39 lines
1.2 KiB
Java
39 lines
1.2 KiB
Java
package redis.clients.util;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public interface Hashing {
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public static final Hashing MURMUR_HASH = new MurmurHash();
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public static final Hashing MD5 = new Hashing() {
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private MessageDigest md5 = null; // avoid recurring construction
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public long hash(String key) {
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return hash(SafeEncoder.encode(key));
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}
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public long hash(byte[] key) {
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if (md5 == null) {
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try {
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md5 = MessageDigest.getInstance("MD5");
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} catch (NoSuchAlgorithmException e) {
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throw new IllegalStateException(
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"++++ no md5 algorythm found");
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}
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}
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md5.reset();
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md5.update(key);
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byte[] bKey = md5.digest();
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long res = ((long) (bKey[3] & 0xFF) << 24)
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| ((long) (bKey[2] & 0xFF) << 16)
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| ((long) (bKey[1] & 0xFF) << 8) | (long) (bKey[0] & 0xFF);
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return res;
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}
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};
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public long hash(String key);
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public long hash(byte[] key);
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} |