Publish-Subscribe

Overview
New? Start here.
Design
Architecture vs Design
Design Challenges
Design Goals
Concepts
Standards Based Design
Data Standards
Design Patterns
Clinical Serialization Standards
Security Standards
Serialization Standards
Terminology Standards
Transport Standards
Stereographic Projection
Event-Driven Design
Cultural-Dependent Design
Service Interface Design
Contract-Based Design
Distributed Transaction Design
Testability Design
Code Generation Design
Science of Great User Experiences
Visual Design
Glossary

Publish-Subscribe is a MEP where publishers of messages are not programmed to send those messages to specific receivers. Instead, the message is published to a “channel” and zero or more receivers could subscribe to that “channel” and receive a copy of that message. If there are no subscribers, the message gets lost without anyone having seen it.

With an ESB Publish-Subscribe is implemented with a Topic. If one also needs At Least Once or Exactly Once, one would combine the Topic with a Topic to Queue Bridge.