text: #   Copyright 2020-2021 Exactpro (Exactpro Systems Limited)
  #
  #   Licensed 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.
  
  from abc import ABC, abstractmethod
  
  from th2_grpc_common.common_pb2 import Direction
  
  from th2_common.schema.filter.strategy.impl.default_filter_strategy import DefaultFilterStrategy
  from th2_common.schema.message.configuration.message_configuration import QueueConfiguration
  from th2_common.schema.message.impl.rabbitmq.abstract_rabbit_subscriber import AbstractRabbitSubscriber
  from th2_common.schema.message.impl.rabbitmq.connection.connection_manager import ConnectionManager
  
  
  class Metadata:
  
      def __init__(self, sequence, message_type: str, direction: Direction, session_alias: str) -> None:
          self.sequence = sequence
          self.message_type = message_type
          self.direction = direction
          self.session_alias = session_alias
  
  
  class AbstractRabbitBatchSubscriber(AbstractRabbitSubscriber, ABC):
  
      def __init__(self, connection_manager: ConnectionManager, queue_configuration: QueueConfiguration,
                   filter_strategy=DefaultFilterStrategy(), *subscribe_targets) -> None:
          super().__init__(connection_manager, queue_configuration, *subscribe_targets)
          self.filters = queue_configuration.filters
          self.filter_strategy = filter_strategy
  
      def filter(self, batch) -> bool:
          messages = [msg for msg in self.get_messages(batch) if
                      self.filter_strategy.verify(message=msg, router_filters=self.filters)]
          return len(messages) > 0
  
      @abstractmethod
      def get_messages(self, batch) -> list:
          pass
  
      @abstractmethod
      def extract_metadata(self, message) -> Metadata:
          pass
  