Events Modelling

Focuses on

The Business Narrative

e.g.

Ride Requested

Ride Scheduled

The Customer Experience

The Information Context

Consists of

Events

These are the ones recorded to Kafka

Commands

Read Models

Patterns that reduce cost and risks

CQRS

Event Sourcing

Diverse Options for Read Models

Clear System Boundaries / Contracts

What is an Event?

The record of an important business occurrence, decision, or outcome

"What would I have to write down in order to understand this business process?"

Events have a name/type and a data payload

The Stream of all such Events comprise the causal narrative of a bounded context

Event Data

Denormalized

Data covering

All data that is required to understand the event is contained in the event

Large Blobs such as sound or images can use the claim check pattern

Eg. Using the URI of the image instead of the image itself