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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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75 lines
2.7 KiB
75 lines
2.7 KiB
// |
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// |
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// Copyright 2020 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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// |
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// |
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#ifndef GRPCPP_XDS_SERVER_BUILDER_H |
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#define GRPCPP_XDS_SERVER_BUILDER_H |
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#include <grpc/impl/codegen/port_platform.h> |
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#include <grpcpp/server_builder.h> |
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namespace grpc { |
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namespace experimental { |
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class XdsServerServingStatusNotifierInterface { |
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public: |
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virtual ~XdsServerServingStatusNotifierInterface() = default; |
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// \a uri contains the listening target associated with the notification. Note |
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// that a single target provided to XdsServerBuilder can get resolved to |
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// multiple listening addresses. Status::OK signifies that the server is |
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// serving, while a non-OK status signifies that the server is not serving. |
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virtual void OnServingStatusChange(std::string uri, grpc::Status status) = 0; |
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}; |
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class XdsServerBuilder : public ::grpc::ServerBuilder { |
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public: |
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// It is the responsibility of the application to make sure that \a notifier |
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// outlasts the life of the server. Notifications will start being made |
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// asynchronously once `BuildAndStart()` has been called. Note that it is |
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// possible for notifications to be made before `BuildAndStart()` returns. |
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void set_status_notifier(XdsServerServingStatusNotifierInterface* notifier) { |
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notifier_ = notifier; |
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} |
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std::unique_ptr<Server> BuildAndStart() override { |
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grpc_server_config_fetcher* fetcher = grpc_server_config_fetcher_xds_create( |
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{OnServingStatusChange, notifier_}); |
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if (fetcher == nullptr) return nullptr; |
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set_fetcher(fetcher); |
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return ServerBuilder::BuildAndStart(); |
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} |
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private: |
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static void OnServingStatusChange(void* user_data, const char* uri, |
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grpc_status_code code, |
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const char* error_message) { |
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if (user_data == nullptr) return; |
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XdsServerServingStatusNotifierInterface* notifier = |
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static_cast<XdsServerServingStatusNotifierInterface*>(user_data); |
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notifier->OnServingStatusChange( |
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uri, grpc::Status(static_cast<StatusCode>(code), error_message)); |
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} |
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XdsServerServingStatusNotifierInterface* notifier_ = nullptr; |
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}; |
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} // namespace experimental |
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} // namespace grpc |
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#endif /* GRPCPP_XDS_SERVER_BUILDER_H */
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