+ add incrementScore to zset operations

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/BoundZSetOperations.java

@@ -45,6 +45,8 @@ public interface BoundZSetOperations<K, V> extends KeyBound<K> {
 
 	Boolean add(V value, double score);
 
+	Double incrementScore(V value, double delta);
+
 	Long rank(Object o);
 
 	Long reverseRank(Object o);

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/DefaultBoundZSetOperations.java

@@ -44,6 +44,11 @@ class DefaultBoundZSetOperations<K, V> extends DefaultKeyBound<K> implements Bou
 		return ops.add(getKey(), value, score);
 	}
 
+	@Override
+	public Double incrementScore(V value, double delta) {
+		return ops.incrementScore(getKey(), value, delta);
+	}
+
 	@Override
 	public RedisOperations<K, V> getOperations() {
 		return ops.getOperations();

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/RedisTemplate.java

@@ -1155,6 +1155,19 @@ public class RedisTemplate<K, V> extends RedisAccessor implements RedisOperation
 			}, true);
 		}
 
+		@Override
+		public Double incrementScore(K key, V value, final double delta) {
+			final byte[] rawKey = rawKey(key);
+			final byte[] rawValue = rawValue(value);
+
+			return execute(new RedisCallback<Double>() {
+				@Override
+				public Double doInRedis(RedisConnection connection) {
+					return connection.zIncrBy(rawKey, delta, rawValue);
+				}
+			}, true);
+		}
+
 		@Override
 		public RedisOperations<K, V> getOperations() {
 			return RedisTemplate.this;

spring-data-redis/src/main/java/org/springframework/data/keyvalue/redis/core/ZSetOperations.java

@@ -28,16 +28,18 @@ public interface ZSetOperations<K, V> {
 
 	void intersectAndStore(K key, K destKey, Collection<K> keys);
 
+	void unionAndStore(K key, K destKey, Collection<K> keys);
+
 	Set<V> range(K key, long start, long end);
 
 	Set<V> rangeByScore(K key, double min, double max);
 
 	Set<V> reverseRange(K key, long start, long end);
 
-	void unionAndStore(K key, K destKey, Collection<K> keys);
-
 	Boolean add(K key, V value, double score);
 
+	Double incrementScore(K key, V value, double delta);
+
 	Long rank(K key, Object o);
 
 	Long reverseRank(K key, Object o);