dc56ff482a
1. Simplify the exposed api to reduce race conditions which could occur if we allowed flow details, task details and log books to be deleted at different times; reduce this down to just being able to save and delete from logbooks (and only save/update for flow and task details to) to reduce the problem cases. 2. Introduce a alembic migration with a proper schema so that the initial database can be created in the first place, adjust its exposed fields and relations to be defined by said schema. 3. Use oslo db models instead of our own. Change-Id: I78bbedf87d506d3f39157198638937c933235b7b
92 lines
3.0 KiB
Python
92 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
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# Copyright (C) 2013 Rackspace Hosting Inc. 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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from sqlalchemy import Column, String
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy import ForeignKey
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from sqlalchemy.orm import backref
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from sqlalchemy.orm import relationship
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from sqlalchemy import types as types
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from taskflow.openstack.common.db.sqlalchemy import models as c_models
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from taskflow.openstack.common import jsonutils
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from taskflow.openstack.common import uuidutils
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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 jsonutils.dumps(value)
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def process_result_value(self, value, dialect):
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return jsonutils.loads(value)
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class ModelBase(c_models.ModelBase,
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c_models.TimestampMixin):
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"""Base model for all taskflow objects"""
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uuid = Column(String, default=uuidutils.generate_uuid,
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primary_key=True, nullable=False, unique=True)
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name = Column(String, nullable=True)
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meta = Column(Json, nullable=True)
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class LogBook(BASE, ModelBase):
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"""Represents a logbook for a set of flows"""
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__tablename__ = 'logbooks'
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# Relationships
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flowdetails = relationship("FlowDetail",
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single_parent=True,
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backref=backref("logbooks",
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cascade="save-update, delete, "
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"merge"))
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class FlowDetail(BASE, ModelBase):
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__tablename__ = 'flowdetails'
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# Member variables
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state = Column(String)
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# Relationships
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parent_uuid = Column(String, ForeignKey('logbooks.uuid'))
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taskdetails = relationship("TaskDetail",
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single_parent=True,
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backref=backref("flowdetails",
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cascade="save-update, delete, "
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"merge"))
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class TaskDetail(BASE, ModelBase):
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__tablename__ = 'taskdetails'
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# Member variables
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state = Column(String)
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results = Column(Json)
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exception = Column(Json)
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stacktrace = Column(Json)
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version = Column(String)
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# Relationships
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parent_uuid = Column(String, ForeignKey('flowdetails.uuid'))
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