Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions (Addison-Wesley Signature Series (Fowler))

by Hohpe Gregor

Connecting the individual components inside the management console through delegates and events results in a loosely coupled architecture. This architecture allows us to reuse the individual components and recompose them into different constellations similar to the Pipes and Filters (70) architectural style introduced at the beginning of the book. Essentially, passing messages arriving on the Control Bus (540) by using delegates resembles creating an application-internal Publish-Subscribe Channel (106). Because the control bus events arrive on a Point-to-Point Channel (103), we have to use a single consumer, which then publishes the event to any interested subscriber inside the application.