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/*
*
* Copyright 2018 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.
*
*/
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <grpcpp/grpcpp.h>
#ifdef BAZEL_BUILD
#include "examples/protos/keyvaluestore.grpc.pb.h"
#else
#include "keyvaluestore.grpc.pb.h"
#endif
using grpc::Server;
using grpc::ServerBuilder;
using grpc::ServerContext;
using grpc::ServerReaderWriter;
using grpc::Status;
using keyvaluestore::KeyValueStore;
using keyvaluestore::Request;
using keyvaluestore::Response;
struct kv_pair {
const char* key;
const char* value;
};
static const kv_pair kvs_map[] = {
{"key1", "value1"}, {"key2", "value2"}, {"key3", "value3"},
{"key4", "value4"}, {"key5", "value5"},
};
const char* get_value_from_map(const char* key) {
for (size_t i = 0; i < sizeof(kvs_map) / sizeof(kv_pair); ++i) {
if (strcmp(key, kvs_map[i].key) == 0) {
return kvs_map[i].value;
}
}
return "";
}
// Logic and data behind the server's behavior.
class KeyValueStoreServiceImpl final : public KeyValueStore::Service {
Status GetValues(ServerContext* context,
ServerReaderWriter<Response, Request>* stream) override {
Request request;
while (stream->Read(&request)) {
Response response;
response.set_value(get_value_from_map(request.key().c_str()));
stream->Write(response);
}
return Status::OK;
}
};
void RunServer() {
std::string server_address("0.0.0.0:50051");
KeyValueStoreServiceImpl service;
ServerBuilder builder;
// Listen on the given address without any authentication mechanism.
builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
// Register "service" as the instance through which we'll communicate with
// clients. In this case, it corresponds to an *synchronous* service.
builder.RegisterService(&service);
// Finally assemble the server.
std::unique_ptr<Server> server(builder.BuildAndStart());
std::cout << "Server listening on " << server_address << std::endl;
// Wait for the server to shutdown. Note that some other thread must be
// responsible for shutting down the server for this call to ever return.
server->Wait();
}
int main(int argc, char** argv) {
RunServer();
return 0;
}
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