Enterprise Integration Patterns
- 1. Enterprise Integration Patterns Introduction to Gregor Hohpe and Bobby Woolf’s book. David Kemp, Jan 2006
- 2. Enterprise Integration Usually Involves Messaging
- 3. Alternatives to Messaging Remote Procedure Invocation File Transfer Shared Database
- 4. Messaging The book (and this talk) focuses on messaging. What is messaging? Program-to-program communication. Asynchronous. Information exchanged as messages on channels . Optional features: Reliable (durable) Transactional
- 5. Messaging Systems Support Store and Forward Language and/or platform independent. Computer 1 Sending application 1. Create 2. Send Receiving application 5. Process 4. Receive 3. Deliver Computer 2 Channel
- 6. Why use messaging Platform/Language integration Asynchronous communication Allow disconnected operation Improve thread utilization Reliability Throttling
- 7. Challenges Complex programming model Sequence issues Synchronous scenarios Performance Limited platform support Vendor lock-in
- 8. An Example: Widgets & Gadgets R’ Us Web Interface Call Centre Inbound Fax Outbound Email Billing/Accounting Shipping Widget Inventory Widget Catalog Gadget Inventory Gadget Catalog
- 9. Taking Orders Call Centre Inbound fax Web Interface Channel Adapter Channel Adapter Gateway Point to point channel New Order Message Point to point channel Point to point channel Publish-Subscribe Channel Message translator Message translator Message translator
- 10. Order Processing New Order Message Publish-Subscribe Channel Billing/ Accounting Inventory Point to point channel Aggregator Content- Based Router Invalid Order Publish-Subscribe Channel Billing/ Accounting Shipping
- 11. Messaging Patterns Messaging System Patterns Messaging Channel Patterns Message Construction Patterns Message Routing Patterns Message Transformation Patterns Messaging Endpoint Patterns System Management Patterns