160 lines
5.2 KiB
Python
160 lines
5.2 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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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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"""
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SQLAlchemy models for heat data.
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"""
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from sqlalchemy import *
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from sqlalchemy.orm import relationship, backref, object_mapper
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from sqlalchemy.exc import IntegrityError
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.schema import ForeignKeyConstraint
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from sqlalchemy import types as types
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from json import dumps, loads
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from heat.openstack.common import utils
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from heat.db.sqlalchemy.session import get_session
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BASE = declarative_base()
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class Json(types.TypeDecorator, types.MutableType):
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impl=types.Text
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def process_bind_param(self, value, dialect):
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return dumps(value)
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def process_result_value(self, value, dialect):
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return loads(value)
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class HeatBase(object):
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"""Base class for Heat Models."""
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__table_args__ = {'mysql_engine': 'InnoDB'}
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__table_initialized__ = False
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created_at = Column(DateTime, default=utils.utcnow)
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updated_at = Column(DateTime, onupdate=utils.utcnow)
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def save(self, session=None):
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"""Save this object."""
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if not session:
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session = get_session()
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session.add(self)
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try:
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session.flush()
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except IntegrityError, e:
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if str(e).endswith('is not unique'):
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raise exception.Duplicate(str(e))
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else:
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raise
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def delete(self, session=None):
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"""Delete this object."""
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self.deleted = True
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self.deleted_at = utils.utcnow()
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self.save(session=session)
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def __setitem__(self, key, value):
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setattr(self, key, value)
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def __getitem__(self, key):
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return getattr(self, key)
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def get(self, key, default=None):
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return getattr(self, key, default)
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def __iter__(self):
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self._i = iter(object_mapper(self).columns)
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return self
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def next(self):
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n = self._i.next().name
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return n, getattr(self, n)
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def update(self, values):
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"""Make the model object behave like a dict"""
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for k, v in values.iteritems():
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setattr(self, k, v)
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def iteritems(self):
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"""Make the model object behave like a dict.
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Includes attributes from joins."""
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local = dict(self)
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joined = dict([(k, v) for k, v in self.__dict__.iteritems()
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if not k[0] == '_'])
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local.update(joined)
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return local.iteritems()
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class RawTemplate(BASE, HeatBase):
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"""Represents an unparsed template which should be in JSON format."""
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__tablename__ = 'raw_template'
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id = Column(Integer, primary_key=True)
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template = Column(Json)
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parsed_template = relationship("ParsedTemplate",\
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uselist=False, backref="raw_template", cascade="all, delete", passive_deletes=True)
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class ParsedTemplate(BASE, HeatBase):
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"""Represents a parsed template."""
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__tablename__ = 'parsed_template'
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id = Column(Integer, primary_key=True)
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template = Column(Json)
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raw_template_id = Column(Integer, ForeignKey('raw_template.id'),\
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nullable=False)
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class Stack(BASE, HeatBase):
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"""Represents an generated by the heat engine."""
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__tablename__ = 'stack'
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id = Column(Integer, primary_key=True)
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name = Column(String, unique=True)
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raw_template_id = Column(Integer, ForeignKey('raw_template.id'),\
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nullable=False)
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raw_template = relationship(RawTemplate,
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backref=backref('stack'), cascade="all, delete", passive_deletes=True)
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class Event(BASE, HeatBase):
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"""Represents an event generated by the heat engine."""
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__tablename__ = 'event'
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id = Column(Integer, primary_key=True)
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stack_id = Column(Integer, ForeignKey('stack.id'),\
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nullable=False)
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stack = relationship(Stack,
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backref=backref('events'), cascade="all, delete", passive_deletes=True)
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name = Column(String)
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class Resource(BASE, HeatBase):
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"""Represents a resource created by the heat engine."""
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__tablename__ = 'resource'
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id = Column(Integer, primary_key=True)
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state = Column('state', String)
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name = Column('name', String, nullable=False)
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nova_instance = Column('nova_instance', String)
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state_description = Column('state_description', String)
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parsed_template_id = Column(Integer, ForeignKey('parsed_template.id'),\
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nullable=True)
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parsed_template = relationship(ParsedTemplate,
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backref=backref('resources'))
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stack_id = Column(Integer, ForeignKey('stack.id'),\
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nullable=False)
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stack = relationship(Stack, backref=backref('resources'), cascade="all, delete", passive_deletes=True)
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depends_on = Column(Integer)
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