Singleton Session Bean Introduction
Available from EJB 3.1, Singleton Session Beans are business objects having a global shared state within a JVM. The @Singleton annotation is used to mark the class as Singleton Session Bean. They [...]
@Singleton Annotation
The @Singletion annotation is used to mark the class as Singleton Session Bean. This annotation’s specification is as follows. @Target(value=TYPE) @Retention(value=RUNTIME) public @interface [...]
Creating a Singleton Session Bean
Business Interface Create the bean interface and mark it either as @Remote, @Local or @WebService. Remote Interface Local Interface Web service interface Bean implementation class Create a class [...]
Initialization of Singleton Session Bean
The EJB container is responsible for determining when to initialize a singleton session bean instance. However, the Singleton Session bean can be requested to be initialized by the container upon [...]
Singleton Session Bean Lifecycle
A singleton session bean instance’s life starts when the container invokes the newInstance method on the session bean class to create the singleton bean instance. Next, the container [...]
Singleton Concurrency
From the client’s perspective, a Singleton bean always supports concurrent access. In general, a Singleton client does not have to concern itself with whether other clients might be [...]