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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Architecture Katas: Improve your system architecture design skills in a fun way ! Alexandre Touret Worldline

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Alexandre Touret Architect / Developer #Java #API #CI #Cloud #Software_Craftsmanship https://blog.touret.info

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas A Developer Story

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas All architecture is design but not all design is architecture. Architecture represents the significant design decisions that shape a system, where significant is measured by cost of change. Grady Booch

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas So how are we supposed to get great architects, if they only get the chance to architect fewer than a half-dozen times in their career?" Ted Neward

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Architecture Katas Coding dojos for architects

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Stage #1 : Warm-up (5mn) • Build teams mixing different profiles • No computer needed! • Try to find suitable syntax and formalism

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas C4 Model

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas User My wonderful system Enables magic API Management Identifies/authorizes customers requests Calls API endpoint External System User Call / Usage System Internal System Chart legend: FILE GATEWAY Sends files Fetchs files regularly S3 STORAGE Stores files

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas External System User Call / Usage System Internal System Chart legend: User My API GATEWAY API Proxy Runtime:[Api Gateway] Mediation to back end OAUTHv2 Provider Runtime:[Api Gateway] Identifies and authorizes (1) API Call [JSON/HTTPS] My Wonderful System My App Runtime:[K8S,Docker,Spring Boot,JAVA11] (2) API Call [JSON/HTTPS] (3) Queries and stores datas [mongodb] Kubernetes MongoDB Replicaset Primary Secondary Arbiter

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Stage# 2: Design (1H) • All the teams get the subject • Teams can ask any questions • Teams can make any assumptions (if it’s relevant) • Teams can use any technology they want

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas An exemple: Poorest roads Public administration has been struggling identifying poorest roads to refurbish. With the help of new car connectivity features, they would like to get circulation traffic dynamic dashboards. These one could help them determining which road worths should be revamped. Key figure: 1 transaction per second per car

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Tips & Tricks • Clarify the functional requirements (Why setting a new application up ?) • Point out technical requirements and key figures • Zoom on your design step by step

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas ccepts files from truste customers person system e ternal person e ternal system

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas n ular ava prin oot person system e ternal person e ternal system Assumption: We on’t deal with Mobile phone dead zones

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Stage #3 : Peer Review (5mn/team) • You now have to present your design • … an e plain it to the other teams

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas How to evaluate a design?

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Three characteristics Simplicity Evolutivity Fits to the context

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas At Worldline • We started some initiatives setting up katas as a regular meeting (before the COVID19 crisis) • We started online sessions using Zoom • We contextualized and complexified step by step the subjects

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Benefits • Working in a new team on a new subject • Identifying and adapting to requirements • Communicating and persuading • Gaining insight • Understanding other ways of thinking • Getting better thanks to colleague's experience

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Going further

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas By dint of building well, you get to be a good architect Aristotle

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Thanks for your feedback!

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@worldlinexpert / @touret_alex #Devoxx #ArchitectureKatas Architecture Katas: Improve your system architecture design skills in a fun way ! Alexandre Touret Worldline Thanks !