Request Attributes When Using Application Zones 
You can retrieve information about the application zone that the current request belongs to (when application zones are being used on the AS Java) in your servlet code. You retrieve them as request attributes using the getAttribute(String s) method of the HttpServletRequest object.
The following three attributes are available to servlet developers:
Attribute Name | Value |
com.sap.servlet.separator.zone | Contains the character that is used as a separator between the application alias name and the zone name. The zone separator is not configured. |
com.sap.servlet.request.alias | Contains the alias name of the application (without a zone identifier attached to it). |
com.sap.servlet.request.zone | Contains the application zone name that the request belongs to. |