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From ctubbsii <...@git.apache.org>
Subject [GitHub] accumulo pull request #279: ACCUMULO-3238 Table.ID Namespace.ID Refactor
Date Tue, 11 Jul 2017 03:52:06 GMT
Github user ctubbsii commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/279#discussion_r126589554
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/client/impl/AbstractId.java ---
    @@ -0,0 +1,86 @@
    +/*
    + * 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.accumulo.core.client.impl;
    +
    +import static java.nio.charset.StandardCharsets.UTF_8;
    +import static java.util.Objects.requireNonNull;
    +
    +import java.io.Serializable;
    +import java.util.Objects;
    +
    +/**
    + * An abstract identifier class for comparing equality of identifiers of the same type.
    + */
    +public abstract class AbstractId implements Comparable<AbstractId>, Serializable
{
    --- End diff --
    
    Stuff in tableOps are FATE operations, which are serialized and stored in ZK. So, this
object must also be Serializable, so it can be included in the FATE serialization. That's
unfortunate. It's probably okay, as long as we check for outstanding FATE operations from
the previous shutdown, before we modify *ANYTHING* during the upgrade process, because we
won't be able to deserialize FATEs from before the upgrade.


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