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Channel args preconditioning (#28132)
* Channel args preconditioning * docs * fixes * Automated change: Fix sanity tests * fix * fix this again after merge error Co-authored-by: ctiller <ctiller@users.noreply.github.com>pull/28181/head
Craig Tiller
3 years ago
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GitHub
parent
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commit
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92 changed files with 624 additions and 339 deletions
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// Copyright 2021 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/channel/channel_args_preconditioning.h" |
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#include <grpc/support/alloc.h> |
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namespace grpc_core { |
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void ChannelArgsPreconditioning::Builder::RegisterStage(Stage stage) { |
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stages_.emplace_back(std::move(stage)); |
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} |
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ChannelArgsPreconditioning ChannelArgsPreconditioning::Builder::Build() { |
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// TODO(ctiller): should probably make this registered too.
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stages_.emplace_back(RemoveGrpcInternalArgs); |
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ChannelArgsPreconditioning preconditioning; |
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preconditioning.stages_ = std::move(stages_); |
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return preconditioning; |
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} |
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const grpc_channel_args* ChannelArgsPreconditioning::PreconditionChannelArgs( |
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const grpc_channel_args* args) const { |
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const grpc_channel_args* owned_args = nullptr; |
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for (auto& stage : stages_) { |
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args = stage(args); |
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grpc_channel_args_destroy(owned_args); |
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owned_args = args; |
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} |
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return args; |
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} |
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} // namespace grpc_core
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// Copyright 2021 gRPC authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef GRPC_CORE_LIB_CHANNEL_CHANNEL_ARGS_PRECONDITIONING_H |
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#define GRPC_CORE_LIB_CHANNEL_CHANNEL_ARGS_PRECONDITIONING_H |
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#include <grpc/support/port_platform.h> |
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#include <functional> |
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#include <vector> |
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#include "src/core/lib/channel/channel_args.h" |
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namespace grpc_core { |
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// Registry of mutators for channel args.
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// Surface APIs should call into this with channel args received from outside
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// of gRPC, in order to prepare those channel args for the expections of the
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// gRPC internals.
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class ChannelArgsPreconditioning { |
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public: |
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// Take channel args and mutate them.
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// Does not take ownership of the channel args passed in.
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// Returns a new channel args object that is owned by the caller.
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using Stage = |
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std::function<const grpc_channel_args*(const grpc_channel_args*)>; |
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class Builder { |
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public: |
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// Register a new channel args preconditioner.
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void RegisterStage(Stage stage); |
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// Build out the preconditioners.
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ChannelArgsPreconditioning Build(); |
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private: |
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std::vector<Stage> stages_; |
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}; |
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// Take channel args and precondition them.
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// Does not take ownership of the channel args passed in.
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// Returns a new channel args object that is owned by the caller.
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const grpc_channel_args* PreconditionChannelArgs( |
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const grpc_channel_args* args) const; |
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private: |
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std::vector<Stage> stages_; |
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}; |
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} // namespace grpc_core
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#endif // GRPC_CORE_LIB_CHANNEL_CHANNEL_ARGS_PRECONDITIONING_H
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