Spring for the Architecturally Curious Developer

Transcript

1. SPRING
   FOR
   ARCHITECTURALLY
   CURIOUS
   DEVELOPERS
   Oliver Drotbohm odrotbohm@vmware.com
   / odrotbohm
   

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3. Coming in 2023…
   Follow @mawspring on
   

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4. The Domain
   

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5. Orders
   Inventory
   Order
   Line items
   Stock
   Inventory items
   

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6. Unfortunately, Post-its
   don't run in production…
   

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7. Unfortunately, Post-its
   don't run in production…
   … except you work at Miro.
   

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10. Awesome! !
    Now… what? "
    

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11. Let's get started…
    src/main/java
    ….acme.myproject
    ….acme.myproject.domain
    ….acme.myproject.persistence
    ….acme.myproject.service
    ….acme.myproject.web
    

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13. Let's get started…
    src/main/java
    ….acme.myproject
    ….acme.myproject.domain
    ….acme.myproject.persistence
    ….acme.myproject.service
    ….acme.myproject.web
    #$
    

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14. via https://devopedia.org/cohesion-vs-coupling
    

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15. Domain
    Based
    Structure
    Domain
    Based
    Boundaries
    via Dan North – CUPID—for joyful coding
    Video cast episode @ Software Architektur im Stream (english)
    

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16. src/main/java
    ….acme.myproject
    ….acme.myproject.customer
    ….acme.myproject.inventory
    ….acme.myproject.order
    Much better…
    %!
    

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17. via https://devopedia.org/cohesion-vs-coupling
    

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18. Web
    Business logic
    Data access
    @Repository
    Order Inventory …
    @Controller
    @Service
    Verification? Testing? Documentation? Observation?
    

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20. Sample code
    https://github.com/odrotbohm/arch-evident-spring
    

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21. Demo time! &!
    

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22. Error Scenarios
    Transactional
    Event Listeners
    

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23. @EventListener
    @EventListener
    …
    @TransactionalEventListener
    @TransactionalEventListener
    …
    @Transactional Event
    Event
    Commit
    Consistency boundary
    Spring bean
    Legend
    

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24. Error scenarios
    

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25. What if a transactional
    event listener fails?
    "
    

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26. @EventListener
    @EventListener
    …
    @TransactionalEventListener
    @TransactionalEventListener
    …
    @Transactional Event
    Event
    Commit
    Consistency boundary
    Spring bean
    Legend
    Publication
    lost!
    )
    '(
    

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27. Event Publication
    Registry
    

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28. @TransactionalEventListener
    @TransactionalEventListener
    …
    Event
    @TransactionalEventListener
    …
    @TransactionalEventListener
    …
    Transaction Commit
    

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29. Demo time! &!
    

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30. Spring Modulith
    A convention to map modules to packages
    Simple set of access rules and API to verify
    Test support to bootstrap modules
    Documentation support
    Observability support
    

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31. Thank you!
    Questions?
    Oliver Drotbohm odrotbohm@vmware.com
    odrotbohm
    Sample Code
    

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