Re: How to configure TraxProcessor in 2.2?

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On Tue, Dec 10, 2019 at 11:21:09PM +0100, gelo1234 wrote:
> I don't think this is the proper way to do this and if it's possible at
> all. Extension functions are only available in commercial releases of Sax=
on
> (PE and EE).
> I'm afraid they are not available in open-source Saxon-HE. We were trying
> to use Saxon-HE with Cocoon 3.0 and extension-functions without success.
> You either have to use OLDER release of Saxon or pay for the license.

No.  Before trying this in Cocoon, I wrote a tiny test application,
and it succeeded in defining integrated extension functions.

https://github.com/mwoodiupui/confman-demo

What one cannot do in Saxon-HE is register integrated extension
functions using a configuration file, as one can in -PE or -EE.  This
is why I need to do configuration in Java.

> wt., 10 gru 2019 o 21:19 Mark H. Wood <[email protected]> napisa=C5=82(a):
>=20
> > On Tue, Dec 10, 2019 at 12:10:41AM +0100, gelo1234 wrote:
> > > Mark,
> > >
> > > Why do you need a Custom XSLT Processor other than Saxon actually?? S=
axon
> > > should do the right thing. Why wrapping it inside any "upper-level"
> > > Transformer? It's getting kinda weird. You can always add a new Java
> > class
> > > to standard Cocoon Processors/Transformers.
> >
> > Because, as I said, I need to configure Saxon, and Saxon-HE can only
> > be configured programmatically.  So, if I want to register an
> > Integrated Extension Function, I have to gain access to the
> > TransformerFactory being created somewhere in the bowels of Cocoon,
> > get its Configuration, and call #registerExtensionFunction on that.
> >
> > To do this, I've created a class which extends TransformerFactoryImpl,
> > added a @PostConstruct method (which Spring should call after
> > instantiating the bean) to do the registration, and now I'm trying to
> > tell Cocoon to use my factory instead of the one that
> > javax.xml.transform.TransformerFactory will conjure up by default out
> > of the service provider framework when Saxon is present.
> >
> > > https://mrhaki.blogspot.com/2008/09/use-saxon-in-cocoon-22.html
> >
> > I've seen that.  So far it hasn't helped.
> >
> > > Greetings,
> > > Greg
> > >
> > >
> > > pon., 9 gru 2019 o 23:02 Mark H. Wood <[email protected]> napisa=C5=82(=
a):
> > >
> > > > On Thu, Dec 05, 2019 at 04:13:08PM +0100, Javier Puerto wrote:
> > > > > I recommend you to use the Spring configuration. I never had this
> > > > > requirement before but by the error message and the configuration
> > > > fragment
> > > > > that you have sent the NPE is caused because you are not passing =
an
> > > > > instance of "org.dspace.saxon.ConfigurableTransformerFactory", you
> > are
> > > > > passing a String instead.
> > > > >
> > > > > <property name=3D'transformerFactory'
> > > > >
> >  value=3D'org.dspace.saxon.ConfigurableTransformerFactory'/>
> > > > >
> > > > > IIRC you should change it to:
> > > > > <property name=3D'transformerFactory'>
> > > > >   <bean class=3D"org.dspace.saxon.ConfigurableTransformerFactory"=
/>
> > > > > </property>
> > > > >
> > > > > The attribute "value" is for literal values. You can also define =
the
> > bean
> > > > > with an ID and then use the attribute "ref" with the ID of the be=
an.
> > > > > I hope that helps.
> > > >
> > > > It would have made more sense for this to take a bean reference, but
> > > > the Javadoc for TraxProcessor says that setTransformerFactory() tak=
es
> > > > a String argument.  That seems to be correct:  when I change it to a
> > > > reference, I get:
> > > >
> > > > 09-Dec-2019 15:12:39.128 SEVERE [localhost-startStop-24]
> > > > org.apache.catalina.cor
> > > > e.StandardContext.listenerStart Exception sending context initializ=
ed
> > > > event to l
> > > > istener instance of class
> > > > [org.springframework.web.context.ContextLoaderListener
> > > > ]
> > > >         org.springframework.beans.factory.BeanCreationException: Er=
ror
> > > > creating
> > > > bean with name 'org.apache.excalibur.xml.xslt.XSLTProcessor/saxon'
> > defined
> > > > in Se
> > > > rvletContext resource [/WEB-INF/spring/applicationContext.xml]:
> > > > Initialization o
> > > > f bean failed; nested exception is
> > > > org.springframework.beans.ConversionNotSuppor
> > > > tedException: Failed to convert property value of type
> > > > 'org.dspace.saxon.Configu
> > > > rableTransformerFactory' to required type 'java.lang.String' for
> > property
> > > > 'trans
> > > > formerFactory'; nested exception is java.lang.IllegalStateException:
> > > > Cannot conv
> > > > ert value of type [org.dspace.saxon.ConfigurableTransformerFactory]=
 to
> > > > required
> > > > type [java.lang.String] for property 'transformerFactory': no match=
ing
> > > > editors o
> > > > r conversion strategy found
> > > >
> > > > When I change it back to the literal name of the class, the
