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fragment store fully file2 zstd. no more zstd.h in fragment store

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Green Sky 2024-04-06 14:23:43 +02:00
parent 268cbe137e
commit fd0b210bbb
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1 changed files with 28 additions and 29 deletions
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57
src/fragment_store/fragment_store.cpp
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@ -13,8 +13,6 @@
#include "./file2_stack.hpp"
#include <zstd.h>
#include <cstdint>
#include <fstream>
#include <filesystem>
@ -281,44 +279,44 @@ bool FragmentStore::syncToStorage(FragmentID fid, std::function<write_to_storage
}
if (meta_type == MetaFileType::BINARY_MSGPACK) { // binary metadata file
std::vector<uint8_t> binary_meta_data;
{
std::stack<std::unique_ptr<File2I>> binary_writer_stack;
binary_writer_stack.push(std::make_unique<File2MemW>(binary_meta_data));
if (!buildStackWrite(binary_writer_stack, meta_enc, meta_comp)) {
while (!meta_file_stack.empty()) { meta_file_stack.pop(); }
std::filesystem::remove(meta_tmp_path);
while (!data_file_stack.empty()) { data_file_stack.pop(); }
std::filesystem::remove(data_tmp_path);
std::cerr << "FS error: binary writer creation failed '" << _reg.get<FragComp::Ephemeral::FilePath>(fid).path << "'\n";
return false;
}
{
const std::vector<uint8_t> meta_data = nlohmann::json::to_msgpack(meta_data_j);
std::vector<uint8_t> meta_data_compressed; // empty if none
//std::vector<uint8_t> meta_data_encrypted; // empty if none
if (meta_comp == Compression::ZSTD) {
meta_data_compressed.resize(ZSTD_compressBound(meta_data.size()));
size_t const cSize = ZSTD_compress(meta_data_compressed.data(), meta_data_compressed.size(), meta_data.data(), meta_data.size(), 0); // 0 is default is probably 3
if (ZSTD_isError(cSize)) {
std::cerr << "FS error: compressing meta failed\n";
meta_data_compressed.clear();
meta_comp = Compression::NONE;
} else {
meta_data_compressed.resize(cSize);
if (!binary_writer_stack.top()->write(ByteSpan{meta_data})) {
// i feel like exceptions or refactoring would be nice here
while (!meta_file_stack.empty()) { meta_file_stack.pop(); }
std::filesystem::remove(meta_tmp_path);
while (!data_file_stack.empty()) { data_file_stack.pop(); }
std::filesystem::remove(data_tmp_path);
std::cerr << "FS error: binary writer failed '" << _reg.get<FragComp::Ephemeral::FilePath>(fid).path << "'\n";
return false;
}
}
} else if (meta_comp == Compression::NONE) {
// do nothing
} else {
assert(false && "implement me");
}
// TODO: encryption
// the meta file is itself msgpack data
//// the meta file is itself msgpack data
nlohmann::json meta_header_j = nlohmann::json::array();
meta_header_j.emplace_back() = "SOLMET";
meta_header_j.push_back(meta_enc);
meta_header_j.push_back(meta_comp);
if (false) { // TODO: encryption
} else if (!meta_data_compressed.empty()) {
meta_header_j.push_back(nlohmann::json::binary(meta_data_compressed));
} else {
meta_header_j.push_back(nlohmann::json::binary(meta_data));
}
// with a custom msgpack impl like cmp, we can be smarter here and dont need an extra buffer
meta_header_j.push_back(nlohmann::json::binary(binary_meta_data));
const auto meta_header_data = nlohmann::json::to_msgpack(meta_header_j);
//meta_file.write(reinterpret_cast<const char*>(meta_header_data.data()), meta_header_data.size());
meta_file_stack.top()->write({meta_header_data.data(), meta_header_data.size()});
} else if (meta_type == MetaFileType::TEXT_JSON) {
// cant be compressed or encrypted
@ -337,6 +335,7 @@ bool FragmentStore::syncToStorage(FragmentID fid, std::function<write_to_storage
// now data
// for zstd compression, chunk size is frame size. (no cross frame referencing)
// TODO: add buffering steam layer
static constexpr int64_t chunk_size{1024*1024}; // 1MiB should be enough
std::vector<uint8_t> buffer(chunk_size);
uint64_t buffer_actual_size {0};