text: # Copyright 2016 Blue Box, an IBM Company
  #
  # 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 taskflow.patterns import linear_flow
  
  from octavia.common import constants
  from octavia.controller.worker.v2.tasks import amphora_driver_tasks
  from octavia.controller.worker.v2.tasks import database_tasks
  from octavia.controller.worker.v2.tasks import lifecycle_tasks
  
  
  class L7RuleFlows(object):
  
      def get_create_l7rule_flow(self):
          """Create a flow to create an L7 rule
  
          :returns: The flow for creating an L7 rule
          """
          create_l7rule_flow = linear_flow.Flow(constants.CREATE_L7RULE_FLOW)
          create_l7rule_flow.add(lifecycle_tasks.L7RuleToErrorOnRevertTask(
              requires=[constants.L7RULE,
                        constants.LISTENERS,
                        constants.LOADBALANCER]))
          create_l7rule_flow.add(database_tasks.MarkL7RulePendingCreateInDB(
              requires=constants.L7RULE))
          create_l7rule_flow.add(amphora_driver_tasks.ListenersUpdate(
              requires=constants.LOADBALANCER_ID))
          create_l7rule_flow.add(database_tasks.MarkL7RuleActiveInDB(
              requires=constants.L7RULE))
          create_l7rule_flow.add(database_tasks.MarkL7PolicyActiveInDB(
              requires=constants.L7POLICY))
          create_l7rule_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
              requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))
  
          return create_l7rule_flow
  
      def get_delete_l7rule_flow(self):
          """Create a flow to delete an L7 rule
  
          :returns: The flow for deleting an L7 rule
          """
          delete_l7rule_flow = linear_flow.Flow(constants.DELETE_L7RULE_FLOW)
          delete_l7rule_flow.add(lifecycle_tasks.L7RuleToErrorOnRevertTask(
              requires=[constants.L7RULE,
                        constants.LISTENERS,
                        constants.LOADBALANCER]))
          delete_l7rule_flow.add(database_tasks.MarkL7RulePendingDeleteInDB(
              requires=constants.L7RULE))
          delete_l7rule_flow.add(amphora_driver_tasks.ListenersUpdate(
              requires=constants.LOADBALANCER_ID))
          delete_l7rule_flow.add(database_tasks.DeleteL7RuleInDB(
              requires=constants.L7RULE))
          delete_l7rule_flow.add(database_tasks.MarkL7PolicyActiveInDB(
              requires=constants.L7POLICY))
          delete_l7rule_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
              requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))
  
          return delete_l7rule_flow
  
      def get_update_l7rule_flow(self):
          """Create a flow to update an L7 rule
  
          :returns: The flow for updating an L7 rule
          """
          update_l7rule_flow = linear_flow.Flow(constants.UPDATE_L7RULE_FLOW)
          update_l7rule_flow.add(lifecycle_tasks.L7RuleToErrorOnRevertTask(
              requires=[constants.L7RULE,
                        constants.LISTENERS,
                        constants.LOADBALANCER]))
          update_l7rule_flow.add(database_tasks.MarkL7RulePendingUpdateInDB(
              requires=constants.L7RULE))
          update_l7rule_flow.add(amphora_driver_tasks.ListenersUpdate(
              requires=constants.LOADBALANCER_ID))
          update_l7rule_flow.add(database_tasks.UpdateL7RuleInDB(
              requires=[constants.L7RULE, constants.UPDATE_DICT]))
          update_l7rule_flow.add(database_tasks.MarkL7RuleActiveInDB(
              requires=constants.L7RULE))
          update_l7rule_flow.add(database_tasks.MarkL7PolicyActiveInDB(
              requires=constants.L7POLICY))
          update_l7rule_flow.add(database_tasks.MarkLBAndListenersActiveInDB(
              requires=(constants.LOADBALANCER_ID, constants.LISTENERS)))
  
          return update_l7rule_flow
  