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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.cassandra.io.sstable;
import java.io.IOException;
import java.util.*;
import org.junit.Test;
import org.apache.cassandra.CleanupHelper;
import org.apache.cassandra.io.util.BufferedRandomAccessFile;
import org.apache.cassandra.utils.FBUtilities;
public class SSTableTest extends CleanupHelper
{
@Test
public void testSingleWrite() throws IOException {
// write test data
byte[] key = Integer.toString(1).getBytes();
byte[] bytes = new byte[1024];
new Random().nextBytes(bytes);
Map<byte[], byte[]> map = new HashMap<byte[],byte[]>();
map.put(key, bytes);
SSTableReader ssTable = SSTableUtils.writeRawSSTable("Keyspace1", "Standard1", map);
// verify
verifySingle(ssTable, bytes, key);
ssTable = SSTableReader.open(ssTable.getDescriptor()); // read the index from disk
verifySingle(ssTable, bytes, key);
}
private void verifySingle(SSTableReader sstable, byte[] bytes, byte[] key) throws IOException
{
BufferedRandomAccessFile file = new BufferedRandomAccessFile(sstable.getFilename(), "r");
file.seek(sstable.getPosition(sstable.partitioner.decorateKey(key), SSTableReader.Operator.EQ));
assert Arrays.equals(key, FBUtilities.readShortByteArray(file));
int size = (int)SSTableReader.readRowSize(file, sstable.getDescriptor());
byte[] bytes2 = new byte[size];
file.readFully(bytes2);
assert Arrays.equals(bytes2, bytes);
}
@Test
public void testManyWrites() throws IOException {
Map<byte[], byte[]> map = new HashMap<byte[],byte[]>();
for (int i = 100; i < 1000; ++i)
{
map.put(Integer.toString(i).getBytes(), ("Avinash Lakshman is a good man: " + i).getBytes());
}
// write
SSTableReader ssTable = SSTableUtils.writeRawSSTable("Keyspace1", "Standard2", map);
// verify
verifyMany(ssTable, map);
ssTable = SSTableReader.open(ssTable.getDescriptor()); // read the index from disk
verifyMany(ssTable, map);
}
private void verifyMany(SSTableReader sstable, Map<byte[], byte[]> map) throws IOException
{
List<byte[]> keys = new ArrayList<byte[]>(map.keySet());
Collections.shuffle(keys);
BufferedRandomAccessFile file = new BufferedRandomAccessFile(sstable.getFilename(), "r");
for (byte[] key : keys)
{
file.seek(sstable.getPosition(sstable.partitioner.decorateKey(key), SSTableReader.Operator.EQ));
assert Arrays.equals(key, FBUtilities.readShortByteArray(file));
int size = (int)SSTableReader.readRowSize(file, sstable.getDescriptor());
byte[] bytes2 = new byte[size];
file.readFully(bytes2);
assert Arrays.equals(bytes2, map.get(key));
}
}
}