![You Might Need a Messaging Bus If... Bob Pasker [email_address]](https://image.slidesharecdn.com/messaging-1213669422361146-9/85/Messaging-1-320.jpg)
Messaging
- 1. You Might Need a Messaging Bus If... Bob Pasker [email_address]
- 2. Decoupling Buffering – arrival time v. service time Latency – e.g., over WAN Asynchronicity – “send it and forget it” Protocol matching: push, pull, RPC Gateways to/from other domains “Least common denominator” communication
- 3. Delivery Protocols Broadcast (Pub/Sub) PTP options: one-to-many (round robin), many-to-one (joining), many-to-many (mesh) Scatter/Gather
- 4. Delivery Mechanisms Scheduling – round-robin, least busy, by class Routing/dispatching – affinity, data-dependency, partitioned Brokering/Anonymity – virtual addressing
- 5. Delivery Ordering Idempotency Correlation Sequencing
- 6. Message Processing Translation/Formatting/Normalizing Data Enhancement/Reduction Parsing Filtering Security Policy Splitting/Aggregating Workflow
- 7. Reliability/Scalability Ephemeral/transient, reliable, transactional, exactly once Store-and-forward Durable endpoints Failover Bus architecture, n connections, instead of n(n-1) in a mesh
- 8. Development Independence/Isolation from other parts of the app Message Replay Testing Post processing message analysis
- 9. Management Auditing/Wire-tapping Logging/History Control Flush/Replay Dead-letter processing Dashboard