Based on some message property, new messages 'overwrite' any previous message with the same value for that property.
LVQ has the same basic features as a regular queue (such as acquire modes, transactional delivery, ability to cluster, transient vs durable etc) and some special features, described below. Elements in the queue can be represented as one-dimensional array, where for a given identifier /routing key?/ there is only one message. When a new message with the same identifier arrives, it replaces a previous message with the same identifier. Sequence of the messages in the queue does not matter. If it was possible to retrieve a specific message from this logical queue, based on its identifier without retrieving other queue messages, it would be even better.
details to use: http://cwiki.apache.org/qpid/cheat-sheet-for-configuring-queue-options.html
code to test this can be found: http://cwiki.apache.org/qpid/lvq-example.html
Manually validated on RHEL 5.2 / 4.7, i386 / x86_64 on packages qpidd-0.4.725652-2.el5 using comment #4 example code. ->VERIFIED
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHEA-2009-0035.html