232 lines
11 KiB
Python
232 lines
11 KiB
Python
# Copyright 2014 Rackspace
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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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import logging
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from oslo_db import exception as odb_exceptions
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from oslo_utils import excutils
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import pecan
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from wsme import types as wtypes
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from wsmeext import pecan as wsme_pecan
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from octavia.api.v1.controllers import base
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from octavia.api.v1.controllers import pool
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from octavia.api.v1.types import listener as listener_types
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from octavia.common import constants
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from octavia.common import data_models
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from octavia.common import exceptions
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from octavia.db import api as db_api
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from octavia.db import prepare as db_prepare
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from octavia.i18n import _LI
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LOG = logging.getLogger(__name__)
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class ListenersController(base.BaseController):
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def __init__(self, load_balancer_id):
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super(ListenersController, self).__init__()
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self.load_balancer_id = load_balancer_id
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self.handler = self.handler.listener
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@staticmethod
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def _secure_data(listener):
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# TODO(blogan): Handle this data when certificate management code is
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# available
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listener.tls_termination = wtypes.Unset
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@wsme_pecan.wsexpose(listener_types.ListenerResponse, wtypes.text)
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def get_one(self, id):
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"""Gets a single listener's details."""
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context = pecan.request.context.get('octavia_context')
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db_listener = self.repositories.listener.get(
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context.session, load_balancer_id=self.load_balancer_id, id=id)
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if not db_listener:
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LOG.info(_LI("Listener %s not found."), id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(), id=id)
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return self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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@wsme_pecan.wsexpose([listener_types.ListenerResponse])
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def get_all(self):
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"""Lists all listeners on a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_listeners = self.repositories.listener.get_all(
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context.session, load_balancer_id=self.load_balancer_id)
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return self._convert_db_to_type(db_listeners,
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[listener_types.ListenerResponse])
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def _test_lb_status_post(self, context, lb_repo):
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"""Verify load balancer is in a mutable status for post method."""
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if not lb_repo.test_and_set_provisioning_status(
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context.session, self.load_balancer_id,
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constants.PENDING_UPDATE):
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db_lb = lb_repo.get(context.session, id=self.load_balancer_id)
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LOG.info(_LI("Load Balancer %s is immutable."), db_lb.id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=self.load_balancer_id)
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def _validate_listeners(self, context, lb_repo, listener_dict):
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"""Validate listeners for wrong protocol or duplicate listeners
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Update the load balancer db when provisioning status changes.
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"""
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try:
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sni_containers = listener_dict.pop('sni_containers', [])
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db_listener = self.repositories.listener.create(
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context.session, **listener_dict)
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if sni_containers:
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for sni_container in sni_containers:
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self.repositories.sni.create(
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context.session, **sni_container)
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db_listener = self.repositories.listener.get(
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context.session, id=db_listener.id)
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except odb_exceptions.DBDuplicateEntry as de:
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# Setting LB back to active because this is just a validation
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# failure
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lb_repo.update(context.session, self.load_balancer_id,
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provisioning_status=constants.ACTIVE)
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if ['id'] == de.columns:
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raise exceptions.IDAlreadyExists()
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elif set(['load_balancer_id', 'protocol_port']) == set(de.columns):
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raise exceptions.DuplicateListenerEntry(
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port=listener_dict.get('protocol_port'))
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except odb_exceptions.DBError:
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# Setting LB back to active because this is just a validation
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# failure
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lb_repo.update(context.session, self.load_balancer_id,
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provisioning_status=constants.ACTIVE)
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raise exceptions.InvalidOption(value=listener_dict.get('protocol'),
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option='protocol')
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try:
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LOG.info(_LI("Sending Creation of Listener %s to handler"),
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db_listener.id)
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self.handler.create(db_listener)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, db_listener.id,
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provisioning_status=constants.ERROR)
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db_listener = self.repositories.listener.get(
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context.session, id=db_listener.id)
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return self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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@wsme_pecan.wsexpose(listener_types.ListenerResponse,
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body=listener_types.ListenerPOST, status_code=202)
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def post(self, listener):
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"""Creates a listener on a load balancer."""
