/* This file is part of VoltDB.
* Copyright (C) 2008-2014 VoltDB Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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*/
package org.voltcore.utils;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.security.SecureRandom;
import java.util.Random;
import junit.framework.TestCase;
import org.apache.cassandra_voltpatches.MurmurHash3;
import org.junit.Test;
import org.voltcore.utils.DBBPool.BBContainer;
import org.voltdb.EELibraryLoader;
import org.voltdb.utils.Encoder;
public class TestMurmur3 extends TestCase {
final long iterations = 300000;
final int maxLength = 4096;
@Test
public void testMatchesNativeLongs() throws Exception {
final long seed = ByteBuffer.wrap(SecureRandom.getSeed(8)).getInt();
Random r = new Random(seed);
System.out.println("Seed is " + seed);
EELibraryLoader.loadExecutionEngineLibrary(true);
for (int ii = 0; ii < iterations; ii++) {
final long nextValue = r.nextLong();
long nativeHash = DBBPool.getMurmur3128(nextValue);
long javaHash = MurmurHash3.hash3_x64_128(nextValue);
if (nativeHash != javaHash) {
fail("Failed in iteration " + ii + " native hash " + Long.toHexString(nativeHash) +
" java hash " + Long.toHexString(javaHash) +" with value " + nextValue);
}
}
}
@Test
public void testMatchesNativeBytes() throws Exception {
final long seed = ByteBuffer.wrap(SecureRandom.getSeed(8)).getInt();
Random r = new Random(seed);
System.out.println("Seed is " + seed);
EELibraryLoader.loadExecutionEngineLibrary(true);
BBContainer c = DBBPool.allocateDirect(4096);
try {
c.b().order(ByteOrder.LITTLE_ENDIAN);
for (int ii = 0; ii < iterations; ii++) {
int bytesToFill = r.nextInt(maxLength + 1);
byte bytes[] = new byte[bytesToFill];
r.nextBytes(bytes);
c.b().clear();
c.b().put(bytes);
c.b().flip();
long nativeHash = DBBPool.getMurmur3128(c.address(), 0, bytesToFill);
long javaHash = MurmurHash3.hash3_x64_128(c.b(), 0, bytesToFill, 0);
if (nativeHash != javaHash) {
fail("Failed in iteration " + ii + " native hash " + Long.toHexString(nativeHash) +
" java hash " + Long.toHexString(javaHash) +" with bytes " + Encoder.base64Encode(bytes));
}
}
} finally {
c.discard();
}
}
}