Java Reference
In-Depth Information
Listing 3.3. Singleton session bean example
The
@Singleton
annotation marks this POJO as being a singleton bean . It imple-
ments the
FeaturedItem
business interface. The
@Startup
annotation informs the
container that the bean should be eagerly created on startup . But although the bean
should be eagerly created, it shouldn't be instantiated until the
SystemInitializer
singleton bean has been created . Once the
SystemInitializer
is created, then
DefaultFeaturedItem
is instantiated, resource injection is performed, and the
init
method is called per the
@PostConstruct
annotation
. An EJB timer is created and
