avro-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "James Baldassari (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-964) Provide clone() method for generated avro-specific objects
Date Tue, 29 Nov 2011 15:18:40 GMT

    [ https://issues.apache.org/jira/browse/AVRO-964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159308#comment-13159308
] 

James Baldassari commented on AVRO-964:
---------------------------------------

When you say _clone_, are you referring to a shallow copy or a deep copy of the object?  Have
you seen {{org.apache.avro.generic.GenericData#deepCopy(Schema, Object)}}?  This may do what
you need.
                
> 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

        

Mime
View raw message