Java Reference
In-Depth Information
The next listing shows the code that kicks off the long-running conversation.
Listing 12.17.
ItemController
—starting a conversation
This listing contains the code for the
ItemController
and specifically the
startConversation
method
referenced in
listing 12.16
.
There are a couple of im-
portant things to recognize:
• It is accessible to JSF EL expressions, as you saw in
listing 12.16
.
• It operates on an injected
Conversation
object.
• It “produces” the current selected item that then lives in the conversation.
The
@Model
annotation marks that this bean is accessible from JSF and that it
has a request-scoped lifecycle. The
@Model
annotation is a stereotype and is shorthand
for
@RequestScoped
and
@Named
. This is a common combination. Prior to the
startConversation
method being invoked from the command link, the CDI contain-
er injects a conversation object . To start the conversation, you must explicitly tell the
container that you're starting a conversation, which is done in the
startConversation
method
. At the same time, you cache the item the user has selected
in property
