<reponame>bbc/rd-cloudfit-python-aiocypher
#
#
# Copyright 2020-21 British Broadcasting Corporation
#
# 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.
#

from abc import ABCMeta, abstractmethod

from .result import Result


class Transaction (object, metaclass=ABCMeta):
    """A class which encapsulates a Transaction. Should never be created directly,
    but always via a Session object.

    Should always be used as an Async Context Manager. Using any of its methods outside of
    the context may lead to undefined behaviour.
    """
    async def __aenter__(self) -> "Transaction":
        return self

    async def __aexit__(self, *args):
        return False

    @abstractmethod
    def run(self, *args, **kwargs) -> Result:
        """This is the main routine for this class.

        The actual query will not be executed until such a time as the return value (or some derivative thereof)
        is awaited.

        :returns: an Result object
        """
        ...

#
#
# Copyright 2020-21 British Broadcasting Corporation
#
# 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.
#

from abc import ABCMeta, abstractmethod

from .result import Result


class Transaction (object, metaclass=ABCMeta):
    """A class which encapsulates a Transaction. Should never be created directly,
    but always via a Session object.

    Should always be used as an Async Context Manager. Using any of its methods outside of
    the context may lead to undefined behaviour.
    """
    async def __aenter__(self) -> "Transaction":
        return self

    async def __aexit__(self, *args):
        return False

    @abstractmethod
    def run(self, *args, **kwargs) -> Result:
        """This is the main routine for this class.

        The actual query will not be executed until such a time as the return value (or some derivative thereof)
        is awaited.

        :returns: an Result object
        """
        ...
# # # Copyright 2020-21 British Broadcasting Corporation # # 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. # A class which encapsulates a Transaction. Should never be created directly,     but always via a Session object.      Should always be used as an Async Context Manager. Using any of its methods outside of     the context may lead to undefined behaviour. This is the main routine for this class.          The actual query will not be executed until such a time as the return value (or some derivative thereof)         is awaited.          :returns: an Result object