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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 commented on COLLECTIONS-563:
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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 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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