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From "Kimberly Begley" <kimberly.le...@gmail.com>
Subject Re: where to put config file in a webapp
Date Wed, 02 Apr 2008 12:17:58 GMT
very cool - yes sorry I never seem to give enough detailed info - thanks for
reading my mind! you have my wants described very clearly!
I will give it a go - thanks!!

On Wed, Apr 2, 2008 at 10:08 PM, Peter Crowther <Peter.Crowther@melandra.com>
wrote:

> > From: Kimberly Begley [mailto:kimberly.lewis@gmail.com]
> > Great thanks - it's not actually in a servlet - just a java
> > class of methods
> > so I guess I could pull it out of the java class and put it
> > into the servlet
> > that is calling the method - if that makes sense - I was just
> > hoping to avoid that.
>
> Can we be clear about what "it" is here?  Lots of pronouns, no clarity
> :-).
>
> If I read you correctly:
>
> 1. You have a Java class that reads a config file, presently from a
> hard-coded location;
>
> 2. Other code within your webapp invokes methods on the Java class that
> reads the config file in order to read configuration information;
>
> 3. You want the Java class to be sensitive to the webapp's location, so
> that the class can read the file from a location within the webapp;
>
> 4. You don't want to put webapp-specific code into the Java class that
> reads the config file.
>
> While you can't *quite* do both 3 and 4, the following approach might be
> helpful:
>
> - Amend the class that reads the config file so that it can accept a
> stream, possibly in a constructor or static method call - depends whether
> you're instantiating the class.  Read the config data, close the stream -
> you don't want to hold a file stream open for longer than you have to!
>
> - In your servlet code, use Chuck's init parameter approach to obtain the
> path to the config file.  Open a stream using getResourceAsStream() and hand
> that stream to the class that reads the config file.
>
> - If you still want your class that reads the config file to be usable in
> non-webapps, re-code so that if the class hasn't been passed a stream by the
> time the first config variable is requested, it loads from a default
> location.
>
> This isolates your class for reading the config file from any servlet
> dependencies (they're external) at the expense of a little more complexity.
>
>                - Peter
>
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>


-- 
Kimberly Begley

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