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Re: [jetty-dev] Option for Setting Context Params in Deployer Descriptors

Hey Greg, et al.

I went through and rewrote[1] the web app deployment page and tried to incorporate everything from the Jetty 6 docs. The one outstanding question that I had when writing it is what happened if you had a webapp file/directory in /webapps and also had a context deployment descriptor that would deploy to the same context path. I assumed the context deployment descriptor would be used but I wasn't sure.

I did not link to this document from the Jetty page because I first wanted to make sure you guys approved.


On 12/4/10 10:53 AM, Greg Wilkins wrote:

you can set context init parameters from a context.xml file with something like:

    <Get name=ServletContext>
      <Call name=setInitParameter>

But the problem with this style is that the real web.xml will be run
after the context.xml and may replace values that you set.
So that is why override descriptors are provides, so that they can be
set after the web.xml


On 4 December 2010 13:05, Chad La Joie<lajoie@xxxxxxxxx>  wrote:
I had asked on the user's list regarding the possibility of setting Servlet
context parameters within the a deployment descriptor.  I didn't receive an
answer so I went looking at the code and it seems like this is not possible.
  At least, I didn't see anything in the WebAppContext class or its super
types.  The closest thing appeared to be the ability to specify a special
web.xml file that would be merged with the one in the WAR.

A lot of web apps use context parameters to specify things that would change
per-deployment (e.g., configuration files).  Having to break open a WAR file
(assuming its zipped up) to change such information is annoying (and
honestly beyond the means of some novice deployers).

So, my suggestion is to allow people to specify Servlet context params
within a context deployment descriptor.

What do people think?

Chad La Joie
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