Program Listing for File data_loader_module.cpp
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/*
* SPDX-FileCopyrightText: Copyright (c) 2021-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* 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 "morpheus/modules/data_loader_module.hpp"
#include "mrc/modules/properties/persistent.hpp"
#include "mrc/node/rx_node.hpp"
#include "rxcpp/operators/rx-map.hpp"
#include "morpheus/io/data_loader_registry.hpp"
#include "morpheus/messages/control.hpp"
#include <glog/logging.h>
#include <mrc/modules/segment_modules.hpp>
#include <mrc/segment/builder.hpp>
#include <mrc/utils/type_utils.hpp>
#include <nlohmann/json.hpp>
#include <rxcpp/rx.hpp>
// IWYU pragma: no_include "rxcpp/sources/rx-iterate.hpp"
#include <map>
#include <memory>
#include <ostream>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>
using namespace mrc::modules;
using nlohmann::json;
namespace morpheus {
const std::string DataLoaderModule::s_config_schema = R"()";
DataLoaderModule::DataLoaderModule(std::string module_name) : SegmentModule(module_name) {}
DataLoaderModule::DataLoaderModule(std::string module_name, nlohmann::json _config) :
SegmentModule(std::move(module_name), std::move(_config))
{
if (config().contains("loaders"))
{
// TODO(Devin): Add schema validation
}
if (config().contains("loaders") and config()["loaders"].is_array() and !config()["loaders"].empty())
{
auto loader_list = config()["loaders"];
for (json::iterator it = loader_list.begin(); it != loader_list.end(); ++it)
{
auto loader_id_it = it.value().find("id");
if (loader_id_it == it.value().end())
{
throw std::runtime_error("Loader id not specified");
}
auto loader_id = loader_id_it.value().get<std::string>();
auto loader_properties = it->value("properties", json({}));
if (LoaderRegistry::contains(loader_id))
{
VLOG(2) << "Adding loader: " << loader_id << " with properties: " << loader_properties.dump(2);
m_data_loader.add_loader(loader_id,
LoaderRegistry::create_object_from_factory(loader_id, loader_properties));
}
else
{
throw std::runtime_error("Unknown or unsupported loader type: " + loader_id);
}
}
}
else
{
LOG(WARNING) << "No loaders specified in config: " << config().dump(2);
}
}
void DataLoaderModule::initialize(mrc::segment::Builder& builder)
{
auto loader_node = builder.make_node<std::shared_ptr<ControlMessage>, std::shared_ptr<ControlMessage>>(
"input", rxcpp::operators::map([this](std::shared_ptr<ControlMessage> control_message) {
return m_data_loader.load(control_message);
}));
register_input_port("input", loader_node);
register_output_port("output", loader_node);
}
std::string DataLoaderModule::module_type_name() const
{
return std::string(::mrc::type_name<type_t>());
}
} // namespace morpheus