>
> Revisiting this after a few weeks... :-)
>
> On Mar 31, 2004, at 11:48 PM, Jean-Christophe Kermagoret wrote:
>
> > Mark Lundquist wrote:
> >
> >> OK, so I would like to pass a parameter in to my Cocoon
> application
> >> via a context attribute (because I can set that in my Jetty
> >> configuration file). How do I access a context attribute
> from within
> >> one of my Java classes?
> >>
> >> Thx-a-lot,
> >> mark
> >>
> >>
> >>
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> >>
> >>
> > Hi Mark,
> > have you tried something like that ? It's a javascript code
> but java
> > code is almost the same.
> >
> > /**
> > * Example :
> > * getContextValue("authentication","/authentication/ID");
> > * getContextValue("authentication","/authentication/role");
> > * getContextValue("authentication","/authentication/data/user");
> > **/
> > function getContextValue(contextPath, path) {
> > var contextMan =
> > cocoon.getComponent(Packages.
> > org.apache.cocoon.webapps.session.ContextManager.ROLE);
> > var context = contextMan.getContext(contextPath);
> >
> > return context.getXML(path).getTextContent();
> > }
>
> That's all great, except that it all depends on the FOM. In
> plain old
> Java I don't have cocoon.getComponent().
>
> I know the answer should be simple: to be a client of ContextManager,
> just be an Avalon component that implements Serviceable, then you get
> your ServiceManager from service() and you can call
> lookup(org.apache.cocoon.webapps.session.ContextManager.ROLE) on it.
> But I'm having trouble figuring out how to get this solution to fit
> with what I've got...
>
> My domain objects are all written as plain old regular Java classes,
> with flowscript gluing them to the sitemap. To give a little
> context... the class that needs to be able to access a
> servlet context
> attribute is factory for Hibernate sessions, and the attribute is an
> "instance" name for the application that will be used to
> derive a JNDI
> path for the datasource, to be passed to the Hibernate
> configuration.
> The factory has static methods to get/create and close an associated
> resource (a ThreadLocal hibernate Sesssion).
>
> So, turning this factory into an Avalon component just pushes my
> problem back one level, because now how do the factory's
> clients access
> it? As POPOs they have no ServiceManager and are unable to
> look up the
> factory component, just as the factory component had been unable to
> look up ContextManager when it was POJ!
>
> BTW I have zero experience with Avalon components (or any other kind
> for that matter)... I suppose the right way to have done my project
> would have been to use components from the get-go, but that
> would have
> been just beyond the level of learning curve for me to
> tolerate at the
> time.
>
> So, how do I solve this problem? I could use a singleton,
> which seems
> way hacky... any ideas?
One solution that has been proposed on this list before is to create a
simple Avalon component that implements Serviceable. Then give this
component a static method called getServiceManager(). Now any POJO can get
a ServiceManager and use it to retrieve any other components it wants.
>
> thx,
> mark
>
>
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>
>
>
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