java - Expose a webservice from existing web application -

i have below questions on mind related exposing webservice.

1. we have existing web application based spring mvc architecture, application deployed on jboss server in form of packaged war. there access-manager-application manages authentication/user management application.
2. there new requirement of exposing 1 of api of application web service. possible expose webservice in existing war only? spring support web application , webservice through same web.xml , context xml?
3. or there should different war , new domain? existing domain protected access manager. possible expose of webservice same domain pass access manager going soap request?

i apologies asking basic questions.

thanks..

soap communication happens on http. hence, web app able handle it. far auth goes, you'll have adjust auth config web service endpoints.

i'm sure can find lot of tutorials on how build soap ws spring mvc.