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From Fraser Adams <fraser.ad...@blueyonder.co.uk>
Subject connection-logger, was Re: Headers exchange binding
Date Fri, 20 Apr 2012 18:20:39 GMT
Hi all just an update to this thread,
I've just updated the connection-logger code at 
https://issues.apache.org/jira/browse/QPID-3869 with more or less a 
complete rewrite of the algorithm.

The original version was functionally fine but it uses linear searches 
to dereference QMF Object References (pretty similar to qpid-config 
really). This is OK and quite readable, but for large numbers of 
Connections/Queues the performance gets totally trashed.

The latest version dereferences the QMF objects into Maps keyed by 
ObjectId it also resolves the 0..* associations between Connection and 
Session and Session and Subscription in order to work out which 
connections are likely to be producer only Connections.

All the QMF Object relationship stuff is quite subtle and this code 
might be a good place to go for anyone who wants to get a better 
understanding of how that all hangs together.

The Jira doesn't seem to have had any traffic, so I'm not sure if 
there's any intention to include this in the suite of python qpid tools 
any time soon but I thought I'd post an update as Sergey seems to have 
found it useful. Sergey this update should give much better performance 
if you've got lots of Connections.


On 24/02/12 10:20, Fraser Adams wrote:
> Hi Sergey,
> Thanks for the feedback that's really nice :-) I'm so pleased that
> you've given it a whirl.
> I've raised a Jira https://issues.apache.org/jira/browse/QPID-3869 and
> attached it there, so hopefully it might get picked up in a future
> release.
> Cheers,
> Frase
> On 20/02/12 07:37, Zhemzhitsky Sergey wrote:
>> Hello Fraser,
>> It's great to hear that patched qpid-config will be included in the
>> next release.
>> I've already tried connection-logger and it's seems rather useful
>> especially for debugging and monitoring qpid.
>> Have you considered to raise a jira issue to include this tool into
>> the next qpid release?
>> Best Regards,
>> Sergey
>> -----Original Message-----
>> From: Fraser Adams [mailto:fraser.adams@blueyonder.co.uk]
>> Sent: Tuesday, February 14, 2012 12:45 AM
>> To: users@qpid.apache.org
>> Subject: Re: Headers exchange binding
>> No Probs Sergey, happy I could help. I can't take any credit really,
>> this was from Gordon Sim back in March or April last year. BTW I've
>> just noticed that the Jira I raised on the subject has literally just
>> been closed off today so this fix should be making its way into the
>> next official qpid release.
>> BTW did you have a play with the Connection Logger Tool that I posted
>> on Friday? That'll allow you to display info on all of the
>> connections to a broker, the info includes queues associated with any
>> subscriptions on a connection and the bindings to the queue a la
>> qpid-config -b queues.
>> Frase
>> On 13/02/12 06:57, Zhemzhitsky Sergey wrote:
>>> Hi Fraser,
>>> It works amazing. Thanks a lot.
>>> Best Regards,
>>> Sergey Zhemzhitsky
>>> -----Original Message-----
>>> From: Fraser Adams [mailto:fraser.adams@blueyonder.co.uk]
>>> Sent: Friday, February 10, 2012 5:41 PM
>>> To: users@qpid.apache.org
>>> Subject: Re: Headers exchange binding
>>> Hi Sergey,
>>> Gordon Sim was I think going to put a small patch to qpid-config for
>>> qpid 0.14 I don't know if he did though as I've not had time to play
>>> with 0.14
>>> To tide you over I've attached a patched version of qpid-config based
>>> on the 0.8 version of qpid-config
>>> do
>>> ./qpid-config-patched -b queues
>>> look in QueueListRecuse and ExchangeListRecurse to see the differences
>>> if you want to tweak a later version of qpid-config
>>> It's only about four lines in total
>>> HTH
>>> Frase
>>> On 10/02/12 12:14, Zhemzhitsky Sergey wrote:
>>>> Hi gurus,
>>>> Is there any way to view all the binding properties of the headers
>>>> exchange?
>>>> I need to retrieve all the headers and their values among with
>>>> ‘x-match’ (all/any) property by means of api or somehow else.
>>>> Best Regards,
>>>> Sergey
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