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From "Vyacheslav Zholudev (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-964) Provide clone() method for generated avro-specific objects
Date Tue, 29 Nov 2011 15:53:41 GMT

    [ https://issues.apache.org/jira/browse/AVRO-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159322#comment-13159322

Vyacheslav Zholudev commented on AVRO-964:

Oops, equals(), toString() and hashCode() using SpecificData, but you were referring to GenericData
and I made some test also with GenericData.
> Provide clone() method for generated avro-specific objects
> ----------------------------------------------------------
>                 Key: AVRO-964
>                 URL: https://issues.apache.org/jira/browse/AVRO-964
>             Project: Avro
>          Issue Type: Improvement
>          Components: java
>    Affects Versions: 1.7.0
>            Reporter: Vyacheslav Zholudev
> It would be great to provide a generated clone() method for avro-specific objects like
it is done for equals(), toString() and hashCode() methods.
> Due to object re-usage in Hadoop, it is often necessary to clone objects because they
have to be processed all together after e.g. Reducer input has been read. 
> Currently I see two ad-hoc options to deal with it:
> 1) Create potentially lots of tedious code to clone objects manually. This method is
error-prone, since it's easy to forget cloning of some fields after schema evolution
> 2) Use DatumWriter and DatumReader to serialize/deserialize objects. This method works
extremely slow (in my experiments 30-40 times slower than method #1.
> So neither of methods is sufficiently good, on the other hand adding a generated clone()
method should be not that complicated.

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