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Move Jedis CRC16 util as it's being used in the project.

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Changed Makefile to cleanup redis cluster node configuration before running tests
Add cleanup to ClusterCommandTest.
This commit is contained in:
Marcos Nils
2014-01-14 15:57:53 -03:00
parent 33716e237c
commit 4ab8ea2ef7
5 changed files with 45 additions and 8 deletions
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2
src/main/java/redis/clients/jedis/JedisClusterCommand.java
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@@ -3,7 +3,7 @@ package redis.clients.jedis;
import redis.clients.jedis.exceptions.JedisAskDataException;
import redis.clients.jedis.exceptions.JedisClusterException;
import redis.clients.jedis.exceptions.JedisMovedDataException;
import redis.clients.jedis.tests.utils.JedisClusterCRC16;
import redis.clients.util.JedisClusterCRC16;
public abstract class JedisClusterCommand<T> {

21
src/main/java/redis/clients/util/JedisClusterCRC16.java Normal file
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@@ -0,0 +1,21 @@
package redis.clients.util;
public class JedisClusterCRC16 {
public final static int polynomial = 0x1021; // Represents x^16+x^12+x^5+1
static int crc;
public static int getSlot(String key) {
crc = 0x0000;
for (byte b : key.getBytes()) {
for (int i = 0; i < 8; i++) {
boolean bit = ((b >> (7-i) & 1) == 1);
boolean c15 = ((crc >> 15 & 1) == 1);
crc <<= 1;
// If coefficient of bit and remainder polynomial = 1 xor crc with polynomial
if (c15 ^ bit) crc ^= polynomial;
}
}
return crc &= 0xffff % 16384;
}
}