Event Driven Architecture

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Event Driven Architecture

• Arne Jørgensen
• QuestPoint AS
• arne_at_questpoint.no

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Agenda

• What is EDA?
• Processing types
• Architecture
• SOA 2.0? - EDA vs. SOA
• Process agility

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Dont believe the hype?

• EDA will radically change IT!
• EDA is nothing new!
• EDA is SOA 2.0!

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What is EDA?

• Architecture, not a product (again...)
• Focus on Events (duh!)
• What is an event?
• ...a notable thing that happens...
• A message signifying that an identifiable event
  has happened
• Common event information
• Event type specific data
• Event instance specific data

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What is EDA

• Emitting and consumption of events
• Publish-subscribe pattern
• Asynchronous processing
• De-coupling of supplier and consumer
• Non-deterministic behaviour

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Basic Architecture
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Processing types

• Simple Event Processing
• Receive and react
• Event Stream Processing
• Filter and evaluate
• E.g. RFID
• Complex Event Processing
• Complex evaluation
• E.g. fraud detection

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Simple Event Processing
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Event Stream Processing
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Complex Event Processing
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EDA vs. SOA

• EDA is SOA 2.0?
• Synchronous vs. asynchronous
• SOA implementations very often are synchronous
• EDA is asynchronous
• Loosely coupled vs. decoupled
• SOA client knows about service
• EDA client does not know about service
• Technical vs. processual agility

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SOA or EDA?

• SOA
• Vertical integration
• Request-response scenario
• Transactional processes
• EDA
• Horizontal integration
• Workflow
• Process extension points

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Process agility
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Extended architecture
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Discussions?

• IASA www.iasa.no
• NNUG www.nnug.no
• arne_at_questpoint.no