multiple domains to single webapp in tomcat

Question

Is there any way to point multiple sub domains to single webapp in tomcat 7 ?

e.g.

admin.test.com

has already assigned to a webapp.

Answer 1

On the top of my head I can think about the following ways.

1. Create copy of your war file, give it different way and put under TOMCAT_HOME/webapps. Actually this means that you will have 2 applications installed from the same code base. However if your application uses only DB to store state this is probably not a problem.
2. If you are on Unix create softlink into webapps directory to your war file. So, you will get the same solution as in #1 but without copying file.
3. Create 2 contexts that point to the same file. For details see this or similar document: http://tomcat.apache.org/tomcat-5.5-doc/config/context.html#Automatic_Context_Configuration
4. Use alias. Here is document that explains how: http://tomcat.apache.org/tomcat-5.5-doc/config/host.html#Host_Name_Aliases

Answer 2

There is a much easier way to do this:

  <Host name="domain1.com" ...>
    <Alias>www.domain1.com</Alias>
    <Alias>domain1.net</Alias>
    <Alias>www.domain1.net</Alias>
    ...
   </Host>