let me be free workshop slides

Transcript

1. Let Me Be Free workshop 1 @SepNamdar @KhaledSouf
2. Who we are? SEPEHR NAMDAR @SepNamdar @DDD_Iran @SHODOioFR 2
3. Who is this guy? KHALED SOUF https://ksouf.com @khaledsouf 3 @SoCraTes_CA @ScRomandie
4. Let’s clear some concepts A Bounded Context (BC) : 4 @SepNamdar @KhaledSouf An Autonomous System Clients Other BCs Data Source
5. Let’s clear some concepts Context Mapping : 5 @SepNamdar @KhaledSouf BC 1 BC 2 Context mapping Strategy
6. Let’s Start the Workshop 6
7. First of all : Learn the Domain As a Human Resource I want to find an available Recruiter According to my Candidate Availabilities “Who can test”* my Candidate. Who can test : The Recruiter should cover all Candidate’s Skills. 7 @SepNamdar @KhaledSouf
8. Context 8 Shared Objects BC LMBF BC Another BC Another BC BC : Bounded Context @SepNamdar @KhaledSouf
9. Shared Kernel 9 Shared Objects BC LMBF BC Another BC Another BC BC : Bounded Context @SepNamdar @KhaledSouf
10. Shared Kernel 10 @SepNamdar @KhaledSouf • Should be avoid as much as possible • Need a high level communication between teams who use it • Teams need to be mature and awareness • Needs solid integration tests • One team should be it’s responsible • Most of time are the Legacy / BBOM systems
11. Customer / Supplier 11 Shared Objects BC LMBF BC Another BC Another BC BC : Bounded Context @SepNamdar @KhaledSouf Customer (Downstream) Supplier (Upstream) Customer (Downstream) Customer (Downstream) Depends on D U
12. Step 0 : Let’s have a look 12
13. Step 0 : What do you expect ? 13
14. Anti-Corruption Layer (ACL) 14 Shared Objects BC LMBF BC Another BC Another BC BC : Bounded Context @SepNamdar @KhaledSouf ACL D U
15. Anti-Corruption Layer (ACL) 15 @SepNamdar @KhaledSouf • Avoid a BC to be corrupted by other BCs • Always at Downstream side • Filter Data • Useful in case of working with : ◦ a Legacy System (Bubble Context) ◦ a big quantity of data (ACL Back-end Repository)
16. Step 1 : Free up LMBF 16 @SepNamdar @KhaledSouf
17. Step 1 : Let’s Code 17
18. Step 2 : Respect the UL of your Domain 18 @SepNamdar @KhaledSouf • An ACL has also the responsibility to translate data
19. Step 2 : Let’s Code 19
20. Step 3 : Other BCs implement same services as you 20 @SepNamdar @KhaledSouf
21. Open Host Service (OHS) 21 Shared Objects BC LMBF BC Another BC Another BC BC : Bounded Context @SepNamdar @KhaledSouf ACL D U SHO
22. Open Host Service (OHS) 22 @SepNamdar @KhaledSouf • Always used on Upstream side • Adapt exposed services in order to coordinate with Downstream BCs • Useful when many Downstream BCs depend on un Upstream BC • Use a Shared Language to satisfy all Downstream BCs
23. Step 3 : Let’s Code 23
24. Step 4 : What to do with Room Service 24 @SepNamdar @KhaledSouf Shared Objects BC LMBF BC Another BC Another BC ACL D U OHS Room Booking BC
25. Conformist 25 @SepNamdar @KhaledSouf Unreachable BC LMBF BC Conformist D U
26. Conformist 26 @SepNamdar @KhaledSouf • Always used on Downstream side • Like an ACL • Downstream BC does not have the chance to negotiate with Upstream BC • Downstream BC should accept the Upstream constructions
27. Separate Ways 27 @SepNamdar @KhaledSouf Another BC LMBF BC
28. Separate Ways 28 @SepNamdar @KhaledSouf • The cost of communication and integration between BCs is too high ◦ Two teams that can not support each other ◦ Two teams with an important time difference • We accept to have duplications
29. Step 4 : Let’s Discuss 29 • Given hypothesis, suggest one or more integration solutions for communicate between LMBF BC and Room Reservation BC
30. Final Word 30 @SepNamdar @KhaledSouf Domain evolves, so Context Mapping Strategies can change ‘if the architecture of the organization is at odds with the architecture of the system, the architecture of the organization wins’ Ruth Malan - Architect
31. 31 @SepNamdar @KhaledSouf Any question?
32. - https://github.com/ddd-crew/context-mapping - https://www.domainlanguage.com/ddd/surrounded-by-legacy-software/ 32 Resources @SepNamdar @KhaledSouf
33. 33 نوﻧﻣﻣ @SepNamdar @KhaledSouf