Maintainable Architectures with Angular, Monorepos and Strategic Design @DigitalFestival 2019 in Nuremberg

Maintainable Architectures with Angular, Monorepos and Strategic Design @DigitalFestival 2019 in Nuremberg

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Manfred Steyer

July 16, 2019
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  1. 7.

    @ManfredSteyer Contents 1) Strategic DDD 2) Angular Monorepos 3) Nx

    Monorepos and DDD 4) DDD & Micro Frontends
  2. 8.

    @ManfredSteyer About me… • Manfred Steyer SOFTWAREarchitekt.at • Angular Trainings

    and Consultancy • Google Developer Expert (GDE) • Trusted Collaborator in the Angular Team Page ▪ 9 Manfred Steyer Public: Frankfurt, Vienna, Munich, Düsseldorf, Stuttgart In-House: everywhere http://softwarearchitekt.at/workshops
  3. 15.

    @ManfredSteyer Request Product Specify Order Approve Order Send Order Request

    Budget Approve Budget Budget Hierarchy Manager Manager Employee Expert Manager Buying Agent Product
  4. 25.

    @ManfredSteyer Creating a Workspace npm install -g @angular/cli ng new

    workspace cd workspace ng generate app my-app ng generate lib my-lib ng serve --project my-app ng build --project my-app
  5. 26.

    @ManfredSteyer Advantages Everyone uses the latest versions No version conflicts

    No burden with distributing libs Creating new libs: Adding folder Experience: Successfully used at Google, Facebook, …
  6. 31.

    @ManfredSteyer Catalog Ordering Shared Feature Feature Feature Feature Feature UI

    UI UI UI UI UI UI UI UI Domain Domain Domain Domain Domain Domain Util Util Util Util Util Util Enterprise Monorepo Patterns, Nrwl 2018: https://tinyurl.com/y2jjxld7 @ManfredSteyer Shared Kernel (if really needed) & other libs
  7. 32.

    @ManfredSteyer Catalog Ordering Shared Feature API Feature Feature Feature Feature

    UI UI UI UI UI UI UI UI UI Domain Domain Domain Domain Domain Domain Util Util Util Util Util Util @ManfredSteyer
  8. 33.

    @ManfredSteyer Catalog Ordering Shared Feature API Feature Feature Feature Feature

    UI UI UI UI UI UI UI UI UI Domain Domain Domain Domain Domain Domain Util Util Util Util Util Util @ManfredSteyer
  9. 34.

    @ManfredSteyer Application Domain Infrastructure Isolate your domain! Domain Domain Infrastructure

    e. g. data access Application Use case specific facades, state management Entities, biz logic
  10. 35.

    @ManfredSteyer Alternatives to layering • e. g. Hexagonal Architecture, Clean

    Architecture • Anyway: We need to restrict access b/w libraries
  11. 36.

    @ManfredSteyer Finegrained Libraries • Unit of recompilation • Unit of

    retesting • Access restrictions • Prevent Cycles • Information Hiding • Future replacement for NgModules?
  12. 39.

    @ManfredSteyer Catalog Ordering Shared Feature Feature Feature Feature Feature …

    … … … … … … … … @ManfredSteyer e-Procurement App Deployment Monolith
  13. 40.

    @ManfredSteyer Catalog Ordering Shared Feature Feature Feature Feature Feature …

    … … … … … … … … @ManfredSteyer Catalog App Ordering App Option 1: One App per Domain
  14. 41.

    @ManfredSteyer Catalog Ordering Shared Feature Feature Feature Feature Feature …

    … … … … … … … … @ManfredSteyer Catalog App Ordering App Option 2: One Monorepo per Domain Publish shared libs seperately via npm
  15. 44.

    @ManfredSteyer Summary Slicing into sub-domains Slicing into layers Relaxed layering

    Finegrained libraries Enforce restrictions Fits to micro frontends
  16. 46.

    @ManfredSteyer Contact and Downloads [mail] manfred.steyer@SOFTWAREarchitekt.at [web] SOFTWAREarchitekt.at [twitter] ManfredSteyer

    d Slides & Examples Public: Selected cities In-House: everywhere http://softwarearchitekt.at/workshops