More one context.xml in a Webapp

I use a context.xml file to set jndi resources for a webapp. I have a question.

Suppose I set resources for the webapp in the context.xml file in $CATALINA_HOME/conf/.

Then I put resources in the <CONTEXTPATH>.xml file and copy the file in
$CATALINA_HOME/conf/[enginename]/[hostname]/.

Finally I deploy my webapp and this webapp has a file context.xml in /META-INF dir.

Which of three files is read by Tomcat?

Mybe I have found a solution:

from this mailing list I read "If a <contextpath>.xml exists,
it always takes priority over anything in a WAR or an exploded directory."

If you are interesting about other informations I suggest you to read: Tomcat Configuration Reference

Here's the priorities, from low to high:

1. META-INF/context.xml in a WAR file
2. META-INF/context.xml in webapps/xxx (WAR) directory
3. conf/Catalina/localhost/xxx.xml (Context file) where "localhost" is replaced by alternative hostnames for more complex server setups.
4. DON'T put a context in server.xml!

An exploded WAR takes priority over a WAR file, even if the WAR file is newer. A characteristic of Tomcat that's caused me grief more than once, since it also means that a replacement WAR won't be exploded to take the place of an older exploded WAR.

Thanks Tim for your answer