Program Listing for File data_loader_registry.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/io/data_loader_registry.hpp"
#include "morpheus/io/data_loader.hpp"
#include "morpheus/io/loaders/lambda.hpp"
#include "morpheus/messages/control.hpp"
#include "morpheus/objects/factory_registry.hpp"
#include <glog/logging.h>
#include <nlohmann/json.hpp>
#include <pybind11/cast.h>
#include <pybind11/gil.h>
#include <pybind11/pybind11.h>
#include <pymrc/utils.hpp>
#include <array>
#include <iostream>
#include <utility>
namespace morpheus {
template class FactoryRegistry<Loader>;
void LoaderRegistryProxy::register_proxy_factory_fn(
const std::string& name,
std::function<std::shared_ptr<ControlMessage>(std::shared_ptr<ControlMessage> control_message, pybind11::dict task)>
proxy_constructor,
bool throw_if_exists)
{
LoaderRegistry::register_factory_fn(
name,
[proxy_constructor](nlohmann::json config) {
return std::make_shared<LambdaLoader>(
[proxy_constructor](std::shared_ptr<ControlMessage> control_message, nlohmann::json task) {
pybind11::gil_scoped_acquire gil;
auto py_task = mrc::pymrc::cast_from_json(task);
return std::move(proxy_constructor(control_message, py_task));
},
config);
},
throw_if_exists);
register_factory_cleanup_fn(name);
}
void LoaderRegistryProxy::register_factory_cleanup_fn(const std::string& name)
{
{
auto at_exit = pybind11::module_::import("atexit");
at_exit.attr("register")(pybind11::cpp_function([name]() {
VLOG(2) << "(atexit) Unregistering loader: " << name;
// Try unregister -- ignore if already unregistered
FactoryRegistry<Loader>::unregister_factory_fn(name, false);
}));
}
}
} // namespace morpheus