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https://issues.apache.org/jira/browse/OAK-8186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16814195#comment-16814195
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Francesco Mari commented on OAK-8186:
-------------------------------------
[~mattvryan], my rule of thumb is that if something can be implemented below
JCR without introducing new, custom APIs, it will be implemented. If not, it
should probably be implemented on top of JCR.
It might be that this need for speed when accessing binaries is an actual
requirement of the application [[email protected]] is implementing. In this
case, [[email protected]] should probably choose different storage mediums
for the different kind of data he is manipulating. Maybe he should store some
data directly on the file system, and just store a reference to it (e.g. file
paths) in JCR. If a user needs certain data access patterns that are not
provided by JCR, that user should better implement those data access pattern in
his own code.
> Create API in OAK for file access to binaries in the repository.
> ----------------------------------------------------------------
>
> Key: OAK-8186
> URL: https://issues.apache.org/jira/browse/OAK-8186
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Reporter: Henry Saginor
> Priority: Major
> Attachments: FileCopyTest3.java, OAK File Access.jpg,
> fileCopyTest-0.0.1-SNAPSHOT.jar
>
>
> To get file access applications normally write binaries to temp files. It
> would be nice if an API existed to get file access directly from OAK. This
> might also meet some use cases documented at
> [https://wiki.apache.org/jackrabbit/JCR%20Binary%20Usecase]
> Suggested API and implementation can be found here [1]. Also, see attached
> diagram [2].
> I can create a patch if I can get some feedback. Note that suggested API
> makes it explicit that a temp file is created. I am not sure if direct access
> to files in datasore would be safe. But I am open to suggestions.
> [1]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-api/src/main/java/org/apache/jackrabbit/oak/api/blob/FileReferencable.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-api/src/main/java/org/apache/jackrabbit/oak/api/blob/TempFileReference.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-api/src/main/java/org/apache/jackrabbit/oak/api/blob/TempFileReferenceProvider.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/FileDSBlobTempFileReference.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/DataStoreBlobStore.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentBlob.java]
>
> [https://github.com/hsaginor/jackrabbit-oak/blob/directFileAccess/oak-store-spi/src/main/java/org/apache/jackrabbit/oak/plugins/value/jcr/BinaryImpl.java]
> [2]
> !OAK File Access.jpg!
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