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# Copyright 2015 Futurewei. All rights reserved.
#
# 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 oslo_log import helpers as log_helpers
from oslo_log import log as logging
from oslo_utils import excutils
from neutron_lib.db import api as db_api
from neutron_lib.plugins import directory
from networking_sfc.db import flowclassifier_db as fc_db
from networking_sfc.extensions import flowclassifier as fc_ext
from networking_sfc.services.flowclassifier.common import context as fc_ctx
from networking_sfc.services.flowclassifier.common import exceptions as fc_exc
from networking_sfc.services.flowclassifier import driver_manager as fc_driver
LOG = logging.getLogger(__name__)
class FlowClassifierPlugin(fc_db.FlowClassifierDbPlugin):
"""Implementation of the Plugin."""
supported_extension_aliases = [fc_ext.FLOW_CLASSIFIER_EXT]
path_prefix = fc_ext.FLOW_CLASSIFIER_PREFIX
def __init__(self):
self.driver_manager = fc_driver.FlowClassifierDriverManager()
super().__init__()
self.driver_manager.initialize()
def _get_port(self, context, id):
port = super()._get_port(context, id)
return directory.get_plugin().get_port(context, port['id'])
@log_helpers.log_method_call
def create_flow_classifier(self, context, flow_classifier):
with db_api.CONTEXT_WRITER.using(context):
fc_db = super().create_flow_classifier(
context, flow_classifier)
fc_db_context = fc_ctx.FlowClassifierContext(self, context, fc_db)
self.driver_manager.create_flow_classifier_precommit(
fc_db_context)
try:
self.driver_manager.create_flow_classifier_postcommit(
fc_db_context)
except fc_exc.FlowClassifierDriverError as e:
LOG.exception(e)
with excutils.save_and_reraise_exception():
LOG.error("Create flow classifier failed, "
"deleting flow_classifier '%s'",
fc_db['id'])
self.delete_flow_classifier(context, fc_db['id'])
return fc_db
@log_helpers.log_method_call
def update_flow_classifier(self, context, id, flow_classifier):
with db_api.CONTEXT_WRITER.using(context):
original_flowclassifier = self.get_flow_classifier(context, id)
updated_fc = super().update_flow_classifier(
context, id, flow_classifier)
fc_db_context = fc_ctx.FlowClassifierContext(
self, context, updated_fc,
original_flowclassifier=original_flowclassifier)
self.driver_manager.update_flow_classifier_precommit(fc_db_context)
try:
self.driver_manager.update_flow_classifier_postcommit(
fc_db_context)
except fc_exc.FlowClassifierDriverError as e:
LOG.exception(e)
with excutils.save_and_reraise_exception():
LOG.error("Update flow classifier failed, "
"flow_classifier '%s'",
updated_fc['id'])
return updated_fc
@log_helpers.log_method_call
def delete_flow_classifier(self, context, id):
fc = self.get_flow_classifier(context, id)
fc_context = fc_ctx.FlowClassifierContext(self, context, fc)
try:
self.driver_manager.delete_flow_classifier(fc_context)
except fc_exc.FlowClassifierDriverError as e:
LOG.exception(e)
with excutils.save_and_reraise_exception():
LOG.error("Delete flow classifier failed, "
"flow_classifier '%s'", id)
with db_api.CONTEXT_WRITER.using(context):
fc = self.get_flow_classifier(context, id)
fc_context = fc_ctx.FlowClassifierContext(self, context, fc)
super().delete_flow_classifier(context, id)
self.driver_manager.delete_flow_classifier_precommit(fc_context)
self.driver_manager.delete_flow_classifier_postcommit(fc_context)
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