> > > > webapp. starts normally.  But it still errors out when it tries to =
run
> > > > the XSLT transformer.
> > > >
> > > > It begins to look as though one can't really wire up TraxProcessor
> > > > using Spring.  (By this I mean:  using Spring's normal <bean>
> > > > <property> etc.)  I'm guessing that it blows up because nothing has
> > > > called #parameterize(Parameters), because #parameterize() knows how
> > > > the properties must be set up and makes sure they are all sensible,
> > > > and thus something was left unset.
> > > >
> > > > I tried adding
> > > >
> > > >   log4j.logger.org.apache.excalibur =3D DEBUG
> > > >   log4j.logger.org.apache.avalon =3D DEBUG
> > > >
> > > > to our logging config. but it made no useful difference in the
> > > > output.  I cannot see what paths are actually being consulted for
> > > > Cocoon component configuration, but it seems that none of the places
> > > > I've put my .xconf is one of them.
> > > >
> > > > > El mi=C3=A9., 4 dic. 2019 a las 22:46, Mark H. Wood (<mwood@iupui=
=2Eedu>)
> > > > escribi=C3=B3:
> > > > >
> > > > > > I'm using Cocoon 2.2.  I need to pass a custom XSLT transformer
> > > > > > factory (that wraps Saxon's to configure it) to TraxProcessor, =
and
> > the
> > > > > > advice I've found in several places around the Web doesn't seem=
 to
> > be
> > > > > > working:  my factory class never gets instantiated.
> > > > > >
> > > > > > I've got a file
> > META-INF/cocoon/avalon/cocoon-core-saxon-xslt.xconf:
> > > > > >
> > > > > > <?xml version=3D"1.0" encoding=3D"UTF-8"?>
> > > > > > <components>
> > > > > >   <component
> > role=3D"org.apache.excalibur.xml.xslt.XSLTProcessor/saxon"
> > > > > >     class=3D"org.apache.cocoon.components.xslt.TraxProcessor">
> > > > > >     <parameter name=3D"use-store" value=3D"true"/>
> > > > > >     <parameter name=3D"transformer-factory"
> > > > > >
> > > > value=3D"org.dspace.saxon.ConfigurableTransformerFactory"/>
> > > > > >   </component>
> > > > > > </components>
> > > > > >
> > > > > > I also tried copying it to WEB-INF/cocoon and it didnt' seem to
> > work
> > > > > > there either.
> > > > > >
> > > > > > I do have <configurator:settings/> and <avalon:bridge/> in the
> > Spring
> > > > > > config.
> > > > > >
> > > > > > Is there some way to debug component configuration and see if t=
he
> > file
> > > > > > is even being looked for (and where *is* configuration looking)?
> > The
> > > > > > Cocoon site directs me to Excalibur, which directs me to Avalon,
> > which
> > > > > > says that Avalon is wound up and directs me back to Excalibur..=
=2E.
> > > > > >
> > > > > >
> > > > > >
> > > > > > I've also tried to configure the thing using Spring:
> > > > > >
> > > > > >     <bean name=3D'org.apache.excalibur.xml.xslt.XSLTProcessor/s=
axon'
> > > > > >           class=3D'org.apache.cocoon.components.xslt.TraxProces=
sor'
> > > > > >           init-method=3D'initialize'
> > > > > >           destroy-method=3D'dispose'>
> > > > > >       <!--property name=3D'use-store' value=3D'true'/-->
> > > > > >       <property name=3D'transformerFactory'
> > > > > >
> > > >  value=3D'org.dspace.saxon.ConfigurableTransformerFactory'/>
> > > > > >     </bean>
> > > > > >
> > > > > > but so far I'm missing something:  TraxProcessor.sourceToSAX
> > throws an
> > > > > > NPE.  I'm probably not setting the parameters correctly -- there
> > isn't
> > > > > > a setter for use-store at all, for example.
> > > > > >
> > > > > > I've found any number of pages that tell me Avalon configuratio=
n is
> > > > > > being replaced by Spring, but nothing practical on how to conve=
rt
> > > > > > Avalon configuration (such as the first sample above) to Spring=
, or
> > > > > > even how to write fresh Spring configuration for Cocoon compone=
nts.
> > > > > > It would be nice to know how to do this even if I wind up using=
 the
> > > > > > Avalon approach with the present task.
> > > > > >
> > > > > > --
> > > > > > Mark H. Wood
> > > > > > Lead Technology Analyst
> > > > > >
> > > > > > University Library
> > > > > > Indiana University - Purdue University Indianapolis
> > > > > > 755 W. Michigan Street
> > > > > > Indianapolis, IN 46202
> > > > > > 317-274-0749
> > > > > > www.ulib.iupui.edu
> > > > > >
> > > >
> > > > --
> > > > Mark H. Wood
> > > > Lead Technology Analyst
> > > >
> > > > University Library
> > > > Indiana University - Purdue University Indianapolis
> > > > 755 W. Michigan Street
> > > > Indianapolis, IN 46202
> > > > 317-274-0749
> > > > www.ulib.iupui.edu
> > > >
> >
> > --
> > Mark H. Wood
> > Lead Technology Analyst
> >
> > University Library
> > Indiana University - Purdue University Indianapolis
> > 755 W. Michigan Street
> > Indianapolis, IN 46202
> > 317-274-0749
> > www.ulib.iupui.edu
> >

--=20
Mark H. Wood
Lead Technology Analyst

University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu

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