[jira] Assigned: (QPID-1637) Update AMQPriorityQueue, potentially creating Purger thread

["Martin Ritchie (JIRA)" <qp...@incubator.apache.org>]

     [ https://issues.apache.org/jira/browse/QPID-1637?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Ritchie reassigned QPID-1637:
------------------------------------

    Assignee: Rob Godfrey  (was: Martin Ritchie)

Hi Rob can you review this please.

> Update AMQPriorityQueue, potentially creating Purger thread
> -----------------------------------------------------------
>
>                 Key: QPID-1637
>                 URL: https://issues.apache.org/jira/browse/QPID-1637
>             Project: Qpid
>          Issue Type: Sub-task
>          Components: Java Broker
>    Affects Versions: M4
>            Reporter: Martin Ritchie
>            Assignee: Rob Godfrey
>             Fix For: M5
>
>   Original Estimate: 8h
>  Remaining Estimate: 8h
>
> The SimpleAMQQueue implementation is easy to decide when to evict a message from memory as all new messages will be at the back of the queue and hence candidates for eviction.
> When a message arrives for a priority queue it is not guaranteed that it can be evicted as it may be high priority and therefore next for delivery. A quick check needs to be performed to calculate if we need to evict the message or at least start an eviction process to find the least important message instead.

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