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https://issues.apache.org/jira/browse/COLLECTIONS-563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16966685#comment-16966685
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David Mollitor edited comment on COLLECTIONS-563 at 11/4/19 2:07 PM:
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Hey [~Guoping1] I no longer recall the use-case.  This is several years old now.

 

However, I was recently looking for an array-based _unbounded_ BlockingQueue.

[https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ArrayBlockingQueue.html]

 

Obviously an array-based blocking queue has a 'bound' approaching 
Integer.MAX_VALUE, but should be like a blocking ArrayDeque.  (Open a new Jira 
if that sounds interesting to you too)


was (Author: belugabehr):
Hey [~Guoping1] I no longer recall the use-case.  This is several years old now.

 

However, I was recently looking for an array-based _unbounded_ BlockingQueue.

[https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ArrayBlockingQueue.html]

 

Obviously an array-based blocking queue has a 'bound' approaching 
Integer.MAX_VALUE, but should be a blocking ArrayDeque.  (Open a new Jira if 
that sounds interesting to you too)

> CircularFifoDequeue
> -------------------
>
>                 Key: COLLECTIONS-563
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-563
>             Project: Commons Collections
>          Issue Type: Wish
>          Components: Collection
>            Reporter: David Mollitor
>            Priority: Major
>             Fix For: 4.x
>
>
> I have a need for a CircularFifoDequeue class and I see that Java 1.6 will be 
> supported now.  The CircularFifoDequeue would have the same functionality as 
> the currently implemented CircularFifoQueue, but can manipulate both sides of 
> the queue.  Of most interest are the abilities to: "descendingIterator," 
> "peekLast," "removeLastOccurrence."
> If an item is ended to the front of the queue throw "not supported" 
> exception? Remove the item at the back of the queue?
> If an item is added to the back of the queue with no space available, the 
> item at the front of the queue is overwritten.



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