API's and implementations to support L2 Gateways in Neutron.
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# Copyright (c) 2014 OpenStack Foundation
#
# 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.
import abc
class API(object, metaclass=abc.ABCMeta):
def __init__(self, context):
self.context = context
@abc.abstractmethod
def transaction(self, check_error=False, log_errors=True, **kwargs):
"""Create a transaction
:param check_error: Allow the transaction to raise an exception?
:type check_error: bool
:param log_errors: Log an error if the transaction fails?
:type log_errors: bool
:returns: A new transaction
:rtype: :class:`Transaction`
"""
@abc.abstractmethod
def db_find(self, table, *conditions, **kwargs):
"""Create a command to return find OVSDB records matching conditions
:param table: The OVS table to query
:type table: string
:param conditions:The conditions to satisfy the query
:type conditions: 3-tuples containing (column, operation, match)
Type of 'match' parameter MUST be identical to column
type
Examples:
atomic: ('tag', '=', 7)
map: ('external_ids' '=', {'iface-id': 'xxx'})
field exists?
('external_ids', '!=', {'iface-id', ''})
set contains?:
('protocols', '{>=}', 'OpenFlow13')
See the ovs-vsctl man page for more operations
:param columns: Limit results to only columns, None means all columns
:type columns: list of column names or None
:returns: :class:`Command` with [{'column', value}, ...] result
"""
@abc.abstractmethod
def get_physical_sw_list(self):
"""Create a command to list Physical Switches."""