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context = pecan.request.context.get('octavia_context')
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self._secure_data(listener)
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lb_repo = self.repositories.load_balancer
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self._test_lb_status_post(context, lb_repo)
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listener_dict = db_prepare.create_listener(
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listener.to_dict(), self.load_balancer_id)
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# This is the extra validation layer for wrong protocol or duplicate
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# listeners on the same load balancer.
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return self._validate_listeners(context, lb_repo, listener_dict)
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def _test_lb_status_put(self, context, id):
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"""Test load balancer status for put method."""
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if not self.repositories.test_and_set_lb_and_listener_prov_status(
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context.session, self.load_balancer_id, id,
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constants.PENDING_UPDATE, constants.PENDING_UPDATE):
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LOG.info(_LI("Load Balancer %s is immutable."),
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self.load_balancer_id)
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lb_repo = self.repositories.load_balancer
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db_lb = lb_repo.get(context.session, id=self.load_balancer_id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=self.load_balancer_id)
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@wsme_pecan.wsexpose(listener_types.ListenerResponse, wtypes.text,
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body=listener_types.ListenerPUT, status_code=202)
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def put(self, id, listener):
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"""Updates a listener on a load balancer."""
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self._secure_data(listener)
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context = pecan.request.context.get('octavia_context')
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db_listener = self.repositories.listener.get(context.session, id=id)
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if not db_listener:
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LOG.info(_LI("Listener %s not found."), id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(), id=id)
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# Verify load balancer is in a mutable status. If so it can be assumed
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# that the listener is also in a mutable status because a load balancer
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# will only be ACTIVE when all it's listeners as ACTIVE.
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self._test_lb_status_put(context, id)
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try:
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LOG.info(_LI("Sending Update of Listener %s to handler"), id)
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self.handler.update(db_listener, listener)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, id, provisioning_status=constants.ERROR)
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db_listener = self.repositories.listener.get(context.session, id=id)
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return self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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@wsme_pecan.wsexpose(None, wtypes.text, status_code=202)
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def delete(self, id):
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"""Deletes a listener from a load balancer."""
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context = pecan.request.context.get('octavia_context')
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db_listener = self.repositories.listener.get(context.session, id=id)
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if not db_listener:
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LOG.info(_LI("Listener %s not found."), id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(), id=id)
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# Verify load balancer is in a mutable status. If so it can be assumed
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# that the listener is also in a mutable status because a load balancer
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# will only be ACTIVE when all it's listeners as ACTIVE.
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if not self.repositories.test_and_set_lb_and_listener_prov_status(
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context.session, self.load_balancer_id, id,
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constants.PENDING_UPDATE, constants.PENDING_DELETE):
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lb_repo = self.repositories.load_balancer
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db_lb = lb_repo.get(context.session, id=self.load_balancer_id)
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raise exceptions.ImmutableObject(resource=db_lb._name(),
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id=self.load_balancer_id)
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db_listener = self.repositories.listener.get(context.session, id=id)
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try:
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LOG.info(_LI("Sending Deletion of Listener %s to handler"),
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db_listener.id)
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self.handler.delete(db_listener)
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except Exception:
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with excutils.save_and_reraise_exception(reraise=False):
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self.repositories.listener.update(
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context.session, db_listener.id,
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provisioning_status=constants.ERROR)
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db_listener = self.repositories.listener.get(
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context.session, id=db_listener.id)
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return self._convert_db_to_type(db_listener,
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listener_types.ListenerResponse)
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@pecan.expose()
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def _lookup(self, listener_id, *remainder):
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"""Overriden pecan _lookup method for custom routing.
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Verifies that the listener passed in the url exists, and if so decides
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which controller, if any, should control be passed.
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"""
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session = db_api.get_session()
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if listener_id and len(remainder) and remainder[0] == 'pools':
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remainder = remainder[1:]
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db_listener = self.repositories.listener.get(
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session, id=listener_id)
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if not db_listener:
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LOG.info(_LI("Listener %s not found."), listener_id)
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raise exceptions.NotFound(
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resource=data_models.Listener._name(), id=listener_id)
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return pool.PoolsController(load_balancer_id=self.load_balancer_id,
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listener_id=db_listener.id), remainder
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