Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Reengineering

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for Nat Pryce Nat Pryce
January 22, 2017
Programming
210
0

 Reengineering

A case study presented to 4th year students at Imperial College

Avatar for Nat Pryce

Nat Pryce

January 22, 2017

More Decks by Nat Pryce

See All by Nat Pryce
Mistakes we made adopting event sourcing (and how we recovered)
Avatar for Nat Pryce npryce
3
1.2k
Failure is not an Option. Error handling strategies for Kotlin programs
Avatar for Nat Pryce npryce
0
640
Taking the Tiger by the Tail, P3X 2019
Avatar for Nat Pryce npryce
1
240
What we talk about when we talk about software, Agile Turkey Summit 2019
Avatar for Nat Pryce npryce
2
460
The Kotlin Type Hierarchy From Top to Bottom
Avatar for Nat Pryce npryce
7
3.5k
What we talk about when we talk about software
Avatar for Nat Pryce npryce
3
420
Why software changes & how we must change what we change when we change software
Avatar for Nat Pryce npryce
1
310
What we talk about when we talk about software
Avatar for Nat Pryce npryce
1
710
Having Our Cake and Eating It
Avatar for Nat Pryce npryce
4
1.5k

Other Decks in Programming

See All in Programming
Go_College_最終発表資料__外部公開用_.pdf
Avatar for xe-pc23 xe_pc23
0
120
Symfonyの特性(設計思想)を手軽に活かす特性(trait)
Avatar for ICKX ickx
0
120
夢の無限スパゲッティ製造機 -実装篇- #phpstudy
Avatar for hideki kinjyo o0h
PRO
0
190
Symfony + NelmioApiDocBundle を使った スキーマ駆動開発 / Schema Driven Development with NelmioApiDocBundle
Avatar for Shohei Okada okashoi
0
260
The free-lunch guide to idea circularity
Avatar for Holly Cummins hollycummins
0
410
実践ハーネスエンジニアリング #MOSHTech
Avatar for Takuma Kajikawa kajitack
7
5.6k
今年もTECHSCOREブログを書き続けます！
Avatar for 平奥真一（ひらおくしんいち） hiraoku101
0
220
PHP でエミュレータを自作して Ubuntu を動かそう
Avatar for memory m3m0r7
PRO
2
170
GoのDB アクセスにおける 「型安全」と「柔軟性」の両立 - Bob という選択肢
Avatar for tak tak848
0
310
モックわからないマン卒業記 ~振る舞いを起点に見直した、フロントエンドテストにおけるモックの使いどころ~
Avatar for Tasuku Watanabe tasukuwatanabe
3
440
飯MCP
Avatar for Yusuke Wada yusukebe
0
480
「速くなった気がする」をデータで疑う
Avatar for Leaf senleaf24
0
140

Featured

See All Featured
The Impact of AI in SEO - AI Overviews June 2024 Edition
Avatar for Aleyda Solis aleyda
5
780
Practical Tips for Bootstrapping Information Extraction Pipelines
Avatar for Matthew Honnibal honnibal
25
1.8k
Visualization
Avatar for Eitan Lees eitanlees
150
17k
Joys of Absence: A Defence of Solitary Play
Avatar for Sebastian Deterding codingconduct
1
330
The innovator’s Mindset - 
Leading Through an Era of Exponential Change - McGill University 2025
Avatar for Jean-Marc De Jonghe jdejongh
PRO
1
140
SEOcharity - Dark patterns in SEO and UX: How to avoid them and build a more ethical web
Avatar for Sara Fernández Carmona sarafernandez
0
160
Fashionably flexible responsive web design (full day workshop)
Avatar for Andy Clarke malarkey
408
66k
Pawsitive SEO: Lessons from My Dog (and Many Mistakes) on Thriving as a Consultant in the Age of AI
Avatar for David Carrasco davidcarrasco
0
110
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
Avatar for Rebecca Miller-Webster rmw
35
3.4k
Darren the Foodie - Storyboard
Avatar for Kevinho.art khoart
PRO
3
3.1k
Agile Actions for Facilitating Distributed Teams - ADO2019
Avatar for Mark Kilby mkilby
0
170
Believing is Seeing
Avatar for Spiro Bolos oripsolob
1
100

Transcript

  1. Reengineering Evolution, Devolution & Revolution Nat Pryce @natpryce | natpryce.com

    | [email protected]

  2. Quoting

  3. Grand vision APAC EMEA US

  4. Original architecture

  5. Attempted optimisation

  6. Parallelise calculations for APAC APAC EMEA

  7. Start refactoring, but don't finish APAC EMEA

  8. A new feature for EMEA APAC EMEA

  9. Reports for APAC APAC EMEA

  10. Diagnosing problems

  11. The system was modelled on a manual, paper-based process

  12. Idealised architecture

  13. Separate the projects

  14. "Cuckoo's Egg" application behind gateway

  15. HTTP data service "simplicators"

  16. "Pregression" tests

  17. Fake simplicators in system tests

  18. Introduce an acceptance test driven process

  19. Replace the GUI with a web application

  20. Continual indicative quoting is just a client

  21. Caching proxies for performance and scaling

  22. None

  23. Lines of Code Over Time