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# Copyright 2014 Intel Corp.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Resource object."""
import collections
from oslo_config import cfg
from oslo_versionedobjects import base
from oslo_versionedobjects import fields
import six
import tenacity
from heat.common import crypt
from heat.common import exception
from heat.common.i18n import _
from heat.db import api as db_api
from heat.objects import base as heat_base
from heat.objects import fields as heat_fields
from heat.objects import resource_data
cfg.CONF.import_opt('encrypt_parameters_and_properties', 'heat.common.config')
def retry_on_conflict(func):
wrapper = tenacity.retry(
stop=tenacity.stop_after_attempt(11),
wait=tenacity.wait_random(max=0.002),
retry=tenacity.retry_if_exception_type(
exception.ConcurrentTransaction),
reraise=True)
return wrapper(func)
class ResourceCache(object):
def __init__(self):
self.delete_all()
def delete_all(self):
self.by_stack_id_name = collections.defaultdict(dict)
def set_by_stack_id(self, resources):
for res in six.itervalues(resources):
self.by_stack_id_name[res.stack_id][res.name] = res
class Resource(
heat_base.HeatObject,
base.VersionedObjectDictCompat,
base.ComparableVersionedObject,
):
fields = {
'id': fields.IntegerField(),
'uuid': fields.StringField(),
'stack_id': fields.StringField(),
'created_at': fields.DateTimeField(read_only=True),
'updated_at': fields.DateTimeField(nullable=True),
'physical_resource_id': fields.StringField(nullable=True),
'name': fields.StringField(nullable=True),
'status': fields.StringField(nullable=True),
'status_reason': fields.StringField(nullable=True),
'action': fields.StringField(nullable=True),
'rsrc_metadata': heat_fields.JsonField(nullable=True),
'properties_data': heat_fields.JsonField(nullable=True),
'properties_data_encrypted': fields.BooleanField(default=False),
'data': fields.ListOfObjectsField(
resource_data.ResourceData,
nullable=True
),
'engine_id': fields.StringField(nullable=True),
'atomic_key': fields.IntegerField(nullable=True),
'current_template_id': fields.IntegerField(),
'needed_by': heat_fields.ListField(nullable=True, default=None),
'requires': heat_fields.ListField(nullable=True, default=None),
'replaces': fields.IntegerField(nullable=True),
'replaced_by': fields.IntegerField(nullable=True),
'root_stack_id': fields.StringField(nullable=True),
}
@staticmethod
def _from_db_object(resource, context, db_resource):
if db_resource is None:
return None
for field in resource.fields:
if field == 'data':
resource['data'] = [resource_data.ResourceData._from_db_object(
resource_data.ResourceData(context), resd
) for resd in db_resource.data]
else:
resource[field] = db_resource[field]
if resource.properties_data_encrypted and resource.properties_data:
decrypted_data = crypt.decrypted_dict(resource.properties_data)
resource.properties_data = decrypted_data
resource._context = context
resource.obj_reset_changes()
return resource
@classmethod
def get_obj(cls, context, resource_id, refresh=False):
resource_db = db_api.resource_get(context, resource_id,
refresh=refresh)
return cls._from_db_object(cls(context), context, resource_db)
@classmethod
def get_all(cls, context):
resources_db = db_api.resource_get_all(context)
resources = [
(
resource_name,
cls._from_db_object(cls(context), context, resource_db)
)
for resource_name, resource_db in six.iteritems(resources_db)
]
return dict(resources)
@classmethod
def create(cls, context, values):
return cls._from_db_object(cls(context), context,
db_api.resource_create(context, values))
@classmethod
def delete(cls, context, resource_id):
db_api.resource_delete(context, resource_id)
@classmethod
def exchange_stacks(cls, context, resource_id1, resource_id2):
return db_api.resource_exchange_stacks(
context,
resource_id1,
resource_id2)
@classmethod
def get_all_by_stack(cls, context, stack_id, filters=None):
cache = context.cache(ResourceCache)
resources = cache.by_stack_id_name.get(stack_id)
if resources:
return dict(resources)
resources_db = db_api.resource_get_all_by_stack(context, stack_id,
filters)
return cls._resources_to_dict(context, resources_db)
@classmethod
def _resources_to_dict(cls, context, resources_db):
resources = [
(
resource_name,
cls._from_db_object(cls(context), context, resource_db)
)
for resource_name, resource_db in six.iteritems(resources_db)
]
return dict(resources)
@classmethod
def get_all_active_by_stack(cls, context, stack_id):
resources_db = db_api.resource_get_all_active_by_stack(context,
stack_id)
resources = [
(
resource_id,
cls._from_db_object(cls(context), context, resource_db)
)
for resource_id, resource_db in six.iteritems(resources_db)
]
return dict(resources)
@classmethod
def get_all_by_root_stack(cls, context, stack_id, filters, cache=False):
resources_db = db_api.resource_get_all_by_root_stack(
context,
stack_id,
filters)
all = cls._resources_to_dict(context, resources_db)
if cache:
context.cache(ResourceCache).set_by_stack_id(all)
return all
@classmethod
def purge_deleted(cls, context, stack_id):
return db_api.resource_purge_deleted(context, stack_id)
@classmethod
def get_by_name_and_stack(cls, context, resource_name, stack_id):
resource_db = db_api.resource_get_by_name_and_stack(
context,
resource_name,
stack_id)
return cls._from_db_object(cls(context), context, resource_db)
@classmethod
def get_by_physical_resource_id(cls, context, physical_resource_id):
resource_db = db_api.resource_get_by_physical_resource_id(
context,
physical_resource_id)
return cls._from_db_object(cls(context), context, resource_db)
@classmethod
def update_by_id(cls, context, resource_id, values):
db_api.resource_update_and_save(context, resource_id, values)
def update_and_save(self, values):
db_api.resource_update_and_save(self._context, self.id, values)
def select_and_update(self, values, expected_engine_id=None,
atomic_key=0):
return db_api.resource_update(self._context, self.id, values,
atomic_key=atomic_key,
expected_engine_id=expected_engine_id)
def refresh(self):
resource_db = db_api.resource_get(self._context, self.id, refresh=True)
return self.__class__._from_db_object(
self,
self._context,
resource_db)
@staticmethod
def encrypt_properties_data(data):
if cfg.CONF.encrypt_parameters_and_properties and data:
result = crypt.encrypted_dict(data)
return (True, result)
return (False, data)
def update_metadata(self, metadata):
if self.rsrc_metadata != metadata:
rows_updated = self.select_and_update(
{'rsrc_metadata': metadata}, self.engine_id, self.atomic_key)
if not rows_updated:
action = _('metadata setting for resource %s') % self.name
raise exception.ConcurrentTransaction(action=action)
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