69 lines
2.4 KiB
Python
69 lines
2.4 KiB
Python
# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron._i18n import _
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class _FeatureFlag(object):
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def is_compatible(self, value):
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if value == self.requires:
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return True
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if value and self.supports:
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return True
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return False
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def __init__(self, supports, requires):
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self.supports = supports
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self.requires = requires
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if requires and not supports:
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raise RuntimeError(_("A driver can't require a feature and not "
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"support it."))
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UNSUPPORTED = _FeatureFlag(supports=False, requires=False)
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OPTIONAL = _FeatureFlag(supports=True, requires=False)
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MANDATORY = _FeatureFlag(supports=True, requires=True)
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class L3ServiceProvider(object):
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"""Base class for L3 service provider drivers.
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On __init__ this will be given a handle to the l3 plugin. It is then the
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responsibility of the driver to subscribe to the events it is interested
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in (e.g. router_create, router_update, router_delete, etc).
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The 'ha' and 'distributed' attributes below are used to determine if a
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router request with the 'ha' or 'distributed' attribute can be supported
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by this particular driver. These attributes must be present.
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The 'use_integrated_agent_scheduler' flag indicates whether or not routers
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which belong to the driver should be automatically scheduled using the L3
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agent scheduler integrated into Neutron.
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"""
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ha_support = UNSUPPORTED
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distributed_support = UNSUPPORTED
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use_integrated_agent_scheduler = False
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def __init__(self, l3plugin):
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self.l3plugin = l3plugin
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def owns_router(self, context, router_id):
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"""Returns True if router is associated with driver, else False."""
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if not router_id:
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return False
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return self.l3plugin.l3_driver_controller.get_provider_for_router(
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context, router_id) == self
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