Knative in Action

6 Introduction to Eventing

This chapter covers

• The nature, purpose, and anatomy of CloudEvents
• A basic walkthrough of creating CloudEvents and using triggers
• The major subcomponents of Eventing

Here comes the next big section. I approach it with some trepidation.

In some sense, Serving is simple: do a thing. Eventing is: say a thing, hear a thing. In Serving, the intention to do and thing done have a relatively predictable temporal coupling. But in Eventing, I can be saying things long before these are heard. I can listen for things that will never be heard. I can hear things long since said. The shoe store point-of-sale system can emit events for sales before the sales forecasting system exists to process events. The inventory system can ...