1. Chapter 5

2. Service describes End Point Exposes Messages Sends/Receives Contracts Binds to Service Consumer implements Policy governed by Sends/Receives Adheres to Component Relation Key Understands Serves

3. Requestor Replier Service (replier) Service (replier) Consumer (requestor) Consumer (requestor) ServicesObjects in a Process Computer A Computer B Process A Process B Process Same address space Network

4. Service EndPoint Synchronous processing Synchronous processing 1. Request 2. 3. Reply Service Consumer

5. Service EndPoint Package reaction Package reaction 1. Request 2. 5. Reaction Service Consumer EndPoint Send Reaction Send Reaction 3. Process Request Process Request 4.

6. Delays Operational Picture AirportsSchedulesReservationsWeather

7. Delays Operational Picture AirportsSchedulesReservationsWeather Events Request/ Reply

8. Edge Event/Notification Service Consumer Event/Notification EndPoint Event/Notification Event Propagation Package Events Package Events (Subscriptions) Route Event Handler Dispatch Relevancy Filter Relevancy Filter Service Request Reply

9. Edge EndPoint Request Event/Notification Service Consumer Event/Notification EndPoint Event/Notification Event Propagation Package Events Package Events Dispatch Route Event Handler Dispatch Relevancy Filter Relevancy Filter Service Request Reply Obsolete

11. Active Closing cancel Exiting Compensating Ended Completed Faulting Cancelling Exit Fault completed canceled close compensate closed Fault compensated Faulted exited