EJB 3.0 has specified following attributes of transactions which EJB containers implement :
REQUIRED : Indicates that business method has to be executed within transaction otherwise a new transaction will be started for that method.
REQUIRES_NEW : Indicates that a new transaction is to be started for the business method.
SUPPORTS : Indicates that business method will execute as part of transaction.
NOT_SUPPORTED : Indicates that business method should not be executed as part of transaction.
MANDATORY : Indicates that business method will execute as part of transaction otherwise exception will be thrown.
NEVER : Indicates if business method executes as part of transaction then an exception will be thrown.
