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Posted to oak-issues@jackrabbit.apache.org by "Chetan Mehrotra (JIRA)" <ji...@apache.org> on 2014/03/29 20:32:15 UTC
[jira] [Resolved] (OAK-1567) Return Iterator instead of returning
List in DocumentStore.query
[ https://issues.apache.org/jira/browse/OAK-1567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chetan Mehrotra resolved OAK-1567.
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Resolution: Won't Fix
Fix Version/s: (was: 1.0)
0.20
This was required for Blob GC usecase. For now at least for Blob GC this is met via Mongo specific impl of ReferenceBlobCollectory (OAK-1643). So this is not required.
If later need is felt to support this for some other case then it can be reopened
> Return Iterator instead of returning List in DocumentStore.query
> ----------------------------------------------------------------
>
> Key: OAK-1567
> URL: https://issues.apache.org/jira/browse/OAK-1567
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: mongomk
> Affects Versions: 0.18
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Fix For: 0.20
>
>
> Currently the DocumentStore query method returns List after performing any query against backend. In case of Mongo the DBCursor returned [1] implements Iterable interface. And in all usage so far the code can work perfectly fine with Iterable
> It would be better if we change the api contract to return iterator and allow lazy traversal of the NodeDocuments. Further the pagination/batching would be handled within the Driver itself and the code above would not have to construct there on batching.
> See [2] for details
> [1] http://api.mongodb.org/java/2.0/com/mongodb/DBCursor.html
> [2] http://markmail.org/thread/ilcqtvaziie3ycb5
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