117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
# Copyright (c) 2013 Red Hat, Inc.
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# Copyright 2014 Catalyst IT Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy
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# 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 under
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# the License.
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from oslo_db.sqlalchemy import engines
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from osprofiler import profiler
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from osprofiler import sqlalchemy as sa_tracer
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import sqlalchemy as sa
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from zaqar.common import decorators
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from zaqar.conf import drivers_management_store_sqlalchemy
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from zaqar import storage
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from zaqar.storage.sqlalchemy import controllers
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class ControlDriver(storage.ControlDriverBase):
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def __init__(self, conf, cache):
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super(ControlDriver, self).__init__(conf, cache)
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self.conf.register_opts(
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drivers_management_store_sqlalchemy.ALL_OPTS,
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group=drivers_management_store_sqlalchemy.GROUP_NAME)
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self.sqlalchemy_conf = self.conf[
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drivers_management_store_sqlalchemy.GROUP_NAME]
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def _mysql_on_connect(self, conn, record):
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# NOTE(flaper87): This is necessary in order
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# to ensure that all date operations in mysql
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# happen in UTC, `now()` for example.
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conn.query('SET time_zone = "+0:00"')
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@decorators.lazy_property(write=False)
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def engine(self):
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uri = self.sqlalchemy_conf.uri
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engine = engines.create_engine(uri, sqlite_fk=True)
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if (uri.startswith('mysql://') or
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uri.startswith('mysql+pymysql://')):
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# oslo_db.create_engine makes a test connection, throw that out
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# first. mysql time_zone can be added to oslo_db as a
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# startup option
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engine.dispose()
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sa.event.listen(engine, 'connect',
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self._mysql_on_connect)
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if (self.conf.profiler.enabled and
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self.conf.profiler.trace_message_store):
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sa_tracer.add_tracing(sa, engine, "db")
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return engine
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# TODO(cpp-cabrera): expose connect/close as a context manager
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# that acquires the connection to the DB for the desired scope and
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# closes it once the operations are completed
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# TODO(wangxiyuan): we should migrate to oslo.db asap.
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def run(self, *args, **kwargs):
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return self.engine.execute(*args, **kwargs)
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def close(self):
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pass
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@property
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def pools_controller(self):
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controller = controllers.PoolsController(self)
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if (self.conf.profiler.enabled and
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self.conf.profiler.trace_management_store):
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return profiler.trace_cls("sqlalchemy_pools_"
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"controller")(controller)
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else:
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return controller
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@property
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def queue_controller(self):
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controller = controllers.QueueController(self)
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if (self.conf.profiler.enabled and
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(self.conf.profiler.trace_message_store or
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self.conf.profiler.trace_management_store)):
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return profiler.trace_cls("sqlalchemy_queue_"
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"controller")(controller)
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else:
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return controller
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@property
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def catalogue_controller(self):
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controller = controllers.CatalogueController(self)
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if (self.conf.profiler.enabled and
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self.conf.profiler.trace_management_store):
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return profiler.trace_cls("sqlalchemy_catalogue_"
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"controller")(controller)
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else:
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return controller
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@property
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def flavors_controller(self):
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controller = controllers.FlavorsController(self)
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if (self.conf.profiler.enabled and
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self.conf.profiler.trace_management_store):
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return profiler.trace_cls("sqlalchemy_flavors_"
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"controller")(controller)
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else:
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return controller
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@property
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def topic_controller(self):
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pass
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