Specifies where to send notifications upon changes to a data store.

JSON representation
  "pubsubTopic": string


The Cloud Pub/Sub topic that notifications of changes are published on. Supplied by the client. PubsubMessage.Data contains the resource name. PubsubMessage.MessageId is the ID of this message. It is guaranteed to be unique within the topic. PubsubMessage.PublishTime is the time at which the message was published. Notifications are only sent if the topic is non-empty. Topic names must be scoped to a project. Cloud Healthcare API service account must have publisher permissions on the given Cloud Pub/Sub topic. Not having adequate permissions causes the calls that send notifications to fail.

If a notification can't be published to Cloud Pub/Sub, errors are logged to Cloud Logging (see Viewing logs). If the number of errors exceeds a certain rate, some aren't submitted.