singleton.py

# Copyright (c) 2016 Uber Technologies, Inc.
#
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# THE SOFTWARE.

from __future__ import (
    absolute_import, division, print_function, unicode_literals
)

from threading import local

from tchannel.singleton import TChannel as TChannelSingleton
from .client import TChannel as SyncTChannel


class TChannel(TChannelSingleton):

    tchannel_cls = SyncTChannel

    local = local()
    local.tchannel = None

    prepared = False
    args = None
    kwargs = None

    @classmethod
    def get_instance(cls):
        """Get a configured, thread-safe, singleton TChannel instance.

        :returns: tchannel.sync.TChannel
        """
        return super(TChannel, cls).get_instance()