A first taste of EJB - EJB 3 in Action - page 52

As you can see, both the inputText field and the button are bound to underlying beans
using binding expressions . The inputText field is bound to the amount field of
a bean named bid . This means that the text field displays the value of the bound bean
field and any value entered into the text field is automatically set into the bean field. The
Place Bid button is bound to the placeBid method of a bean named bidManager . This
means that the bound method is automatically invoked when the button is clicked. The next
listing shows code that the JSF page elements are bound to.
Listing 2.5. BidManager CDI-managed bean
The BidManager component isn't an EJB but simply a CDI-managed bean. This means
that other than lifecycle, dependency injection, and context management, no enterprise ser-
vices such as transaction management are available directly to the BidManager compon-