Singleton Session EJB

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Internal

Concepts

Overview

A singleton session bean is a component that is instantiated once per application. For distributed applications that span multiple VMs, each application will have on singleton session bean instance per JVM. The instances are intended to be shard, and must support concurrent access.

Lifecycle

Once instantiated, the Singleton bean instance lives for the duration of the application.

Dependencies between Singletons

Transactional Behavior

Concurrency

Also see

EJB Concepts - Concurrency

Interceptors

Restrictions

Singleton beans must not implement javax.ejb.SessionSychronization interface or use the session synchronization annotations.