[jira] Commented: (JCR-851) Handling of binary properties (streams) in QValue interface

["Jukka Zitting (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JCR-851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12509517 ] 

Jukka Zitting commented on JCR-851:
-----------------------------------

Some background on the patch above. We discussed this issue with Marcel, Angela, and Julian, and it seems like the best way to manage binary streams is to use some sort of a binary handle (a temporary file or a reference to the backend store) instead of the live InputStream reference.

> Handling of binary properties (streams) in QValue interface
> -----------------------------------------------------------
>
>                 Key: JCR-851
>                 URL: https://issues.apache.org/jira/browse/JCR-851
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: SPI
>            Reporter: Julian Reschke
>         Attachments: QValue.patch
>
>
> The current SPI requires QValue to return new streams upon each call to getStream(). As far as I can tell, this essentially requires a QValue implementation to preserve the whole content of a stream, be it in memory or on disk.
> In particular (and unless I'm missing something), when importing large content into a repository, this causes the whole data stream to be written twice. We really should try to avoid that.

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