/**
*
* 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 java.io.IOException;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HBaseTestCase;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValueUtil;
import org.apache.hadoop.hbase.SmallTests;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.experimental.categories.Category;
/**
* Test {@link HFileScanner#seekTo(byte[])} and its variants.
*/
@Category(SmallTests.class)
public class TestSeekTo extends HBaseTestCase {
static boolean switchKVs = false;
static KeyValue toKV(String row, TagUsage tagUsage) {
if (tagUsage == TagUsage.NO_TAG) {
return new KeyValue(Bytes.toBytes(row), Bytes.toBytes("family"), Bytes.toBytes("qualifier"),
Bytes.toBytes("value"));
} else if (tagUsage == TagUsage.ONLY_TAG) {
Tag t = new Tag((byte) 1, "myTag1");
Tag[] tags = new Tag[1];
tags[0] = t;
return new KeyValue(Bytes.toBytes(row), Bytes.toBytes("family"), Bytes.toBytes("qualifier"),
HConstants.LATEST_TIMESTAMP, Bytes.toBytes("value"), tags);
} else {
if (!switchKVs) {
switchKVs = true;
return new KeyValue(Bytes.toBytes(row), Bytes.toBytes("family"),
Bytes.toBytes("qualifier"), Bytes.toBytes("value"));
} else {
switchKVs = false;
Tag t = new Tag((byte) 1, "myTag1");
Tag[] tags = new Tag[1];
tags[0] = t;
return new KeyValue(Bytes.toBytes(row), Bytes.toBytes("family"),
Bytes.toBytes("qualifier"), HConstants.LATEST_TIMESTAMP, Bytes.toBytes("value"), tags);
}
}
}
static String toRowStr(Cell kv) {
return Bytes.toString(KeyValueUtil.ensureKeyValue(kv).getRow());
}
Path makeNewFile(TagUsage tagUsage) throws IOException {
Path ncTFile = new Path(this.testDir, "basic.hfile");
if (tagUsage != TagUsage.NO_TAG) {
conf.setInt("hfile.format.version", 3);
} else {
conf.setInt("hfile.format.version", 2);
}
FSDataOutputStream fout = this.fs.create(ncTFile);
int blocksize = toKV("a", tagUsage).getLength() * 3;
HFileContext context = new HFileContextBuilder().withBlockSize(blocksize)
.withIncludesTags(true).build();
HFile.Writer writer = HFile.getWriterFactoryNoCache(conf).withOutputStream(fout)
.withFileContext(context)
.withComparator(KeyValue.COMPARATOR).create();
// 4 bytes * 3 * 2 for each key/value +
// 3 for keys, 15 for values = 42 (woot)
writer.append(toKV("c", tagUsage));
writer.append(toKV("e", tagUsage));
writer.append(toKV("g", tagUsage));
// block transition
writer.append(toKV("i", tagUsage));
writer.append(toKV("k", tagUsage));
writer.close();
fout.close();
return ncTFile;
}
public void testSeekBefore() throws Exception {
testSeekBeforeInternals(TagUsage.NO_TAG);
testSeekBeforeInternals(TagUsage.ONLY_TAG);
testSeekBeforeInternals(TagUsage.PARTIAL_TAG);
}
protected void testSeekBeforeInternals(TagUsage tagUsage) throws IOException {
Path p = makeNewFile(tagUsage);
HFile.Reader reader = HFile.createReader(fs, p, new CacheConfig(conf), conf);
reader.loadFileInfo();
HFileScanner scanner = reader.getScanner(false, true);
assertEquals(false, scanner.seekBefore(toKV("a", tagUsage)));
assertEquals(false, scanner.seekBefore(toKV("c", tagUsage)));
assertEquals(true, scanner.seekBefore(toKV("d", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("e", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("f", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("g", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("h", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("i", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("j", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("k", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
assertEquals(true, scanner.seekBefore(toKV("l", tagUsage)));
assertEquals("k", toRowStr(scanner.getKeyValue()));
reader.close();
}
public void testSeekBeforeWithReSeekTo() throws Exception {
testSeekBeforeWithReSeekToInternals(TagUsage.NO_TAG);
testSeekBeforeWithReSeekToInternals(TagUsage.ONLY_TAG);
testSeekBeforeWithReSeekToInternals(TagUsage.PARTIAL_TAG);
}
protected void testSeekBeforeWithReSeekToInternals(TagUsage tagUsage) throws IOException {
Path p = makeNewFile(tagUsage);
HFile.Reader reader = HFile.createReader(fs, p, new CacheConfig(conf), conf);
reader.loadFileInfo();
HFileScanner scanner = reader.getScanner(false, true);
assertEquals(false, scanner.seekBefore(toKV("a", tagUsage)));
assertEquals(false, scanner.seekBefore(toKV("b", tagUsage)));
assertEquals(false, scanner.seekBefore(toKV("c", tagUsage)));
// seekBefore d, so the scanner points to c
assertEquals(true, scanner.seekBefore(toKV("d", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
// reseekTo e and g
assertEquals(0, scanner.reseekTo(toKV("c", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore e, so the scanner points to c
