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# Copyright (C) 2014 Yahoo! Inc. All Rights Reserved.
#
# 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.
import collections
from oslo_serialization import jsonutils
from oslo_utils import timeutils
from oslo_utils import uuidutils
from sqlalchemy import Table, Column, String, ForeignKey, DateTime, Enum
from sqlalchemy_utils.types import json as json_type
from taskflow.persistence import models
from taskflow import states
Tables = collections.namedtuple('Tables',
['logbooks', 'flowdetails', 'atomdetails'])
# Column length limits...
NAME_LENGTH = 255
UUID_LENGTH = 64
STATE_LENGTH = 255
VERSION_LENGTH = 64
class JSONType(json_type.JSONType):
"""Customized JSONType using oslo.serialization for json operations"""
def process_bind_param(self, value, dialect):
if dialect.name == 'postgresql' and json_type.has_postgres_json:
return value
if value is not None:
value = jsonutils.dumps(value)
return value
def process_result_value(self, value, dialect):
if dialect.name == 'postgresql':
return value
if value is not None:
value = jsonutils.loads(value)
return value
def fetch(metadata):
"""Returns the master set of table objects (which is also there schema)."""
logbooks = Table('logbooks', metadata,
Column('created_at', DateTime,
default=timeutils.utcnow),
Column('updated_at', DateTime,
onupdate=timeutils.utcnow),
Column('meta', JSONType),
Column('name', String(length=NAME_LENGTH)),
Column('uuid', String(length=UUID_LENGTH),
primary_key=True, nullable=False, unique=True,
default=uuidutils.generate_uuid))
flowdetails = Table('flowdetails', metadata,
Column('created_at', DateTime,
default=timeutils.utcnow),
Column('updated_at', DateTime,
onupdate=timeutils.utcnow),
Column('parent_uuid', String(length=UUID_LENGTH),
ForeignKey('logbooks.uuid',
ondelete='CASCADE')),
Column('meta', JSONType),
Column('name', String(length=NAME_LENGTH)),
Column('state', String(length=STATE_LENGTH)),
Column('uuid', String(length=UUID_LENGTH),
primary_key=True, nullable=False, unique=True,
default=uuidutils.generate_uuid))
atomdetails = Table('atomdetails', metadata,
Column('created_at', DateTime,
default=timeutils.utcnow),
Column('updated_at', DateTime,
onupdate=timeutils.utcnow),
Column('meta', JSONType),
Column('parent_uuid', String(length=UUID_LENGTH),
ForeignKey('flowdetails.uuid',
ondelete='CASCADE')),
Column('name', String(length=NAME_LENGTH)),
Column('version', String(length=VERSION_LENGTH)),
Column('state', String(length=STATE_LENGTH)),
Column('uuid', String(length=UUID_LENGTH),
primary_key=True, nullable=False, unique=True,
default=uuidutils.generate_uuid),
Column('failure', JSONType),
Column('results', JSONType),
Column('revert_results', JSONType),
Column('revert_failure', JSONType),
Column('atom_type', Enum(*models.ATOM_TYPES,
name='atom_types')),
Column('intention', Enum(*states.INTENTIONS,
name='intentions')))
return Tables(logbooks, flowdetails, atomdetails)
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