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From lvfangmin <...@git.apache.org>
Subject [GitHub] zookeeper pull request #632: [ZOOKEEPER-3150] Add tree digest check and veri...
Date Tue, 23 Oct 2018 19:30:59 GMT
Github user lvfangmin commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/632#discussion_r227533265
  
    --- Diff: zookeeper-server/src/main/java/org/apache/zookeeper/server/util/AdHash.java
---
    @@ -0,0 +1,84 @@
    +/**
    + * 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.util;
    +
    +/**
    + * This incremental hash is used to keep track of the hash of
    + * the data tree to that we can quickly validate that things
    + * are in sync.
    + *
    + * See the excellent paper: A New Paradigm for collision-free hashing:
    + *   Incrementality at reduced cost,  M. Bellare and D. Micciancio
    + */
    +public class AdHash {
    --- End diff --
    
    I'd like to keep it as is, since it's consistent with the name in the paper.


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