[jira] Updated: (HADOOP-5450) Add support for application-specific typecodes to typed bytes

["Klaas Bosteels (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-5450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Klaas Bosteels updated HADOOP-5450:
-----------------------------------

    Attachment: HADOOP-5450.patch

The attached patch makes sure that the typecode range 50-200 can be used for application-specific purposes. As an example, it also makes {{TypedBytesWritableInput}} and {{TypedBytesWritableOutput}} use typecode 50 for serializing Writables that do not match with any of the types supported by the typed bytes format.

> Add support for application-specific typecodes to typed bytes
> -------------------------------------------------------------
>
>                 Key: HADOOP-5450
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5450
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: Klaas Bosteels
>            Assignee: Klaas Bosteels
>         Attachments: HADOOP-5450.patch
>
>
> For serializing objects of types that are not supported by typed bytes serialization, applications might want to use a custom serialization format. Right now, typecode 0 has to be used for the bytes resulting from this custom serialization, which could lead to problems when deserializing the objects because the application cannot know if a byte sequence following typecode 0 is a customly serialized object or just a raw sequence of bytes. Therefore, a range of typecodes that are treated as aliases for 0 should be added, such that different typecodes can be used for application-specific purposes.

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