text: # -*- coding: utf-8 -*-
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  # 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
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  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  
  from airflow.sensors.base_sensor_operator import BaseSensorOperator
  from airflow.utils.decorators import apply_defaults
  
  
  class NamedHivePartitionSensor(BaseSensorOperator):
      """
      Waits for a set of partitions to show up in Hive.
  
      :param partition_names: List of fully qualified names of the
          partitions to wait for. A fully qualified name is of the
          form ``schema.table/pk1=pv1/pk2=pv2``, for example,
          default.users/ds=2016-01-01. This is passed as is to the metastore
          Thrift client ``get_partitions_by_name`` method. Note that
          you cannot use logical or comparison operators as in
          HivePartitionSensor.
      :type partition_names: list[str]
      :param metastore_conn_id: reference to the metastore thrift service
          connection id
      :type metastore_conn_id: str
      """
  
      template_fields = ('partition_names',)
      ui_color = '#8d99ae'
  
      @apply_defaults
      def __init__(self,
                   partition_names,
                   metastore_conn_id='metastore_default',
                   poke_interval=60 * 3,
                   hook=None,
                   *args,
                   **kwargs):
          super().__init__(
              poke_interval=poke_interval, *args, **kwargs)
  
          self.next_index_to_poke = 0
          if isinstance(partition_names, str):
              raise TypeError('partition_names must be an array of strings')
  
          self.metastore_conn_id = metastore_conn_id
          self.partition_names = partition_names
          self.hook = hook
          if self.hook and metastore_conn_id != 'metastore_default':
              self.log.warning(
                  'A hook was passed but a non defaul metastore_conn_id=%s was used', metastore_conn_id
              )
  
      @staticmethod
      def parse_partition_name(partition):
          first_split = partition.split('.', 1)
          if len(first_split) == 1:
              schema = 'default'
              table_partition = max(first_split)  # poor man first
          else:
              schema, table_partition = first_split
          second_split = table_partition.split('/', 1)
          if len(second_split) == 1:
              raise ValueError('Could not parse ' + partition +
                               'into table, partition')
          else:
              table, partition = second_split
          return schema, table, partition
  
      def poke_partition(self, partition):
          if not self.hook:
              from airflow.providers.apache.hive.hooks.hive import HiveMetastoreHook
              self.hook = HiveMetastoreHook(
                  metastore_conn_id=self.metastore_conn_id)
  
          schema, table, partition = self.parse_partition_name(partition)
  
          self.log.info('Poking for %s.%s/%s', schema, table, partition)
          return self.hook.check_for_named_partition(
              schema, table, partition)
  
      def poke(self, context):
  
          number_of_partitions = len(self.partition_names)
          poke_index_start = self.next_index_to_poke
          for i in range(number_of_partitions):
              self.next_index_to_poke = (poke_index_start + i) % number_of_partitions
              if not self.poke_partition(self.partition_names[self.next_index_to_poke]):
                  return False
  
          self.next_index_to_poke = 0
          return True
  