Patterns Of Architectural Modernization

@duﬄeit Patterns Of Architectural Modernization Beyond Strangler Fig

@duﬄeit DAVID LEITNER Coding Architect 👋 [email protected] 🌎 @duﬄeit

@duﬄeit Where is all this legacy coming from?

@duﬄeit 🖼 🏢 👾 🚀 🗺 🧑💻 💭 👩🦰 👦
🧑 💭 🌱

@duﬄeit 🖼 🏢 👾 🚀 🗺 🌱 🧑💻 💭 👩🦰
👦 🧑 💭

@duﬄeit

@duﬄeit Software

@duﬄeit Software 🖼

@duﬄeit 🖼 🏢 👾 👩🦰 👦 🧑 Software

@duﬄeit Everything constantly changes in unpredictable ways; that's the main
constant in software. — Neal Ford

@duﬄeit Software 🖼 🏢 👾 👩🦰 👦 🧑 GAP ✨

@duﬄeit 1996: Technical Debt too high in Version 4 Complete
Rewrite 2000: Netscape Version 6 Released The story of Netscape

@duﬄeit If you do a big bang migration, the only
thing you're certain of is a big bang. — Martin Fowler

@duﬄeit GAP ✨ Software

@duﬄeit Software

@duﬄeit Constant architectural evolution and modernization are key to keeping
engineering organizations eﬀective in delivering value. As our constraints and the environment, we operate in are constantly changing.

@duﬄeit Even if you make consistently good architecture decisions, the
assumptions your decisions are based on will change over time. — Nick Tune

@duﬄeit Software

@duﬄeit Current State Target State Shift of Business Shift of
Technology Reduction of Costs Organizational Change Shift Of Pace

@duﬄeit Deﬁne what your are optimizing for Shift of Business
Shift of Technology Reduction of Costs Organizational Change Shift Of Pace and how you can measure it.

@duﬄeit Deﬁne what your are optimizing for Shift of Business
Shift of Technology Reduction of Costs Organizational Change Shift Of Pace and how you can measure it. on Fitness Functions

@duﬄeit Current State Target State Shift of Business Shift of
Technology Reduction of Costs Organizational Change Shift Of Pace Why? Target Picture Measure In Iterations

@duﬄeit Divide And Conquer Finding Boundaries

@duﬄeit Business Capability Map

@duﬄeit Improve the Modularisation Maintainability Adaptability Products Categories Users Orders

@duﬄeit Decrease the Cycle Time Products Categories Users Orders

@duﬄeit Decrease the Cycle Time 👩🦰 👧 👱 Products Categories
Users Orders

@duﬄeit Decrease the Cycle Time 👩🦰 👧 👱 🧑 👧
👧 👧 🧑 🧑 👧 🧑 🧑 Products Categories Users Orders Distribtued Monolith

@duﬄeit Product Search Product ORDERing Prodcut Delivery Modularize Around Customer
Journeys

@duﬄeit Event Storming Event Storming

@duﬄeit Product Search Product ORDERing Prodcut Delivery Modularize Around Customer
Journeys Pivotal Events

@duﬄeit Product Search Prodcut Delivery Structure Around Customer Journeys Service
👧 🧑 🧑 🧑 👧 👧 👩🦰 👧 👱 Service Product ORDERing Service

@duﬄeit Organizations which design are constrained to produce designs which
are copies of the communication structures of these organizations. — Melvin Conway

@duﬄeit Product Search Team 👧 🧑 🧑 Inverse Conway Maneuver

@duﬄeit Nick Tune the-engineering.club

@duﬄeit 👧 🧑 🧑

@duﬄeit ALL MONOLITHS MUST DIE

@duﬄeit Good & Bad Bank Strategy New web Banking Solution
✨ 20% of the functionality That is Used by 80% of the users Legacy web Banking Solution 🧟 80% of the functionality That is Used by 20% of the users

@duﬄeit Product Search Prodcut Delivery Service 👧 🧑 🧑 🧑
👧 👧 👩🦰 👧 👱 Product ORDERing Independent Deployability Higher Resilience Dynamic Scaling Decrease Failure Rate

@duﬄeit Deployment Units Monolithic Distributed Modularisa3on Bad Well Big Ball
Of Mud

Of Mud Distributed MOnolith WelL-Structured MOdulith

Of Mud WelL-Structured Modulith Distributed Monolith Distributed Self-Sufficient Services Independent Deployability achieved higher Resilience

