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https://issues.apache.org/jira/browse/CASSANDRA-1437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903585#action_12903585
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Stu Hood commented on CASSANDRA-1437:
-------------------------------------
The gist is that client objects need to be 'sanitized' (aka, have defaults
filled in programmatically for optional fields), but that internal objects
should never have optional fields.
> Improve default handling/validation for config.Metadata objects
> ---------------------------------------------------------------
>
> Key: CASSANDRA-1437
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1437
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Stu Hood
> Priority: Minor
> Fix For: 0.7.0
>
>
> Post CASSANDRA-1436, we'll be back to single Avro objects to describe schemas
> for client and internal use: it would be a good opportunity to improve our
> handling of defaults and our validation of config.*Metadata objects.
> Right now, we have multiple ways to convert a CfDef to a CFMetaData object
> (for example), due to the differences between the defaults that should be
> chosen for a _new_ column family (when we receive the CfDef from a client),
> versus an _existing_ column family after a new setting has been added
> (deserializing a CfDef from disk). Finding a unified way to handle these two
> (potentially different) default values would be excellent.
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