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# Copyright (C) 2006-2017 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Base class for pipelines.."""
from mailman.config import config
from mailman.interfaces.pipeline import IPipeline
from mailman.utilities.modules import abstract_component
from public import public
from zope.interface import implementer
@public
@abstract_component
@implementer(IPipeline)
class BasePipeline:
"""Base pipeline implementation."""
_default_handlers = ()
def __init__(self):
self._handlers = []
for handler_name in self._default_handlers:
self._handlers.append(config.handlers[handler_name])
def __iter__(self):
"""See `IPipeline`."""
yield from self._handlers
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