From: <glassfish_at_javadesktop.org>
Date: Tue, 04 Nov 2008 06:55:17 PST

With EJB3 and CMT, there is no way to change the transaction. You can only cause a rollback, that's all. But you can mark one bean to use BMT by annotating the class with

@TransactionManagement(TransactionManagementType.BEAN)

then let a field be injected with

    @Resource
    private EJBContext ctx;

The context gives you a UserTransaction on which you can do begin/commit/rollback.
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