[Digester] Trouble with digester logger

[Rupesh Khandelwal <ru...@gmail.com>]

Hi All,

I have recently started using digester, So far I have been able to make
things work, however I have certain questions in mind.

1. Even when I have registered only a fileAppender for digester
logger, digester is logging messages on the console also. Can I stop
that?
2. If certain method (being called from digester internally) returns
an object, how can I use this object for subsequent digester
operations. (Can this returned be even pushed on the top of the stack)

Thanks
Rupesh

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Re: [Digester] Trouble with digester logger

[Rupesh Khandelwal <ru...@gmail.com>]

Hi Simon,

Thanks for your advice.

> The FactoryCreateRule allows user code to return objects which end up on
> the digester stack.
> 
> However Digester does not support the ability for invoking methods on
> objects already on the digester stack which return new objects to be
> manipulated. I guess you could write a custom Rule class to do this, but
> I can't see when this might be useful...

As per the requirements, I get an object initialized by parsing a XML
file say a.xml. And now some of the properties of this object need to
be overridden while parsing another XML file say b.xml. That's why
while parsing file b.xml I need previously initialized object on the
stack rather a new one. I can have method to return that object but
the problem is in how to push it onto the stack.

We have not opted for Factory classes as we have many such objects,
which will be initialized making use of two or more XML files.

A code snippet of a custom Rule class for pushing an object, which is
returned by a method, on to the stack, will be very helpful.

Thanks
Rupesh  


On 4/13/05, Simon Kitching <sk...@apache.org> wrote:
> On Mon, 2005-04-11 at 10:29 +0530, Rupesh Khandelwal wrote:
> > Hi All,
> >
> > I have recently started using digester, So far I have been able to make
> > things work, however I have certain questions in mind.
> >
> > 1. Even when I have registered only a fileAppender for digester
> > logger, digester is logging messages on the console also. Can I stop
> > that?
> 
> Digester logs sax-related messages to a category named
> "org.apache.commons.digester.Digester.sax" (as described in the javadoc
> package documentation), so you need to configure logging to control that
> category appropriately.
> 
> > 2. If certain method (being called from digester internally) returns
> > an object, how can I use this object for subsequent digester
> > operations. (Can this returned be even pushed on the top of the stack)
> 
> The FactoryCreateRule allows user code to return objects which end up on
> the digester stack.
> 
> However Digester does not support the ability for invoking methods on
> objects already on the digester stack which return new objects to be
> manipulated. I guess you could write a custom Rule class to do this, but
> I can't see when this might be useful...
> 
> Regards,
> 
> Simon
> 
>

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Re: [Digester] Trouble with digester logger

[Simon Kitching <sk...@apache.org>]

On Mon, 2005-04-11 at 10:29 +0530, Rupesh Khandelwal wrote:
> Hi All,
> 
> I have recently started using digester, So far I have been able to make
> things work, however I have certain questions in mind.
> 
> 1. Even when I have registered only a fileAppender for digester
> logger, digester is logging messages on the console also. Can I stop
> that?

Digester logs sax-related messages to a category named
"org.apache.commons.digester.Digester.sax" (as described in the javadoc
package documentation), so you need to configure logging to control that
category appropriately.

> 2. If certain method (being called from digester internally) returns
> an object, how can I use this object for subsequent digester
> operations. (Can this returned be even pushed on the top of the stack)

The FactoryCreateRule allows user code to return objects which end up on
the digester stack.

However Digester does not support the ability for invoking methods on
objects already on the digester stack which return new objects to be
manipulated. I guess you could write a custom Rule class to do this, but
I can't see when this might be useful...

Regards,

Simon


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