A Journey into Strategic Domain Driven Design

One of the most relevant topics about Domain-driven Design is how to apply the strategic patterns to create organisational and technical designs aligned with the core domain of the company and maximize efficiency of the teams and infrastructure. The purpose of this talk is to show the journey of GetYourGuide in applying those strategic patterns to the travel industry in the marketplace business world.

Transcript

1. A Journey into Strategic Domain Driven Design Leandro Lages - @leandrolages
2. Agenda - Why DDD? - Context Mapping - Strategic Patterns - GetYourGuide Journey on DDD
3. Why Domain Driven Design ?
4. Challenges
5. Challenges
6. Problem and Solution Space - Ubiquitous Language - Domain Model - Domain and Subdomains - Bounded Contexts - Context Mapping
7. Problem and Solution Space Problem Space Ubiquitous Language Bounded Context B Bounded Context A1 Context Map Solution Space Domain Subdomain A Subdomain B Bounded Context A2
8. Patterns - Tactical Patterns - Entities - Value Objects - Repositories - Factories - Strategic Patterns - Focus on organization structure and technical aspects
9. Patterns - Tactical Patterns - Entities - Value Objects - Repositories - Factories - Strategic Patterns - Focus on organization structure and technical aspects
10. Context Mapping
11. A Reality Map
12. The Organization Reality
13. The Technical Reality
14. Strategic Patterns
15. Shared Kernel
16. Anticorruption Layer
17. Open Host Service Motivation
18. Open Host Service Solution
19. Customer - Supplier
20. Conformist - The upstream cannot collaborate with the Downstream context - Usually third-party/external suppliers but not limited to. - Usually used if the anti corruption layer is expensive to implement
21. Separate Ways - No relation at all - New model is built - Usually through manual steps or accessing other UIs - Start point on experimentation teams
22. Partnerships - Two teams work together to achieve a common context - There is no upstream / downstream relation between them - It’s created to use/maintain a shared kernel
23. Communicating the Context Map
24. The GetYourGuide Journey
25. 25 We’re the world’s largest marketplace for travel activities v Connecting travelers… …to suppliers around the world
26. Availability Context Search Context Initial Scenario: Monolith App Tour Availability Model Tour Model U D Monolith App
27. Availability Context Search Context Initial Scenario: Monolith App Tour Availability Model Tour Model U D Monolith App Conformist
28. Current Scenario: Tour Model Aggregate Context: German User - ID: 10 - Name: Munich Walking Tour - Languages: - English - date: 2018-10-17 - qty: 0 - German - date: 2018-10-17 - qty: 0 - Spanish - date: 2018-10-17 - qty: 7
29. Current Scenario: Tour Model Aggregate Context: German User - ID: 10 - Name: Munich Walking Tour - Languages: - English - date: 2018-10-17 - qty: 0 - German - date: 2018-10-17 - qty: 0 - Spanish - date: 2018-10-17 - qty: 7
30. Our journey over the next 18 months From monolith to right-sized services
31. Scaling up the company
32. Fulfillment Improve customer experience at the day of conduction, including the GetYourGuide app. Discovery Search & recommendations Travelers (apps) Consumer apps. This team is also likely to work on fulfillment in the coming quarter. Supply Tools & Catalog Supplier portal and tools catalog Travelers (web) Consumer website Supply Platform & Connectivity Partner integrations and core supply services Supply Travelers FinTech Payments & financial systems Marketplace Analysts Shared Analytics Marketplace Operations
33. Availability Context Search Context Target Scenario: Search as a Service Tour Availability Model Tour Model U D Monolith App ACL
34. Current Scenario: Tour Model Aggregate Context: German User - ID: 10 - Name: Munich Walking Tour - Languages: - English - German - Available at: - 2018-10-17 - 2018-10-18
35. The strategic importance of Context Maps - Retaining Integrity - The Basis for a Plan of Attack - Understanding Ownership and Responsibility - Revealing Areas of Confusion in Business Work Flow - Identifying Nontechnical Obstacles - Encourages Good Communication - Helps On‐Board New Starters
36. DDD is not only engineers!
37. - Infoq on DDD Context Map - Webinar - Strategic Design References
38. Help us on the Journey http://careers.getyourguide.com http://inside.getyourguide.com @getyourguide @leandrolages Thank you!