jdeppe-pivotal commented on a change in pull request #6117:
URL: https://github.com/apache/geode/pull/6117#discussion_r592787765



##########
File path: 
geode-redis/src/main/java/org/apache/geode/redis/internal/data/ByteArrayWrapper.java
##########
@@ -107,6 +115,39 @@ public int compareTo(ByteArrayWrapper other) {
     return arrayCmp(value, other.value);
   }
 
+  /**
+   * Used by the {@link RedisPartitionResolver} to map slots to buckets. 
Supports using hashtags
+   * in the same way that redis does.
+   *
+   * @see <a href="https://redis.io/topics/cluster-spec";>Redis Cluster Spec</a>
+   */
+  public synchronized Object getRoutingId() {
+    if (routingId == null && value != null) {
+      int startHashtag = Integer.MAX_VALUE;
+      int endHashtag = 0;
+
+      for (int i = 0; i < value.length; i++) {
+        if (value[i] == '{' && startHashtag == Integer.MAX_VALUE) {
+          startHashtag = i;
+        }
+        if (value[i] == '}') {

Review comment:
       Thanks!

##########
File path: 
geode-redis/src/distributedTest/java/org/apache/geode/redis/internal/cluster/RedisPartitionResolverDUnitTest.java
##########
@@ -0,0 +1,119 @@
+/*
+ * 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.cluster;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+import redis.clients.jedis.Jedis;
+
+import org.apache.geode.cache.Region;
+import org.apache.geode.cache.partition.PartitionRegionHelper;
+import org.apache.geode.internal.cache.LocalDataSet;
+import org.apache.geode.redis.internal.RegionProvider;
+import org.apache.geode.redis.internal.data.ByteArrayWrapper;
+import org.apache.geode.redis.internal.data.RedisData;
+import org.apache.geode.test.awaitility.GeodeAwaitility;
+import org.apache.geode.test.dunit.SerializableCallableIF;
+import org.apache.geode.test.dunit.rules.MemberVM;
+import org.apache.geode.test.dunit.rules.RedisClusterStartupRule;
+
+public class RedisPartitionResolverDUnitTest {
+
+  @ClassRule
+  public static RedisClusterStartupRule cluster = new 
RedisClusterStartupRule(4);
+
+  private static final String LOCAL_HOST = "127.0.0.1";
+  private static final int JEDIS_TIMEOUT =
+      Math.toIntExact(GeodeAwaitility.getTimeout().toMillis());
+  private static Jedis jedis1;
+
+  private static MemberVM server1;
+  private static MemberVM server2;
+  private static MemberVM server3;
+
+  private static int redisServerPort1;
+  private static int redisServerPort2;
+  private static int redisServerPort3;

Review comment:
       Done




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