Default arguments of CLI

Default arguments of CLI

You can use function-related commands in the pulsar-admin CLI to deploy functions. Pulsar provides a variety of commands, such as:

create command for deploying functions in cluster mode
trigger command for triggering functions

The following table lists the parameters required in CLI and their default values.

Parameter	Default value
Function name	N/A You can specify any value for the function name (except org, library, or similar class names).
Tenant	N/A The value is derived from the name of the input topics. For example, if the input topic form is `persistent://marketing/{namespace}/{topicName}`, the tenant name is `marketing`.
Namespace	N/A The value is derived from the input topic name. If the input topic form is `persistent://marketing/asia/{topicName}`, the namespace is `asia`.
Output topic	`{input topic}-{function name}-output`. For example, if an input topic name of a function is `incoming` and the function name is `exclamation`, the output topic name is `incoming-exclamation-output`.
Processing guarantees	`ATLEAST_ONCE`
Pulsar service URL	`pulsar://localhost:6650`

Take the create command for example. The following function has default values for the function name (MyFunction), tenant (public), namespace (default), subscription type (SHARED), processing guarantees (ATLEAST_ONCE), and Pulsar service URL (pulsar://localhost:6650).

bin/pulsar-admin functions create \
  --jar $PWD/my-pulsar-functions.jar \
  --classname org.example.MyFunction \
  --inputs my-function-input-topic1,my-function-input-topic2