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# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Utilities for creating Base-layer objects for use in Face-layer tests."""
import abc
import six
# interfaces is referenced from specification in this module.
from grpc.framework.base import util as _base_util
from grpc.framework.base import implementations
from grpc.framework.base import in_memory
from grpc.framework.base import interfaces # pylint: disable=unused-import
from grpc.framework.foundation import logging_pool
_POOL_SIZE_LIMIT = 5
_MAXIMUM_TIMEOUT = 90
class LinkedPair(six.with_metaclass(abc.ABCMeta)):
"""A Front and Back that are linked to one another.
Attributes:
front: An interfaces.Front.
back: An interfaces.Back.
"""
@abc.abstractmethod
def shut_down(self):
"""Shuts down this object and releases its resources."""
raise NotImplementedError()
class _LinkedPair(LinkedPair):
def __init__(self, front, back, pools):
self.front = front
self.back = back
self._pools = pools
def shut_down(self):
_base_util.wait_for_idle(self.front)
_base_util.wait_for_idle(self.back)
for pool in self._pools:
pool.shutdown(wait=True)
def linked_pair(servicer, default_timeout):
"""Creates a Server and Stub linked together for use."""
link_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
front_work_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
front_transmission_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
front_utility_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
back_work_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
back_transmission_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
back_utility_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
pools = (
link_pool,
front_work_pool, front_transmission_pool, front_utility_pool,
back_work_pool, back_transmission_pool, back_utility_pool)
link = in_memory.Link(link_pool)
front = implementations.front_link(
front_work_pool, front_transmission_pool, front_utility_pool)
back = implementations.back_link(
servicer, back_work_pool, back_transmission_pool, back_utility_pool,
default_timeout, _MAXIMUM_TIMEOUT)
front.join_rear_link(link)
link.join_fore_link(front)
back.join_fore_link(link)
link.join_rear_link(back)
return _LinkedPair(front, back, pools)
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