Add slot based connection which routes requests according to key slot

src/main/java/redis/clients/jedis/JedisSlotBasedConnectionHandler.java

@@ -0,0 +1,30 @@
+package redis.clients.jedis;
+
+import java.util.Random;
+import java.util.Set;
+
+import redis.clients.jedis.tests.utils.JedisClusterCRC16;
+
+public class JedisSlotBasedConnectionHandler extends JedisClusterConnectionHandler {
+
+	
+	public JedisSlotBasedConnectionHandler(Set<HostAndPort> nodes) {
+		super(nodes);
+	}
+
+	
+	public Jedis getConnection(String key) {
+		int keySlot = JedisClusterCRC16.getSlot(key);
+		JedisPool connectionPool = slots.get(keySlot);
+		if (connectionPool == null) {
+			connectionPool = getRandomConnection();
+		}
+		return connectionPool.getResource();
+	}
+	
+	private JedisPool getRandomConnection() {
+		Object[] nodeArray =  nodes.values().toArray();
+		return (JedisPool) (nodeArray[new Random().nextInt(nodeArray.length)]);
+	}
+
+}