/**
*
* 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.hadoop.hbase.io.hfile;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Random;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValue.KVComparator;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
import org.apache.hadoop.hbase.io.hfile.HFile.FileInfo;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Writables;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.WritableUtils;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
/**
* Testing writing a version 3 {@link HFile}. This is a low-level test written
* during the development of {@link HFileWriterV3}.
*/
@RunWith(Parameterized.class)
@Category(SmallTests.class)
public class TestHFileWriterV3 {
private static final Log LOG = LogFactory.getLog(TestHFileWriterV3.class);
private static final HBaseTestingUtility TEST_UTIL =
new HBaseTestingUtility();
private Configuration conf;
private FileSystem fs;
private boolean useTags;
public TestHFileWriterV3(boolean useTags) {
this.useTags = useTags;
}
@Parameters
public static Collection<Object[]> parameters() {
return HBaseTestingUtility.BOOLEAN_PARAMETERIZED;
}
@Before
public void setUp() throws IOException {
conf = TEST_UTIL.getConfiguration();
fs = FileSystem.get(conf);
}
@Test
public void testHFileFormatV3() throws IOException {
testHFileFormatV3Internals(useTags);
}
private void testHFileFormatV3Internals(boolean useTags) throws IOException {
Path hfilePath = new Path(TEST_UTIL.getDataTestDir(), "testHFileFormatV3");
final Compression.Algorithm compressAlgo = Compression.Algorithm.GZ;
final int entryCount = 10000;
writeDataAndReadFromHFile(hfilePath, compressAlgo, entryCount, false, useTags);
}
@Test
public void testMidKeyInHFile() throws IOException{
testMidKeyInHFileInternals(useTags);
}
private void testMidKeyInHFileInternals(boolean useTags) throws IOException {
Path hfilePath = new Path(TEST_UTIL.getDataTestDir(),
"testMidKeyInHFile");
Compression.Algorithm compressAlgo = Compression.Algorithm.NONE;
int entryCount = 50000;
writeDataAndReadFromHFile(hfilePath, compressAlgo, entryCount, true, useTags);
}
private void writeDataAndReadFromHFile(Path hfilePath,
Algorithm compressAlgo, int entryCount, boolean findMidKey, boolean useTags) throws IOException {
HFileContext context = new HFileContextBuilder()
.withBlockSize(4096)
.withIncludesTags(useTags)
.withCompression(compressAlgo).build();
HFileWriterV3 writer = (HFileWriterV3)
new HFileWriterV3.WriterFactoryV3(conf, new CacheConfig(conf))
.withPath(fs, hfilePath)
.withFileContext(context)
.withComparator(KeyValue.COMPARATOR)
.create();
Random rand = new Random(9713312); // Just a fixed seed.
List<KeyValue> keyValues = new ArrayList<KeyValue>(entryCount);
for (int i = 0; i < entryCount; ++i) {
byte[] keyBytes = TestHFileWriterV2.randomOrderedKey(rand, i);
// A random-length random value.
byte[] valueBytes = TestHFileWriterV2.randomValue(rand);
KeyValue keyValue = null;
if (useTags) {
ArrayList<Tag> tags = new ArrayList<Tag>();
for (int j = 0; j < 1 + rand.nextInt(4); j++) {
byte[] tagBytes = new byte[16];
rand.nextBytes(tagBytes);
tags.add(new Tag((byte) 1, tagBytes));
}
keyValue = new KeyValue(keyBytes, null, null, HConstants.LATEST_TIMESTAMP,
valueBytes, tags);
} else {
keyValue = new KeyValue(keyBytes, null, null, HConstants.LATEST_TIMESTAMP,
valueBytes);
}
writer.append(keyValue);
keyValues.add(keyValue);
}
// Add in an arbitrary order. They will be sorted lexicographically by
// the key.
writer.appendMetaBlock("CAPITAL_OF_USA", new Text("Washington, D.C."));
writer.appendMetaBlock("CAPITAL_OF_RUSSIA", new Text("Moscow"));
writer.appendMetaBlock("CAPITAL_OF_FRANCE", new Text("Paris"));
writer.close();
FSDataInputStream fsdis = fs.open(hfilePath);
long fileSize = fs.getFileStatus(hfilePath).getLen();
FixedFileTrailer trailer =
FixedFileTrailer.readFromStream(fsdis, fileSize);
assertEquals(3, trailer.getMajorVersion());
assertEquals(entryCount, trailer.getEntryCount());
HFileContext meta = new HFileContextBuilder()
.withCompression(compressAlgo)
.withIncludesMvcc(false)
.withIncludesTags(useTags)
.withHBaseCheckSum(true).build();
HFileBlock.FSReader blockReader =
new HFileBlock.FSReaderImpl(fsdis, fileSize, meta);
// Comparator class name is stored in the trailer in version 2.
