This image shows publish-subscribe architecture for communication between publisher and subscriber apps.

• The first app publishes messages to Topic A.
• The second app publishes messages to Topic A and Topic B.
• Either OCI Streaming or TEQ receive published messages and republish them to subscriber apps and services:
  • The first subscribing app receives messages published to Topic A and Topic B.
  • The second subscribing app receives messages published to Topic B.
  • Messages published to Topic A are persisted in the Oracle Autonomous Database.