[GitHub] [airflow] kaxil commented on a change in pull request #7407: [AIRFLOW-6786] Add KafkaConsumerHook, KafkaProduerHook and KafkaSensor

[GitBox <gi...@apache.org>]

kaxil commented on a change in pull request #7407:
URL: https://github.com/apache/airflow/pull/7407#discussion_r422555228



##########
File path: airflow/providers/apache/kafka/sensors/kafka_sensor.py
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@@ -0,0 +1,84 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+import logging
+
+from cached_property import cached_property
+
+from airflow.providers.apache.kafka.hooks.kafka_consumer_hook import KafkaConsumerHook
+from airflow.sensors.base_sensor_operator import BaseSensorOperator
+from airflow.utils.decorators import apply_defaults
+
+
+class KafkaSensor(BaseSensorOperator):
+    """
+    Consumes the Kafka message with the specific topic
+    """
+    DEFAULT_HOST = 'kafka1'
+    DEFAULT_PORT = 9092
+    templated_fields = ('topic',
+                        'host',
+                        'port',
+                        )
+
+    @apply_defaults
+    def __init__(self, topic, host=DEFAULT_HOST, port=DEFAULT_PORT, *args, **kwargs):
+        """
+            Initialize the sensor, the connection establish
+            is put off to it's first time usage.
+
+        :param topic:
+        :param host:
+        :param port:
+        :param args:
+        :param kwargs:
+        """
+        self.topic = topic
+        self.host = host
+        self.port = port
+        super(KafkaSensor, self).__init__(*args, **kwargs)
+
+    @cached_property
+    def hook(self):
+        """
+            Returns a Kafka Consumer Hook
+
+        :return:
+        KafkaConsumerHook

Review comment:
       ```suggestion
           """
           Returns a Kafka Consumer Hook
   ```




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