Hi, Michael Homeijer wrote: > Have a look at the XMLDBtransformer in scratchpad, it could be easier to > add your functionality there.
I agree. > Additional functionality for the XMLDBTransformer could be: > - resolving nested xml queries and/or structures (ie. get the collection > and then get a document) > - adding stuff dbxml provides at the command line, ie. listing, adding, > removing and querying collections > > To do this two changes have to be made to the transformer: > 1. implementing it in a way that commands can easily be added to it. (How > about innerclasses that handle a command?) > 2. you should be able to use results from a query or a command in the next > query. The standard way in Cocoon to do this, is chaining of Transformers. This requires, that you know at deploy time, how deep your queries are nested. However you should write a purpose build generator/transformer anyway, if your queries are very complicated and nested . Martin Holz wrote: > > I see one problem with the source concept, if you are > > retrieveing lots of > > resources from the same collection. There are three steps to > > get a resource from xindice; > > > > 1) register database > > 2) get collection > > 3) get document > > > > Typical performance numbers are: > > 1) Need 158.0 ms for Database. > > 2) Need 1962.0 ms for Collection. > > 3) Need 294.0 ms for Document. > > > > Time for 1) drops dramatically after the first call. > > Time for 3) is unavoidable. Time for creating a collection > > drops too, if you > > call it more than once, but is still high. So you want to > > keep the collection > > open, if you need to get documents from this collection often. > > > > You could configure a generator to cache a collection. > > That does not work with current implementation, but it would > > be straight > > forward to add. I can't see, how to add this capability to > > the source URL. --------------------------------------------------------------------- Please check that your question has not already been answered in the FAQ before posting. <http://xml.apache.org/cocoon/faqs.html> To unsubscribe, e-mail: <[EMAIL PROTECTED]> For additional commands, e-mail: <[EMAIL PROTECTED]>
