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https://issues.apache.org/jira/browse/HADOOP-3048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12580268#action_12580268
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Enis Soztutar commented on HADOOP-3048:
---------------------------------------
For completeness, I will repeat Chris Douglas' comments about the
implementation here :
* DefaultStringifier could reuse more of the objects it creates. The serializer
will hold a reference to the ByteArray(Input/Output)Buffers you've defined, so
re-opening and closing them every time is unnecessary if you use a resetable
stream like o.a.h.io.Data(Input/Output)Buffer.
* The static convenience methods (load, store, storeArray) that create new
Stringifiers in DefaultStringifier are probably unnecessary. Adding a
stringified object to a config doesn't need that much support.
* Further, it's not clear to me how one would register a Stringifier that
isn't a DefaultStringifier. Would it make sense to follow the pattern in the
Serialization framework from HADOOP-1986- or the WritableComparator static
initialization- and register custom Stringifiers for classes?
> Stringifier
> -----------
>
> Key: HADOOP-3048
> URL: https://issues.apache.org/jira/browse/HADOOP-3048
> Project: Hadoop Core
> Issue Type: New Feature
> Affects Versions: 0.17.0
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.17.0
>
> Attachments: stringifier_v1.patch
>
>
> Storing arbitrary objects in the configuration has been discussed before in
> HADOOP-449 and HADOOP-1873. Although enabling such functionality has the risk
> of encouraging people to put big binary objects in the configuration, for
> some use cases passing objects to tasks is absolutely necessary.
> This issue will track the implementation of a Stringifier interface which
> stringifies and destringifies objects. Using this implementation, developers
> can store objects in the configuration and restore them later.
> Any thoughts ?
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