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https://issues.apache.org/jira/browse/JENA-388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13566780#comment-13566780
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Andy Seaborne commented on JENA-388:
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If the last update timestamp is in the DatasetRef it can be shared between
query and update and GSP services.
The UberServlet is an alternative to different servlets for different services.
It's asingel dispatch object -- not active by default; long term, it may be
easier to take control of dispatch when caching and tiemsatmps are involved.
(The whole of "DatasetRef" needs reworking to become a proper config object.)
Whatever we do, I think this should be "experimental and subject to change" in
2.10.0 if documented at all.
FYI : Incoming SPARQL cache code in /Experimental
> Make Fuseki responses cacheable
> -------------------------------
>
> Key: JENA-388
> URL: https://issues.apache.org/jira/browse/JENA-388
> Project: Apache Jena
> Issue Type: Improvement
> Components: Fuseki
> Affects Versions: Fuseki 0.2.5
> Reporter: Leigh Dodds
> Assignee: Rob Vesse
> Fix For: Fuseki 0.2.6
>
>
> Fuseki currently sets Pragma and Cache-Control: No-Cache headers on all
> responses. This effectively disables all client side caching.
> While some public caching and caching proxies may not typically cache GET
> requests with parameters, this is changing (I believe the Squid default has
> changed, or is due to).
> This is more of an issue when using caches within system, e.g. between a user
> facing app and the fuseki instance. Some HTTP libraries support caching and
> rely on caching headers to control that.
> Fuseki could instead return Last-Modified dates + ETags (e.g. a hash of the
> Last-Modified). This would allow clients to perform Conditional GET requests
> and receive a 304 response if the store hasn't been updated.
> For read-only servers the Last-Modified date is the date on the index files.
> For read-write servers the date of the last transaction could be used.
> Alternatively an Expires header could be served, allowing clients to face for
> a specific period, but this ought to be configurable in the Fuseki config to
> allow for administrator control.
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