# Copyright 2015 Canonical Ltd.
# This file is part of cloud-init. See LICENCE file for license information.
#
# vi: ts=4 expandtab
import abc
import six
from cloudinit import logging
LOG = logging.getLogger(__name__)
@six.add_metaclass(abc.ABCMeta)
class BaseSearchStrategy(object):
"""Declare search strategies for data sources
A *search strategy* represents a decoupled way of choosing
one or more data sources from a list of data sources.
Each strategy can be used interchangeably and they can
be composed. For instance, once can apply a filtering strategy
over a parallel search strategy, which looks for the available
data sources.
"""
@abc.abstractmethod
def search_data_sources(self, data_sources):
"""Search the possible data sources for this strategy
# Copyright 2015 Canonical Ltd.
# This file is part of cloud-init. See LICENCE file for license information.
#
# vi: ts=4 expandtab
import abc
import six
from cloudinit import logging
LOG = logging.getLogger(__name__)
@six.add_metaclass(abc.ABCMeta)
class BaseSearchStrategy(object):
"""Declare search strategies for data sources
A *search strategy* represents a decoupled way of choosing
one or more data sources from a list of data sources.
Each strategy can be used interchangeably and they can
be composed. For instance, once can apply a filtering strategy
over a parallel search strategy, which looks for the available
data sources.
"""
@abc.abstractmethod
def search_data_sources(self, data_sources):
"""Search the possible data sources for this strategy