7 Years of Domain-Driven Design (DDD Foundations)

Transcript

1. vladikk doit-intl.com #DDDEU 7 YEARS OF DDD or Tackling Complexity in Large Scale Marketing Systems
2. vladikk doit-intl.com #DDDEU YAY!!!
3. vladikk doit-intl.com #DDDEU
4. vladikk doit-intl.com #DDDEU Your Product Marketing Strategy Creatives Campaigns Sales Agents Optimization Profits
5. vladikk doit-intl.com #DDDEU THE FIRST BOUNDED CONTEXT 01
6. vladikk doit-intl.com #DDDEU
7. vladikk doit-intl.com #DDDEU
8. Very nice!!!1
9. vladikk doit-intl.com #DDDEU Aggregates everywhere!!!
10. vladikk doit-intl.com #DDDEU Aggregates everywhere!!! Creative Agency Advertiser Publisher Website Placement Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Campaign
11. vladikk doit-intl.com #DDDEU The Bounded Context Creative Agency Advertiser Publisher Website Placement Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Audience
12. vladikk doit-intl.com #DDDEU Domain Model Service / Application Layer Presentation Infrastructure Anemic! Behaviour
13. vladikk doit-intl.com #DDDEU Imperfect architecture “QA is for cowards” BUT IT WORKED!
14. vladikk doit-intl.com #DDDEU UBIQUITOUS LANGUAGE
15. vladikk doit-intl.com #DDDEU Domain Experts Software Developers No experience in online marketing Nice people!
16. vladikk doit-intl.com #DDDEU Smooth communication Strong grasp of the business domain Working software Aggressive time to market
17. vladikk doit-intl.com #DDDEU Ubiquitous Language Anemic Domain Model
18. vladikk doit-intl.com #DDDEU Leads Sales Agents Ads
19. vladikk doit-intl.com #DDDEU Leads CRM Categorize Desk Desk Desk Sales Agents Sales Agents Sales Agents Clients’ Systems
20. vladikk doit-intl.com #DDDEU
21. vladikk doit-intl.com #DDDEU THE CRM BOUNDED CONTEXT 02
22. vladikk doit-intl.com #DDDEU Ubiquitous Language Anemic Domain Model
23. vladikk doit-intl.com #DDDEU Creative Agency Publisher Website Advertiser Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Audience Group Desk Qualification Assessment Organization Unit Assignment Rank Message On-site Activity Placement Visit Brand Marketing Lead CRM Lead Marketing Campaign CRM Campaign
24. vladikk doit-intl.com #DDDEU Domain Experts Software Developers …. Lead …. …. Campaign…
25. vladikk doit-intl.com #DDDEU
26. vladikk doit-intl.com #DDDEU
27. vladikk doit-intl.com #DDDEU BOUNDED CONTEXTS PROTECT THE LANGUAGE AGGREGATES PROTECT CONSISTENCY OF DATA
28. vladikk doit-intl.com #DDDEU Creative Agency Publisher Website Advertiser Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Audience Group Desk Qualification Assessment Organization Unit Assignment Rank Message On-site Activity Placement Visit Brand Marketing Lead CRM Lead Marketing Campaign CRM Campaign
29. vladikk doit-intl.com #DDDEU Creative Agency Publisher Website Advertiser Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Audience Placement Visit Lead Campaign Marketing Group Desk Qualification Assessment Organization Unit Assignment Rank Message On-site Activity Brand Lead Campaign CRM
30. vladikk doit-intl.com #DDDEU Aggregates will: • Protect transactional boundaries
 • Encompass business logic and invariants Domain Service / Application Layer Presentation Infrastructure
31. vladikk doit-intl.com #DDDEU Aggregates will: • Protect transactional boundaries
 • Encompass business logic and invariants Domain Service / Application Layer Presentation Infrastructure Domain Service / Application Layer
32. vladikk doit-intl.com #DDDEU
33. vladikk doit-intl.com #DDDEU
34. vladikk doit-intl.com #DDDEU
35. vladikk doit-intl.com #DDDEU Stored procedures???
36. vladikk doit-intl.com #DDDEU Group Desk Qualification Assessment Organization Unit Assignment Rank Message On-site Activity Brand Lead Campaign Lead
37. vladikk doit-intl.com #DDDEU L e a d CRM Team DBA Team
38. vladikk doit-intl.com #DDDEU
39. vladikk doit-intl.com #DDDEU Inconsistent models No shared understanding Duplication of knowledge Went out of sync quickly NIGHTMARE
40. vladikk doit-intl.com #DDDEU Wasn’t delivered on time
41. vladikk doit-intl.com #DDDEU Wasn’t delivered on time Production issues
42. vladikk doit-intl.com #DDDEU Wasn’t delivered on time Production issues Data corruption
43. vladikk doit-intl.com #DDDEU Wasn’t delivered on time Production issues Data corruption Thrown away and reimplemented
44. vladikk doit-intl.com #DDDEU Ubiquitous Language Domain Model Bounded Contexts Protect w/ Implement as
45. vladikk doit-intl.com #DDDEU Ubiquitous Language Domain Model Bounded Contexts Protect w/ Implement as …Dude, where are Sub-Domains?
