Pub Sub – App to App or Service to Service Integration

Sample Use Case - Service (BigQuery) to Service (GCS) copying of data

1. BigQuery has a scheduled Query feature that is able to call PubSub on completion. When new data is available in Bigquery, the default SA for BigQuery is able to write to a pub sub topic.
2. The function triggers a call to a pub sub topic.
3. The pub sub triggers another cloud function which copies data from BigQuery to GCS.