OpenEdge Reference Architecture OERA Latest Thinking

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OpenEdge Reference Architecture (OERA) Latest
Thinking
Frank Beusenberg
Applied Technology Consultant
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Agenda

• New Colo(u)rs!
• Misconceptions

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OpenEdge Reference Architecture circa 2003
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OpenEdge Reference Architecture 2007
Presentation
Enterprise Services
Business Components
Common Infrastructure
Data Sources
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Agenda

• New Colo(u)rs!
• Misconceptions

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OERA Misconception 1
OERA is just slide-ware
gt115 Material postings in OpenEdge Principles on
PSDN
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OERA Misconception 2
OERA is a prescribed code base
OERA isnt code! OERA is a set of guidelines
definitions
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OERA Misconception 3
There is only 1 implementation
Already 3 variants of Implementations posted on
PSDN
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OERA Misconception 4
Its way too complex and scary!
Application Architecture Series on PSDN
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OERA Misconception 4
Its an all or nothing approach
Application Transformation Approach
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OERA Misconception 5
I have to use ProDataSets
ProDataSets have advantages but not mandatory
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OERA Misconception 6
OERA is only for SOA
OERA is an enabler for SOA, not only for SOA
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Thank you foryour time
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Agenda

• New Colo(u)rs!
• Misconceptions
• New Component Model

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OpenEdge Reference Architecture 2007
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OERA Component Model
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Thank you foryour time
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Agenda

• New Colo(u)rs!
• Misconceptions
• New Component Model
• The Devil is in the Detail

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OpenEdge Reference Architecture 2007
OpenEdge Architecture circa 1800
Application
Presentation
Business Components
Data Access
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The Break Up!
Can we Talk!!
Client
Application
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Service Adapter

• Is Accessed by
• Client Business Component
• Common Infrastructure
• Has Access to
• Service Interface of the Service Provider
• Common Infrastructure

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Service Adapter

• Role Responsibilities
• Manages Access to Service Provider
• Includes Discovery
• Isolates client from specific terms of Service
  Contract

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Service Interface

• Is Accessed by
• Service Adapter (Service Requester)
• Has Access to
• Business Components
• Common Infrastructure

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Service Interface

• Role Responsibilities
• Exposes Methods of Business
• Components
• Manages Data Transformation
• Includes Discovery

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OERA Component Model
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OERA Component Model
Client
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Business Components
Business Components
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Business Components
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Business Workflow

• Is Accessed by
• Service Interface
• Business Workflow
• Has Access to
• 1M Business Workflow
• 1M Business Tasks
• 1M Business Entities

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Business Workflow

• Role Responsibilities
• Manages Multi-Step Process
• Manages State, NOT Transaction
• Exposes Methods to Service Interface

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Business Task

• Is Accessed by
• Service Interface
• Business Workflow
• Business Task
• Has Access to
• 1M Business Entities
• Common Infrastructure

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Business Task

• Role Responsibilities
• Manages process gt 1 Business Entity
• Must complete in a single
• process/transaction
• Manages Transactions
• Exposes Methods to Service Interface

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Business Entity

• Is Accessed by
• Service Interface
• Business Workflow
• Business Task
• Has Access to
• Data Access Object
• Common Infrastructure

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Business Entity

• Role Responsibilities
• Encapsulates Business Logic
• No knowledge of Physical DataSource
• Exposes Methods to Service Interface
• Manages Transaction

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OERA Component Model
Business Components
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OERA Component Model
Client
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Data Access Components
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Data Access Object

• Is Accessed by
• Business Entity
• Has Access to
• 1M Data Source Objects
• Common Infrastructure

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Data Access Object

• Role Responsibilities
• Aggregates Manages 1M 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

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Data Source Object

• Is Accessed by
• 1M Data Access Objects
• Has Access to
• Data Source
• Common Infrastructure

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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

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OERA Component Model
Data Access Components
Client
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OERA Component Model
Client
Client
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Presentation Layer
Client
Client Business Component
Presenter
Service Adapter
View
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Client Business Component (Model)

• Is Accessed by
• Client Presenter
• Has Access to
• Service Adapter
• Client Common Infrastructure

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Client Business Component (Model)

• Role Responsibilities
• Client representation of Service
• Provider Business Component
• Encapsulates client-side business logic
• Manages Data Instance

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Client Presenter

• Is Accessed by
• Client View
• Has Access to
• Client Business Component
• Client View
• Client Common Infrastructure

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Client Presenter

• Role Responsibilities
• Handles events for Presentation
• Coordinates presentation components

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Client View

• Is Accessed by
• Client Presenter
• User!
• Has Access to
• Client Common Infrastructure

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Client View

• Role Responsibilities
• Contains visual components
• Displays data provided by Client
• Business Component

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OERA Component Model
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OERA Component Model
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Enterprise Services

• Service Provider acting as a Service Requester
• Service Adapter
• Accessed by Business Components (outbound)
• Accesses Service Provider Service Interface
  (inbound)

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OERA Component Model
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For More Information, go to

• PSDN
• http//www.psdn.com
• OpenEdge Principles
• http//www.psdn.com/library/kbcategory.jspa?catego
  ryID230
• OpenEdge Principles Forum
• http//www.psdn.com/library/forum.jspa?forumID11

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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

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Questions?
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Thank you foryour time
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