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echo_service_impl.cc
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echo_service_impl.cc
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/**
*
* Copyright 2018 Google LLC
*
* 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
*
* https://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.
*
*/
#include "net/grpc/gateway/examples/echo/echo_service_impl.h"
#include <grpcpp/grpcpp.h>
#include <unistd.h>
#include <string>
#include "net/grpc/gateway/examples/echo/echo.grpc.pb.h"
using grpc::ServerContext;
using grpc::ServerWriter;
using grpc::Status;
using grpc::gateway::testing::EchoRequest;
using grpc::gateway::testing::EchoResponse;
using grpc::gateway::testing::EchoService;
using grpc::gateway::testing::Empty;
using grpc::gateway::testing::ServerStreamingEchoRequest;
using grpc::gateway::testing::ServerStreamingEchoResponse;
EchoServiceImpl::EchoServiceImpl() {}
EchoServiceImpl::~EchoServiceImpl() {}
void EchoServiceImpl::CopyClientMetadataToResponse(ServerContext* context) {
for (auto& client_metadata : context->client_metadata()) {
context->AddInitialMetadata(std::string(client_metadata.first.data(),
client_metadata.first.length()),
std::string(client_metadata.second.data(),
client_metadata.second.length()));
context->AddTrailingMetadata(
std::string(client_metadata.first.data(),
client_metadata.first.length()),
std::string(client_metadata.second.data(),
client_metadata.second.length()));
}
}
Status EchoServiceImpl::Echo(ServerContext* context, const EchoRequest* request,
EchoResponse* response) {
CopyClientMetadataToResponse(context);
response->set_message(request->message());
return Status::OK;
}
Status EchoServiceImpl::EchoAbort(ServerContext* context,
const EchoRequest* request,
EchoResponse* response) {
CopyClientMetadataToResponse(context);
response->set_message(request->message());
return Status(grpc::StatusCode::ABORTED,
"Aborted from server side.");
}
Status EchoServiceImpl::NoOp(ServerContext* context, const Empty* request,
Empty* response) {
CopyClientMetadataToResponse(context);
return Status::OK;
}
Status EchoServiceImpl::ServerStreamingEcho(
ServerContext* context, const ServerStreamingEchoRequest* request,
ServerWriter<ServerStreamingEchoResponse>* writer) {
CopyClientMetadataToResponse(context);
for (int i = 0; i < request->message_count(); i++) {
if (context->IsCancelled()) {
return Status::CANCELLED;
}
ServerStreamingEchoResponse response;
response.set_message(request->message());
usleep(request->message_interval() * 1000);
writer->Write(response);
}
return Status::OK;
}
Status EchoServiceImpl::ServerStreamingEchoAbort(
ServerContext* context, const ServerStreamingEchoRequest* request,
ServerWriter<ServerStreamingEchoResponse>* writer) {
CopyClientMetadataToResponse(context);
ServerStreamingEchoResponse response;
response.set_message(request->message());
writer->Write(response);
return Status(grpc::StatusCode::ABORTED,
"Aborted from server side.");
}