Mailing-List: contact dev-help@avro.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@avro.apache.org
Date: Tue, 29 Nov 2011 15:53:41 +0000 (UTC)
From: "Vyacheslav Zholudev (Commented) (JIRA)" <jira@apache.org>
To: dev@avro.apache.org
Message-ID: 
 <1165488256.22135.1322582021709.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <530781826.21522.1322561620019.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (AVRO-964) Provide clone() method for generated
 avro-specific objects
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira