# -*- coding: utf-8 -*-
###########################################################################
# Copyright (c), The AiiDA team. All rights reserved. #
# This file is part of the AiiDA code. #
# #
# The code is hosted on GitHub at https://github.com/aiidateam/aiida-core #
# For further information on the license, see the LICENSE.txt file #
# For further information please visit http://www.aiida.net #
###########################################################################
"""SqlAlchemy implementations for the `Computer` entity and collection."""
from copy import copy
# pylint: disable=import-error,no-name-in-module
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy.orm.session import make_transient
from aiida.backends.sqlalchemy import get_scoped_session
from aiida.backends.sqlalchemy.models.computer import DbComputer
from aiida.common import exceptions
from aiida.orm.implementation.computers import BackendComputerCollection, BackendComputer
from . import utils
from . import entities
[docs]class SqlaComputer(entities.SqlaModelEntity[DbComputer], BackendComputer):
"""SqlAlchemy implementation for `BackendComputer`."""
# pylint: disable=too-many-public-methods
MODEL_CLASS = DbComputer
[docs] def __init__(self, backend, **kwargs):
super().__init__(backend)
self._dbmodel = utils.ModelWrapper(DbComputer(**kwargs))
@property
def uuid(self):
return str(self._dbmodel.uuid)
@property
def pk(self):
return self._dbmodel.id
@property
def id(self): # pylint: disable=invalid-name
return self._dbmodel.id
@property
def is_stored(self):
return self._dbmodel.id is not None
[docs] def copy(self):
"""Create an unstored clone of an already stored `Computer`."""
session = get_scoped_session()
if not self.is_stored:
raise exceptions.InvalidOperation('You can copy a computer only after having stored it')
dbcomputer = copy(self._dbmodel)
make_transient(dbcomputer)
session.add(dbcomputer)
newobject = self.__class__.from_dbmodel(dbcomputer) # pylint: disable=no-value-for-parameter
return newobject
[docs] def store(self):
"""Store the `Computer` instance."""
try:
self._dbmodel.save()
except SQLAlchemyError:
raise ValueError('Integrity error, probably the hostname already exists in the DB')
return self
@property
def name(self):
return self._dbmodel.name
@property
def description(self):
return self._dbmodel.description
@property
def hostname(self):
return self._dbmodel.hostname
[docs] def get_name(self):
return self._dbmodel.name
[docs] def set_name(self, val):
self._dbmodel.name = val
[docs] def get_hostname(self):
return self._dbmodel.hostname
[docs] def set_hostname(self, val):
self._dbmodel.hostname = val
[docs] def get_description(self):
return self._dbmodel.description
[docs] def set_description(self, val):
self._dbmodel.description = val
[docs] def get_scheduler_type(self):
return self._dbmodel.scheduler_type
[docs] def set_scheduler_type(self, scheduler_type):
self._dbmodel.scheduler_type = scheduler_type
[docs] def get_transport_type(self):
return self._dbmodel.transport_type
[docs] def set_transport_type(self, transport_type):
self._dbmodel.transport_type = transport_type
[docs]class SqlaComputerCollection(BackendComputerCollection):
"""Collection of `Computer` instances."""
ENTITY_CLASS = SqlaComputer
[docs] @staticmethod
def list_names():
session = get_scoped_session()
return session.query(DbComputer.name).all()
[docs] def delete(self, pk):
try:
session = get_scoped_session()
session.query(DbComputer).get(pk).delete()
session.commit()
except SQLAlchemyError as exc:
raise exceptions.InvalidOperation(
'Unable to delete the requested computer: it is possible that there '
'is at least one node using this computer (original message: {})'.format(exc)
)