Source code for airflow.providers.apache.kafka.hooks.client

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from __future__ import annotations

from typing import Any, Sequence

from confluent_kafka import KafkaException
from confluent_kafka.admin import AdminClient, NewTopic

from airflow.providers.apache.kafka.hooks.base import KafkaBaseHook


[docs]class KafkaAdminClientHook(KafkaBaseHook):
    """
    A hook for interacting with the Kafka Cluster.

    :param kafka_config_id: The connection object to use, defaults to "kafka_default"
    """

    def __init__(self, kafka_config_id=KafkaBaseHook.default_conn_name) -> None:
        super().__init__(kafka_config_id=kafka_config_id)

    def _get_client(self, config) -> AdminClient:
        return AdminClient(config)

[docs]    def create_topic(
        self,
        topics: Sequence[Sequence[Any]],
    ) -> None:
        """Create a topic.

        :param topics: a list of topics to create including the number of partitions for the topic
          and the replication factor. Format: [ ("topic_name", number of partitions, replication factor)]
        """
        admin_client = self.get_conn

        new_topics = [NewTopic(t[0], num_partitions=t[1], replication_factor=t[2]) for t in topics]

        futures = admin_client.create_topics(new_topics)

        for t, f in futures.items():
            try:
                f.result()
                self.log.info("The topic %s has been created.", t)
            except KafkaException as e:
                if e.args[0].name == "TOPIC_ALREADY_EXISTS":
                    self.log.warning("The topic %s already exists.", t)
                else:
                    raise