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# Copyright (C) 2010 Leonard Thomas
#
# This file is part of Dodai.
#
# Dodai is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Dodai is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Dodai. If not, see <http://www.gnu.org/licenses/>.
from dodai.config.db import BaseConfigDb
from dodai.db import Db
class Sa(BaseConfigDb):
def load(self, obj):
from sqlalchemy.orm import sessionmaker
self._clean(obj)
db = Db()
db.engine = self._build_engine(obj)
Session = sessionmaker(bind=db.engine)
db.session = Session()
db.name = obj.name
db.protocol = obj.protocol
if hasattr(obj, 'filename') and obj.filename:
db.filename = obj.filename
else:
db.hostname = obj.hostname
if hasattr(obj, 'port') and obj.port:
db.port = obj.port
db.database = obj.database
return db
def _build_connection_string(self, obj):
out = []
out.append('{db.protocol}')
if hasattr(obj, 'protocol_extra') and obj.protocol_extra:
out.append('+{db.protocol_extra}')
out.append('://')
if hasattr(obj, 'filename') and obj.filename:
out.append('{db.filename}')
else:
out.append('{db.username}:{db.password}@')
out.append('{db.hostname}')
if hasattr(obj, 'port') and obj.port:
out.append(':{db.port}')
out.append('/{db.database}')
out = ''.join(out)
out = out.format(db=obj)
return out
def _build_engine(self, obj):
from sqlalchemy import create_engine
connection_string = self._build_connection_string(obj)
db_obj = create_engine(connection_string)
return db_obj
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