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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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108 lines
3.8 KiB
108 lines
3.8 KiB
/* |
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* |
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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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* |
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*/ |
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#include <iostream> |
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#include <memory> |
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#include <string> |
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#include "absl/flags/flag.h" |
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#include "absl/flags/parse.h" |
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#include "absl/strings/str_cat.h" |
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#include <grpcpp/ext/admin_services.h> |
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#include <grpcpp/ext/proto_server_reflection_plugin.h> |
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#include <grpcpp/grpcpp.h> |
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#include <grpcpp/health_check_service_interface.h> |
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#include <grpcpp/xds_server_builder.h> |
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#ifdef BAZEL_BUILD |
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#include "examples/protos/helloworld.grpc.pb.h" |
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#else |
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#include "helloworld.grpc.pb.h" |
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#endif |
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ABSL_FLAG(int32_t, port, 50051, "Server port for service."); |
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ABSL_FLAG(int32_t, maintenance_port, 50052, |
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"Server port for maintenance if --secure is used."); |
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ABSL_FLAG(bool, secure, true, "Secure mode"); |
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using grpc::Server; |
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using grpc::ServerBuilder; |
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using grpc::ServerContext; |
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using grpc::Status; |
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using helloworld::Greeter; |
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using helloworld::HelloReply; |
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using helloworld::HelloRequest; |
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// Logic and data behind the server's behavior. |
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class GreeterServiceImpl final : public Greeter::Service { |
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Status SayHello(ServerContext* context, const HelloRequest* request, |
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HelloReply* reply) override { |
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std::string prefix("Hello "); |
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reply->set_message(prefix + request->name()); |
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return Status::OK; |
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} |
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}; |
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void RunServer() { |
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grpc::EnableDefaultHealthCheckService(true); |
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grpc::reflection::InitProtoReflectionServerBuilderPlugin(); |
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int port = absl::GetFlag(FLAGS_port); |
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int maintenance_port = absl::GetFlag(FLAGS_maintenance_port); |
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grpc::XdsServerBuilder xds_builder; |
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ServerBuilder builder; |
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std::unique_ptr<Server> xds_enabled_server; |
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std::unique_ptr<Server> server; |
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GreeterServiceImpl service; |
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// Register "service" as the instance through which we'll communicate with |
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// clients. In this case it corresponds to an *synchronous* service. |
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xds_builder.RegisterService(&service); |
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if (absl::GetFlag(FLAGS_secure)) { |
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// Listen on the given address with XdsServerCredentials and a fallback of |
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// InsecureServerCredentials |
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xds_builder.AddListeningPort( |
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absl::StrCat("0.0.0.0:", port), |
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grpc::XdsServerCredentials(grpc::InsecureServerCredentials())); |
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xds_enabled_server = xds_builder.BuildAndStart(); |
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gpr_log(GPR_INFO, "Server starting on 0.0.0.0:%d", port); |
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grpc::AddAdminServices(&builder); |
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// For the maintenance server, do not use any authentication mechanism. |
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builder.AddListeningPort(absl::StrCat("0.0.0.0:", maintenance_port), |
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grpc::InsecureServerCredentials()); |
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server = builder.BuildAndStart(); |
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gpr_log(GPR_INFO, "Maintenance server listening on 0.0.0.0:%d", |
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maintenance_port); |
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} else { |
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grpc::AddAdminServices(&xds_builder); |
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// Listen on the given address without any authentication mechanism. |
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builder.AddListeningPort(absl::StrCat("0.0.0.0:", port), |
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grpc::InsecureServerCredentials()); |
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server = xds_builder.BuildAndStart(); |
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gpr_log(GPR_INFO, "Server listening on 0.0.0.0:%d", port); |
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} |
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// Wait for the server to shutdown. Note that some other thread must be |
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// responsible for shutting down the server for this call to ever return. |
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server->Wait(); |
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} |
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int main(int argc, char** argv) { |
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absl::ParseCommandLine(argc, argv); |
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RunServer(); |
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return 0; |
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}
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