152 lines
4.4 KiB
Python
152 lines
4.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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 portas data
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"""
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import anyjson
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from sqlalchemy import Column, String, BigInteger, TypeDecorator, ForeignKey
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from sqlalchemy.ext.compiler import compiles
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy import DateTime, Text
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from sqlalchemy.orm import relationship, backref, object_mapper
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from portas.openstack.common import timeutils
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from portas.openstack.common import uuidutils
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from portas.db.session import get_session
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BASE = declarative_base()
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@compiles(BigInteger, 'sqlite')
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def compile_big_int_sqlite(type_, compiler, **kw):
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return 'INTEGER'
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class ModelBase(object):
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__protected_attributes__ = {"created", "updated"}
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created = Column(DateTime, default=timeutils.utcnow,
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nullable=False)
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updated = Column(DateTime, default=timeutils.utcnow,
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nullable=False, onupdate=timeutils.utcnow)
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def save(self, session=None):
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"""Save this object"""
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session = session or get_session()
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session.add(self)
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session.flush()
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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 = timeutils.utcnow()
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self.save(session=session)
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def update(self, values):
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"""dict.update() behaviour."""
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for k, v in values.iteritems():
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self[k] = v
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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 __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 keys(self):
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return self.__dict__.keys()
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def values(self):
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return self.__dict__.values()
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def items(self):
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return self.__dict__.items()
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def to_dict(self):
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dictionary = self.__dict__.copy()
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return {k: v for k, v in dictionary.iteritems() if k != '_sa_instance_state'}
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class JsonBlob(TypeDecorator):
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impl = Text
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def process_bind_param(self, value, dialect):
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return anyjson.serialize(value)
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def process_result_value(self, value, dialect):
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return anyjson.deserialize(value)
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class Environment(BASE, ModelBase):
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"""Represents a Environment in the metadata-store"""
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__tablename__ = 'environment'
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id = Column(String(36), primary_key=True, default=uuidutils.generate_uuid)
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name = Column(String(255))
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tenant_id = Column(String(36))
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description = Column(JsonBlob())
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class Service(BASE, ModelBase):
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"""
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Represents an instance of service.
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:var name: string
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:var type: string - type of service (e.g. Active Directory)
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"""
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__tablename__ = 'service'
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id = Column(String(36), primary_key=True, default=uuidutils.generate_uuid)
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name = Column(String(255), index=True, nullable=False)
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type = Column(String(255), index=True, nullable=False)
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environment_id = Column(String(36), ForeignKey('environment.id'))
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environment = relationship(Environment,
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backref=backref('service', order_by=id),
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uselist=False)
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description = Column(JsonBlob())
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def register_models(engine):
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"""
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Creates database tables for all models with the given engine
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"""
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models = (Environment, Service)
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for model in models:
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model.metadata.create_all(engine)
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def unregister_models(engine):
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"""
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Drops database tables for all models with the given engine
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"""
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models = (Environment, Service)
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for model in models:
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model.metadata.drop_all(engine)
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