org.jboss.weld.bean

Class ContextualInstanceStrategy<T>

java.lang.Object

org.jboss.weld.bean.ContextualInstanceStrategy<T>

Type Parameters:

T -

public abstract class ContextualInstanceStrategy<T>
extends Object

This component allows optimized strategies for obtaining contextual instances of a given bean to be plugged in. By default a contextual instance of a bean is obtained by first obtaining the context for bean's scope and then by calling Context.get(javax.enterprise.context.spi.Contextual) or Context.get(javax.enterprise.context.spi.Contextual, CreationalContext) on the given context. This algorithm matches the defaultStrategy() implementation. In addition, specialized implementations are provided. For ApplicationScoped beans a special strategy is used which caches application-scoped bean instances in a volatile field. This implementation respects the possibility of an instance being destroyed via AlterableContext and the cached instance is flushed in such case. For SessionScoped, ConversationScoped and RequestScoped beans a special strategy is used which caches contextual bean instances in a ThreadLocal. This implementation respects the possibility of an instance being destroyed via AlterableContext and the cached instance is flushed in such case. This is done indirectly by RequestScopedCache.

Author:

Jozef Hartinger

Method Summary

Modifier and Type	Method and Description
static <T> ContextualInstanceStrategy<T>	create(BeanAttributes<T> bean, BeanManagerImpl manager)
static <T> ContextualInstanceStrategy<T>	defaultStrategy()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

defaultStrategy

public static <T> ContextualInstanceStrategy<T> defaultStrategy()

create

public static <T> ContextualInstanceStrategy<T> create(BeanAttributes<T> bean,
                                                       BeanManagerImpl manager)