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http://jira.codehaus.org/browse/GEOT-3302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Victor Tey reopened GEOT-3302:
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Assignee: Victor Tey (was: Justin Deoliveira)
Neglected to take ResultType=hits into consideration
> App-schema: get numberOfFeatures without executing the query
> ------------------------------------------------------------
>
> Key: GEOT-3302
> URL: http://jira.codehaus.org/browse/GEOT-3302
> Project: GeoTools
> Issue Type: Improvement
> Components: core xml
> Reporter: Rini Angreani
> Assignee: Victor Tey
> Attachments: Geot-3302 - Relavant Patch.zip, GEOT-3302 FULL
> PATCH.zip, GEOT-3302.zip
>
>
> To support streaming of features, GeoServer WFS writes the root element of a
> response and then each feature as it is created. The root element requires a
> numberOfFeatures element; because the number of features is not known,
> GeoServer must get them all to count them. It then must get them all a second
> time to encode them one by one. (Streaming is needed as not all responses
> will fit in memory.) The consequence of the double query is that WFS
> responses take twice as long. This is particularly bad for app-schema as it
> is already very slow.
> In practice, GeoServer streams features to disk first, so that an error
> document can be returned if an error occurs. (This is a selectable output
> strategy.)
> In theory it should be possible to stream only the features to disk as an XML
> fragment, then encode the root element on the fly when all the features have
> been seen, meaning the numberOfFeatures is known, and only one query is
> required.
> This may require modification to Encoder, OutputStrategy, and OutputFormat
> APIs.
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