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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.
"""Beta API server implementation."""
import threading
from grpc._links import service
from grpc.framework.core import implementations as _core_implementations
from grpc.framework.crust import implementations as _crust_implementations
from grpc.framework.foundation import logging_pool
from grpc.framework.interfaces.links import utilities
_DEFAULT_POOL_SIZE = 8
_DEFAULT_TIMEOUT = 300
_MAXIMUM_TIMEOUT = 24 * 60 * 60
def _disassemble(grpc_link, end_link, pool, event, grace):
grpc_link.begin_stop()
end_link.stop(grace).wait()
grpc_link.end_stop()
grpc_link.join_link(utilities.NULL_LINK)
end_link.join_link(utilities.NULL_LINK)
if pool is not None:
pool.shutdown(wait=True)
event.set()
class Server(object):
def __init__(self, grpc_link, end_link, pool):
self._grpc_link = grpc_link
self._end_link = end_link
self._pool = pool
def add_insecure_port(self, address):
return self._grpc_link.add_port(address, None)
def add_secure_port(self, address, intermediary_low_server_credentials):
return self._grpc_link.add_port(
address, intermediary_low_server_credentials)
def start(self):
self._grpc_link.join_link(self._end_link)
self._end_link.join_link(self._grpc_link)
self._grpc_link.start()
self._end_link.start()
def stop(self, grace):
stop_event = threading.Event()
if 0 < grace:
disassembly_thread = threading.Thread(
target=_disassemble,
args=(
self._grpc_link, self._end_link, self._pool, stop_event, grace,))
disassembly_thread.start()
return stop_event
else:
_disassemble(self._grpc_link, self._end_link, self._pool, stop_event, 0)
return stop_event
def server(
implementations, multi_implementation, request_deserializers,
response_serializers, thread_pool, thread_pool_size, default_timeout,
maximum_timeout):
if thread_pool is None:
service_thread_pool = logging_pool.pool(
_DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size)
assembly_thread_pool = service_thread_pool
else:
service_thread_pool = thread_pool
assembly_thread_pool = None
servicer = _crust_implementations.servicer(
implementations, multi_implementation, service_thread_pool)
grpc_link = service.service_link(request_deserializers, response_serializers)
end_link = _core_implementations.service_end_link(
servicer,
_DEFAULT_TIMEOUT if default_timeout is None else default_timeout,
_MAXIMUM_TIMEOUT if maximum_timeout is None else maximum_timeout)
return Server(grpc_link, end_link, assembly_thread_pool)
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