Example usage for com.google.common.hash Hashing murmur3

Introduction

In this page you can find the example usage for com.google.common.hash Hashing murmur3_32.

Prototype

public static HashFunction murmur3_32()

Source Link

Document

Returns a hash function implementing the <a href="http://smhasher.googlecode.com/svn/trunk/MurmurHash3.cpp"> 32-bit murmur3 algorithm, x86 variant</a> (little-endian variant), using a seed value of zero.

Usage

From source file:net.eusashead.spring.gaecache.Murmur3HashAlgorithm.java

/**
 * Returns a string containing each byte 
 * a Murmurhash3 32 bit hash of this string
 * in order, as a two-digit unsigned hexadecimal 
 * number in lower case/*from   www . j a v a  2  s  .co m*/
 * @param key
 * @return
 */
public String hash(String key) {
    return Hashing.murmur3_32().hashBytes(key.getBytes(Charset.forName("UTF-8"))).toString();
}

From source file:ome.util.checksum.Murmur32ChecksumProviderImpl.java

public Murmur32ChecksumProviderImpl() {
    super(Hashing.murmur3_32());
}

From source file:edu.usc.pgroup.floe.flake.messaging.dispersion.elasticmapreducer.Murmur32.java

/**
 * Constructor.
 */
public Murmur32() {
    hash = Hashing.murmur3_32();
}

From source file:de.greenrobot.common.hash.otherhashes.Murmur3aGuavaChecksum.java

@Override
public void reset() {
    hasher = Hashing.murmur3_32().newHasher();
}

From source file:info.yangguo.dragon.storage.mysql.algorithm.SingleKeyModuloTableShardingAlgorithm.java

@Override
public String doEqualSharding(final Collection<String> availableTargetNames,
        final ShardingValue<String> shardingValue) {
    int index = Hashing.consistentHash(Hashing.murmur3_32().hashBytes(shardingValue.getValue().getBytes()),
            tbSum);//from w w  w .  j  a v a2s .  com
    for (String each : availableTargetNames) {
        if (each.endsWith(index + "")) {
            return each;
        }
    }
    throw new UnsupportedOperationException();
}

From source file:info.yangguo.dragon.storage.mysql.algorithm.SingleKeyModuloDatabaseShardingAlgorithm.java

@Override
public String doEqualSharding(final Collection<String> availableTargetNames,
        final ShardingValue<String> shardingValue) {
    int index = Hashing.consistentHash(Hashing.murmur3_32().hashBytes(shardingValue.getValue().getBytes()),
            dbSum);//from   w ww. j a va2s .c  o m
    for (String each : availableTargetNames) {
        if (each.endsWith(index + "")) {
            return each;
        }
    }
    throw new UnsupportedOperationException();
}

From source file:org.apache.fluo.recipes.core.combine.InitializerImpl.java

public RowColumnValue convert(K key, V val) {
    byte[] k = serializer.serialize(key);
    int hash = Hashing.murmur3_32().hashBytes(k).asInt();
    String bucketId = CombineQueueImpl.genBucketId(Math.abs(hash % numBuckets), numBuckets);

    BytesBuilder bb = Bytes.builder(dataPrefix.length() + bucketId.length() + 1 + k.length);
    Bytes row = bb.append(dataPrefix).append(bucketId).append(':').append(k).toBytes();
    byte[] v = serializer.serialize(val);

    return new RowColumnValue(row, CombineQueueImpl.DATA_COLUMN, Bytes.of(v));
}

From source file:com.shenit.commons.utils.ShortLinkUtils.java

/**
 * Shorten url//ww  w  .j  a  v a  2  s .  com
 * @param url URL that not encoded
 * @param query
 * @return
 */
public static String shorten(String url, String query, Object salt) {
    if (StringUtils.isEmpty(url))
        return null;
    String joinStr = url.indexOf(HttpUtils.QUERY_CHAR) > 0 ? HttpUtils.QUERY_CHAR : HttpUtils.AMP;
    final String queryParams = (query != null) ? joinStr + query : StringUtils.EMPTY;
    String saltStr = DataUtils.toString(salt, StringUtils.EMPTY);
    url = toUrl((url + queryParams));
    return StringUtils.isEmpty(url) ? null
            : Hashing.murmur3_32().hashString(url + HttpUtils.HASH_CHAR + saltStr, StandardCharsets.UTF_8)
                    .toString();
}

From source file:io.airlift.slice.BenchmarkMurmur3Hash32.java

@Benchmark
public int guava(BenchmarkData data, ByteCounter counter) {
    counter.add(data.getSlice().length());
    return Hashing.murmur3_32().hashBytes(data.getBytes()).asInt();
}

From source file:org.apache.jackrabbit.oak.plugins.segment.standby.codec.BlobEncoder.java

@Override
protected void encode(ChannelHandlerContext ctx, Blob b, ByteBuf out) throws Exception {
    byte[] bytes = null;
    InputStream s = b.getNewStream();
    try {//from   w w  w.  java2  s  . c o m
        bytes = IOUtils.toByteArray(s);
    } finally {
        s.close();
    }

    Hasher hasher = Hashing.murmur3_32().newHasher();
    long hash = hasher.putBytes(bytes).hash().padToLong();

    out.writeInt(bytes.length);
    out.writeByte(Messages.HEADER_BLOB);

    String bid = b.getContentIdentity();
    byte[] id = bid.getBytes(Charset.forName("UTF-8"));
    out.writeInt(id.length);
    out.writeBytes(id);

    out.writeLong(hash);
    out.writeBytes(bytes);
}

Example usage for com.google.common.hash Hashing murmur3_32

Introduction

Prototype

Document

Usage