11k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3k
Testing 201, or: Great Expectations
jmmastey
42
7.5k
Transcript
Getting started with event sourcing in Laravel
About me Freek Van der Herten Partner & developer at
Spatie @freekmurze https://murze.be https://ohdear.app
Spatie Since 2003 Websites, applications and webshops Team 9 awesome
human beings Specialisation Laravel, front-end development
Open Source Software
We create a lot of it ± 200 packages on
Packagist ± 2,000,000 downloads a month ± 30,000,000 total downloads All Postcardware!
Highlights Popular laravel-backup laravel-medialibrary laravel-permission New laravel-query-builder laravel-blade-x
https://spatie.be/open-source
https://spatie.be/open-source/postcards
Let's talk about event sourcing
Talk overview Theory Laravel Event Projector demo Eventsauce demo
Theory
Traditional application Write data in database An update means overwriting
the old data The old data cannot be accessed anymore
APPLICATION DATABASE TABLE value X
APPLICATION DATABASE TABLE value X value Y
Event Sourced Application The application will fire off events Events
will get written in a dedicated store Events are passed to consumers that create projections Aggregate, Aggregate Root...
APP EVENTS Event Event 1
APP EVENTS Event Event 1 Event 2
APP EVENTS Event Event 1 Event 2 Event 3
APP CONSUMER EVENTS PROJECTION Event Event 1 Event 2 Event
3
APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event
2 Event 3 ANOTHER PROJECTION
APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event
2 Event 3 ANOTHER PROJECTION
APP CONSUMER CONSUMER 2 EVENTS PROJECTION Event Event 1 Event
2 Event 3 Event 4 ANOTHER PROJECTION
Event Sourced Application Auditing requirements Extra reports needed Recording the
unhappy path There is some setup required
Laravel Event Projector
Laravel Event Projector Package made by Spatie It's not full
event sourcing, it focuses on projections Beautifully integrated into Laravel Easy to get started with
https://docs.spatie.be/laravel-event-projector
Demo
Eventsauce
Eventsauce Package made by Frank De Jonge Focuses on aggregates
Framework agnostic Separate Laravel bindings package available Very powerful, adds complexity
https://eventsauce.io/docs/
APP Subtract $1000
AGGREGATE ROOT REPOSITORY UUID PAYLOAD TIME APP Subtract $1000
AGGREGATE ROOT REPOSITORY UUID PAYLOAD TIME APP Subtract $1000 RETRIEVE
Subtract $1000 AGGREGATE ROOT (empty)
AGGREGATE ROOT REPOSITORY ABC-123 Subtract 1000 11:12 AM UUID PAYLOAD
TIME APP Subtract $1000 RETRIEVE Subtract $1000 AGGREGATE ROOT ACCOUNTS CONSUMER -$1000 (empty) PERSIST
AGGREGATE ROOT REPOSITORY ABC-123 Subtract 1000 11:12 AM UUID PAYLOAD
TIME APP RETRIEVE Subtract $750 AGGREGATE ROOT ACCOUNTS -$1000 CONSUMER Subtract $750 Subtract $1000 PERSIST
AGGREGATE ROOT REPOSITORY ABC-123 Subtract 1000 11:12 AM ABC-124 Subtract
750 01:17 PM UUID PAYLOAD TIME APP RETRIEVE Subtract $750 AGGREGATE ROOT ACCOUNTS -$1750 CONSUMER Subtract $750 Subtract $1000 PERSIST
AGGREGATE ROOT REPOSITORY ABC-123 Subtract 1000 11:12 AM ABC-124 Subtract
750 01:17 PM UUID PAYLOAD TIME APP RETRIEVE AGGREGATE ROOT ACCOUNTS -$1750 CONSUMER Subtract $1250 Subtract $1000 Subtract $750 Subtract $1250 More Money Needed PERSIST
AGGREGATE ROOT REPOSITORY ABC-123 Subtract 1000 11:12 AM ABC-124 Subtract
750 01:17 PM ABC-125 Subtract 1250 05:51 PM ABC-126 More Money Needed 05:51 PM UUID PAYLOAD TIME ACCOUNTS APP CONSUMER CONSUMER 2 PROPOSED LOANS Subtract $1250 -$3000 RETRIEVE PERSIST Subtract $1000 Subtract $750 Subtract $1250 More Money Needed AGGREGATE ROOT
Demo
In closing
Summary Laravel Event Projector Easy to use package to get
started with projections Hooks into Laravel's native events Replay capabilities No aggregates
Summary EventSauce Framework agnostic Support for aggregates, process modelling No
replay capabilities out of the box https://github.com/spatie/laravel-eventsauce
Writes are harder, reads are easier
Event sourcing makes the easy things harder… …and the harder
things easier — Frank De Jonge
Larabank https://github.com/spatie/larabank-traditional https://github.com/spatie/larabank-event-projector https://github.com/spatie/larabank-eventsauce
Resources https://kickstarter.engineering/event-sourcing-made-simple-4a2625113224 https://github.com/spatie/laravel-event-projector https://github.com/eventsaucephp/eventsauce https://github.com/prooph
Thank you! https://speakerdeck.com/freekmurze/event-sourcing-full-stack-brussels https://spatie.be/open-source https://murze.be https://ohdear.app