KVComparator comparator = trailer.createComparator();
HFileBlockIndex.BlockIndexReader dataBlockIndexReader =
new HFileBlockIndex.BlockIndexReader(comparator,
trailer.getNumDataIndexLevels());
HFileBlockIndex.BlockIndexReader metaBlockIndexReader =
new HFileBlockIndex.BlockIndexReader(
KeyValue.RAW_COMPARATOR, 1);
HFileBlock.BlockIterator blockIter = blockReader.blockRange(
trailer.getLoadOnOpenDataOffset(),
fileSize - trailer.getTrailerSize());
// Data index. We also read statistics about the block index written after
// the root level.
dataBlockIndexReader.readMultiLevelIndexRoot(
blockIter.nextBlockWithBlockType(BlockType.ROOT_INDEX), trailer.getDataIndexCount());
if (findMidKey) {
byte[] midkey = dataBlockIndexReader.midkey();
assertNotNull("Midkey should not be null", midkey);
}
// Meta index.
metaBlockIndexReader.readRootIndex(
blockIter.nextBlockWithBlockType(BlockType.ROOT_INDEX)
.getByteStream(), trailer.getMetaIndexCount());
// File info
FileInfo fileInfo = new FileInfo();
fileInfo.read(blockIter.nextBlockWithBlockType(BlockType.FILE_INFO).getByteStream());
byte [] keyValueFormatVersion = fileInfo.get(
HFileWriterV3.KEY_VALUE_VERSION);
boolean includeMemstoreTS = keyValueFormatVersion != null &&
Bytes.toInt(keyValueFormatVersion) > 0;
// Counters for the number of key/value pairs and the number of blocks
int entriesRead = 0;
int blocksRead = 0;
long memstoreTS = 0;
// Scan blocks the way the reader would scan them
fsdis.seek(0);
long curBlockPos = 0;
while (curBlockPos <= trailer.getLastDataBlockOffset()) {
HFileBlock block = blockReader.readBlockData(curBlockPos, -1, -1, false)
.unpack(context, blockReader);
assertEquals(BlockType.DATA, block.getBlockType());
ByteBuffer buf = block.getBufferWithoutHeader();
int keyLen = -1;
while (buf.hasRemaining()) {
keyLen = buf.getInt();
int valueLen = buf.getInt();
byte[] key = new byte[keyLen];
buf.get(key);
byte[] value = new byte[valueLen];
buf.get(value);
byte[] tagValue = null;
if (useTags) {
int tagLen = ((buf.get() & 0xff) << 8) ^ (buf.get() & 0xff);
tagValue = new byte[tagLen];
buf.get(tagValue);
}
if (includeMemstoreTS) {
ByteArrayInputStream byte_input = new ByteArrayInputStream(buf.array(), buf.arrayOffset()
+ buf.position(), buf.remaining());
DataInputStream data_input = new DataInputStream(byte_input);
memstoreTS = WritableUtils.readVLong(data_input);
buf.position(buf.position() + WritableUtils.getVIntSize(memstoreTS));
}
// A brute-force check to see that all keys and values are correct.
assertTrue(Bytes.compareTo(key, keyValues.get(entriesRead).getKey()) == 0);
assertTrue(Bytes.compareTo(value, keyValues.get(entriesRead).getValue()) == 0);
if (useTags) {
assertNotNull(tagValue);
KeyValue tkv = keyValues.get(entriesRead);
assertEquals(tagValue.length, tkv.getTagsLength());
assertTrue(Bytes.compareTo(tagValue, 0, tagValue.length, tkv.getTagsArray(),
tkv.getTagsOffset(), tkv.getTagsLength()) == 0);
}
++entriesRead;
}
++blocksRead;
curBlockPos += block.getOnDiskSizeWithHeader();
}
LOG.info("Finished reading: entries=" + entriesRead + ", blocksRead="
+ blocksRead);
assertEquals(entryCount, entriesRead);
// Meta blocks. We can scan until the load-on-open data offset (which is
// the root block index offset in version 2) because we are not testing
// intermediate-level index blocks here.
int metaCounter = 0;
while (fsdis.getPos() < trailer.getLoadOnOpenDataOffset()) {
LOG.info("Current offset: " + fsdis.getPos() + ", scanning until " +
trailer.getLoadOnOpenDataOffset());
HFileBlock block = blockReader.readBlockData(curBlockPos, -1, -1, false)
.unpack(context, blockReader);
assertEquals(BlockType.META, block.getBlockType());
Text t = new Text();
ByteBuffer buf = block.getBufferWithoutHeader();
if (Writables.getWritable(buf.array(), buf.arrayOffset(), buf.limit(), t) == null) {
throw new IOException("Failed to deserialize block " + this + " into a " + t.getClass().getSimpleName());
}
Text expectedText =
(metaCounter == 0 ? new Text("Paris") : metaCounter == 1 ? new Text(
"Moscow") : new Text("Washington, D.C."));
assertEquals(expectedText, t);
LOG.info("Read meta block data: " + t);
++metaCounter;
curBlockPos += block.getOnDiskSizeWithHeader();
}
fsdis.close();
}
}