ringles commented on a change in pull request #6489:
URL: https://github.com/apache/geode/pull/6489#discussion_r636996608



##########
File path: 
geode-apis-compatible-with-redis/src/main/java/org/apache/geode/redis/internal/data/NullRedisSortedSet.java
##########
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more 
contributor license
+ * agreements. See the NOTICE file distributed with this work for additional 
information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache 
License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the 
License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software 
distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 
KIND, either express
+ * or implied. See the License for the specific language governing permissions 
and limitations under
+ * the License.
+ *
+ */
+
+package org.apache.geode.redis.internal.data;
+
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.geode.cache.Region;
+import org.apache.geode.redis.internal.executor.sortedset.SortedSetOptions;
+
+class NullRedisSortedSet extends RedisSortedSet {
+
+  NullRedisSortedSet() {
+    super(new ArrayList<>());
+  }
+
+  @Override
+  public boolean isNull() {
+    return true;
+  }
+
+  @Override
+  long zadd(Region<RedisKey, RedisData> region, RedisKey key, List<byte[]> 
membersToAdd,
+      SortedSetOptions options) {
+    if (options.isXX()) {
+      return 0;
+    }
+    region.create(key, new RedisSortedSet(membersToAdd));
+    return membersToAdd.size() / 2;
+  }

Review comment:
       My first stab at fixing this is up. Gonna do more cleanup, especially 
combining with other PR comments.




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