add ydb deps

1 files changed, 385 insertions, 0 deletions

diff --git a/contrib/python/grpcio/py3/grpc/beta/_server_adaptations.py b/contrib/python/grpcio/py3/grpc/beta/_server_adaptations.py
new file mode 100644
index 00000000000..8843a3c5502
--- /dev/null
+++ b/contrib/python/grpcio/py3/grpc/beta/_server_adaptations.py
@@ -0,0 +1,385 @@
+# Copyright 2016 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Translates gRPC's server-side API into gRPC's server-side Beta API."""
+
+import collections
+import threading
+
+import grpc
+from grpc import _common
+from grpc.beta import _metadata
+from grpc.beta import interfaces
+from grpc.framework.common import cardinality
+from grpc.framework.common import style
+from grpc.framework.foundation import abandonment
+from grpc.framework.foundation import logging_pool
+from grpc.framework.foundation import stream
+from grpc.framework.interfaces.face import face
+
+# pylint: disable=too-many-return-statements
+
+_DEFAULT_POOL_SIZE = 8
+
+
+class _ServerProtocolContext(interfaces.GRPCServicerContext):
+
+    def __init__(self, servicer_context):
+        self._servicer_context = servicer_context
+
+    def peer(self):
+        return self._servicer_context.peer()
+
+    def disable_next_response_compression(self):
+        pass  # TODO(https://github.com/grpc/grpc/issues/4078): design, implement.
+
+
+class _FaceServicerContext(face.ServicerContext):
+
+    def __init__(self, servicer_context):
+        self._servicer_context = servicer_context
+
+    def is_active(self):
+        return self._servicer_context.is_active()
+
+    def time_remaining(self):
+        return self._servicer_context.time_remaining()
+
+    def add_abortion_callback(self, abortion_callback):
+        raise NotImplementedError(
+            'add_abortion_callback no longer supported server-side!')
+
+    def cancel(self):
+        self._servicer_context.cancel()
+
+    def protocol_context(self):
+        return _ServerProtocolContext(self._servicer_context)
+
+    def invocation_metadata(self):
+        return _metadata.beta(self._servicer_context.invocation_metadata())
+
+    def initial_metadata(self, initial_metadata):
+        self._servicer_context.send_initial_metadata(
+            _metadata.unbeta(initial_metadata))
+
+    def terminal_metadata(self, terminal_metadata):
+        self._servicer_context.set_terminal_metadata(
+            _metadata.unbeta(terminal_metadata))
+
+    def code(self, code):
+        self._servicer_context.set_code(code)
+
+    def details(self, details):
+        self._servicer_context.set_details(details)
+
+
+def _adapt_unary_request_inline(unary_request_inline):
+
+    def adaptation(request, servicer_context):
+        return unary_request_inline(request,
+                                    _FaceServicerContext(servicer_context))
+
+    return adaptation
+
+
+def _adapt_stream_request_inline(stream_request_inline):
+
+    def adaptation(request_iterator, servicer_context):
+        return stream_request_inline(request_iterator,
+                                     _FaceServicerContext(servicer_context))
+
+    return adaptation
+
+
+class _Callback(stream.Consumer):
+
+    def __init__(self):
+        self._condition = threading.Condition()
+        self._values = []
+        self._terminated = False
+        self._cancelled = False
+
+    def consume(self, value):
+        with self._condition:
+            self._values.append(value)
+            self._condition.notify_all()
+
+    def terminate(self):
+        with self._condition:
+            self._terminated = True
+            self._condition.notify_all()
+
+    def consume_and_terminate(self, value):
+        with self._condition:
+            self._values.append(value)
+            self._terminated = True
+            self._condition.notify_all()
+
+    def cancel(self):
+        with self._condition:
+            self._cancelled = True
+            self._condition.notify_all()
+
+    def draw_one_value(self):
+        with self._condition:
+            while True:
+                if self._cancelled:
+                    raise abandonment.Abandoned()
+                elif self._values:
+                    return self._values.pop(0)
+                elif self._terminated:
+                    return None
+                else:
+                    self._condition.wait()
+
+    def draw_all_values(self):
+        with self._condition:
+            while True:
+                if self._cancelled:
+                    raise abandonment.Abandoned()
+                elif self._terminated:
+                    all_values = tuple(self._values)
