<gh_stars>10-100
# The MIT License (MIT)
#
# Copyright (c) 2014 <NAME>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell 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
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
"""
Memcache backend.
"""
import memcache

from flagon import errors
from flagon.backends import Backend


class MemcachedBackend(Backend):
    """Memcache Backend for flagon"""

    def __init__(self, hostname="127.0.0.1", port="11211"):
        """
        Creates an instance of the MemcacheBackend.
        """
        self.hostname = "%s:%s" % (hostname, port)
        self.server = memcache.Client([self.hostname])

    def exists(self, name):
        """
        Checks if a feature exists.

        :param name: name of the feature.
        :rtype: bool
        """
        if self.server.get(name) is None:
            return False
        else:
            return True

    def is_active(self, name):
        """
        Checks if a feature is on.

        :param name: name of the feature.
        :rtype: bool
        :raises: UnknownFeatureError
        """
        if not self.exists(name):
            raise errors.UnknownFeatureError('Unknown feature: %s' % name)
        if self.server.get(name)['active']:
            return True
        return False

    def _turn(self, name, value):
        """
        Turns a feature off.

        :param name: name of the feature.
        :param value: Value to turn name to.
        :raises: UnknownFeatureError
        """
        if not self.exists(name):
            raise errors.UnknownFeatureError('Unknown feature: %s' % name)
        self.server.set(name, {'active': bool(value)})

    turn_on = lambda s, name: s._turn(name, True)
    turn_off = lambda s, name: s._turn(name, False)

# The MIT License (MIT)
#
# Copyright (c) 2014 <NAME>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell 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
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
"""
Memcache backend.
"""
import memcache

from flagon import errors
from flagon.backends import Backend


class MemcachedBackend(Backend):
    """Memcache Backend for flagon"""

    def __init__(self, hostname="127.0.0.1", port="11211"):
        """
        Creates an instance of the MemcacheBackend.
        """
        self.hostname = "%s:%s" % (hostname, port)
        self.server = memcache.Client([self.hostname])

    def exists(self, name):
        """
        Checks if a feature exists.

        :param name: name of the feature.
        :rtype: bool
        """
        if self.server.get(name) is None:
            return False
        else:
            return True

    def is_active(self, name):
        """
        Checks if a feature is on.

        :param name: name of the feature.
        :rtype: bool
        :raises: UnknownFeatureError
        """
        if not self.exists(name):
            raise errors.UnknownFeatureError('Unknown feature: %s' % name)
        if self.server.get(name)['active']:
            return True
        return False

    def _turn(self, name, value):
        """
        Turns a feature off.

        :param name: name of the feature.
        :param value: Value to turn name to.
        :raises: UnknownFeatureError
        """
        if not self.exists(name):
            raise errors.UnknownFeatureError('Unknown feature: %s' % name)
        self.server.set(name, {'active': bool(value)})

    turn_on = lambda s, name: s._turn(name, True)
    turn_off = lambda s, name: s._turn(name, False)
# The MIT License (MIT) # # Copyright (c) 2014 <NAME> # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell 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 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS # IN THE SOFTWARE. Memcache backend. Memcache Backend for flagon Creates an instance of the MemcacheBackend. Checks if a feature exists.          :param name: name of the feature.         :rtype: bool Checks if a feature is on.          :param name: name of the feature.         :rtype: bool         :raises: UnknownFeatureError Turns a feature off.          :param name: name of the feature.         :param value: Value to turn name to.         :raises: UnknownFeatureError