JavaEE Tip #6 - Resources

The @Resources annotation makes it possible to define resources that you are going to lookup at runtime. The example describes a way to lookup a data source that is mentioned in the @Resources annotation on the class.

    @Resources(value={
        @Resource(name="ShoppingCartDB", type=javax.sql.DataSource),
        @Resource(name="ShoppingCartMail", type=javax.mail.Session)
    })
    @Stateful
    public class ShoppingCartBean {

        public List getItems() {
            DataSource shoppingCartDB = (DataSource) ctx.lookup("ShoppingCartDB");
            Connection conn = shoppingCartDB.getConnection():
            return null;
        }
    } 
        

Posted December 18, 2014

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