relational_operators/SaveBlocksOperator.cpp

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 "relational_operators/SaveBlocksOperator.hpp"

#include <vector>

#include "query_execution/WorkOrderProtosContainer.hpp"
#include "query_execution/WorkOrdersContainer.hpp"
#include "relational_operators/WorkOrder.pb.h"
#include "storage/StorageBlockInfo.hpp"
#include "storage/StorageManager.hpp"

#include "tmb/id_typedefs.h"

namespace quickstep {

bool SaveBlocksOperator::getAllWorkOrders(
    WorkOrdersContainer *container,
    QueryContext *query_context,
    StorageManager *storage_manager,
    const tmb::client_id scheduler_client_id,
    tmb::MessageBus *bus) {
  while (num_workorders_generated_ < destination_block_ids_.size()) {
    container->addNormalWorkOrder(
        new SaveBlocksWorkOrder(
            query_id_,
            destination_block_ids_[num_workorders_generated_],
            force_,
            storage_manager),
        op_index_);
    ++num_workorders_generated_;
  }
  return done_feeding_input_relation_;
}

bool SaveBlocksOperator::getAllWorkOrderProtos(WorkOrderProtosContainer *container) {
  while (num_workorders_generated_ < destination_block_ids_.size()) {
    serialization::WorkOrder *proto = new serialization::WorkOrder;
    proto->set_work_order_type(serialization::SAVE_BLOCKS);
    proto->set_query_id(query_id_);
    proto->SetExtension(serialization::SaveBlocksWorkOrder::block_id,
                        destination_block_ids_[num_workorders_generated_]);
    proto->SetExtension(serialization::SaveBlocksWorkOrder::force, force_);

    container->addWorkOrderProto(proto, op_index_);

    ++num_workorders_generated_;
  }
  return done_feeding_input_relation_;
}

void SaveBlocksOperator::feedInputBlock(const block_id input_block_id, const relation_id input_relation_id) {
  destination_block_ids_.push_back(input_block_id);
}

void SaveBlocksWorkOrder::execute() {
  // It may happen that the block gets saved to disk as a result of an eviction,
  // before this invocation. In either case, we don't care about the return
  // value of saveBlockOrBlob.
  storage_manager_->saveBlockOrBlob(save_block_id_, force_);
}

}  // namespace quickstep