/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.internal.batchimport;

import java.io.IOException;
import java.util.concurrent.atomic.LongAdder;
import org.neo4j.internal.batchimport.input.InputChunk;
import org.neo4j.internal.batchimport.staging.StageControl;

/**
 * Allocates its own {@link InputChunk} and loops, getting input data, importing input data into store
 * until no more chunks are available.
 */
class ExhaustingEntityImporterRunnable implements Runnable {
    private final InputIterator data;
    private final EntityImporter visitor;
    private final LongAdder roughEntityCountProgress;
    private final StageControl control;

    ExhaustingEntityImporterRunnable(
            StageControl control, InputIterator data, EntityImporter visitor, LongAdder roughEntityCountProgress) {
        this.control = control;
        this.data = data;
        this.visitor = visitor;
        this.roughEntityCountProgress = roughEntityCountProgress;
    }

    @Override
    public void run() {
        try (InputChunk chunk = data.newChunk()) {
            while (data.next(chunk)) {
                control.assertHealthy();
                int count = 0;
                while (chunk.next(visitor)) {
                    count++;
                }
                roughEntityCountProgress.add(count);
            }
        } catch (IOException e) {
            control.panic(e);
            throw new RuntimeException(e);
        } catch (Throwable e) {
            control.panic(e);
            throw e;
        } finally {
            visitor.close();
        }
    }
}
