How to carry out a privileged task to be Run As a user Identity in a plain java class using jboss API ?

Issue

• How to carry out a privileged task to be Run As a user Identity in a plain java class using jboss API ?
• Weblogic Code equivalent in JBoss for weblogic.security.Security.RunAs(Subject user, PrivilegedAction action) as specified in Oracle Link
• The following code is currently used in our application which is in weblogic. Please help how can we replace this in JBoss.

weblogic.security.Security.runAs(
                        SubjectUtils.getAnonymousUser()
                        , MailMessage
                        );