assertEquals(true, scanner.seekBefore(toKV("e", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
// reseekTo e and g
assertEquals(0, scanner.reseekTo(toKV("e", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore f, so the scanner points to e
assertEquals(true, scanner.seekBefore(toKV("f", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
// reseekTo e and g
assertEquals(0, scanner.reseekTo(toKV("e", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore g, so the scanner points to e
assertEquals(true, scanner.seekBefore(toKV("g", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
// reseekTo e and g again
assertEquals(0, scanner.reseekTo(toKV("e", tagUsage)));
assertEquals("e", toRowStr(scanner.getKeyValue()));
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore h, so the scanner points to g
assertEquals(true, scanner.seekBefore(toKV("h", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// reseekTo g
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore i, so the scanner points to g
assertEquals(true, scanner.seekBefore(toKV("i", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// reseekTo g
assertEquals(0, scanner.reseekTo(toKV("g", tagUsage)));
assertEquals("g", toRowStr(scanner.getKeyValue()));
// seekBefore j, so the scanner points to i
assertEquals(true, scanner.seekBefore(toKV("j", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
// reseekTo i
assertEquals(0, scanner.reseekTo(toKV("i", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
// seekBefore k, so the scanner points to i
assertEquals(true, scanner.seekBefore(toKV("k", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
// reseekTo i and k
assertEquals(0, scanner.reseekTo(toKV("i", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
assertEquals(0, scanner.reseekTo(toKV("k", tagUsage)));
assertEquals("k", toRowStr(scanner.getKeyValue()));
// seekBefore l, so the scanner points to k
assertEquals(true, scanner.seekBefore(toKV("l", tagUsage)));
assertEquals("k", toRowStr(scanner.getKeyValue()));
// reseekTo k
assertEquals(0, scanner.reseekTo(toKV("k", tagUsage)));
assertEquals("k", toRowStr(scanner.getKeyValue()));
}
public void testSeekTo() throws Exception {
testSeekToInternals(TagUsage.NO_TAG);
testSeekToInternals(TagUsage.ONLY_TAG);
testSeekToInternals(TagUsage.PARTIAL_TAG);
}
protected void testSeekToInternals(TagUsage tagUsage) throws IOException {
Path p = makeNewFile(tagUsage);
HFile.Reader reader = HFile.createReader(fs, p, new CacheConfig(conf), conf);
reader.loadFileInfo();
assertEquals(2, reader.getDataBlockIndexReader().getRootBlockCount());
HFileScanner scanner = reader.getScanner(false, true);
// lies before the start of the file.
assertEquals(-1, scanner.seekTo(toKV("a", tagUsage)));
assertEquals(1, scanner.seekTo(toKV("d", tagUsage)));
assertEquals("c", toRowStr(scanner.getKeyValue()));
// Across a block boundary now.
// h goes to the next block
assertEquals(-2, scanner.seekTo(toKV("h", tagUsage)));
assertEquals("i", toRowStr(scanner.getKeyValue()));
assertEquals(1, scanner.seekTo(toKV("l", tagUsage)));
assertEquals("k", toRowStr(scanner.getKeyValue()));
reader.close();
}
public void testBlockContainingKey() throws Exception {
testBlockContainingKeyInternals(TagUsage.NO_TAG);
testBlockContainingKeyInternals(TagUsage.ONLY_TAG);
testBlockContainingKeyInternals(TagUsage.PARTIAL_TAG);
}
protected void testBlockContainingKeyInternals(TagUsage tagUsage) throws IOException {
Path p = makeNewFile(tagUsage);
HFile.Reader reader = HFile.createReader(fs, p, new CacheConfig(conf), conf);
reader.loadFileInfo();
HFileBlockIndex.BlockIndexReader blockIndexReader =
reader.getDataBlockIndexReader();
System.out.println(blockIndexReader.toString());
int klen = toKV("a", tagUsage).getKey().length;
// falls before the start of the file.
assertEquals(-1, blockIndexReader.rootBlockContainingKey(
toKV("a", tagUsage)));
assertEquals(0, blockIndexReader.rootBlockContainingKey(
toKV("c", tagUsage)));
assertEquals(0, blockIndexReader.rootBlockContainingKey(
toKV("d", tagUsage)));
assertEquals(0, blockIndexReader.rootBlockContainingKey(
toKV("e", tagUsage)));
assertEquals(0, blockIndexReader.rootBlockContainingKey(
toKV("g", tagUsage)));
assertEquals(1, blockIndexReader.rootBlockContainingKey(
toKV("h", tagUsage)));
assertEquals(1, blockIndexReader.rootBlockContainingKey(
toKV("i", tagUsage)));
assertEquals(1, blockIndexReader.rootBlockContainingKey(
toKV("j", tagUsage)));
assertEquals(1, blockIndexReader.rootBlockContainingKey(
toKV("k", tagUsage)));
assertEquals(1, blockIndexReader.rootBlockContainingKey(
toKV("l", tagUsage)));
reader.close();
}
}