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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.
"""Demonstration-suitable implementation of the face layer of RPC Framework."""
from _framework.base import util as _base_util
from _framework.base.packets import implementations as _tickets_implementations
from _framework.face import implementations
from _framework.foundation import logging_pool
_POOL_SIZE_LIMIT = 20
_MAXIMUM_TIMEOUT = 90
class LinkedPair(object):
"""A Server and Stub that are linked to one another.
Attributes:
server: A Server.
stub: A Stub.
"""
def shut_down(self):
"""Shuts down this object and releases its resources."""
raise NotImplementedError()
class _LinkedPair(LinkedPair):
def __init__(self, server, stub, front, back, pools):
self.server = server
self.stub = stub
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 server_and_stub(
default_timeout,
inline_value_in_value_out_methods=None,
inline_value_in_stream_out_methods=None,
inline_stream_in_value_out_methods=None,
inline_stream_in_stream_out_methods=None,
event_value_in_value_out_methods=None,
event_value_in_stream_out_methods=None,
event_stream_in_value_out_methods=None,
event_stream_in_stream_out_methods=None,
multi_method=None):
"""Creates a Server and Stub linked together for use."""
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)
stub_pool = logging_pool.pool(_POOL_SIZE_LIMIT)
pools = (
front_work_pool, front_transmission_pool, front_utility_pool,
back_work_pool, back_transmission_pool, back_utility_pool,
stub_pool)
servicer = implementations.servicer(
back_work_pool,
inline_value_in_value_out_methods=inline_value_in_value_out_methods,
inline_value_in_stream_out_methods=inline_value_in_stream_out_methods,
inline_stream_in_value_out_methods=inline_stream_in_value_out_methods,
inline_stream_in_stream_out_methods=inline_stream_in_stream_out_methods,
event_value_in_value_out_methods=event_value_in_value_out_methods,
event_value_in_stream_out_methods=event_value_in_stream_out_methods,
event_stream_in_value_out_methods=event_stream_in_value_out_methods,
event_stream_in_stream_out_methods=event_stream_in_stream_out_methods,
multi_method=multi_method)
front = _tickets_implementations.front(
front_work_pool, front_transmission_pool, front_utility_pool)
back = _tickets_implementations.back(
servicer, back_work_pool, back_transmission_pool, back_utility_pool,
default_timeout, _MAXIMUM_TIMEOUT)
front.join_rear_link(back)
back.join_fore_link(front)
stub = implementations.stub(front, stub_pool)
return _LinkedPair(implementations.server(), stub, front, back, pools)
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