How to obtain JTA Transaction / User Transaction from JSF Context

There are 3 ways UserTransaction can be obtained from JSF Context, ie. InitialContext object.

1. Using SessionContext or EJBContext from within your EJB implementation class. Only Bean-Managed transaction beans can have access

@Resources EJBContext context;
UserTransaction utx = (UserTransaction) context.getUserTransaction();

2. Using InitialContext from your JSF controller class or utility class using the EJB

UserTransaction utx; 
try {
    InitialContext context = new InitialContext();
    utx = (UserTransaction) context.lookup("java:comp/UserTransaction");
} catch(Exception e){} 

3. Using InitialContext from your JSF controller class or utility class using the EJB

UserTransaction utx; 
try {
    InitialContext context = new InitialContext();
    utx = (UserTransaction) context.lookup("java.transaction.UserTransaction");
} catch(Exception e){}