bad27d3886
This adds a limit to the number of resources that ResourceChain creates in parallel. It reduces memory usage drastically when ResourceChain contains lots of resources. We use the number of active services, which seems to give a reasonable balance between performance and memory consumption. Story: #2003975 Task: #26917 Change-Id: Id20fb89813b32927298b3a7c0abe23da710b04d1
100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
#
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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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"""Service object."""
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from oslo_versionedobjects import base
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from oslo_versionedobjects import fields
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from heat.common import service_utils
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from heat.db.sqlalchemy import api as db_api
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from heat.objects import base as heat_base
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class Service(
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heat_base.HeatObject,
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base.VersionedObjectDictCompat,
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base.ComparableVersionedObject,
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):
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fields = {
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'id': fields.StringField(),
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'engine_id': fields.StringField(),
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'host': fields.StringField(),
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'hostname': fields.StringField(),
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'binary': fields.StringField(),
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'topic': fields.StringField(),
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'report_interval': fields.IntegerField(),
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'created_at': fields.DateTimeField(read_only=True),
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'updated_at': fields.DateTimeField(nullable=True),
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'deleted_at': fields.DateTimeField(nullable=True)
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}
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@staticmethod
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def _from_db_object(context, service, db_service):
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for field in service.fields:
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service[field] = db_service[field]
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service._context = context
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service.obj_reset_changes()
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return service
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@classmethod
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def _from_db_objects(cls, context, list_obj):
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return [cls._from_db_object(context, cls(context), obj)
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for obj in list_obj]
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@classmethod
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def get_by_id(cls, context, service_id):
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service_db = db_api.service_get(context, service_id)
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service = cls._from_db_object(context, cls(), service_db)
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return service
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@classmethod
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def create(cls, context, values):
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return cls._from_db_object(
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context,
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cls(),
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db_api.service_create(context, values))
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@classmethod
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def update_by_id(cls, context, service_id, values):
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return cls._from_db_object(
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context,
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cls(),
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db_api.service_update(context, service_id, values))
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@classmethod
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def delete(cls, context, service_id, soft_delete=True):
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db_api.service_delete(context, service_id, soft_delete)
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@classmethod
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def get_all(cls, context):
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return cls._from_db_objects(context,
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db_api.service_get_all(context))
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@classmethod
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def get_all_by_args(cls, context, host, binary, hostname):
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return cls._from_db_objects(
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context,
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db_api.service_get_all_by_args(context,
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host,
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binary,
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hostname))
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@classmethod
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def active_service_count(cls, context):
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"""Return the number of services reportedly active."""
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return len([
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svc for svc in cls.get_all(context)
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if service_utils.format_service(svc)['status'] == 'up'])
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