/**
* 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.regionserver.wal;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.io.util.LRUDictionary;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.DataOutputBuffer;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import static org.junit.Assert.*;
import com.google.common.collect.Lists;
@Category({RegionServerTests.class, SmallTests.class})
public class TestKeyValueCompression {
private static final byte[] VALUE = Bytes.toBytes("fake value");
private static final int BUF_SIZE = 256*1024;
@Test
public void testCountingKVs() throws Exception {
List<KeyValue> kvs = Lists.newArrayList();
for (int i = 0; i < 400; i++) {
byte[] row = Bytes.toBytes("row" + i);
byte[] fam = Bytes.toBytes("fam" + i);
byte[] qual = Bytes.toBytes("qual" + i);
kvs.add(new KeyValue(row, fam, qual, 12345L, VALUE));
}
runTestCycle(kvs);
}
@Test
public void testRepeatingKVs() throws Exception {
List<KeyValue> kvs = Lists.newArrayList();
for (int i = 0; i < 400; i++) {
byte[] row = Bytes.toBytes("row" + (i % 10));
byte[] fam = Bytes.toBytes("fam" + (i % 127));
byte[] qual = Bytes.toBytes("qual" + (i % 128));
kvs.add(new KeyValue(row, fam, qual, 12345L, VALUE));
}
runTestCycle(kvs);
}
private void runTestCycle(List<KeyValue> kvs) throws Exception {
CompressionContext ctx = new CompressionContext(LRUDictionary.class, false, false);
DataOutputBuffer buf = new DataOutputBuffer(BUF_SIZE);
for (KeyValue kv : kvs) {
KeyValueCompression.writeKV(buf, kv, ctx);
}
ctx.clear();
DataInputStream in = new DataInputStream(new ByteArrayInputStream(
buf.getData(), 0, buf.getLength()));
for (KeyValue kv : kvs) {
KeyValue readBack = KeyValueCompression.readKV(in, ctx);
assertEquals(kv, readBack);
}
}
@Test
public void testKVWithTags() throws Exception {
CompressionContext ctx = new CompressionContext(LRUDictionary.class, false, false);
DataOutputBuffer buf = new DataOutputBuffer(BUF_SIZE);
KeyValueCompression.writeKV(buf, createKV(1), ctx);
KeyValueCompression.writeKV(buf, createKV(0), ctx);
KeyValueCompression.writeKV(buf, createKV(2), ctx);
ctx.clear();
DataInputStream in = new DataInputStream(new ByteArrayInputStream(
buf.getData(), 0, buf.getLength()));
KeyValue readBack = KeyValueCompression.readKV(in, ctx);
List<Tag> tags = readBack.getTags();
assertEquals(1, tags.size());
}
private KeyValue createKV(int noOfTags) {
byte[] row = Bytes.toBytes("myRow");
byte[] cf = Bytes.toBytes("myCF");
byte[] q = Bytes.toBytes("myQualifier");
byte[] value = Bytes.toBytes("myValue");
List<Tag> tags = new ArrayList<Tag>(noOfTags);
for (int i = 1; i <= noOfTags; i++) {
tags.add(new Tag((byte) i, Bytes.toBytes("tagValue" + i)));
}
return new KeyValue(row, cf, q, HConstants.LATEST_TIMESTAMP, value, tags);
}
}