Re: [Exist-development] [Exist-open] The Trigger Promise

[Dan M. <dan...@gm...>]

Peter,

Nice work on the Wikibook article!  You are a very good writer.  Is English
your native language?

I also think this would be VERY useful for doing things like adding
MS-documents and PDF documents to a collection or subcollection.
Unfortunately I am not qualified to debug the lower-level Java code but I am
happy to help out in testing.

- Dan

On Wed, Sep 22, 2010 at 8:27 AM, Hungerburg <pc...@my...> wrote:

> I have been trying to get triggers working in eXist. As promised, I
> documented my findings in the xquery wiki. There is moderate success,
> the wiki entry shows working code.
>
> http://en.wikibooks.org/wiki/XQuery/Using_Triggers_to_assign_identifiers
>
> But, as Dan already said, eXist xquery triggers cannot be relied on. I
> found, that triggers may cause the thread they run in to hang, with
> further changes to the affected resource going through without
> triggering the script anymore. That makes them not suitable for critical
> operations in a database.
>
> Also, the xquery syntax useable in triggers seems to me reduced to the
> prolog, a severe limitation. As I am only a newbee, maybe I missed
> something. From the looks of it, the script must not return (anything).
>
> The Trigger Promise:
>
> I would like eXist to act like a filesystem: windows explorer, mac
> finder, fuse-dav or any other webdav client being the frontend. That
> rules out Dan's suggestion of passing uploads through an xquery. For the
> use case of mine, where there is lots of mostly binary documents and
> only little structure (one xml that glues stuff together), I consider
> drag and drop superior to filling forms.
>
> In a way, I would like the eXist framework to act as the controller.
> Offering many great advantages over, say Samba: eg. schema validation,
> lucene search or processing pipelines to name some. Am I unreasonable?
>
> Thank you, as always!
>
> --
> peter
>
>
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Dan McCreary
Semantic Solutions Architect
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