com.linkedin.pinot.core.data.readers.PinotSegmentUtil.java Source code

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Here is the source code for com.linkedin.pinot.core.data.readers.PinotSegmentUtil.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * 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.linkedin.pinot.core.data.readers;

import com.linkedin.pinot.common.data.FieldSpec;
import com.linkedin.pinot.common.data.Schema;
import com.linkedin.pinot.core.data.GenericRow;
import com.linkedin.pinot.core.indexsegment.generator.SegmentGeneratorConfig;
import com.linkedin.pinot.core.segment.creator.impl.SegmentIndexCreationDriverImpl;
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import org.apache.commons.lang3.RandomStringUtils;

/**
 * Util class for pinot segment
 */
public class PinotSegmentUtil {
    private static int DEFAULT_NUM_MULTIVALUE = 5;
    private static int DEFAULT_STRING_VALUE_LENGTH = 2;

    private PinotSegmentUtil() {
    }

    public static List<GenericRow> createTestData(Schema schema, int numRows) {
        List<GenericRow> rows = new ArrayList<>();
        final Random random = new Random();
        Map<String, Object> fields;
        for (int i = 0; i < numRows; i++) {
            fields = new HashMap<>();
            for (FieldSpec fieldSpec : schema.getAllFieldSpecs()) {
                Object value;
                if (fieldSpec.isSingleValueField()) {
                    value = generateSingleValue(random, fieldSpec.getDataType());
                } else {
                    value = generateMultiValue(random, fieldSpec.getDataType());
                }
                fields.put(fieldSpec.getName(), value);
            }
            GenericRow row = new GenericRow();
            row.init(fields);
            rows.add(row);
        }
        return rows;
    }

    static boolean compareMultiValueColumn(Object value1, Object value2) {
        Object[] value1Array = (Object[]) value1;
        Object[] value2Array = (Object[]) value2;
        Set<Object> value1Set = new HashSet<>(Arrays.asList(value1Array));
        Set<Object> value2Set = new HashSet<>(Arrays.asList(value2Array));
        return value1Set.containsAll(value2Set);
    }

    static File createSegment(Schema schema, String segmentName, String segmentOutputDir, RecordReader recordReader)
            throws Exception {
        SegmentGeneratorConfig segmentGeneratorConfig = new SegmentGeneratorConfig(schema);
        segmentGeneratorConfig.setTableName(segmentName);
        segmentGeneratorConfig.setOutDir(segmentOutputDir);
        segmentGeneratorConfig.setSegmentName(segmentName);

        SegmentIndexCreationDriverImpl driver = new SegmentIndexCreationDriverImpl();
        driver.init(segmentGeneratorConfig, recordReader);
        driver.build();
        File segmentIndexDir = new File(segmentOutputDir, segmentName);

        if (!segmentIndexDir.exists()) {
            throw new IllegalStateException("Segment generation failed");
        }

        return segmentIndexDir;
    }

    private static Object generateSingleValue(Random random, FieldSpec.DataType dataType) {
        switch (dataType) {
        case INT:
            return Math.abs(random.nextInt());
        case LONG:
            return Math.abs(random.nextLong());
        case FLOAT:
            return Math.abs(random.nextFloat());
        case DOUBLE:
            return Math.abs(random.nextDouble());
        case STRING:
            return RandomStringUtils.randomAlphabetic(DEFAULT_STRING_VALUE_LENGTH);
        default:
            throw new IllegalStateException("Illegal data type");
        }
    }

    private static Object[] generateMultiValue(Random random, FieldSpec.DataType dataType) {
        Object[] value = new Object[DEFAULT_NUM_MULTIVALUE];
        for (int i = 0; i < DEFAULT_NUM_MULTIVALUE; i++) {
            value[i] = generateSingleValue(random, dataType);
        }
        return value;
    }
}