Of Mud WelL-Structured Modulith Distributed Monolith Distributed Self-Sufficient Services Decomposition Fallacy

👧 👧 👩🦰 👧 👱 Product ORDERing Independent Deployability Higher Resilience Dynamic Scaling

@duﬄeit Strangler Fig Pattern

@duﬄeit Strangler Fig Application. — Martin Fowler’s Bliki https://martinfowler.com/bliki/ StranglerFigApplication.html

👧 👧 👩🦰 👧 👱 Product ORDERing Independent Deployability Higher Resilience Dynamic Scaling API Reverse Proxy

@duﬄeit 👧 🧑 🧑 Payment Serivce 👩🦰 👧 FrauD Logic

@duﬄeit User Fraud Data Readers Writers Readers Writers API FrauD
Service 👧 🧑 🧑 👩🦰 👧 Payment Serivce

@duﬄeit Payment Serivce FrauD Service User Fraud Data Readers Writers
Readers Writers API 👧 🧑 🧑

@duﬄeit Payment Serivce FrauD Service User Fraud Data Readers Writers
Readers Writers API 👧 🧑 🧑 Downtime ⏳

@duﬄeit Payment Serivce User Fraud Data Readers Writers Readers Writers
API Downtime ⏳

@duﬄeit Readers Writers Readers Writers API User Fraud Data 🔥
Payment Serivce

@duﬄeit User Fraud Data Readers Writers API 🔥 Readers Writers
Payment Serivce

@duﬄeit User Fraud Data Readers Writers API Readers Writers Payment
Serivce Event Inception Pattern 🌊

@duﬄeit Event User Fraud Data Readers Writers Readers Writers API
User Fraud Data CDC Payment Serivce Event Inception Pattern 🌊

@duﬄeit squer.link/cdc

User Fraud Data CDC Payment Serivce Event Inception Pattern 🌊

@duﬄeit Event User Fraud Data Readers Readers Writers API User
Fraud Data Event Writers Payment Serivce Event Inception Pattern 🌊

User Fraud Data Event Payment Serivce Transitional Architecture 👷

Fraud Data API Payment Serivce Legacy Mimic Pattern 🤡 Writers

User Fraud Data Event 🔥 Payment Serivce Event Inception Pattern 🌊

Fraud Data Event Writers 👷 Payment Serivce

User Fraud Data Event Payment Serivce

@duﬄeit Event User Fraud Data Readers Writers API User Fraud
Data Event Readers Writers Payment Serivce Transitional Architecture 👷

Data Event Readers Writers Payment Serivce Transitional Architecture 👷 Feature Flags 🚦

@duﬄeit Transitional Architecture 👷 Legacy Readmodel 📒

Data Event Readers Writers Payment Serivce 90% 10% Canary Releases 🦜

Data Event Readers Writers Payment Serivce 100% Canary Releases 🦜

Data Event Readers Writers Payment Serivce 100% 0% Dark Launching 🥷

Data Event Readers Writers Payment Serivce Scientist Pattern 👨🔬

@duﬄeit Scientist: Measure Twice, Cut Once — Github https://github.blog/2016-02-03-scientist/

@duﬄeit

Data Event Readers Writers Payment Serivce New Frau Product Old Frau Product Dual Transformation 🪢

@duﬄeit Transformation A: Improve the current solution Transformation B: Rebuild
a new solution from scratch

Data Event Readers Writers Payment Serivce

Data Event Readers Writers Incrementally Incrementally Incrementally

@duﬄeit So many thing to consider, Let’s sum up.

@duﬄeit Architecture modernization is like open-heart surgery on your legacy
system. Ensure your systems stays alive.

@duﬄeit Architecture modernization is like open-heart surgery on your legacy
system. Ensure it stays alive by incremental adoptions. Clarify what to optimize for Streamline your target picture Incrementally move to this target picture Fine a way to Measure it As Long as it brings Value

@duﬄeit Transitional Architecture 👷 Event Inception Pattern 🌊 Legacy Mimic
Pattern 🤡 Feature Flags 🚦 Canary Releases 🦜 Dark Launching 🥷 Scientist Pattern 👨🔬 Dual Transformation 🪢

@duﬄeit DAVID LEITNER Coding Architect 👋 [email protected] 🌎 @duﬄeit

Patterns Of Architectural Modernization

Patterns Of Architectural Modernization

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