Google Cloud Pub/Sub

GCP Pub/Sub isolation is achieved by having each sandboxed consumer create its own subscription. This ensures the sandboxed consumer receives a copy of all messages published to the topic. The consumer then filters messages based on a routing key in the message attributes, processing only those intended for its sandbox or RouteGroup.

Alternatively, use ResourcePlugins to create sandbox-specific topics if needed.

Resources

• End-to-end Pub/Sub testing tutorial

Summary

• Each sandboxed consumer creates its own subscription to receive all messages.
• Use message attributes for routing key propagation.
• Consumers filter messages by attribute.
• Optionally, create sandbox-specific topics/subscriptions.