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From Antonio S. CofiƱo <>
Subject Re: Getting application root path before servlet is initialized?
Date Wed, 22 Feb 2017 12:11:56 GMT
Dear Martin,

On 21/02/17 13:31, Martin Knoblauch wrote:
> Hi,
>   is there a way to find the absolute path of the application root before
> the servlet is initialized?
> Alternatively: is there a way to defer the initialization of a datasource
> until the servlet is initialized?
> Background: I have extended "org.apache.tomcat.jdbc.pool.DataSourceFactory"
> to automatically set credentials so that they are not stored in the
> "Catalina/localhost/XXX.xml" file. Instead they are taken from encrypted
> values in a file below the application root. Works fine if I know that path
> at "createDataSource" time.
> In order to avoid hard coding that path, I need a programmatic to find that
> value. Unfortunately the datasource is initialized before the servlet, so
> "getRealPath()" is not working yet.
> Environment is Tomcat 8 plus JDK 8. Plus an commercial application that I
> do not want to name :-)
> Thanks in advance
> Martin
For this purpose I use the ant properties interpolation on tomcat 
configuration xml-files

It may be you requirements needs a more elaborated solution, but this a 
convenient way to do it.


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