| /* |
| * 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. |
| */ |
| |
| package org.apache.druid.segment; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Iterables; |
| import org.apache.druid.collections.bitmap.ConciseBitmapFactory; |
| import org.apache.druid.java.util.common.FileUtils; |
| import org.apache.druid.java.util.common.Intervals; |
| import org.apache.druid.query.aggregation.AggregatorFactory; |
| import org.apache.druid.segment.column.ColumnHolder; |
| import org.apache.druid.segment.incremental.IncrementalIndex; |
| import org.apache.druid.segment.incremental.IncrementalIndexAdapter; |
| import org.apache.druid.segment.writeout.OffHeapMemorySegmentWriteOutMediumFactory; |
| import org.apache.druid.segment.writeout.SegmentWriteOutMediumFactory; |
| import org.apache.druid.segment.writeout.TmpFileSegmentWriteOutMediumFactory; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| import java.io.File; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| @RunWith(Parameterized.class) |
| public class EmptyIndexTest |
| { |
| |
| @Parameterized.Parameters |
| public static Collection<?> constructorFeeder() |
| { |
| return ImmutableList.of( |
| new Object[] {TmpFileSegmentWriteOutMediumFactory.instance()}, |
| new Object[] {OffHeapMemorySegmentWriteOutMediumFactory.instance()} |
| ); |
| } |
| |
| private final SegmentWriteOutMediumFactory segmentWriteOutMediumFactory; |
| |
| public EmptyIndexTest(SegmentWriteOutMediumFactory segmentWriteOutMediumFactory) |
| { |
| this.segmentWriteOutMediumFactory = segmentWriteOutMediumFactory; |
| } |
| |
| @Test |
| public void testEmptyIndex() throws Exception |
| { |
| File tmpDir = File.createTempFile("emptyIndex", ""); |
| if (!tmpDir.delete()) { |
| throw new IllegalStateException("tmp delete failed"); |
| } |
| if (!tmpDir.mkdir()) { |
| throw new IllegalStateException("tmp mkdir failed"); |
| } |
| |
| try { |
| IncrementalIndex emptyIndex = new IncrementalIndex.Builder() |
| .setSimpleTestingIndexSchema(/* empty */) |
| .setMaxRowCount(1000) |
| .buildOnheap(); |
| |
| IncrementalIndexAdapter emptyIndexAdapter = new IncrementalIndexAdapter( |
| Intervals.of("2012-08-01/P3D"), |
| emptyIndex, |
| new ConciseBitmapFactory() |
| ); |
| TestHelper.getTestIndexMergerV9(segmentWriteOutMediumFactory).merge( |
| Collections.singletonList(emptyIndexAdapter), |
| true, |
| new AggregatorFactory[0], |
| tmpDir, |
| new IndexSpec() |
| ); |
| |
| QueryableIndex emptyQueryableIndex = TestHelper.getTestIndexIO().loadIndex(tmpDir); |
| |
| Assert.assertEquals("getDimensionNames", 0, Iterables.size(emptyQueryableIndex.getAvailableDimensions())); |
| Assert.assertEquals("getMetricNames", 0, emptyQueryableIndex.getColumnNames().size()); |
| Assert.assertEquals("getDataInterval", Intervals.of("2012-08-01/P3D"), emptyQueryableIndex.getDataInterval()); |
| Assert.assertEquals( |
| "getReadOnlyTimestamps", |
| 0, |
| emptyQueryableIndex.getColumnHolder(ColumnHolder.TIME_COLUMN_NAME).getLength() |
| ); |
| } |
| finally { |
| FileUtils.deleteDirectory(tmpDir); |
| } |
| } |
| } |