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Subject: Re: [CONFIGURATION] Help with optional XML file in override section
 of configuration builder.
From: Ralph Goers <ralph.goers@dslextreme.com>
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Date: Wed, 16 Sep 2009 06:22:42 -0700
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On Sep 16, 2009, at 4:37 AM, Martin Ritchie wrote:

>
> Oliver,
> Thanks for the pointer to use DefaultConfigurationBuilder.
>
> Whilst this now does not need to have the test.config property defined
> or the file existing it does behave differently to the older
> ConfigurationFactory.
>
> With the configuration as shown in the pastie
> (http://pastie.org/617143) the ConfigurationFactory builds a single
> configuration tree where later elements are overwritten by newer
> values.
> So given the configuration values shown here: http://pastie.org/618625
> The value of tests.store.class in config.xml (MemoryMessageStore) is
> overwritten with (SlowMessageStore) from the test.config. The
> additional values in the test.config are also propgated in to the
> final configuraiton.
>
> When I changed to use the DefaultConfigurationBuilder the entire
> virtualhosts section was overwritten as a result the other virtualhost
> sections in config.xml were lost.
>
> Is there a way I can get the behaviour as seen with the
> ConfigurationFactory but have the file parsing/loading of the
> DefaultConfigurationBuilder?
>
What you are experiencing is probably a result of the NodeCombiner  
being used. In trunk you will find a "MergeCombiner" that may behave  
the way you want it to. If you build trunk you should look at the  
updated documentation as it provides some documentation on how the 3  
combiners work and what results they will produce in various situations.

Ralph


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