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// // // Copyright 2021 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. // // #ifndef GRPC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H #define GRPC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H #include <grpc/support/port_platform.h> #include <vector> #include "src/core/lib/channel/channel_stack.h" #include "src/core/lib/channel/channel_stack_builder.h" #include "src/core/lib/gprpp/ref_counted.h" namespace grpc_core { // XdsChannelStackModifier allows for inserting xDS HTTP filters into the // channel stack. It is registered to mutate the `grpc_channel_stack_builder` // object via ChannelInit::Builder::RegisterStage. class XdsChannelStackModifier : public RefCounted<XdsChannelStackModifier> { public: explicit XdsChannelStackModifier( std::vector<const grpc_channel_filter*> filters) : filters_(std::move(filters)) {} // Returns true on success, false otherwise. bool ModifyChannelStack(grpc_channel_stack_builder* builder); grpc_arg MakeChannelArg() const; static RefCountedPtr<XdsChannelStackModifier> GetFromChannelArgs( const grpc_channel_args& args); private: std::vector<const grpc_channel_filter*> filters_; }; } // namespace grpc_core #endif /* GRPC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H */
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