Bug 452017 - Last value queue
Last value queue
Status: CLOSED ERRATA
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: qpid-cpp (Show other bugs)
1.0
All Linux
urgent Severity medium
: 1.1
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Assigned To: Carl Trieloff
Kim van der Riet
:
Depends On:
Blocks: 471307
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Reported: 2008-06-18 13:32 EDT by Gordon Sim
Modified: 2009-02-04 10:35 EST (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
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Last Closed: 2009-02-04 10:35:00 EST
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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Description Gordon Sim 2008-06-18 13:32:16 EDT
Based on some message property, new messages 'overwrite' any previous message
with the same value for that property.
Comment 1 Sergei Vorobiev 2008-06-19 10:38:26 EDT
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.
Comment 2 Carl Trieloff 2008-10-08 15:36:44 EDT
details to use: 
http://cwiki.apache.org/qpid/cheat-sheet-for-configuring-queue-options.html
Comment 4 Carl Trieloff 2008-11-13 15:34:16 EST
code to test this can be found:

http://cwiki.apache.org/qpid/lvq-example.html
Comment 5 Frantisek Reznicek 2008-12-12 09:04:01 EST
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
Comment 7 errata-xmlrpc 2009-02-04 10:35:00 EST
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

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