1. ARCH-2: OpenEdge Reference Architecture (OERA) Latest Thinking
Mike Ormerod
Product Manager & Applied Architect

2. Agenda
New Colo(u)rs!
Misconceptions
ARCH-2: OERA Latest Thinking

3. OpenEdge® Reference Architecture circa 2003
PROGRESS
Users
Presentation Layer/s
Business Servicing Layers
Data Access Layers
Managed
Data Stores
Unmanaged
Enterprise
Services
Integration Layer/s
ARCH-2: OERA Latest Thinking

4. OpenEdge® Reference Architecture 2007
Presentation
Enterprise Services
Business Components
Common Infrastructure
Data Access
Data Sources
ARCH-2: OERA Latest Thinking

5. Agenda
New Colo(u)rs!
Misconceptions
ARCH-2: OERA Latest Thinking

6. OERA is just “slide-ware”
OERA Misconception #1
OERA is just “slide-ware”
>115 Material postings in
OpenEdge Principles on PSDN
ARCH-2: OERA Latest Thinking

7. OERA is a prescribed code base
OERA Misconception #2
OERA is a prescribed code base
OERA isn’t code! OERA is a set
of guidelines & definitions
ARCH-2: OERA Latest Thinking

8. There is only 1 implementation
OERA Misconception #3
There is only 1 implementation
Already 3 variants of Implementations
posted on PSDN
ARCH-2: OERA Latest Thinking

9. It’s way too complex and scary!
OERA Misconception #4
It’s way too complex and scary!
Application Architecture Series on
PSDN
ARCH-2: OERA Latest Thinking

10. It’s an all or nothing approach
OERA Misconception #4
It’s an all or nothing approach
Application Transformation
Approach
ARCH-2: OERA Latest Thinking

11. I have to use ProDataSets
OERA Misconception #5
I have to use ProDataSets
ProDataSets have advantages
but not mandatory
ARCH-2: OERA Latest Thinking

12. OERA is an enabler for SOA, not
OERA Misconception #6
OERA is only for SOA
OERA is an enabler for SOA, not
only for SOA
ARCH-2: OERA Latest Thinking

13. Thank you for your time
ARCH-2: OERA Latest Thinking

14. Agenda New Colo(u)rs! Misconceptions New Component Model
ARCH-2: OERA Latest Thinking

15. OpenEdge® Reference Architecture 2007
Presentation
Business Components
Data Access
Data Sources
Common Infrastructure
Enterprise Services
ARCH-2: OERA Latest Thinking

16. OERA Component Model
ARCH-2: OERA Latest Thinking

17. Thank you for your time
ARCH-2: OERA Latest Thinking

18. Agenda New Colo(u)rs! Misconceptions New Component Model
The Devil is in the Detail
ARCH-2: OERA Latest Thinking

19. OpenEdge® Reference Architecture 2007
OpenEdge® Architecture circa 1800
Application
Common Infrastructure
Enterprise Services
Presentation
Business Components
Data Access
Data Sources
ARCH-2: OERA Latest Thinking

20. The Break Up! Can we Talk!! Client Application Server
ARCH-2: OERA Latest Thinking

21. Service Adapter Is Accessed by Has Access to Client Business Component
Common Infrastructure
Has Access to
Service Interface of the Service Provider
ARCH-2: OERA Latest Thinking

22. Service Adapter Role & Responsibilities
Manages Access to Service Provider
Includes Discovery
Isolates client from specific terms of Service Contract
ARCH-2: OERA Latest Thinking

23. Service Interface Is Accessed by Has Access to
Service Adapter (Service Requester)
Has Access to
Business Components
Common Infrastructure
ARCH-2: OERA Latest Thinking

24. Service Interface Role & Responsibilities Exposes Methods of Business
Components
Manages Data Transformation
Includes Discovery
ARCH-2: OERA Latest Thinking

25. OERA Component Model
Client
Server
ARCH-2: OERA Latest Thinking

26. OERA Component Model
Client
Server
ARCH-2: OERA Latest Thinking

27. Business Components Server Service Interface Business Entity
Business Task
Business Workflow
Business Components
Data Access
ARCH-2: OERA Latest Thinking

28. Business Components Service Interface Service Interface
Business Entity
Business Task
Business Workflow
ARCH-2: OERA Latest Thinking

29. Business Workflow Is Accessed by Has Access to Service Interface
1:M Business Workflow
1:M Business Tasks
1:M Business Entities
ARCH-2: OERA Latest Thinking

30. Business Workflow Role & Responsibilities Manages Multi-Step Process
Manages State, NOT Transaction
Exposes Methods to Service Interface
ARCH-2: OERA Latest Thinking

