Google PubSub is a messaging service that decouples services that produce events from services that process events. You can use Google PubSub as a messaging-oriented middleware or for event ingestion and delivery for streaming analytics pipelines.

Google PubSub offers durable message storage and real-time message delivery with high availability and consistent performance at scale. You can run Google PubSub servers in all the available Google Cloud regions around the world.

Before you use Google PubSub Connector, you must complete the following prerequisite tasks:

Ensure that your organization has the Google PubSub Connector license.
Ensure that you have a Google service account to access Google PubSub.
Ensure that you have the PROJECTID, CLIENTEMAIL, PRIVATE KEY, PRIVATEKEYID, and CLIENTID values for the Google service account. You will need to enter these details when you create a Google PubSub connection.
Ensure that you have enabled the
Google PubSub API
for your Google Cloud project. Google PubSub Connector uses the Google APIs to integrate with Google PubSub.

For more information about the required permissions and the access control options available for a Google PubSub user, see the Google Cloud Pub/Sub documentation.

A Google PubSub topic can have multiple subscriptions. However, one subscription belongs to one single topic. To receive messages published to a topic, you must have a subscription to that topic. Messages are no longer visible in the subscription after they are acknowledged. The Google PubSub connector uses the synchronous pull mechanism to read the subscribed messages.