Github user lvfangmin commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/632#discussion_r227532976
--- Diff:
zookeeper-server/src/main/java/org/apache/zookeeper/server/command/HashCommand.java
---
@@ -0,0 +1,49 @@
+/**
+ * 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.zookeeper.server.command;
+
+import java.io.PrintWriter;
+import java.util.List;
+
+import org.apache.zookeeper.server.DataTree.ZxidDigest;
+import org.apache.zookeeper.server.ServerCnxn;
+
+/**
+ * Command used to dump the latest digest histories.
+ */
+public class HashCommand extends AbstractFourLetterCommand {
--- End diff --
That seems more consistent, will do.
---
