Remove unneeded DB register retrieval and refresh in network update
The first DB operation done during a network update is a network DB
register retrieval. This information is stored in memory during
the DB transaction context and it's updated with any change done
to the DB register and the relationships; e.g., the network DB model
field "qos_policy_binding" is a backref relationship with a
"qos_network_policy_bindings" DB register. When a
"qos_network_policy_bindings" register is created, updated or
deleted, the network DB object, holding the relationship, will be
updated too.
There is no need therefore to retrieve again the DB object and
force a session update. The DB object contains the updated
information.
Trivial-Fix
Conflicts:
neutron/plugins/ml2/plugin.py
Change-Id: I0c10b824c0f919607bb6ea31c5533ce7bd65df42
(cherry picked from commit 0e8ebf133d
)
This commit is contained in:
parent
408c63af97
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@ -1074,7 +1074,8 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
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need_network_update_notify = False
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with db_api.CONTEXT_WRITER.using(context):
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original_network = self.get_network(context, id)
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db_network = self._get_network(context, id)
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original_network = self.get_network(context, id, net_db=db_network)
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self._update_provider_network_attributes(
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context, original_network, net_data)
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@ -1085,12 +1086,6 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
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updated_network)
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self._process_l3_update(context, updated_network, net_data)
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# ToDO(QoS): This would change once EngineFacade moves out
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db_network = self._get_network(context, id)
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# Expire the db_network in current transaction, so that the join
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# relationship can be updated.
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context.session.expire(db_network)
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if (mtuw_apidef.MTU in net_data or
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# NOTE(ihrachys) mtu may be null for existing networks,
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# calculate and update it as needed; the conditional can be
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@ -1137,11 +1132,11 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
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return updated_network
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@db_api.retry_if_session_inactive()
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def get_network(self, context, id, fields=None):
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def get_network(self, context, id, fields=None, net_db=None):
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# NOTE(ihrachys) use writer manager to be able to update mtu
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# TODO(ihrachys) remove in Queens+ when mtu is not nullable
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with db_api.CONTEXT_WRITER.using(context):
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net_db = self._get_network(context, id)
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net_db = net_db or self._get_network(context, id)
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# NOTE(ihrachys) pre Pike networks may have null mtus; update them
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# in database if needed
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