+                    self._values = None
+                    return all_values
+                else:
+                    self._condition.wait()
+
+
+def _run_request_pipe_thread(request_iterator, request_consumer,
+                             servicer_context):
+    thread_joined = threading.Event()
+
+    def pipe_requests():
+        for request in request_iterator:
+            if not servicer_context.is_active() or thread_joined.is_set():
+                return
+            request_consumer.consume(request)
+            if not servicer_context.is_active() or thread_joined.is_set():
+                return
+        request_consumer.terminate()
+
+    request_pipe_thread = threading.Thread(target=pipe_requests)
+    request_pipe_thread.daemon = True
+    request_pipe_thread.start()
+
+
+def _adapt_unary_unary_event(unary_unary_event):
+
+    def adaptation(request, servicer_context):
+        callback = _Callback()
+        if not servicer_context.add_callback(callback.cancel):
+            raise abandonment.Abandoned()
+        unary_unary_event(request, callback.consume_and_terminate,
+                          _FaceServicerContext(servicer_context))
+        return callback.draw_all_values()[0]
+
+    return adaptation
+
+
+def _adapt_unary_stream_event(unary_stream_event):
+
+    def adaptation(request, servicer_context):
+        callback = _Callback()
+        if not servicer_context.add_callback(callback.cancel):
+            raise abandonment.Abandoned()
+        unary_stream_event(request, callback,
+                           _FaceServicerContext(servicer_context))
+        while True:
+            response = callback.draw_one_value()
+            if response is None:
+                return
+            else:
+                yield response
+
+    return adaptation
+
+
+def _adapt_stream_unary_event(stream_unary_event):
+
+    def adaptation(request_iterator, servicer_context):
+        callback = _Callback()
+        if not servicer_context.add_callback(callback.cancel):
+            raise abandonment.Abandoned()
+        request_consumer = stream_unary_event(
+            callback.consume_and_terminate,
+            _FaceServicerContext(servicer_context))
+        _run_request_pipe_thread(request_iterator, request_consumer,
+                                 servicer_context)
+        return callback.draw_all_values()[0]
+
+    return adaptation
+
+
+def _adapt_stream_stream_event(stream_stream_event):
+
+    def adaptation(request_iterator, servicer_context):
+        callback = _Callback()
+        if not servicer_context.add_callback(callback.cancel):
+            raise abandonment.Abandoned()
+        request_consumer = stream_stream_event(
+            callback, _FaceServicerContext(servicer_context))
+        _run_request_pipe_thread(request_iterator, request_consumer,
+                                 servicer_context)
+        while True:
+            response = callback.draw_one_value()
+            if response is None:
+                return
+            else:
+                yield response
+
+    return adaptation
+
+
+class _SimpleMethodHandler(
+        collections.namedtuple('_MethodHandler', (
+            'request_streaming',
+            'response_streaming',
+            'request_deserializer',
+            'response_serializer',
+            'unary_unary',
+            'unary_stream',
+            'stream_unary',
+            'stream_stream',
+        )), grpc.RpcMethodHandler):
+    pass
+
+
+def _simple_method_handler(implementation, request_deserializer,
+                           response_serializer):
+    if implementation.style is style.Service.INLINE:
+        if implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
+            return _SimpleMethodHandler(
+                False, False, request_deserializer, response_serializer,
+                _adapt_unary_request_inline(implementation.unary_unary_inline),
+                None, None, None)
+        elif implementation.cardinality is cardinality.Cardinality.UNARY_STREAM:
+            return _SimpleMethodHandler(
+                False, True, request_deserializer, response_serializer, None,
+                _adapt_unary_request_inline(implementation.unary_stream_inline),
+                None, None)
+        elif implementation.cardinality is cardinality.Cardinality.STREAM_UNARY:
+            return _SimpleMethodHandler(
+                True, False, request_deserializer, response_serializer, None,
+                None,
+                _adapt_stream_request_inline(
+                    implementation.stream_unary_inline), None)
+        elif implementation.cardinality is cardinality.Cardinality.STREAM_STREAM:
