Eventarc

Eventarc lets you asynchronously deliver events from Google services, SaaS, and your own apps using loosely coupled services that react to state changes.

https://cloud.google.com/blog/topics/developers-practitioners/eventarc-unified-eventing-experience-google-cloud

Quickstart

https://cloud.google.com/eventarc/docs/run/create-trigger-cloud-audit-logs-gcloud

Examples

Event-driven orchestration with Eventarc and Workflows

https://codelabs.developers.google.com/codelabs/cloud-event-driven-orchestration

Path pattern filtering

https://medium.com/google-cloud/applying-a-path-pattern-when-filtering-in-eventarc-f06b937b4c34