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https://issues.apache.org/jira/browse/CLEREZZA-214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reto Bachmann-Gmür closed CLEREZZA-214.
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Assignee: Reto Bachmann-Gmür
Resolution: Won't Fix
I think what should be used here are virtual graphs as temporary addition to
the content graph.
TypeHandlers are there to allow response a response of an arbitrary type. A
typical usecase would be to deliver a binary stream encoding the sound of the
requested music resource, especially if this data cannot easily be conceived in
RDF.
If typehandlers returns a graphnode, the graphnode backing the graphnode must
contain all information the rendering mechanism might need. If the ssp includes
a referenced resource as reference in the html (image, object,...) a
TypeHandler might be invoked on that resource but this is only the case when a
new request is processed, typehandlers are seen as a separate layer from the
rendering mechanism which is not invoked once a GraphNode has been returned by
a jax-rs or TypeHandler resource-method.
In the case you describe its about fast changing data external to the stored
graphs, I think that's a prototypical usecase for virtual graph as
content-graph addition, its about content not presentation.
> In platform.typerendering: When using the render() function in ssp, a
> TypeHandler (if existent) should be invoked to "process" GraphNode before
> rendering.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CLEREZZA-214
> URL: https://issues.apache.org/jira/browse/CLEREZZA-214
> Project: Clerezza
> Issue Type: Improvement
> Reporter: Manuel Innerhofer
> Assignee: Reto Bachmann-Gmür
>
> At the moment:
> E.g I have a resource of type "http:localhost:8080/MyTop10CountrySongs". When
> I request the resource in the browser, then my Top10CountrySongsTypeHandler
> is invoked, which will search my graph and determines by top 10 favorite
> country songs. A graph node in a UnionGraph of a SimpleMGraph (containing
> triples from my resource to the 10 songs) and the content graph is finally
> returned by the TypeHandler for rendering.
> The Problem:
> Now I'd like to render my "http:localhost:8080/MyTop10CountrySongs" resource
> within a .ssp. But the Top10CountrySongsTypeHandler, which complemented the
> graph, is not executed, therefore the the properties pointing to the songs
> are missing.
> The Request:
> Please fix this
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