Startup Singleton

@Startup

Seam 2 provides the @Startup annotation that can be applied to an application or session scoped component. A Startup-annotated component is instantiated immediately after the context is started up, instead of instantiating the component lazily when first needed by a client.

There are two possible alternatives in Java EE 6:

• EJB Singleton beans – which can be marked to be instantiated eagerly at application startup using the @Startup annotation. Combined with the fact that these components can benefit from declarative transaction management, these components are good candidates for performing database imports, etc.
• Observing Solder’s events which notify the component when the application starts or when the request or session context is activated due to a servlet request.