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// Copyright 2009-present MongoDB, Inc.
//
// 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.
#pragma once
#include "../microbench.hpp"
#include <iomanip>
#include <sstream>
#include <thread>
#include <vector>
#include <mongocxx/gridfs/bucket.hpp>
#include <mongocxx/instance.hpp>
#include <mongocxx/pool.hpp>
#include <mongocxx/uri.hpp>
namespace benchmark {
using bsoncxx::builder::basic::kvp;
using bsoncxx::builder::basic::make_document;
class gridfs_multi_export : public microbench {
public:
static const std::uint32_t TOTAL_FILES{50};
gridfs_multi_export() = delete;
// The task size comes from the Driver Perfomance Benchmarking Reference Doc.
gridfs_multi_export(std::string dir,
std::uint32_t thread_num = std::thread::hardware_concurrency())
: microbench{"TestGridFsMultiExport",
262.144,
std::set<benchmark_type>{benchmark_type::parallel_bench,
benchmark_type::read_bench}},
_directory{std::move(dir)},
_pool{mongocxx::uri{}},
_thread_num{thread_num} {}
void setup();
void before_task();
void teardown();
protected:
void task();
private:
void concurrency_task(std::uint32_t start_file, std::uint32_t num_files);
std::string _directory;
mongocxx::pool _pool;
std::vector<bsoncxx::types::bson_value::view> _ids;
std::uint32_t _thread_num;
};
void gridfs_multi_export::setup() {
auto conn = _pool.acquire();
mongocxx::database db = (*conn)["perftest"];
db.drop();
for (std::uint32_t i = 0; i < TOTAL_FILES; i++) {
std::stringstream ss;
ss << _directory << "/file" << std::setfill('0') << std::setw(2) << i << ".txt";
std::string file_name = ss.str();
std::ifstream stream{file_name};
auto bucket = db.gridfs_bucket();
auto result = bucket.upload_from_stream(file_name, &stream);
_ids.push_back(result.id());
}
}
void gridfs_multi_export::before_task() {
for (std::uint32_t i = 0; i < TOTAL_FILES; i++) {
std::stringstream ss;
ss << _directory << "/tmp/file" << std::setfill('0') << std::setw(2) << i << ".txt";
std::remove(ss.str().c_str());
}
}
void gridfs_multi_export::teardown() {
auto conn = _pool.acquire();
(*conn)["perftest"].drop();
}
void gridfs_multi_export::task() {
std::div_t result =
std::div(static_cast<std::int32_t>(TOTAL_FILES), static_cast<std::int32_t>(_thread_num));
std::uint32_t num_each = static_cast<std::uint32_t>(result.quot);
if (result.rem != 0) {
num_each++;
}
std::vector<std::thread> threads;
for (std::uint32_t i = 0; i < TOTAL_FILES; i += num_each) {
threads.push_back(std::thread{
[i, num_each, this] { concurrency_task(i, std::min(TOTAL_FILES - i, num_each)); }});
}
for (std::uint32_t i = 0; i < threads.size(); i++) {
threads[i].join();
}
}
void gridfs_multi_export::concurrency_task(std::uint32_t start_file, std::uint32_t num_files) {
for (std::uint32_t i = start_file; i < start_file + num_files; i++) {
std::stringstream ss;
ss << _directory << "/tmp/file" << std::setfill('0') << std::setw(2) << i << ".txt";
std::ofstream stream{ss.str()};
auto client = _pool.acquire();
auto bucket = (*client)["perftest"].gridfs_bucket();
bucket.download_to_stream(_ids[i], &stream);
}
}
} // namespace benchmark
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