+            return _SimpleMethodHandler(
+                True, True, request_deserializer, response_serializer, None,
+                None, None,
+                _adapt_stream_request_inline(
+                    implementation.stream_stream_inline))
+    elif implementation.style is style.Service.EVENT:
+        if implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
+            return _SimpleMethodHandler(
+                False, False, request_deserializer, response_serializer,
+                _adapt_unary_unary_event(implementation.unary_unary_event),
+                None, None, None)
+        elif implementation.cardinality is cardinality.Cardinality.UNARY_STREAM:
+            return _SimpleMethodHandler(
+                False, True, request_deserializer, response_serializer, None,
+                _adapt_unary_stream_event(implementation.unary_stream_event),
+                None, None)
+        elif implementation.cardinality is cardinality.Cardinality.STREAM_UNARY:
+            return _SimpleMethodHandler(
+                True, False, request_deserializer, response_serializer, None,
+                None,
+                _adapt_stream_unary_event(implementation.stream_unary_event),
+                None)
+        elif implementation.cardinality is cardinality.Cardinality.STREAM_STREAM:
+            return _SimpleMethodHandler(
+                True, True, request_deserializer, response_serializer, None,
+                None, None,
+                _adapt_stream_stream_event(implementation.stream_stream_event))
+    raise ValueError()
+
+
+def _flatten_method_pair_map(method_pair_map):
+    method_pair_map = method_pair_map or {}
+    flat_map = {}
+    for method_pair in method_pair_map:
+        method = _common.fully_qualified_method(method_pair[0], method_pair[1])
+        flat_map[method] = method_pair_map[method_pair]
+    return flat_map
+
+
+class _GenericRpcHandler(grpc.GenericRpcHandler):
+
+    def __init__(self, method_implementations, multi_method_implementation,
+                 request_deserializers, response_serializers):
+        self._method_implementations = _flatten_method_pair_map(
+            method_implementations)
+        self._request_deserializers = _flatten_method_pair_map(
+            request_deserializers)
+        self._response_serializers = _flatten_method_pair_map(
+            response_serializers)
+        self._multi_method_implementation = multi_method_implementation
+
+    def service(self, handler_call_details):
+        method_implementation = self._method_implementations.get(
+            handler_call_details.method)
+        if method_implementation is not None:
+            return _simple_method_handler(
+                method_implementation,
+                self._request_deserializers.get(handler_call_details.method),
+                self._response_serializers.get(handler_call_details.method))
+        elif self._multi_method_implementation is None:
+            return None
+        else:
+            try:
+                return None  #TODO(nathaniel): call the multimethod.
+            except face.NoSuchMethodError:
+                return None
+
+
+class _Server(interfaces.Server):
+
+    def __init__(self, grpc_server):
+        self._grpc_server = grpc_server
+
+    def add_insecure_port(self, address):
+        return self._grpc_server.add_insecure_port(address)
+
+    def add_secure_port(self, address, server_credentials):
+        return self._grpc_server.add_secure_port(address, server_credentials)
+
+    def start(self):
+        self._grpc_server.start()
+
+    def stop(self, grace):
+        return self._grpc_server.stop(grace)
+
+    def __enter__(self):
+        self._grpc_server.start()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self._grpc_server.stop(None)
+        return False
+
+
+def server(service_implementations, multi_method_implementation,
+           request_deserializers, response_serializers, thread_pool,
+           thread_pool_size):
+    generic_rpc_handler = _GenericRpcHandler(service_implementations,
+                                             multi_method_implementation,
+                                             request_deserializers,
+                                             response_serializers)
+    if thread_pool is None:
+        effective_thread_pool = logging_pool.pool(
+            _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size
+        )
+    else:
+        effective_thread_pool = thread_pool
+    return _Server(
+        grpc.server(effective_thread_pool, handlers=(generic_rpc_handler,)))