com.atlassian.spring.container
Class LazyComponentReference<T>

java.lang.Object
  java.lang.ref.Reference<T>
      java.lang.ref.WeakReference<T>
          com.atlassian.util.concurrent.LazyReference<T>
              com.atlassian.spring.container.LazyComponentReference<T>

Type Parameters:

T -

All Implemented Interfaces:

com.atlassian.util.concurrent.Supplier<T>

public class LazyComponentReference<T>
extends com.atlassian.util.concurrent.LazyReference<T>

Lazily loaded reference to a component that is not constructed until required. This class is not an alternative to correctly using dependency injection but is a replacement for the necessary evil of loading components in places such as servlets where all sense of best practices breaks down.

Nested Class Summary

Nested classes/interfaces inherited from class com.atlassian.util.concurrent.LazyReference

com.atlassian.util.concurrent.LazyReference.InitializationException

Constructor Summary

LazyComponentReference(java.lang.String key)

Method Summary

protected T

create() Calls ContainerManager.getComponent(String)

Methods inherited from class com.atlassian.util.concurrent.LazyReference

cancel, get, getInterruptibly, isInitialized

Methods inherited from class java.lang.ref.Reference

clear, enqueue, isEnqueued

Methods inherited from class java.lang.Object

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

Constructor Detail

LazyComponentReference

public LazyComponentReference(java.lang.String key)

Parameters:

key - of the component

Method Detail

create

protected T create()
            throws java.lang.Exception

Calls ContainerManager.getComponent(String)

Specified by:

create in class com.atlassian.util.concurrent.LazyReference<T>

Returns:

component

Throws:

java.lang.IllegalStateException - if container is not yet setup

java.lang.Exception