31. Business Task Is Accessed by Has Access to Service Interface
Business Workflow
Business Task
Has Access to
1:M Business Entities
Common Infrastructure
ARCH-2: OERA Latest Thinking

32. Business Task Role & Responsibilities process/transaction
Manages process > 1 Business Entity
Must complete in a single
process/transaction
Manages Transactions
Exposes Methods to Service Interface
ARCH-2: OERA Latest Thinking

33. Business Entity Is Accessed by Has Access to Service Interface
Business Workflow
Business Task
Has Access to
Data Access Object
Common Infrastructure
ARCH-2: OERA Latest Thinking

34. Business Entity Role & Responsibilities Encapsulates Business Logic
No knowledge of Physical DataSource
Exposes Methods to Service Interface
Manages Transaction
ARCH-2: OERA Latest Thinking

35. Business Components OERA Component Model Client Server
ARCH-2: OERA Latest Thinking

36. OERA Component Model
Client
Server
Server
ARCH-2: OERA Latest Thinking

37. Data Access Components
Server
Business Components
Data Access
Data Access Object
Data Source Object
ARCH-2: OERA Latest Thinking

38. Data Access Object Is Accessed by Has Access to Business Entity
1:M Data Source Objects
Common Infrastructure
ARCH-2: OERA Latest Thinking

39. Data Access Object Role & Responsibilities
Aggregates & Manages 1:M Data Source
Objects
Manages data flow between Business
Component Layer & Data Source Layer
Encapsulates logic to complete a Data Instance
No Knowledge of Physical Data Source
ARCH-2: OERA Latest Thinking

40. Data Source Object Is Accessed by Has Access to
1:M Data Access Objects
Has Access to
Data Source
Common Infrastructure
ARCH-2: OERA Latest Thinking

41. Data Source Object Role & Responsibilities Access to Data Source
Knowledge of Physical Data Source
Structure
Maps Data Instance to Data Source
Encapsulates logic that requires knowledge of physical Data Source
Optimistic Concurrency Control
Manages Data Source Connection (if required)
Handles Compensating Transactions
ARCH-2: OERA Latest Thinking

42. Data Access Components
OERA Component Model
Data Access Components
Client
ARCH-2: OERA Latest Thinking

43. OERA Component Model
Client
Client
ARCH-2: OERA Latest Thinking

44. Client Business Component
Presentation Layer
Client
Presenter
Client Business Component
View
Service Adapter
ARCH-2: OERA Latest Thinking

45. Client Business Component (Model)
Is Accessed by
Client Presenter
Has Access to
Service Adapter
Client Common Infrastructure
ARCH-2: OERA Latest Thinking

46. Client Business Component (Model)
Role & Responsibilities
Client representation of Service
Provider Business Component
Encapsulates client-side business logic
Manages Data Instance
ARCH-2: OERA Latest Thinking

47. Client Presenter Is Accessed by Has Access to Client View
Client Business Component
Client Common Infrastructure
ARCH-2: OERA Latest Thinking

48. Client Presenter Role & Responsibilities
Handles events for Presentation
Coordinates presentation components
ARCH-2: OERA Latest Thinking

49. Client View Is Accessed by Has Access to Client Presenter User!
Client Common Infrastructure
ARCH-2: OERA Latest Thinking

50. Client View Role & Responsibilities Contains visual components
Displays data provided by Client
Business Component
ARCH-2: OERA Latest Thinking

51. OERA Component Model
ARCH-2: OERA Latest Thinking

52. OERA Component Model
ARCH-2: OERA Latest Thinking

53. Enterprise Services Service Provider acting as a Service Requester
Service Adapter
Accessed by Business Components (outbound)
Accesses Service Provider Service Interface (inbound)
ARCH-2: OERA Latest Thinking

54. Common Infrastructure
OERA Component Model
Presentation
Business Components
Data Access
Data Sources
Common Infrastructure
Enterprise Services
ARCH-2: OERA Latest Thinking

55. For More Information, go to…
PSDN
OpenEdge Principles
OpenEdge Principles Forum
ARCH-2: OERA Latest Thinking

56. Relevant Exchange Sessions
ARCH-1: Application Architecture Made Simple
ARCH-7: A Class based implementation of the OERA
ARCH-11: Building your presentation with classes
ARCH-13: Transactions in an SOA World
ARCH-14: Power Your Organization with OpenEdge
DEV-5: Using ProDataSets in OpenEdge 10
DEV-6: Getting started with OO Programming
ARCH-2: OERA Latest Thinking

57. Questions?
ARCH-2: OERA Latest Thinking

58. Thank you for your time
ARCH-2: OERA Latest Thinking

59. ARCH-2: OERA Latest Thinking