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From "Dejan Bosanac" <de...@nighttale.net>
Subject Re: Implementing failover for Net::Stomp
Date Mon, 24 Mar 2008 09:28:34 GMT
Hi Ramit,

you can take a look at how this functionality is implemented in PHP
client (http://stomp.codehaus.org/PHP+Connectivity). Basically, you
can detect that broker is down when you try to read/write from a
socket and implement reconnection logic in those cases. BTW. error
frames are sent to the client only in ActiveMQ 5.1 and in case you
have sent receipt header with your command.

Cheers
-- 
Dejan Bosanac
www.scriptinginjava.net

On Fri, Mar 21, 2008 at 11:35 PM, Ramit Arora <ramit.arora@gmail.com> wrote:
>
>  Sure thing man, but I'll have to work this thing out first....
>  I think it can be achieved if the broker sends the client an ERROR frame
>  when it detects a shutdown in progress. My experiments show that the broker
>  currently does not send any notification to a Stomp client while shutting
>  down. Can someone from the development team confirm this? And would it be
>  possible for the broker to send a notification while shutting down to Stomp
>  clients so that failover can be implemented?
>  Any other ideas for this will be greatly appreciated.
>
>  TIA,
>  Ramit
>
>
>
>
>  Llarian wrote:
>  >
>  > If you get this worked out, would you be willing to release your
>  > Net::Stomp hacks?
>  >
>  > I'm desperatly needing HA for my perl publishers (and subscribers for that
>  > matter), but I don't have the hours to do it in house at the moment.
>  >
>  > -D
>  >
>  >> -----Original Message-----
>  >> From: Ramit Arora [mailto:ramit.arora@gmail.com]
>  >> Sent: Friday, March 21, 2008 1:50 PM
>  >> To: users@activemq.apache.org
>  >> Subject: Implementing failover for Net::Stomp
>  >>
>  >>
>  >>
>  >> Hi,
>  >> I am using ActiveMQ 5.0.0. My application requires Perl
>  >> publishers & Java
>  >> subscribers. Since HA is a necessity, I wish to implement failover
>  >> capability in the Net::Stomp client for Perl.
>  >> I've already come up with a basic solution, but I am facing
>  >> the following
>  >> problem:
>  >> I use the pipe broken signal to detect master broker failure
>  >> from perl. The
>  >> pipe does not break until the master shuts down its Stomp
>  >> connector. If I
>  >> abruptly shut down the master (power down or kill -9), then
>  >> there is no
>  >> issue. But if I cleanly shutdown the master (^C), then the
>  >> master does not
>  >> shut down its Stomp connector until it has done its cleanup.
>  >> This normally
>  >> takes around 10secs. This results in the Perl client sending
>  >> messages to the
>  >> broker for those crucial ten seconds. These messages are lost & not
>  >> delivered to the Java client.
>  >> Is there are any other way of detecting that the master is
>  >> shutting down?
>  >> Perhaps something using the STOMP ERROR frame?
>  >>
>  >> TIA,
>  >> Ramit
>  >> --
>  >> View this message in context:
>  >> http://www.nabble.com/Implementing-failover-for-Net%3A%3AStomp
>  > -tp16207964s2354p16207964.html
>  > Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>  >
>  >
>  >
>
>  --
>  View this message in context: http://www.nabble.com/Implementing-failover-for-Net%3A%3AStomp-tp16207964s2354p16210250.html
>
>
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>

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