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diff --git a/src/python/grpcio/grpc/framework/crust/_service.py b/src/python/grpcio/grpc/framework/crust/_service.py
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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.
-
-"""Behaviors for servicing RPCs."""
-
-from grpc.framework.crust import _control
-from grpc.framework.foundation import abandonment
-from grpc.framework.interfaces.base import utilities
-from grpc.framework.interfaces.face import face
-
-
-class _ServicerContext(face.ServicerContext):
-
- def __init__(self, rendezvous):
- self._rendezvous = rendezvous
-
- def is_active(self):
- return self._rendezvous.is_active()
-
- def time_remaining(self):
- return self._rendezvous.time_remaining()
-
- def add_abortion_callback(self, abortion_callback):
- return self._rendezvous.add_abortion_callback(abortion_callback)
-
- def cancel(self):
- self._rendezvous.cancel()
-
- def protocol_context(self):
- return self._rendezvous.protocol_context()
-
- def invocation_metadata(self):
- return self._rendezvous.initial_metadata()
-
- def initial_metadata(self, initial_metadata):
- self._rendezvous.set_initial_metadata(initial_metadata)
-
- def terminal_metadata(self, terminal_metadata):
- self._rendezvous.set_terminal_metadata(terminal_metadata)
-
- def code(self, code):
- self._rendezvous.set_code(code)
-
- def details(self, details):
- self._rendezvous.set_details(details)
-
-
-def _adaptation(pool, in_pool):
- def adaptation(operator, operation_context):
- rendezvous = _control.Rendezvous(operator, operation_context)
- subscription = utilities.full_subscription(
- rendezvous, _control.protocol_receiver(rendezvous))
- outcome = operation_context.add_termination_callback(rendezvous.set_outcome)
- if outcome is None:
- pool.submit(_control.pool_wrap(in_pool, operation_context), rendezvous)
- return subscription
- else:
- raise abandonment.Abandoned()
- return adaptation
-
-
-def adapt_inline_unary_unary(method, pool):
- def in_pool(rendezvous):
- request = next(rendezvous)
- response = method(request, _ServicerContext(rendezvous))
- rendezvous.consume_and_terminate(response)
- return _adaptation(pool, in_pool)
-
-
-def adapt_inline_unary_stream(method, pool):
- def in_pool(rendezvous):
- request = next(rendezvous)
- response_iterator = method(request, _ServicerContext(rendezvous))
- for response in response_iterator:
- rendezvous.consume(response)
- rendezvous.terminate()
- return _adaptation(pool, in_pool)
-
-
-def adapt_inline_stream_unary(method, pool):
- def in_pool(rendezvous):
- response = method(rendezvous, _ServicerContext(rendezvous))
- rendezvous.consume_and_terminate(response)
- return _adaptation(pool, in_pool)
-
-
-def adapt_inline_stream_stream(method, pool):
- def in_pool(rendezvous):
- response_iterator = method(rendezvous, _ServicerContext(rendezvous))
- for response in response_iterator:
- rendezvous.consume(response)
- rendezvous.terminate()
- return _adaptation(pool, in_pool)
-
-
-def adapt_event_unary_unary(method, pool):
- def in_pool(rendezvous):
- request = next(rendezvous)
- method(
- request, rendezvous.consume_and_terminate, _ServicerContext(rendezvous))
- return _adaptation(pool, in_pool)
-
-
-def adapt_event_unary_stream(method, pool):
- def in_pool(rendezvous):
- request = next(rendezvous)
- method(request, rendezvous, _ServicerContext(rendezvous))
- return _adaptation(pool, in_pool)
-
-
-def adapt_event_stream_unary(method, pool):
- def in_pool(rendezvous):
- request_consumer = method(
- rendezvous.consume_and_terminate, _ServicerContext(rendezvous))
- for request in rendezvous:
- request_consumer.consume(request)
- request_consumer.terminate()
- return _adaptation(pool, in_pool)
-
-
-def adapt_event_stream_stream(method, pool):
- def in_pool(rendezvous):
- request_consumer = method(rendezvous, _ServicerContext(rendezvous))
- for request in rendezvous:
- request_consumer.consume(request)
- request_consumer.terminate()
- return _adaptation(pool, in_pool)
-
-
-def adapt_multi_method(multi_method, pool):
- def adaptation(group, method, operator, operation_context):
- rendezvous = _control.Rendezvous(operator, operation_context)
- subscription = utilities.full_subscription(
- rendezvous, _control.protocol_receiver(rendezvous))
- outcome = operation_context.add_termination_callback(rendezvous.set_outcome)
- if outcome is None:
- def in_pool():
- request_consumer = multi_method.service(
- group, method, rendezvous, _ServicerContext(rendezvous))
- for request in rendezvous:
- request_consumer.consume(request)
- request_consumer.terminate()
- pool.submit(_control.pool_wrap(in_pool, operation_context), rendezvous)
- return subscription
- else:
- raise abandonment.Abandoned()
- return adaptation