| # 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 |
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| # (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.beta import interfaces |
| 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.base import base |
| from grpc.framework.interfaces.links import utilities |
| |
| _DEFAULT_POOL_SIZE = 8 |
| _DEFAULT_TIMEOUT = 300 |
| _MAXIMUM_TIMEOUT = 24 * 60 * 60 |
| |
| |
| class _GRPCServicer(base.Servicer): |
| |
| def __init__(self, delegate): |
| self._delegate = delegate |
| |
| def service(self, group, method, context, output_operator): |
| try: |
| return self._delegate.service(group, method, context, output_operator) |
| except base.NoSuchMethodError as e: |
| if e.code is None and e.details is None: |
| raise base.NoSuchMethodError( |
| interfaces.StatusCode.UNIMPLEMENTED, |
| b'Method "%s" of service "%s" not implemented!' % (method, group)) |
| else: |
| raise |
| |
| |
| 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 = _GRPCServicer( |
| _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) |