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// Copyright 2024 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 "src/buildtool/storage/backend_description.hpp"
#include <exception>
#include "fmt/core.h"
#include "nlohmann/json.hpp"
auto DescribeBackend(std::optional<ServerAddress> const& address,
ExecutionProperties const& properties,
std::vector<DispatchEndpoint> const& dispatch) noexcept
-> expected<std::string, std::string> {
nlohmann::json description;
try {
description["remote_address"] =
address ? address->ToJson() : nlohmann::json{};
description["platform_properties"] = properties;
} catch (std::exception const& e) {
return unexpected{
fmt::format("Failed to serialize remote address and "
"platform_properties:\n{}",
e.what())};
}
if (not dispatch.empty()) {
try {
// only add the dispatch list, if not empty, so that keys remain
// not only more readable, but also backwards compatible with
// earlier versions.
auto dispatch_list = nlohmann::json::array();
for (auto const& [props, endpoint] : dispatch) {
auto entry = nlohmann::json::array();
entry.push_back(nlohmann::json(props));
entry.push_back(endpoint.ToJson());
dispatch_list.push_back(entry);
}
description["endpoint dispatch list"] = dispatch_list;
} catch (std::exception const& e) {
return unexpected{fmt::format(
"Failed to serialize endpoint dispatch list:\n{}", e.what())};
}
}
try {
// json::dump with json::error_handler_t::replace will not throw an
// exception if invalid UTF-8 sequences are detected in the input.
// Instead, it will replace them with the UTF-8 replacement
// character, but still it needs to be inside a try-catch clause to
// ensure the noexcept modifier of the enclosing function.
return description.dump(
2, ' ', false, nlohmann::json::error_handler_t::replace);
} catch (std::exception const& e) {
return unexpected{fmt::format(
"Failed to dump backend description to JSON:\n{}", e.what())};
}
}
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