To configure the GCP PubSub Subscriber Agent, double-click on the agent icon or select the Edit agent 
button after left-clicking on the agent in the Workflow Editor. After opening the Agent Configuration, you can set a name for the agent using the Name field.
Main Tab
The GCP PubSub Subscriber Main tab contains settings related to the profile and handling of messages for subscription and retrieval by the agent.
GCP PubSub Subscriber configuration - Main tab
Setting | Description |
|---|---|
GCP Pub/Sub Profile | This is the profile to use for subscription. For more information, see GCP PubSub Profile. |
Ack Timeout in Seconds | This refers to the timeout interval for acknowledgements to messages received by the agent. |
Endpoint | The custom URL that you must specify for using the GCP services. The Endpoint must be specified in the format host:port. |
Advanced Tab
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GCP PubSub Subscriber configuration - Advanced tab
Setting | Description |
|---|---|
Flow Control | |
Max Outstanding Messages | Maximum number of messages to be retrieved from PubSub. If not specified, all outstanding messages will be retrieved from PubSub until they are all processed for the subscription. You are required to specify numbers within the range of 1-9999999999. |
Max Outstanding Kilobytes | This is the threshold for messages to be retrieved based on the configured kilobytes. Once the size is met, all messages within the threshold will be retrieved in a batch for collection. You are required to specify numbers within the range of 1-9999999999. |
Concurrency Control | |
Parallel Streams | This is the number of streams available or open for subscribers to receive messages. You are required to specify numbers within the range of 1-50. |
Executor Threads | The number of threads for each stream to handle incoming messages. You are required to specify numbers within the range of 1-50. |