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Date: Thu, 01 Aug 2013 20:19:49 +0200
From: Mark Thomas <markt@apache.org>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: GetRealPath Alternative for WAR Deployment
References: <CE1FEDE5.33F3%jmajors@tribune.com>
In-Reply-To: <CE1FEDE5.33F3%jmajors@tribune.com>
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On 01/08/2013 17:45, Majors, Jeremy wrote:
> I've seen multiple postings online that state that when you deploy a
> WAR file rather than using an exploded WAR, then the
> request.getServletContext().getRealPath() method returns null.  Due
> to a requirement by my team lead, I cannot deploy the application in
> any other fashion besides a precompiled WAR file (deploying a folder
> fixes this issue) and I was using the
> request.getServletContext().getRealPath()  method so that I could get
> the version # of the WAR that I have deployed (ex:  myWAR##001.war).
> Is there another way to get the version number?  I also looked online
> to see if there was a way to get the docBase parameter from the
> context file, but all the postings for that said to use
> request.getServletContext().getRealPath(), which is returning null.
> 
> Any guidance would be greatly appreciated.

There are ways via Tomcat internals but they tend to get blocked in
production environments.

The simplest way is to add a version.properties file to WEB-INF/classes
(kept up to date by your build script) with the information you need and
access it via the class loader.

Mark

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