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// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
//
// 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 "bytestream_server.hpp"
#include <cstddef>
#include <fstream>
#include <sstream>
#include <utility>
#include "fmt/core.h"
#include "src/buildtool/common/artifact_digest.hpp"
#include "src/buildtool/common/artifact_digest_factory.hpp"
#include "src/buildtool/common/bazel_types.hpp"
#include "src/buildtool/execution_api/common/bytestream_utils.hpp"
#include "src/buildtool/execution_api/execution_service/cas_utils.hpp"
#include "src/buildtool/file_system/file_system_manager.hpp"
#include "src/buildtool/logging/log_level.hpp"
#include "src/buildtool/storage/garbage_collector.hpp"
#include "src/utils/cpp/tmp_dir.hpp"
auto BytestreamServiceImpl::Read(
::grpc::ServerContext* /*context*/,
const ::google::bytestream::ReadRequest* request,
::grpc::ServerWriter<::google::bytestream::ReadResponse>* writer)
-> ::grpc::Status {
logger_.Emit(LogLevel::Trace, "Read {}", request->resource_name());
auto const read_request =
ByteStreamUtils::ReadRequest::FromString(request->resource_name());
if (not read_request) {
auto const str =
fmt::format("could not parse {}", request->resource_name());
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
auto const read_digest = ArtifactDigestFactory::FromBazel(
storage_config_.hash_function.GetType(), read_request->GetDigest());
if (not read_digest) {
logger_.Emit(LogLevel::Debug, "{}", read_digest.error());
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT,
read_digest.error()};
}
auto const lock = GarbageCollector::SharedLock(storage_config_);
if (not lock) {
static constexpr auto str = "Could not acquire SharedLock";
logger_.Emit(LogLevel::Error, "{}", str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
auto const path =
read_digest->IsTree()
? storage_.CAS().TreePath(*read_digest)
: storage_.CAS().BlobPath(*read_digest, /*is_executable=*/false);
if (not path) {
auto const str = fmt::format("could not find {}", read_digest->hash());
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{::grpc::StatusCode::NOT_FOUND, str};
}
std::ifstream stream{*path, std::ios::binary};
stream.seekg(request->read_offset(), std::ios::beg);
::google::bytestream::ReadResponse response;
std::string& buffer = *response.mutable_data();
buffer.resize(ByteStreamUtils::kChunkSize);
while (not stream.eof()) {
stream.read(buffer.data(), ByteStreamUtils::kChunkSize);
if (stream.bad()) {
auto const str =
fmt::format("Failed to read data for {}", read_digest->hash());
logger_.Emit(LogLevel::Error, str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
if (stream.eof()) {
// do not send random bytes
buffer.resize(static_cast<std::size_t>(stream.gcount()));
}
writer->Write(response);
}
return ::grpc::Status::OK;
}
auto BytestreamServiceImpl::Write(
::grpc::ServerContext* /*context*/,
::grpc::ServerReader<::google::bytestream::WriteRequest>* reader,
::google::bytestream::WriteResponse* response) -> ::grpc::Status {
::google::bytestream::WriteRequest request;
reader->Read(&request);
logger_.Emit(LogLevel::Debug, "write {}", request.resource_name());
auto const write_request =
ByteStreamUtils::WriteRequest::FromString(request.resource_name());
if (not write_request) {
auto const str =
fmt::format("could not parse {}", request.resource_name());
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT, str};
}
auto const write_digest = ArtifactDigestFactory::FromBazel(
storage_config_.hash_function.GetType(), write_request->GetDigest());
if (not write_digest) {
logger_.Emit(LogLevel::Debug, "{}", write_digest.error());
return ::grpc::Status{::grpc::StatusCode::INVALID_ARGUMENT,
write_digest.error()};
}
logger_.Emit(LogLevel::Trace,
"Write: {}, offset {}, finish write {}",
write_digest->hash(),
request.write_offset(),
request.finish_write());
auto const lock = GarbageCollector::SharedLock(storage_config_);
if (not lock) {
static constexpr auto str = "Could not acquire SharedLock";
logger_.Emit(LogLevel::Error, "{}", str);
return grpc::Status{grpc::StatusCode::INTERNAL, str};
}
auto const tmp_dir = storage_config_.CreateTypedTmpDir("execution-service");
if (not tmp_dir) {
return ::grpc::Status{::grpc::StatusCode::INTERNAL,
"could not create TmpDir"};
}
auto tmp = tmp_dir->GetPath() / write_digest->hash();
{
std::ofstream stream{tmp, std::ios::binary};
do {
if (not stream.good()) {
auto const str = fmt::format("Failed to write data for {}",
write_digest->hash());
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{::grpc::StatusCode::INTERNAL, str};
}
stream.write(request.data().data(),
static_cast<std::streamsize>(request.data().size()));
} while (not request.finish_write() and reader->Read(&request));
}
auto const status = CASUtils::AddFileToCAS(*write_digest, tmp, storage_);
if (not status.ok()) {
auto const str = fmt::format("Write: {}", status.error_message());
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{status.error_code(), str};
}
response->set_committed_size(
static_cast<google::protobuf::int64>(std::filesystem::file_size(tmp)));
return ::grpc::Status::OK;
}
auto BytestreamServiceImpl::QueryWriteStatus(
::grpc::ServerContext* /*context*/,
const ::google::bytestream::QueryWriteStatusRequest* /*request*/,
::google::bytestream::QueryWriteStatusResponse* /*response*/)
-> ::grpc::Status {
static constexpr auto str = "QueryWriteStatus not implemented";
logger_.Emit(LogLevel::Error, "{}", str);
return ::grpc::Status{grpc::StatusCode::UNIMPLEMENTED, str};
}
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