Program Listing for File deserialize.cpp

            

            
/*
* 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/stages/deserialize.hpp"

#include "mrc/node/rx_sink_base.hpp"
#include "mrc/node/rx_source_base.hpp"
#include "mrc/node/sink_properties.hpp"
#include "mrc/node/source_properties.hpp"
#include "mrc/segment/object.hpp"
#include "mrc/types.hpp"

#include "morpheus/types.hpp"
#include "morpheus/utilities/python_util.hpp"
#include "morpheus/utilities/string_util.hpp"

#include <glog/logging.h>
#include <mrc/segment/builder.hpp>
#include <pyerrors.h>
#include <pymrc/node.hpp>
#include <rxcpp/rx.hpp>

#include <algorithm> // for min
#include <exception>
#include <functional>
#include <memory>
#include <optional>
#include <sstream>
#include <utility>

namespace morpheus {
// Component public implementations
// ************ DeserializationStage **************************** //
DeserializeStage::DeserializeStage(TensorIndex batch_size, bool ensure_sliceable_index) :
  PythonNode(base_t::op_factory_from_sub_fn(build_operator())),
  m_batch_size(batch_size),
  m_ensure_sliceable_index(ensure_sliceable_index)
{}

DeserializeStage::subscribe_fn_t DeserializeStage::build_operator()
{
    return [this](rxcpp::observable<sink_type_t> input, rxcpp::subscriber<source_type_t> output) {
        return input.subscribe(rxcpp::make_observer<sink_type_t>(
            [this, &output](sink_type_t x) {
                if (!x->has_sliceable_index())
                {
                    if (m_ensure_sliceable_index)
                    {
                        auto old_index_name = x->ensure_sliceable_index();

                        if (old_index_name.has_value())
                        {
                            // Generate a warning
                            LOG(WARNING) << MORPHEUS_CONCAT_STR(
                                "Incoming MessageMeta does not have a unique and monotonic index. Updating index "
                                "to be unique. Existing index will be retained in column '"
                                << *old_index_name << "'");
                        }
                    }
                    else
                    {
                        utilities::show_warning_message(
                            "Detected a non-sliceable index on an incoming MessageMeta. Performance when taking slices "
                            "of messages may be degraded. Consider setting `ensure_sliceable_index==True`",
                            PyExc_RuntimeWarning);
                    }
                }

                // Make one large MultiMessage
                auto full_message = std::make_shared<MultiMessage>(x, 0, x->count());

                // Loop over the MessageMeta and create sub-batches
                for (TensorIndex i = 0; i < x->count(); i += this->m_batch_size)
                {
                    auto next = full_message->get_slice(i, std::min(i + this->m_batch_size, x->count()));

                    output.on_next(std::move(next));
                }
            },
            [&](std::exception_ptr error_ptr) { output.on_error(error_ptr); },
            [&]() { output.on_completed(); }));
    };
}

// ************ DeserializationStageInterfaceProxy ************* //
std::shared_ptr<mrc::segment::Object<DeserializeStage>> DeserializeStageInterfaceProxy::init(
    mrc::segment::Builder& builder, const std::string& name, TensorIndex batch_size, bool ensure_sliceable_index)
{
    auto stage = builder.construct_object<DeserializeStage>(name, batch_size, ensure_sliceable_index);

    return stage;
}
}  // namespace morpheus