46. Not all of a large system will be well designed “ Eric Evans
47. vladikk doit-intl.com #DDDEU THE CRUNCHERS BOUNDED CONTEXT 03
48. vladikk doit-intl.com #DDDEU Marketing CRM Analysis Customer Events Marketing CRM
49. vladikk doit-intl.com #DDDEU Marketing CRM Analysis Customer Events Event Crunchers
50. vladikk doit-intl.com #DDDEU Competitive advantage? - No Off-the-shelve solution? - No => Supporting sub-domain
51. vladikk doit-intl.com #DDDEU Layered Architecture Transaction Script Worked …. for a while
52. vladikk doit-intl.com #DDDEU Customer Events Event Crunchers Marketing CRM Analysis Flag Flag Calculated fields
53. vladikk doit-intl.com #DDDEU Marketing CRM Analysis Customer Events Event Crunchers
54. vladikk doit-intl.com #DDDEU Customer Events Event Crunchers (BBOM) CRM Marketing Analysis
55. vladikk doit-intl.com #DDDEU Customer Events Event Crunchers (Event Sourced) CRM Marketing Analysis
56. vladikk doit-intl.com #DDDEU THE BONUSES BOUNDED CONTEXT 04
57. vladikk doit-intl.com #DDDEU Sales Commissions Reports
58. vladikk doit-intl.com #DDDEU Competitive advantage? - No Off-the-shelve solution? - No => Supporting sub-domain
59. vladikk doit-intl.com #DDDEU Active Record Service / Application Layer Presentation Infrastructure
60. vladikk doit-intl.com #DDDEU Sales Commissions Reports Let’s try different percentages What if the percentage could be a function of a price? No, what if the percentage is a function of number of sales? No, no, the percentage will be a function both of number of sales and sale amount And another upgrade if there are more than Y sales per week! But we will upgrade the percentage if there are more than X sales per month!
61. vladikk doit-intl.com #DDDEU Event Sourced Domain Model Service / Application Layer Presentation Infrastructure BIG BALL OF MUD
62. vladikk doit-intl.com #DDDEU Active Record Service / Application Layer Presentation Infrastructure Transaction Script Service / Application Layer Presentation Infrastructure Event Crunchers Bonuses Ubiquitous Language
63. vladikk doit-intl.com #DDDEU Event Sourced Domain Model Service / Application Layer Presentation Infrastructure Event Sourced Domain Model Service / Application Layer Presentation Infrastructure Event Crunchers Bonuses Ubiquitous Language
64. vladikk doit-intl.com #DDDEU Ubiquitous Language Core Bounded Contexts Protect by
 decomposing to Identify Domains Domain Model Supporting Generic AR / TS Adopt Implement as
65. vladikk doit-intl.com #DDDEU WHAT WE HAVE L E A R N E D
66. vladikk doit-intl.com #DDDEU UBIQUITOUS LANGUAGE 01
67. vladikk doit-intl.com #DDDEU UBIQUITOUS LANGUAGE THE CORE DOMAIN OF DOMAIN-DRIVEN DESIGN
68. vladikk doit-intl.com #DDDEU Marketing Ubiquitous Language Business goals achieved CRM Ubiquitous Language Production issues Long and painful refactoring Event Crunchers Ubiquitous Language Big ball of mud Bonuses Ubiquitous Language Refactored in time
69. vladikk doit-intl.com #DDDEU DOMAIN TYPES 02
70. vladikk doit-intl.com #DDDEU Core Supporting Generic
71. vladikk doit-intl.com #DDDEU Generic Domain Adopt / Buy Supporting Domain Active Record / Transaction Script Core Domain Domain Model / Event Sourcing
72. vladikk doit-intl.com #DDDEU COMPANIES CHANGE, EVOLVE, REINVENT THEMSELVES DOMAINS' TYPES CHANGE ACCORDINGLY
73. vladikk doit-intl.com #DDDEU SUPPORTING ➤ CORE • Event Crunchers • Bonuses
74. vladikk doit-intl.com #DDDEU Generic Domain Adopt / Buy Supporting Domain Active Record / Transaction Script Core Domain Domain Model / Event Sourcing
75. vladikk doit-intl.com #DDDEU Generic Domain Adopt / Buy Supporting Domain Active Record / Transaction Script Core Domain Domain Model / Event Sourcing
76. vladikk doit-intl.com #DDDEU Less waste Dialog with the business IMPLEMENTATION DESIGN ➤ DOMAIN TYPE
77. vladikk doit-intl.com #DDDEU • Questionable competitive edge? • Unexpected competitive edge? BUSINESS COMPLEXITY ≠ DOMAIN TYPE?
78. vladikk doit-intl.com #DDDEU SUMMARY
79. vladikk doit-intl.com #DDDEU Creative Agency Advertiser Publisher Website Placement Ad Zone Ad Type Target Market Group Zone Type Funnel Contract Budget Unit Campaign Aggregates everywhere!!!
80. vladikk doit-intl.com #DDDEU Ubiquitous Language Bounded Contexts Protect by
 decomposing to Design
 Implementation Core Supporting Generic Domain Model AR / TS Adopt Confirm w/
 Business Ubiquitous Language Everywhere!!!
81. https://bit.ly/2ptJ5fS THANK YOU! @vladikk vladikk.com https://bit.ly/31nSD9c http://careers.doit-intl.com