com.atlassian.plugin.servlet.util
Class LazyLoadedReference<V>

java.lang.Object
  java.lang.ref.Reference<T>
      java.lang.ref.WeakReference<T>
          com.atlassian.util.concurrent.LazyReference<V>
              com.atlassian.plugin.servlet.util.LazyLoadedReference<V>

All Implemented Interfaces:

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

Deprecated. since 2.5.0 use LazyReference directly instead.

@Deprecated
public abstract class LazyLoadedReference<V>
extends com.atlassian.util.concurrent.LazyReference<V>

Thread-safe lock-less (see note) reference that is not constructed until required. This class is used to maintain a reference to an object that is expensive to create and must be constructed once and once only. Therefore this reference behaves as though the final keyword has been used (you cannot reset it once it has been constructed).

When using this class you need to implement the LazyReference.create() method to return the object this reference will hold.

For instance:

 final LazyLoadedReference ref = new LazyLoadedReference()
 {
     protected Object create() throws Exception
     {
         // Do some useful object construction here
         return new MyObject();
     }
 };
 

Then call to get a reference to the object:

   MyObject myLazyLoadedObject = (MyObject) ref.get()
 

Note: Copied from JIRA com.atlassian.jira.util.concurrent.ThreadsafeLazyLoadedReference and modified to use generics and java.util.concurrent.

Since:

2.1.0

Nested Class Summary

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

com.atlassian.util.concurrent.LazyReference.InitializationException

Constructor Summary

LazyLoadedReference()
Deprecated.

Method Summary

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

cancel, create, 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

LazyLoadedReference

public LazyLoadedReference()

Deprecated.