ec961aaf59
Add atom intentions: REVERT, EXECUTE, RETRY and IGNORE. Intentions will be used by action engine to schedule tasks correctly. Add intention to task detail and extend storage to work with atom intentions. Add alembic migration to add intentions column to database. Change-Id: I79c9bb5f11861658dbfedfd64ef93eb92b29cb2d
121 lines
3.9 KiB
Python
121 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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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, DateTime, Enum
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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 import jsonutils
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from taskflow.openstack.common import timeutils
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from taskflow.openstack.common import uuidutils
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from taskflow.persistence import logbook
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from taskflow import states
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from taskflow.utils import persistence_utils
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BASE = declarative_base()
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# TODO(harlowja): remove when oslo.db exists
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class TimestampMixin(object):
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created_at = Column(DateTime, default=timeutils.utcnow)
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updated_at = Column(DateTime, onupdate=timeutils.utcnow)
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class Json(types.TypeDecorator):
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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 Failure(types.TypeDecorator):
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"""Put misc.Failure object into database column.
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We convert Failure object to dict, serialize that dict into
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JSON and save it. None is stored as NULL.
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The conversion is lossy since we cannot save exc_info.
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"""
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impl = types.Text
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def process_bind_param(self, value, dialect):
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if value is None:
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return None
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return jsonutils.dumps(persistence_utils.failure_to_dict(value))
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def process_result_value(self, value, dialect):
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if value is None:
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return None
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return persistence_utils.failure_from_dict(jsonutils.loads(value))
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class ModelBase(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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atom_type = Column(Enum(*logbook.ATOM_TYPES, name='atom_types'))
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# Member variables
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state = Column(String)
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intention = Column(Enum(*states.INTENTIONS, name='intentions'))
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results = Column(Json)
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failure = Column(Failure)
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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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