Java tutorial
/** * 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.segments.v1.creator; import java.io.File; import java.util.Map; import java.util.concurrent.TimeUnit; import org.apache.avro.Schema.Field; import org.apache.avro.file.DataFileStream; import org.apache.avro.generic.GenericRecord; import org.apache.commons.io.FileUtils; import org.testng.Assert; import org.testng.annotations.AfterClass; import org.testng.annotations.BeforeClass; import org.testng.annotations.Test; import com.linkedin.pinot.common.segment.ReadMode; import com.linkedin.pinot.core.indexsegment.columnar.ColumnarSegmentLoader; import com.linkedin.pinot.core.indexsegment.generator.SegmentGeneratorConfig; import com.linkedin.pinot.core.indexsegment.utils.AvroUtils; import com.linkedin.pinot.core.io.reader.DataFileReader; import com.linkedin.pinot.core.io.reader.SingleColumnMultiValueReader; import com.linkedin.pinot.core.io.reader.SingleColumnSingleValueReader; import com.linkedin.pinot.core.segment.creator.SegmentIndexCreationDriver; import com.linkedin.pinot.core.segment.creator.impl.SegmentCreationDriverFactory; import com.linkedin.pinot.core.segment.index.ColumnMetadata; import com.linkedin.pinot.core.segment.index.IndexSegmentImpl; import com.linkedin.pinot.core.segment.index.SegmentMetadataImpl; import com.linkedin.pinot.util.TestUtils; public class IntArraysTest { private static final String AVRO_DATA = "data/test_data-mv.avro"; private static File INDEX_DIR = new File( FileUtils.getTempDirectory() + File.separator + IntArraysTest.class.getName()); @AfterClass public static void cleanup() { FileUtils.deleteQuietly(INDEX_DIR); } @BeforeClass public static void before() throws Exception { final String filePath = TestUtils .getFileFromResourceUrl(DictionariesTest.class.getClassLoader().getResource(AVRO_DATA)); if (INDEX_DIR.exists()) { FileUtils.deleteQuietly(INDEX_DIR); } System.out.println(INDEX_DIR.getAbsolutePath()); final SegmentIndexCreationDriver driver = SegmentCreationDriverFactory.get(null); final SegmentGeneratorConfig config = SegmentTestUtils.getSegmentGenSpecWithSchemAndProjectedColumns( new File(filePath), INDEX_DIR, "weeksSinceEpochSunday", TimeUnit.DAYS, "test"); config.setTimeColumnName("weeksSinceEpochSunday"); driver.init(config); driver.build(); final DataFileStream<GenericRecord> avroReader = AvroUtils.getAvroReader(new File(filePath)); final org.apache.avro.Schema avroSchema = avroReader.getSchema(); final String[] columns = new String[avroSchema.getFields().size()]; int i = 0; for (final Field f : avroSchema.getFields()) { columns[i] = f.name(); i++; } } @Test public void test1() throws Exception { final IndexSegmentImpl heapSegment = (IndexSegmentImpl) ColumnarSegmentLoader.load(INDEX_DIR.listFiles()[0], ReadMode.heap); final IndexSegmentImpl mmapSegment = (IndexSegmentImpl) ColumnarSegmentLoader.load(INDEX_DIR.listFiles()[0], ReadMode.mmap); final Map<String, ColumnMetadata> metadataMap = ((SegmentMetadataImpl) heapSegment.getSegmentMetadata()) .getColumnMetadataMap(); for (final String column : metadataMap.keySet()) { final DataFileReader heapArray = heapSegment.getForwardIndexReaderFor(column); final DataFileReader mmapArray = mmapSegment.getForwardIndexReaderFor(column); if (metadataMap.get(column).isSingleValue()) { final SingleColumnSingleValueReader svHeapReader = (SingleColumnSingleValueReader) heapArray; final SingleColumnSingleValueReader mvMmapReader = (SingleColumnSingleValueReader) mmapArray; for (int i = 0; i < metadataMap.get(column).getTotalDocs(); i++) { Assert.assertEquals(mvMmapReader.getInt(i), svHeapReader.getInt(i)); } } else { final SingleColumnMultiValueReader svHeapReader = (SingleColumnMultiValueReader) heapArray; final SingleColumnMultiValueReader mvMmapReader = (SingleColumnMultiValueReader) mmapArray; for (int i = 0; i < metadataMap.get(column).getTotalDocs(); i++) { final int[] i_1 = new int[1000]; final int[] j_i = new int[1000]; Assert.assertEquals(mvMmapReader.getIntArray(i, j_i), svHeapReader.getIntArray(i, i_1)); } } } } }