| // |
| // |
| // 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_SRC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H |
| #define GRPC_SRC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include <utility> |
| #include <vector> |
| |
| #include "absl/strings/string_view.h" |
| |
| #include <grpc/grpc.h> |
| |
| #include "src/core/lib/channel/channel_fwd.h" |
| #include "src/core/lib/channel/channel_stack_builder.h" |
| #include "src/core/lib/gpr/useful.h" |
| #include "src/core/lib/gprpp/ref_counted.h" |
| #include "src/core/lib/gprpp/ref_counted_ptr.h" |
| |
| namespace grpc_core { |
| |
| // XdsChannelStackModifier allows for inserting xDS HTTP filters into the |
| // channel stack. It is registered to mutate the |
| // `ChannelStackBuilder` 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(ChannelStackBuilder* builder); |
| grpc_arg MakeChannelArg() const; |
| static RefCountedPtr<XdsChannelStackModifier> GetFromChannelArgs( |
| const grpc_channel_args& args); |
| static absl::string_view ChannelArgName(); |
| static int ChannelArgsCompare(const XdsChannelStackModifier* a, |
| const XdsChannelStackModifier* b) { |
| return QsortCompare(a, b); |
| } |
| |
| private: |
| std::vector<const grpc_channel_filter*> filters_; |
| }; |
| |
| } // namespace grpc_core |
| |
| #endif // GRPC_SRC_CORE_EXT_XDS_XDS_CHANNEL_STACK_MODIFIER_H |