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A java client for github.com/antirez/redis, a fork of github.com/xetorthio/jedis

There is a newer version: 2.10.1

package redis.clients.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public interface Hashing {
  public static final Hashing MURMUR_HASH = new MurmurHash();
  public ThreadLocal md5Holder = new ThreadLocal();

  public static final Hashing MD5 = new Hashing() {
    @Override
    public long hash(String key) {
      return hash(SafeEncoder.encode(key));
    }

    @Override
    public long hash(byte[] key) {
      try {
        if (md5Holder.get() == null) {
          md5Holder.set(MessageDigest.getInstance("MD5"));
        }
      } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException("++++ no md5 algorythm found");
      }
      MessageDigest md5 = md5Holder.get();

      md5.reset();
      md5.update(key);
      byte[] bKey = md5.digest();
      long res = ((long) (bKey[3] & 0xFF) << 24) | ((long) (bKey[2] & 0xFF) << 16)
          | ((long) (bKey[1] & 0xFF) << 8) | (long) (bKey[0] & 0xFF);
      return res;
    }
  };

  public long hash(String key);

  public long hash(byte[] key);
}