| # 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 |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| """Beta API stub implementation.""" |
| |
| import threading |
| |
| from grpc._links import invocation |
| 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 = 6 |
| |
| |
| class _AutoIntermediary(object): |
| |
| def __init__(self, delegate, on_deletion): |
| self._delegate = delegate |
| self._on_deletion = on_deletion |
| |
| def __getattr__(self, attr): |
| return getattr(self._delegate, attr) |
| |
| def __del__(self): |
| self._on_deletion() |
| |
| |
| def _assemble( |
| channel, host, metadata_transformer, request_serializers, |
| response_deserializers, thread_pool, thread_pool_size): |
| end_link = _core_implementations.invocation_end_link() |
| grpc_link = invocation.invocation_link( |
| channel, host, metadata_transformer, request_serializers, |
| response_deserializers) |
| if thread_pool is None: |
| invocation_pool = logging_pool.pool( |
| _DEFAULT_POOL_SIZE if thread_pool_size is None else thread_pool_size) |
| assembly_pool = invocation_pool |
| else: |
| invocation_pool = thread_pool |
| assembly_pool = None |
| end_link.join_link(grpc_link) |
| grpc_link.join_link(end_link) |
| end_link.start() |
| grpc_link.start() |
| return end_link, grpc_link, invocation_pool, assembly_pool |
| |
| |
| def _disassemble(end_link, grpc_link, pool): |
| end_link.stop(24 * 60 * 60).wait() |
| grpc_link.stop() |
| end_link.join_link(utilities.NULL_LINK) |
| grpc_link.join_link(utilities.NULL_LINK) |
| if pool is not None: |
| pool.shutdown(wait=True) |
| |
| |
| def _wrap_assembly(stub, end_link, grpc_link, assembly_pool): |
| disassembly_thread = threading.Thread( |
| target=_disassemble, args=(end_link, grpc_link, assembly_pool)) |
| return _AutoIntermediary(stub, disassembly_thread.start) |
| |
| |
| def generic_stub( |
| channel, host, metadata_transformer, request_serializers, |
| response_deserializers, thread_pool, thread_pool_size): |
| end_link, grpc_link, invocation_pool, assembly_pool = _assemble( |
| channel, host, metadata_transformer, request_serializers, |
| response_deserializers, thread_pool, thread_pool_size) |
| stub = _crust_implementations.generic_stub(end_link, invocation_pool) |
| return _wrap_assembly(stub, end_link, grpc_link, assembly_pool) |
| |
| |
| def dynamic_stub( |
| channel, host, service, cardinalities, metadata_transformer, |
| request_serializers, response_deserializers, thread_pool, |
| thread_pool_size): |
| end_link, grpc_link, invocation_pool, assembly_pool = _assemble( |
| channel, host, metadata_transformer, request_serializers, |
| response_deserializers, thread_pool, thread_pool_size) |
| stub = _crust_implementations.dynamic_stub( |
| end_link, service, cardinalities, invocation_pool) |
| return _wrap_assembly(stub, end_link, grpc_link, assembly_pool) |