com.palantir.atlasdb.keyvalue.jdbc.impl.MultiTimestampPutBatch Maven / Gradle / Ivy

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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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.
 */
package com.palantir.atlasdb.keyvalue.jdbc.impl;

import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Collections2;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.palantir.atlasdb.keyvalue.api.Cell;
import com.palantir.atlasdb.keyvalue.api.Value;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import javax.annotation.Nullable;
import org.jooq.InsertValuesStep4;
import org.jooq.Record;
import org.jooq.Result;
import org.jooq.Row3;
import org.jooq.impl.DSL;

public class MultiTimestampPutBatch implements PutBatch {
    private final Multimap data;

    public MultiTimestampPutBatch(Multimap data) {
        this.data = data;
    }

    public MultiTimestampPutBatch(List> values) {
        this.data = listToMultiMap(values);
    }

    private Multimap listToMultiMap(List> values) {
        Multimap map = ArrayListMultimap.create();
        for (Map.Entry val : values) {
            map.put(val.getKey(), val.getValue());
        }
        return map;
    }

    @Override
    public InsertValuesStep4 addValuesForInsert(
            InsertValuesStep4 query) {
        for (Map.Entry entry : data.entries()) {
            query = query.values(
                    entry.getKey().getRowName(),
                    entry.getKey().getColumnName(),
                    entry.getValue().getTimestamp(),
                    entry.getValue().getContents());
        }
        return query;
    }

    @Override
    public Collection> getRowsForSelect() {
        return Collections2.transform(
                data.entries(),
                entry -> DSL.row(
                        entry.getKey().getRowName(),
                        entry.getKey().getColumnName(),
                        entry.getValue().getTimestamp()));
    }

    @Override
    @Nullable
    public PutBatch getNextBatch(Result existingRecords) {
        Map existing = Maps.newHashMapWithExpectedSize(existingRecords.size());
        for (Record record : existingRecords) {
            existing.put(
                    new CellTimestamp(
                            record.getValue(JdbcConstants.A_ROW_NAME),
                            record.getValue(JdbcConstants.A_COL_NAME),
                            record.getValue(JdbcConstants.A_TIMESTAMP)),
                    record.getValue(JdbcConstants.A_VALUE));
        }
        Multimap nextBatch = ArrayListMultimap.create();
        for (Map.Entry entry : data.entries()) {
            Cell cell = entry.getKey();
            Value newValue = entry.getValue();
            byte[] oldValue =
                    existing.get(new CellTimestamp(cell.getRowName(), cell.getColumnName(), newValue.getTimestamp()));
            if (oldValue == null) {
                nextBatch.put(cell, newValue);
            } else if (!Arrays.equals(oldValue, newValue.getContents())) {
                return null;
            }
        }
        return new MultiTimestampPutBatch(nextBatch);
    }
}